Adding upstream version 1.52.0.upstream/1.52.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 13306 insertions, 0 deletions

diff --git a/tests/nghttp2_session_test.c b/tests/nghttp2_session_test.c
new file mode 100644
index 0000000..08152d4
--- /dev/null
+++ b/tests/nghttp2_session_test.c
@@ -0,0 +1,13306 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2013 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "nghttp2_session_test.h"
+
+#include <stdio.h>
+#include <assert.h>
+
+#include <CUnit/CUnit.h>
+
+#include "nghttp2_session.h"
+#include "nghttp2_stream.h"
+#include "nghttp2_net.h"
+#include "nghttp2_helper.h"
+#include "nghttp2_test_helper.h"
+#include "nghttp2_priority_spec.h"
+#include "nghttp2_extpri.h"
+
+typedef struct {
+  uint8_t buf[65535];
+  size_t length;
+} accumulator;
+
+typedef struct {
+  uint8_t data[8192];
+  uint8_t *datamark;
+  uint8_t *datalimit;
+  size_t feedseq[8192];
+  size_t seqidx;
+} scripted_data_feed;
+
+typedef struct {
+  accumulator *acc;
+  scripted_data_feed *df;
+  int frame_recv_cb_called, invalid_frame_recv_cb_called;
+  uint8_t recv_frame_type;
+  nghttp2_frame_hd recv_frame_hd;
+  int frame_send_cb_called;
+  uint8_t sent_frame_type;
+  int before_frame_send_cb_called;
+  int frame_not_send_cb_called;
+  uint8_t not_sent_frame_type;
+  int not_sent_error;
+  int stream_close_cb_called;
+  uint32_t stream_close_error_code;
+  size_t data_source_length;
+  int32_t stream_id;
+  size_t block_count;
+  int data_chunk_recv_cb_called;
+  const nghttp2_frame *frame;
+  size_t fixed_sendlen;
+  int header_cb_called;
+  int invalid_header_cb_called;
+  int begin_headers_cb_called;
+  nghttp2_nv nv;
+  size_t data_chunk_len;
+  size_t padlen;
+  int begin_frame_cb_called;
+  nghttp2_buf scratchbuf;
+  size_t data_source_read_cb_paused;
+} my_user_data;
+
+static const nghttp2_nv reqnv[] = {
+    MAKE_NV(":method", "GET"),
+    MAKE_NV(":path", "/"),
+    MAKE_NV(":scheme", "https"),
+    MAKE_NV(":authority", "localhost"),
+};
+
+static const nghttp2_nv resnv[] = {
+    MAKE_NV(":status", "200"),
+};
+
+static const nghttp2_nv trailernv[] = {
+    // from http://tools.ietf.org/html/rfc6249#section-7
+    MAKE_NV("digest", "SHA-256="
+                      "MWVkMWQxYTRiMzk5MDQ0MzI3NGU5NDEyZTk5OWY1ZGFmNzgyZTJlODYz"
+                      "YjRjYzFhOTlmNTQwYzI2M2QwM2U2MQ=="),
+};
+
+static void scripted_data_feed_init2(scripted_data_feed *df,
+                                     nghttp2_bufs *bufs) {
+  nghttp2_buf_chain *ci;
+  nghttp2_buf *buf;
+  uint8_t *ptr;
+  size_t len;
+
+  memset(df, 0, sizeof(scripted_data_feed));
+  ptr = df->data;
+  len = 0;
+
+  for (ci = bufs->head; ci; ci = ci->next) {
+    buf = &ci->buf;
+    ptr = nghttp2_cpymem(ptr, buf->pos, nghttp2_buf_len(buf));
+    len += nghttp2_buf_len(buf);
+  }
+
+  df->datamark = df->data;
+  df->datalimit = df->data + len;
+  df->feedseq[0] = len;
+}
+
+static ssize_t null_send_callback(nghttp2_session *session, const uint8_t *data,
+                                  size_t len, int flags, void *user_data) {
+  (void)session;
+  (void)data;
+  (void)flags;
+  (void)user_data;
+
+  return (ssize_t)len;
+}
+
+static ssize_t fail_send_callback(nghttp2_session *session, const uint8_t *data,
+                                  size_t len, int flags, void *user_data) {
+  (void)session;
+  (void)data;
+  (void)len;
+  (void)flags;
+  (void)user_data;
+
+  return NGHTTP2_ERR_CALLBACK_FAILURE;
+}
+
+static ssize_t fixed_bytes_send_callback(nghttp2_session *session,
+                                         const uint8_t *data, size_t len,
+                                         int flags, void *user_data) {
+  size_t fixed_sendlen = ((my_user_data *)user_data)->fixed_sendlen;
+  (void)session;
+  (void)data;
+  (void)flags;
+
+  return (ssize_t)(fixed_sendlen < len ? fixed_sendlen : len);
+}
+
+static ssize_t scripted_recv_callback(nghttp2_session *session, uint8_t *data,
+                                      size_t len, int flags, void *user_data) {
+  scripted_data_feed *df = ((my_user_data *)user_data)->df;
+  size_t wlen = df->feedseq[df->seqidx] > len ? len : df->feedseq[df->seqidx];
+  (void)session;
+  (void)flags;
+
+  memcpy(data, df->datamark, wlen);
+  df->datamark += wlen;
+  df->feedseq[df->seqidx] -= wlen;
+  if (df->feedseq[df->seqidx] == 0) {
+    ++df->seqidx;
+  }
+  return (ssize_t)wlen;
+}
+
+static ssize_t eof_recv_callback(nghttp2_session *session, uint8_t *data,
+                                 size_t len, int flags, void *user_data) {
+  (void)session;
+  (void)data;
+  (void)len;
+  (void)flags;
+  (void)user_data;
+
+  return NGHTTP2_ERR_EOF;
+}
+
+static ssize_t accumulator_send_callback(nghttp2_session *session,
+                                         const uint8_t *buf, size_t len,
+                                         int flags, void *user_data) {
+  accumulator *acc = ((my_user_data *)user_data)->acc;
+  (void)session;
+  (void)flags;
+
+  assert(acc->length + len < sizeof(acc->buf));
+  memcpy(acc->buf + acc->length, buf, len);
+  acc->length += len;
+  return (ssize_t)len;
+}
+
+static int on_begin_frame_callback(nghttp2_session *session,
+                                   const nghttp2_frame_hd *hd,
+                                   void *user_data) {
+  my_user_data *ud = (my_user_data *)user_data;
+  (void)session;
+  (void)hd;
+
+  ++ud->begin_frame_cb_called;
+  return 0;
+}
+
+static int on_frame_recv_callback(nghttp2_session *session,
+                                  const nghttp2_frame *frame, void *user_data) {
+  my_user_data *ud = (my_user_data *)user_data;
+  (void)session;
+
+  ++ud->frame_recv_cb_called;
+  ud->recv_frame_type = frame->hd.type;
+  ud->recv_frame_hd = frame->hd;
+
+  return 0;
+}
+
+static int on_invalid_frame_recv_callback(nghttp2_session *session,
+                                          const nghttp2_frame *frame,
+                                          int lib_error_code, void *user_data) {
+  my_user_data *ud = (my_user_data *)user_data;
+  (void)session;
+  (void)frame;
+  (void)lib_error_code;
+
+  ++ud->invalid_frame_recv_cb_called;
+  return 0;
+}
+
+static int on_frame_send_callback(nghttp2_session *session,
+                                  const nghttp2_frame *frame, void *user_data) {
+  my_user_data *ud = (my_user_data *)user_data;
+  (void)session;
+
+  ++ud->frame_send_cb_called;
+  ud->sent_frame_type = frame->hd.type;
+  return 0;
+}
+
+static int on_frame_not_send_callback(nghttp2_session *session,
+                                      const nghttp2_frame *frame, int lib_error,
+                                      void *user_data) {
+  my_user_data *ud = (my_user_data *)user_data;
+  (void)session;
+
+  ++ud->frame_not_send_cb_called;
+  ud->not_sent_frame_type = frame->hd.type;
+  ud->not_sent_error = lib_error;
+  return 0;
+}
+
+static int cancel_before_frame_send_callback(nghttp2_session *session,
+                                             const nghttp2_frame *frame,
+                                             void *user_data) {
+  my_user_data *ud = (my_user_data *)user_data;
+  (void)session;
+  (void)frame;
+
+  ++ud->before_frame_send_cb_called;
+  return NGHTTP2_ERR_CANCEL;
+}
+
+static int on_data_chunk_recv_callback(nghttp2_session *session, uint8_t flags,
+                                       int32_t stream_id, const uint8_t *data,
+                                       size_t len, void *user_data) {
+  my_user_data *ud = (my_user_data *)user_data;
+  (void)session;
+  (void)flags;
+  (void)stream_id;
+  (void)data;
+
+  ++ud->data_chunk_recv_cb_called;
+  ud->data_chunk_len = len;
+  return 0;
+}
+
+static int pause_on_data_chunk_recv_callback(nghttp2_session *session,
+                                             uint8_t flags, int32_t stream_id,
+                                             const uint8_t *data, size_t len,
+                                             void *user_data) {
+  my_user_data *ud = (my_user_data *)user_data;
+  (void)session;
+  (void)flags;
+  (void)stream_id;
+  (void)data;
+  (void)len;
+
+  ++ud->data_chunk_recv_cb_called;
+  return NGHTTP2_ERR_PAUSE;
+}
+
+static ssize_t select_padding_callback(nghttp2_session *session,
+                                       const nghttp2_frame *frame,
+                                       size_t max_payloadlen, void *user_data) {
+  my_user_data *ud = (my_user_data *)user_data;
+  (void)session;
+
+  return (ssize_t)nghttp2_min(max_payloadlen, frame->hd.length + ud->padlen);
+}
+
+static ssize_t too_large_data_source_length_callback(
+    nghttp2_session *session, uint8_t frame_type, int32_t stream_id,
+    int32_t session_remote_window_size, int32_t stream_remote_window_size,
+    uint32_t remote_max_frame_size, void *user_data) {
+  (void)session;
+  (void)frame_type;
+  (void)stream_id;
+  (void)session_remote_window_size;
+  (void)stream_remote_window_size;
+  (void)remote_max_frame_size;
+  (void)user_data;
+
+  return NGHTTP2_MAX_FRAME_SIZE_MAX + 1;
+}
+
+static ssize_t smallest_length_data_source_length_callback(
+    nghttp2_session *session, uint8_t frame_type, int32_t stream_id,
+    int32_t session_remote_window_size, int32_t stream_remote_window_size,
+    uint32_t remote_max_frame_size, void *user_data) {
+  (void)session;
+  (void)frame_type;
+  (void)stream_id;
+  (void)session_remote_window_size;
+  (void)stream_remote_window_size;
+  (void)remote_max_frame_size;
+  (void)user_data;
+
+  return 1;
+}
+
+static ssize_t fixed_length_data_source_read_callback(
+    nghttp2_session *session, int32_t stream_id, uint8_t *buf, size_t len,
+    uint32_t *data_flags, nghttp2_data_source *source, void *user_data) {
+  my_user_data *ud = (my_user_data *)user_data;
+  size_t wlen;
+  (void)session;
+  (void)stream_id;
+  (void)buf;
+  (void)source;
+
+  if (len < ud->data_source_length) {
+    wlen = len;
+  } else {
+    wlen = ud->data_source_length;
+  }
+  ud->data_source_length -= wlen;
+  if (ud->data_source_length == 0) {
+    *data_flags |= NGHTTP2_DATA_FLAG_EOF;
+  }
+  return (ssize_t)wlen;
+}
+
+static ssize_t temporal_failure_data_source_read_callback(
+    nghttp2_session *session, int32_t stream_id, uint8_t *buf, size_t len,
+    uint32_t *data_flags, nghttp2_data_source *source, void *user_data) {
+  (void)session;
+  (void)stream_id;
+  (void)buf;
+  (void)len;
+  (void)data_flags;
+  (void)source;
+  (void)user_data;
+
+  return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
+}
+
+static ssize_t fail_data_source_read_callback(nghttp2_session *session,
+                                              int32_t stream_id, uint8_t *buf,
+                                              size_t len, uint32_t *data_flags,
+                                              nghttp2_data_source *source,
+                                              void *user_data) {
+  (void)session;
+  (void)stream_id;
+  (void)buf;
+  (void)len;
+  (void)data_flags;
+  (void)source;
+  (void)user_data;
+
+  return NGHTTP2_ERR_CALLBACK_FAILURE;
+}
+
+static ssize_t no_end_stream_data_source_read_callback(
+    nghttp2_session *session, int32_t stream_id, uint8_t *buf, size_t len,
+    uint32_t *data_flags, nghttp2_data_source *source, void *user_data) {
+  (void)session;
+  (void)stream_id;
+  (void)buf;
+  (void)len;
+  (void)source;
+  (void)user_data;
+
+  *data_flags |= NGHTTP2_DATA_FLAG_EOF | NGHTTP2_DATA_FLAG_NO_END_STREAM;
+  return 0;
+}
+
+static ssize_t no_copy_data_source_read_callback(
+    nghttp2_session *session, int32_t stream_id, uint8_t *buf, size_t len,
+    uint32_t *data_flags, nghttp2_data_source *source, void *user_data) {
+  my_user_data *ud = (my_user_data *)user_data;
+  size_t wlen;
+  (void)session;
+  (void)stream_id;
+  (void)buf;
+  (void)source;
+
+  if (len < ud->data_source_length) {
+    wlen = len;
+  } else {
+    wlen = ud->data_source_length;
+  }
+
+  ud->data_source_length -= wlen;
+
+  *data_flags |= NGHTTP2_DATA_FLAG_NO_COPY;
+
+  if (ud->data_source_length == 0) {
+    *data_flags |= NGHTTP2_DATA_FLAG_EOF;
+  }
+  return (ssize_t)wlen;
+}
+
+static int send_data_callback(nghttp2_session *session, nghttp2_frame *frame,
+                              const uint8_t *framehd, size_t length,
+                              nghttp2_data_source *source, void *user_data) {
+  accumulator *acc = ((my_user_data *)user_data)->acc;
+  (void)session;
+  (void)source;
+
+  memcpy(acc->buf + acc->length, framehd, NGHTTP2_FRAME_HDLEN);
+  acc->length += NGHTTP2_FRAME_HDLEN;
+
+  if (frame->data.padlen) {
+    *(acc->buf + acc->length++) = (uint8_t)(frame->data.padlen - 1);
+  }
+
+  acc->length += length;
+
+  if (frame->data.padlen) {
+    acc->length += frame->data.padlen - 1;
+  }
+
+  return 0;
+}
+
+static ssize_t block_count_send_callback(nghttp2_session *session,
+                                         const uint8_t *data, size_t len,
+                                         int flags, void *user_data) {
+  my_user_data *ud = (my_user_data *)user_data;
+  (void)session;
+  (void)data;
+  (void)flags;
+
+  if (ud->block_count == 0) {
+    return NGHTTP2_ERR_WOULDBLOCK;
+  }
+
+  --ud->block_count;
+  return (ssize_t)len;
+}
+
+static int on_header_callback(nghttp2_session *session,
+                              const nghttp2_frame *frame, const uint8_t *name,
+                              size_t namelen, const uint8_t *value,
+                              size_t valuelen, uint8_t flags, void *user_data) {
+  my_user_data *ud = (my_user_data *)user_data;
+  (void)session;
+  (void)flags;
+
+  ++ud->header_cb_called;
+  ud->nv.name = (uint8_t *)name;
+  ud->nv.namelen = namelen;
+  ud->nv.value = (uint8_t *)value;
+  ud->nv.valuelen = valuelen;
+
+  ud->frame = frame;
+  return 0;
+}
+
+static int pause_on_header_callback(nghttp2_session *session,
+                                    const nghttp2_frame *frame,
+                                    const uint8_t *name, size_t namelen,
+                                    const uint8_t *value, size_t valuelen,
+                                    uint8_t flags, void *user_data) {
+  on_header_callback(session, frame, name, namelen, value, valuelen, flags,
+                     user_data);
+  return NGHTTP2_ERR_PAUSE;
+}
+
+static int temporal_failure_on_header_callback(
+    nghttp2_session *session, const nghttp2_frame *frame, const uint8_t *name,
+    size_t namelen, const uint8_t *value, size_t valuelen, uint8_t flags,
+    void *user_data) {
+  on_header_callback(session, frame, name, namelen, value, valuelen, flags,
+                     user_data);
+  return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
+}
+
+static int on_invalid_header_callback(nghttp2_session *session,
+                                      const nghttp2_frame *frame,
+                                      const uint8_t *name, size_t namelen,
+                                      const uint8_t *value, size_t valuelen,
+                                      uint8_t flags, void *user_data) {
+  my_user_data *ud = (my_user_data *)user_data;
+  (void)session;
+  (void)flags;
+
+  ++ud->invalid_header_cb_called;
+  ud->nv.name = (uint8_t *)name;
+  ud->nv.namelen = namelen;
+  ud->nv.value = (uint8_t *)value;
+  ud->nv.valuelen = valuelen;
+
+  ud->frame = frame;
+  return 0;
+}
+
+static int pause_on_invalid_header_callback(nghttp2_session *session,
+                                            const nghttp2_frame *frame,
+                                            const uint8_t *name, size_t namelen,
+                                            const uint8_t *value,
+                                            size_t valuelen, uint8_t flags,
+                                            void *user_data) {
+  on_invalid_header_callback(session, frame, name, namelen, value, valuelen,
+                             flags, user_data);
+  return NGHTTP2_ERR_PAUSE;
+}
+
+static int reset_on_invalid_header_callback(nghttp2_session *session,
+                                            const nghttp2_frame *frame,
+                                            const uint8_t *name, size_t namelen,
+                                            const uint8_t *value,
+                                            size_t valuelen, uint8_t flags,
+                                            void *user_data) {
+  on_invalid_header_callback(session, frame, name, namelen, value, valuelen,
+                             flags, user_data);
+  return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
+}
+
+static int on_begin_headers_callback(nghttp2_session *session,
+                                     const nghttp2_frame *frame,
+                                     void *user_data) {
+  my_user_data *ud = (my_user_data *)user_data;
+  (void)session;
+  (void)frame;
+
+  ++ud->begin_headers_cb_called;
+  return 0;
+}
+
+static int temporal_failure_on_begin_headers_callback(
+    nghttp2_session *session, const nghttp2_frame *frame, void *user_data) {
+  on_begin_headers_callback(session, frame, user_data);
+  return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
+}
+
+static ssize_t defer_data_source_read_callback(nghttp2_session *session,
+                                               int32_t stream_id, uint8_t *buf,
+                                               size_t len, uint32_t *data_flags,
+                                               nghttp2_data_source *source,
+                                               void *user_data) {
+  (void)session;
+  (void)stream_id;
+  (void)buf;
+  (void)len;
+  (void)data_flags;
+  (void)source;
+  (void)user_data;
+
+  return NGHTTP2_ERR_DEFERRED;
+}
+
+static int on_stream_close_callback(nghttp2_session *session, int32_t stream_id,
+                                    nghttp2_error_code error_code,
+                                    void *user_data) {
+  my_user_data *my_data = (my_user_data *)user_data;
+  (void)session;
+  (void)stream_id;
+  (void)error_code;
+
+  ++my_data->stream_close_cb_called;
+  my_data->stream_close_error_code = error_code;
+
+  return 0;
+}
+
+static ssize_t pack_extension_callback(nghttp2_session *session, uint8_t *buf,
+                                       size_t len, const nghttp2_frame *frame,
+                                       void *user_data) {
+  nghttp2_buf *p = frame->ext.payload;
+  (void)session;
+  (void)len;
+  (void)user_data;
+
+  memcpy(buf, p->pos, nghttp2_buf_len(p));
+
+  return (ssize_t)nghttp2_buf_len(p);
+}
+
+static int on_extension_chunk_recv_callback(nghttp2_session *session,
+                                            const nghttp2_frame_hd *hd,
+                                            const uint8_t *data, size_t len,
+                                            void *user_data) {
+  my_user_data *my_data = (my_user_data *)user_data;
+  nghttp2_buf *buf = &my_data->scratchbuf;
+  (void)session;
+  (void)hd;
+
+  buf->last = nghttp2_cpymem(buf->last, data, len);
+
+  return 0;
+}
+
+static int cancel_on_extension_chunk_recv_callback(nghttp2_session *session,
+                                                   const nghttp2_frame_hd *hd,
+                                                   const uint8_t *data,
+                                                   size_t len,
+                                                   void *user_data) {
+  (void)session;
+  (void)hd;
+  (void)data;
+  (void)len;
+  (void)user_data;
+
+  return NGHTTP2_ERR_CANCEL;
+}
+
+static int unpack_extension_callback(nghttp2_session *session, void **payload,
+                                     const nghttp2_frame_hd *hd,
+                                     void *user_data) {
+  my_user_data *my_data = (my_user_data *)user_data;
+  nghttp2_buf *buf = &my_data->scratchbuf;
+  (void)session;
+  (void)hd;
+
+  *payload = buf;
+
+  return 0;
+}
+
+static int cancel_unpack_extension_callback(nghttp2_session *session,
+                                            void **payload,
+                                            const nghttp2_frame_hd *hd,
+                                            void *user_data) {
+  (void)session;
+  (void)payload;
+  (void)hd;
+  (void)user_data;
+
+  return NGHTTP2_ERR_CANCEL;
+}
+
+static nghttp2_settings_entry *dup_iv(const nghttp2_settings_entry *iv,
+                                      size_t niv) {
+  return nghttp2_frame_iv_copy(iv, niv, nghttp2_mem_default());
+}
+
+static nghttp2_priority_spec pri_spec_default = {0, NGHTTP2_DEFAULT_WEIGHT, 0};
+
+void test_nghttp2_session_recv(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  scripted_data_feed df;
+  my_user_data user_data;
+  nghttp2_bufs bufs;
+  size_t framelen;
+  nghttp2_frame frame;
+  size_t i;
+  nghttp2_outbound_item *item;
+  nghttp2_nv *nva;
+  size_t nvlen;
+  nghttp2_hd_deflater deflater;
+  int rv;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+  callbacks.recv_callback = scripted_recv_callback;
+  callbacks.on_frame_recv_callback = on_frame_recv_callback;
+  callbacks.on_begin_frame_callback = on_begin_frame_callback;
+
+  user_data.df = &df;
+
+  nghttp2_session_server_new(&session, &callbacks, &user_data);
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  nvlen = ARRLEN(reqnv);
+  nghttp2_nv_array_copy(&nva, reqnv, nvlen, mem);
+  nghttp2_frame_headers_init(&frame.headers, NGHTTP2_FLAG_END_HEADERS, 1,
+                             NGHTTP2_HCAT_HEADERS, NULL, nva, nvlen);
+  rv = nghttp2_frame_pack_headers(&bufs, &frame.headers, &deflater);
+
+  CU_ASSERT(0 == rv);
+
+  scripted_data_feed_init2(&df, &bufs);
+
+  framelen = nghttp2_bufs_len(&bufs);
+
+  /* Send 1 byte per each read */
+  for (i = 0; i < framelen; ++i) {
+    df.feedseq[i] = 1;
+  }
+
+  nghttp2_frame_headers_free(&frame.headers, mem);
+
+  user_data.frame_recv_cb_called = 0;
+  user_data.begin_frame_cb_called = 0;
+
+  while (df.seqidx < framelen) {
+    CU_ASSERT(0 == nghttp2_session_recv(session));
+  }
+  CU_ASSERT(1 == user_data.frame_recv_cb_called);
+  CU_ASSERT(1 == user_data.begin_frame_cb_called);
+
+  nghttp2_bufs_reset(&bufs);
+
+  /* Receive PRIORITY */
+  nghttp2_frame_priority_init(&frame.priority, 5, &pri_spec_default);
+
+  rv = nghttp2_frame_pack_priority(&bufs, &frame.priority);
+
+  CU_ASSERT(0 == rv);
+
+  nghttp2_frame_priority_free(&frame.priority);
+
+  scripted_data_feed_init2(&df, &bufs);
+
+  user_data.frame_recv_cb_called = 0;
+  user_data.begin_frame_cb_called = 0;
+
+  CU_ASSERT(0 == nghttp2_session_recv(session));
+  CU_ASSERT(1 == user_data.frame_recv_cb_called);
+  CU_ASSERT(1 == user_data.begin_frame_cb_called);
+
+  nghttp2_bufs_reset(&bufs);
+
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_session_del(session);
+
+  /* Some tests for frame too large */
+  nghttp2_session_server_new(&session, &callbacks, &user_data);
+
+  /* Receive PING with too large payload */
+  nghttp2_frame_ping_init(&frame.ping, NGHTTP2_FLAG_NONE, NULL);
+
+  rv = nghttp2_frame_pack_ping(&bufs, &frame.ping);
+
+  CU_ASSERT(0 == rv);
+
+  /* Add extra 16 bytes */
+  nghttp2_bufs_seek_last_present(&bufs);
+  assert(nghttp2_buf_len(&bufs.cur->buf) >= 16);
+
+  bufs.cur->buf.last += 16;
+  nghttp2_put_uint32be(
+      bufs.cur->buf.pos,
+      (uint32_t)(((frame.hd.length + 16) << 8) + bufs.cur->buf.pos[3]));
+
+  nghttp2_frame_ping_free(&frame.ping);
+
+  scripted_data_feed_init2(&df, &bufs);
+  user_data.frame_recv_cb_called = 0;
+  user_data.begin_frame_cb_called = 0;
+
+  CU_ASSERT(0 == nghttp2_session_recv(session));
+  CU_ASSERT(0 == user_data.frame_recv_cb_called);
+  CU_ASSERT(0 == user_data.begin_frame_cb_called);
+
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_GOAWAY == item->frame.hd.type);
+  CU_ASSERT(NGHTTP2_FRAME_SIZE_ERROR == item->frame.goaway.error_code);
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  nghttp2_bufs_free(&bufs);
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_recv_invalid_stream_id(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  scripted_data_feed df;
+  my_user_data user_data;
+  nghttp2_bufs bufs;
+  nghttp2_frame frame;
+  nghttp2_hd_deflater deflater;
+  int rv;
+  nghttp2_mem *mem;
+  nghttp2_nv *nva;
+  size_t nvlen;
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.recv_callback = scripted_recv_callback;
+  callbacks.on_invalid_frame_recv_callback = on_invalid_frame_recv_callback;
+
+  user_data.df = &df;
+  user_data.invalid_frame_recv_cb_called = 0;
+  nghttp2_session_server_new(&session, &callbacks, &user_data);
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  nvlen = ARRLEN(reqnv);
+  nghttp2_nv_array_copy(&nva, reqnv, nvlen, mem);
+  nghttp2_frame_headers_init(&frame.headers, NGHTTP2_FLAG_END_HEADERS, 2,
+                             NGHTTP2_HCAT_HEADERS, NULL, nva, nvlen);
+  rv = nghttp2_frame_pack_headers(&bufs, &frame.headers, &deflater);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(nghttp2_bufs_len(&bufs) > 0);
+
+  scripted_data_feed_init2(&df, &bufs);
+  nghttp2_frame_headers_free(&frame.headers, mem);
+
+  CU_ASSERT(0 == nghttp2_session_recv(session));
+  CU_ASSERT(1 == user_data.invalid_frame_recv_cb_called);
+
+  nghttp2_bufs_free(&bufs);
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_recv_invalid_frame(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  scripted_data_feed df;
+  my_user_data user_data;
+  nghttp2_bufs bufs;
+  nghttp2_frame frame;
+  nghttp2_nv *nva;
+  size_t nvlen;
+  nghttp2_hd_deflater deflater;
+  int rv;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.recv_callback = scripted_recv_callback;
+  callbacks.send_callback = null_send_callback;
+  callbacks.on_frame_send_callback = on_frame_send_callback;
+
+  user_data.df = &df;
+  user_data.frame_send_cb_called = 0;
+  nghttp2_session_server_new(&session, &callbacks, &user_data);
+  nghttp2_hd_deflate_init(&deflater, mem);
+  nvlen = ARRLEN(reqnv);
+  nghttp2_nv_array_copy(&nva, reqnv, nvlen, mem);
+  nghttp2_frame_headers_init(&frame.headers, NGHTTP2_FLAG_END_HEADERS, 1,
+                             NGHTTP2_HCAT_HEADERS, NULL, nva, nvlen);
+  rv = nghttp2_frame_pack_headers(&bufs, &frame.headers, &deflater);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(nghttp2_bufs_len(&bufs) > 0);
+
+  scripted_data_feed_init2(&df, &bufs);
+
+  CU_ASSERT(0 == nghttp2_session_recv(session));
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(0 == user_data.frame_send_cb_called);
+
+  /* Receive exactly same bytes of HEADERS is treated as error, because it has
+   * pseudo headers and without END_STREAM flag set */
+  scripted_data_feed_init2(&df, &bufs);
+
+  CU_ASSERT(0 == nghttp2_session_recv(session));
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(1 == user_data.frame_send_cb_called);
+  CU_ASSERT(NGHTTP2_RST_STREAM == user_data.sent_frame_type);
+
+  nghttp2_bufs_free(&bufs);
+  nghttp2_frame_headers_free(&frame.headers, mem);
+
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_recv_eof(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+  callbacks.recv_callback = eof_recv_callback;
+
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+  CU_ASSERT(NGHTTP2_ERR_EOF == nghttp2_session_recv(session));
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_recv_data(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data ud;
+  uint8_t data[8092];
+  ssize_t rv;
+  nghttp2_outbound_item *item;
+  nghttp2_stream *stream;
+  nghttp2_frame_hd hd;
+  int i;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+  callbacks.on_data_chunk_recv_callback = on_data_chunk_recv_callback;
+  callbacks.on_frame_recv_callback = on_frame_recv_callback;
+  callbacks.on_frame_send_callback = on_frame_send_callback;
+
+  nghttp2_session_client_new(&session, &callbacks, &ud);
+
+  /* Create DATA frame with length 4KiB */
+  memset(data, 0, sizeof(data));
+  hd.length = 4096;
+  hd.type = NGHTTP2_DATA;
+  hd.flags = NGHTTP2_FLAG_NONE;
+  hd.stream_id = 1;
+  nghttp2_frame_pack_frame_hd(data, &hd);
+
+  /* stream 1 is not opened, so it must be responded with connection
+     error.  This is not mandated by the spec */
+  ud.data_chunk_recv_cb_called = 0;
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, data, NGHTTP2_FRAME_HDLEN + 4096);
+  CU_ASSERT(NGHTTP2_FRAME_HDLEN + 4096 == rv);
+
+  CU_ASSERT(0 == ud.data_chunk_recv_cb_called);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_GOAWAY == item->frame.hd.type);
+
+  nghttp2_session_del(session);
+
+  nghttp2_session_client_new(&session, &callbacks, &ud);
+
+  /* Create stream 1 with CLOSING state. DATA is ignored. */
+  stream = open_sent_stream2(session, 1, NGHTTP2_STREAM_CLOSING);
+
+  /* Set initial window size 16383 to check stream flow control,
+     isolating it from the connection flow control */
+  stream->local_window_size = 16383;
+
+  ud.data_chunk_recv_cb_called = 0;
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, data, NGHTTP2_FRAME_HDLEN + 4096);
+  CU_ASSERT(NGHTTP2_FRAME_HDLEN + 4096 == rv);
+
+  CU_ASSERT(0 == ud.data_chunk_recv_cb_called);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NULL == item);
+
+  /* This is normal case. DATA is acceptable. */
+  stream->state = NGHTTP2_STREAM_OPENED;
+
+  ud.data_chunk_recv_cb_called = 0;
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, data, NGHTTP2_FRAME_HDLEN + 4096);
+  CU_ASSERT(NGHTTP2_FRAME_HDLEN + 4096 == rv);
+
+  CU_ASSERT(1 == ud.data_chunk_recv_cb_called);
+  CU_ASSERT(1 == ud.frame_recv_cb_called);
+
+  CU_ASSERT(NULL == nghttp2_session_get_next_ob_item(session));
+
+  ud.data_chunk_recv_cb_called = 0;
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, data, NGHTTP2_FRAME_HDLEN + 4096);
+  CU_ASSERT(NGHTTP2_FRAME_HDLEN + 4096 == rv);
+
+  /* Now we got data more than initial-window-size / 2, WINDOW_UPDATE
+     must be queued */
+  CU_ASSERT(1 == ud.data_chunk_recv_cb_called);
+  CU_ASSERT(1 == ud.frame_recv_cb_called);
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_WINDOW_UPDATE == item->frame.hd.type);
+  CU_ASSERT(1 == item->frame.window_update.hd.stream_id);
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  /* Set initial window size to 1MiB, so that we can check connection
+     flow control individually */
+  stream->local_window_size = 1 << 20;
+  /* Connection flow control takes into account DATA which is received
+     in the error condition. We have received 4096 * 4 bytes of
+     DATA. Additional 4 DATA frames, connection flow control will kick
+     in. */
+  for (i = 0; i < 5; ++i) {
+    rv = nghttp2_session_mem_recv(session, data, NGHTTP2_FRAME_HDLEN + 4096);
+    CU_ASSERT(NGHTTP2_FRAME_HDLEN + 4096 == rv);
+  }
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_WINDOW_UPDATE == item->frame.hd.type);
+  CU_ASSERT(0 == item->frame.window_update.hd.stream_id);
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  /* Reception of DATA with stream ID = 0 causes connection error */
+  hd.length = 4096;
+  hd.type = NGHTTP2_DATA;
+  hd.flags = NGHTTP2_FLAG_NONE;
+  hd.stream_id = 0;
+  nghttp2_frame_pack_frame_hd(data, &hd);
+
+  ud.data_chunk_recv_cb_called = 0;
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, data, NGHTTP2_FRAME_HDLEN + 4096);
+  CU_ASSERT(NGHTTP2_FRAME_HDLEN + 4096 == rv);
+
+  CU_ASSERT(0 == ud.data_chunk_recv_cb_called);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_GOAWAY == item->frame.hd.type);
+  CU_ASSERT(NGHTTP2_PROTOCOL_ERROR == item->frame.goaway.error_code);
+
+  nghttp2_session_del(session);
+
+  /* Check window_update_queued flag in both session and stream */
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+
+  hd.length = 4096;
+  hd.type = NGHTTP2_DATA;
+  hd.flags = NGHTTP2_FLAG_NONE;
+  hd.stream_id = 1;
+  nghttp2_frame_pack_frame_hd(data, &hd);
+
+  stream = open_recv_stream(session, 1);
+
+  /* Send 32767 bytes of DATA.  In our current flow control algorithm,
+     it triggers first WINDOW_UPDATE of window_size_increment
+     32767. */
+  for (i = 0; i < 7; ++i) {
+    rv = nghttp2_session_mem_recv(session, data, NGHTTP2_FRAME_HDLEN + 4096);
+    CU_ASSERT(NGHTTP2_FRAME_HDLEN + 4096 == rv);
+  }
+
+  hd.length = 4095;
+  nghttp2_frame_pack_frame_hd(data, &hd);
+  rv = nghttp2_session_mem_recv(session, data, NGHTTP2_FRAME_HDLEN + 4095);
+  CU_ASSERT(NGHTTP2_FRAME_HDLEN + 4095 == rv);
+
+  /* Now 2 WINDOW_UPDATEs for session and stream should be queued. */
+  CU_ASSERT(0 == stream->recv_window_size);
+  CU_ASSERT(0 == session->recv_window_size);
+  CU_ASSERT(1 == stream->window_update_queued);
+  CU_ASSERT(1 == session->window_update_queued);
+
+  /* Then send 32768 bytes of DATA.  Since we have not sent queued
+     WINDOW_UDPATE frame, recv_window_size should not be decreased */
+  hd.length = 4096;
+  nghttp2_frame_pack_frame_hd(data, &hd);
+
+  for (i = 0; i < 8; ++i) {
+    rv = nghttp2_session_mem_recv(session, data, NGHTTP2_FRAME_HDLEN + 4096);
+    CU_ASSERT(NGHTTP2_FRAME_HDLEN + 4096 == rv);
+  }
+
+  /* WINDOW_UPDATE is blocked for session and stream, so
+     recv_window_size must not be decreased. */
+  CU_ASSERT(32768 == stream->recv_window_size);
+  CU_ASSERT(32768 == session->recv_window_size);
+  CU_ASSERT(1 == stream->window_update_queued);
+  CU_ASSERT(1 == session->window_update_queued);
+
+  ud.frame_send_cb_called = 0;
+
+  /* This sends queued WINDOW_UPDATES.  And then check
+     recv_window_size, and queue WINDOW_UPDATEs for both session and
+     stream, and send them at once. */
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  CU_ASSERT(4 == ud.frame_send_cb_called);
+  CU_ASSERT(0 == stream->recv_window_size);
+  CU_ASSERT(0 == session->recv_window_size);
+  CU_ASSERT(0 == stream->window_update_queued);
+  CU_ASSERT(0 == session->window_update_queued);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_recv_data_no_auto_flow_control(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data ud;
+  nghttp2_option *option;
+  nghttp2_frame_hd hd;
+  size_t padlen;
+  uint8_t data[8192];
+  ssize_t rv;
+  size_t sendlen;
+  nghttp2_stream *stream;
+  size_t i;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+  callbacks.on_frame_send_callback = on_frame_send_callback;
+
+  nghttp2_option_new(&option);
+  nghttp2_option_set_no_auto_window_update(option, 1);
+
+  nghttp2_session_server_new2(&session, &callbacks, &ud, option);
+
+  /* Create DATA frame with length 4KiB + 11 bytes padding*/
+  padlen = 11;
+  memset(data, 0, sizeof(data));
+  hd.length = 4096 + 1 + padlen;
+  hd.type = NGHTTP2_DATA;
+  hd.flags = NGHTTP2_FLAG_PADDED;
+  hd.stream_id = 1;
+  nghttp2_frame_pack_frame_hd(data, &hd);
+  data[NGHTTP2_FRAME_HDLEN] = (uint8_t)padlen;
+
+  /* First create stream 1, then close it.  Check that data is
+     consumed for connection in this situation */
+  open_recv_stream(session, 1);
+
+  /* Receive first 100 bytes */
+  sendlen = 100;
+  rv = nghttp2_session_mem_recv(session, data, sendlen);
+  CU_ASSERT((ssize_t)sendlen == rv);
+
+  /* We consumed pad length field (1 byte) */
+  CU_ASSERT(1 == session->consumed_size);
+
+  /* close stream here */
+  nghttp2_submit_rst_stream(session, NGHTTP2_FLAG_NONE, 1, NGHTTP2_NO_ERROR);
+  nghttp2_session_send(session);
+
+  /* stream 1 has been closed, and we disabled auto flow-control, so
+     data must be immediately consumed for connection. */
+  rv = nghttp2_session_mem_recv(session, data + sendlen,
+                                NGHTTP2_FRAME_HDLEN + hd.length - sendlen);
+  CU_ASSERT((ssize_t)(NGHTTP2_FRAME_HDLEN + hd.length - sendlen) == rv);
+
+  /* We already consumed pad length field (1 byte), so do +1 here */
+  CU_ASSERT((int32_t)(NGHTTP2_FRAME_HDLEN + hd.length - sendlen + 1) ==
+            session->consumed_size);
+
+  nghttp2_session_del(session);
+
+  /* Reuse DATA created previously. */
+
+  nghttp2_session_server_new2(&session, &callbacks, &ud, option);
+
+  /* Now we are expecting final response header, which means receiving
+     DATA for that stream is illegal. */
+  stream = open_recv_stream(session, 1);
+  stream->http_flags |= NGHTTP2_HTTP_FLAG_EXPECT_FINAL_RESPONSE;
+
+  rv = nghttp2_session_mem_recv(session, data, NGHTTP2_FRAME_HDLEN + hd.length);
+  CU_ASSERT((ssize_t)(NGHTTP2_FRAME_HDLEN + hd.length) == rv);
+
+  /* Whole payload must be consumed now because HTTP messaging rule
+     was not honored. */
+  CU_ASSERT((int32_t)hd.length == session->consumed_size);
+
+  nghttp2_session_del(session);
+
+  /* Check window_update_queued flag in both session and stream */
+  nghttp2_session_server_new2(&session, &callbacks, &ud, option);
+
+  stream = open_recv_stream(session, 1);
+
+  hd.length = 4096;
+  hd.type = NGHTTP2_DATA;
+  hd.flags = NGHTTP2_FLAG_NONE;
+  hd.stream_id = 1;
+  nghttp2_frame_pack_frame_hd(data, &hd);
+
+  /* Receive up to 65535 bytes of DATA */
+  for (i = 0; i < 15; ++i) {
+    rv = nghttp2_session_mem_recv(session, data, NGHTTP2_FRAME_HDLEN + 4096);
+    CU_ASSERT(NGHTTP2_FRAME_HDLEN + 4096 == rv);
+  }
+
+  hd.length = 4095;
+  nghttp2_frame_pack_frame_hd(data, &hd);
+
+  rv = nghttp2_session_mem_recv(session, data, NGHTTP2_FRAME_HDLEN + 4095);
+  CU_ASSERT(NGHTTP2_FRAME_HDLEN + 4095 == rv);
+
+  CU_ASSERT(65535 == session->recv_window_size);
+  CU_ASSERT(65535 == stream->recv_window_size);
+
+  /* The first call of nghttp2_session_consume_connection() will queue
+     WINDOW_UPDATE.  Next call does not. */
+  nghttp2_session_consume_connection(session, 32767);
+  nghttp2_session_consume_connection(session, 32768);
+
+  CU_ASSERT(32768 == session->recv_window_size);
+  CU_ASSERT(65535 == stream->recv_window_size);
+  CU_ASSERT(1 == session->window_update_queued);
+  CU_ASSERT(0 == stream->window_update_queued);
+
+  ud.frame_send_cb_called = 0;
+
+  /* This will send WINDOW_UPDATE, and check whether we should send
+     WINDOW_UPDATE, and queue and send it at once. */
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(0 == session->recv_window_size);
+  CU_ASSERT(65535 == stream->recv_window_size);
+  CU_ASSERT(0 == session->window_update_queued);
+  CU_ASSERT(0 == stream->window_update_queued);
+  CU_ASSERT(2 == ud.frame_send_cb_called);
+
+  /* Do the same for stream */
+  nghttp2_session_consume_stream(session, 1, 32767);
+  nghttp2_session_consume_stream(session, 1, 32768);
+
+  CU_ASSERT(0 == session->recv_window_size);
+  CU_ASSERT(32768 == stream->recv_window_size);
+  CU_ASSERT(0 == session->window_update_queued);
+  CU_ASSERT(1 == stream->window_update_queued);
+
+  ud.frame_send_cb_called = 0;
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(0 == session->recv_window_size);
+  CU_ASSERT(0 == stream->recv_window_size);
+  CU_ASSERT(0 == session->window_update_queued);
+  CU_ASSERT(0 == stream->window_update_queued);
+  CU_ASSERT(2 == ud.frame_send_cb_called);
+
+  nghttp2_session_del(session);
+  nghttp2_option_del(option);
+}
+
+void test_nghttp2_session_recv_continuation(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_nv *nva;
+  size_t nvlen;
+  nghttp2_frame frame;
+  nghttp2_bufs bufs;
+  nghttp2_buf *buf;
+  ssize_t rv;
+  my_user_data ud;
+  nghttp2_hd_deflater deflater;
+  uint8_t data[1024];
+  size_t datalen;
+  nghttp2_frame_hd cont_hd;
+  nghttp2_priority_spec pri_spec;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.on_header_callback = on_header_callback;
+  callbacks.on_begin_headers_callback = on_begin_headers_callback;
+  callbacks.on_begin_frame_callback = on_begin_frame_callback;
+
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  /* Make 1 HEADERS and insert CONTINUATION header */
+  nvlen = ARRLEN(reqnv);
+  nghttp2_nv_array_copy(&nva, reqnv, nvlen, mem);
+  nghttp2_frame_headers_init(&frame.headers, NGHTTP2_FLAG_NONE, 1,
+                             NGHTTP2_HCAT_HEADERS, NULL, nva, nvlen);
+  rv = nghttp2_frame_pack_headers(&bufs, &frame.headers, &deflater);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(nghttp2_bufs_len(&bufs) > 0);
+
+  /* make sure that all data is in the first buf */
+  buf = &bufs.head->buf;
+  assert(nghttp2_bufs_len(&bufs) == nghttp2_buf_len(buf));
+
+  nghttp2_frame_headers_free(&frame.headers, mem);
+
+  /* HEADERS's payload is 1 byte */
+  memcpy(data, buf->pos, NGHTTP2_FRAME_HDLEN + 1);
+  datalen = NGHTTP2_FRAME_HDLEN + 1;
+  buf->pos += NGHTTP2_FRAME_HDLEN + 1;
+
+  nghttp2_put_uint32be(data, (uint32_t)((1 << 8) + data[3]));
+
+  /* First CONTINUATION, 2 bytes */
+  nghttp2_frame_hd_init(&cont_hd, 2, NGHTTP2_CONTINUATION, NGHTTP2_FLAG_NONE,
+                        1);
+
+  nghttp2_frame_pack_frame_hd(data + datalen, &cont_hd);
+  datalen += NGHTTP2_FRAME_HDLEN;
+
+  memcpy(data + datalen, buf->pos, cont_hd.length);
+  datalen += cont_hd.length;
+  buf->pos += cont_hd.length;
+
+  /* Second CONTINUATION, rest of the bytes */
+  nghttp2_frame_hd_init(&cont_hd, nghttp2_buf_len(buf), NGHTTP2_CONTINUATION,
+                        NGHTTP2_FLAG_END_HEADERS, 1);
+
+  nghttp2_frame_pack_frame_hd(data + datalen, &cont_hd);
+  datalen += NGHTTP2_FRAME_HDLEN;
+
+  memcpy(data + datalen, buf->pos, cont_hd.length);
+  datalen += cont_hd.length;
+  buf->pos += cont_hd.length;
+
+  CU_ASSERT(0 == nghttp2_buf_len(buf));
+
+  ud.header_cb_called = 0;
+  ud.begin_frame_cb_called = 0;
+
+  rv = nghttp2_session_mem_recv(session, data, datalen);
+  CU_ASSERT((ssize_t)datalen == rv);
+  CU_ASSERT(4 == ud.header_cb_called);
+  CU_ASSERT(3 == ud.begin_frame_cb_called);
+
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_session_del(session);
+
+  /* HEADERS with padding followed by CONTINUATION */
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  nvlen = ARRLEN(reqnv);
+  nghttp2_nv_array_copy(&nva, reqnv, nvlen, mem);
+  nghttp2_frame_headers_init(&frame.headers, NGHTTP2_FLAG_NONE, 1,
+                             NGHTTP2_HCAT_HEADERS, NULL, nva, nvlen);
+
+  nghttp2_bufs_reset(&bufs);
+  rv = nghttp2_frame_pack_headers(&bufs, &frame.headers, &deflater);
+
+  CU_ASSERT(0 == rv);
+
+  nghttp2_frame_headers_free(&frame.headers, mem);
+
+  /* make sure that all data is in the first buf */
+  buf = &bufs.head->buf;
+  assert(nghttp2_bufs_len(&bufs) == nghttp2_buf_len(buf));
+
+  /* HEADERS payload is 3 byte (1 for padding field, 1 for padding) */
+  memcpy(data, buf->pos, NGHTTP2_FRAME_HDLEN);
+  nghttp2_put_uint32be(data, (uint32_t)((3 << 8) + data[3]));
+  data[4] |= NGHTTP2_FLAG_PADDED;
+  /* padding field */
+  data[NGHTTP2_FRAME_HDLEN] = 1;
+  data[NGHTTP2_FRAME_HDLEN + 1] = buf->pos[NGHTTP2_FRAME_HDLEN];
+  /* padding */
+  data[NGHTTP2_FRAME_HDLEN + 2] = 0;
+  datalen = NGHTTP2_FRAME_HDLEN + 3;
+  buf->pos += NGHTTP2_FRAME_HDLEN + 1;
+
+  /* CONTINUATION, rest of the bytes */
+  nghttp2_frame_hd_init(&cont_hd, nghttp2_buf_len(buf), NGHTTP2_CONTINUATION,
+                        NGHTTP2_FLAG_END_HEADERS, 1);
+  nghttp2_frame_pack_frame_hd(data + datalen, &cont_hd);
+  datalen += NGHTTP2_FRAME_HDLEN;
+
+  memcpy(data + datalen, buf->pos, cont_hd.length);
+  datalen += cont_hd.length;
+  buf->pos += cont_hd.length;
+
+  CU_ASSERT(0 == nghttp2_buf_len(buf));
+
+  ud.header_cb_called = 0;
+  ud.begin_frame_cb_called = 0;
+
+  rv = nghttp2_session_mem_recv(session, data, datalen);
+
+  CU_ASSERT((ssize_t)datalen == rv);
+  CU_ASSERT(4 == ud.header_cb_called);
+  CU_ASSERT(2 == ud.begin_frame_cb_called);
+
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_session_del(session);
+
+  /* Expecting CONTINUATION, but get the other frame */
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  /* HEADERS without END_HEADERS flag */
+  nvlen = ARRLEN(reqnv);
+  nghttp2_nv_array_copy(&nva, reqnv, nvlen, mem);
+  nghttp2_frame_headers_init(&frame.headers, NGHTTP2_FLAG_NONE, 1,
+                             NGHTTP2_HCAT_HEADERS, NULL, nva, nvlen);
+  nghttp2_bufs_reset(&bufs);
+  rv = nghttp2_frame_pack_headers(&bufs, &frame.headers, &deflater);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(nghttp2_bufs_len(&bufs) > 0);
+
+  nghttp2_frame_headers_free(&frame.headers, mem);
+
+  /* make sure that all data is in the first buf */
+  buf = &bufs.head->buf;
+  assert(nghttp2_bufs_len(&bufs) == nghttp2_buf_len(buf));
+
+  memcpy(data, buf->pos, nghttp2_buf_len(buf));
+  datalen = nghttp2_buf_len(buf);
+
+  /* Followed by PRIORITY */
+  nghttp2_priority_spec_default_init(&pri_spec);
+
+  nghttp2_frame_priority_init(&frame.priority, 1, &pri_spec);
+  nghttp2_bufs_reset(&bufs);
+
+  rv = nghttp2_frame_pack_priority(&bufs, &frame.priority);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(nghttp2_bufs_len(&bufs) > 0);
+
+  memcpy(data + datalen, buf->pos, nghttp2_buf_len(buf));
+  datalen += nghttp2_buf_len(buf);
+
+  ud.begin_headers_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, data, datalen);
+  CU_ASSERT((ssize_t)datalen == rv);
+
+  CU_ASSERT(1 == ud.begin_headers_cb_called);
+  CU_ASSERT(NGHTTP2_GOAWAY ==
+            nghttp2_session_get_next_ob_item(session)->frame.hd.type);
+
+  nghttp2_bufs_free(&bufs);
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_recv_headers_with_priority(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_nv *nva;
+  size_t nvlen;
+  nghttp2_frame frame;
+  nghttp2_bufs bufs;
+  nghttp2_buf *buf;
+  ssize_t rv;
+  my_user_data ud;
+  nghttp2_hd_deflater deflater;
+  nghttp2_outbound_item *item;
+  nghttp2_priority_spec pri_spec;
+  nghttp2_stream *stream;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.on_frame_recv_callback = on_frame_recv_callback;
+
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  open_recv_stream(session, 1);
+
+  /* With NGHTTP2_FLAG_PRIORITY without exclusive flag set */
+  nvlen = ARRLEN(reqnv);
+  nghttp2_nv_array_copy(&nva, reqnv, nvlen, mem);
+
+  nghttp2_priority_spec_init(&pri_spec, 1, 99, 0);
+
+  nghttp2_frame_headers_init(&frame.headers,
+                             NGHTTP2_FLAG_END_HEADERS | NGHTTP2_FLAG_PRIORITY,
+                             3, NGHTTP2_HCAT_HEADERS, &pri_spec, nva, nvlen);
+
+  rv = nghttp2_frame_pack_headers(&bufs, &frame.headers, &deflater);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(nghttp2_bufs_len(&bufs) > 0);
+
+  nghttp2_frame_headers_free(&frame.headers, mem);
+
+  buf = &bufs.head->buf;
+  assert(nghttp2_bufs_len(&bufs) == nghttp2_buf_len(buf));
+
+  ud.frame_recv_cb_called = 0;
+
+  rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(buf) == rv);
+  CU_ASSERT(1 == ud.frame_recv_cb_called);
+
+  stream = nghttp2_session_get_stream(session, 3);
+
+  CU_ASSERT(99 == stream->weight);
+  CU_ASSERT(1 == stream->dep_prev->stream_id);
+
+  nghttp2_bufs_reset(&bufs);
+
+  /* With NGHTTP2_FLAG_PRIORITY, but cut last 1 byte to make it
+     invalid. */
+  nvlen = ARRLEN(reqnv);
+  nghttp2_nv_array_copy(&nva, reqnv, nvlen, mem);
+
+  nghttp2_priority_spec_init(&pri_spec, 0, 99, 0);
+
+  nghttp2_frame_headers_init(&frame.headers,
+                             NGHTTP2_FLAG_END_HEADERS | NGHTTP2_FLAG_PRIORITY,
+                             5, NGHTTP2_HCAT_HEADERS, &pri_spec, nva, nvlen);
+
+  rv = nghttp2_frame_pack_headers(&bufs, &frame.headers, &deflater);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(nghttp2_bufs_len(&bufs) > NGHTTP2_FRAME_HDLEN + 5);
+
+  nghttp2_frame_headers_free(&frame.headers, mem);
+
+  buf = &bufs.head->buf;
+  /* Make payload shorter than required length to store priority
+     group */
+  nghttp2_put_uint32be(buf->pos, (uint32_t)((4 << 8) + buf->pos[3]));
+
+  ud.frame_recv_cb_called = 0;
+
+  rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(buf) == rv);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+
+  stream = nghttp2_session_get_stream(session, 5);
+
+  CU_ASSERT(NULL == stream);
+
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NULL != item);
+  CU_ASSERT(NGHTTP2_GOAWAY == item->frame.hd.type);
+  CU_ASSERT(NGHTTP2_FRAME_SIZE_ERROR == item->frame.goaway.error_code);
+
+  nghttp2_bufs_reset(&bufs);
+
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_session_del(session);
+
+  /* Check dep_stream_id == stream_id */
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  nvlen = ARRLEN(reqnv);
+  nghttp2_nv_array_copy(&nva, reqnv, nvlen, mem);
+
+  nghttp2_priority_spec_init(&pri_spec, 1, 0, 0);
+
+  nghttp2_frame_headers_init(&frame.headers,
+                             NGHTTP2_FLAG_END_HEADERS | NGHTTP2_FLAG_PRIORITY,
+                             1, NGHTTP2_HCAT_HEADERS, &pri_spec, nva, nvlen);
+
+  rv = nghttp2_frame_pack_headers(&bufs, &frame.headers, &deflater);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(nghttp2_bufs_len(&bufs) > 0);
+
+  nghttp2_frame_headers_free(&frame.headers, mem);
+
+  buf = &bufs.head->buf;
+  assert(nghttp2_bufs_len(&bufs) == nghttp2_buf_len(buf));
+
+  ud.frame_recv_cb_called = 0;
+
+  rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(buf) == rv);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+
+  stream = nghttp2_session_get_stream(session, 1);
+
+  CU_ASSERT(NULL == stream);
+
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NULL != item);
+  CU_ASSERT(NGHTTP2_GOAWAY == item->frame.hd.type);
+  CU_ASSERT(NGHTTP2_PROTOCOL_ERROR == item->frame.goaway.error_code);
+
+  nghttp2_bufs_reset(&bufs);
+
+  nghttp2_bufs_free(&bufs);
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_recv_headers_with_padding(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_bufs bufs;
+  nghttp2_buf *buf;
+  nghttp2_frame_hd hd;
+  nghttp2_outbound_item *item;
+  my_user_data ud;
+  ssize_t rv;
+
+  frame_pack_bufs_init(&bufs);
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.on_frame_recv_callback = on_frame_recv_callback;
+  callbacks.send_callback = null_send_callback;
+
+  /* HEADERS: Wrong padding length */
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+  nghttp2_session_send(session);
+
+  nghttp2_frame_hd_init(&hd, 10, NGHTTP2_HEADERS,
+                        NGHTTP2_FLAG_END_HEADERS | NGHTTP2_FLAG_PRIORITY |
+                            NGHTTP2_FLAG_PADDED,
+                        1);
+  buf = &bufs.head->buf;
+  nghttp2_frame_pack_frame_hd(buf->last, &hd);
+  buf->last += NGHTTP2_FRAME_HDLEN;
+  /* padding is 6 bytes */
+  *buf->last++ = 5;
+  /* priority field */
+  nghttp2_put_uint32be(buf->last, 3);
+  buf->last += sizeof(uint32_t);
+  *buf->last++ = 1;
+  /* rest is garbage */
+  memset(buf->last, 0, 4);
+  buf->last += 4;
+
+  ud.frame_recv_cb_called = 0;
+
+  rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(buf) == rv);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(NULL != item);
+  CU_ASSERT(NGHTTP2_GOAWAY == item->frame.hd.type);
+
+  nghttp2_bufs_reset(&bufs);
+  nghttp2_session_del(session);
+
+  /* PUSH_PROMISE: Wrong padding length */
+  nghttp2_session_client_new(&session, &callbacks, &ud);
+  nghttp2_session_send(session);
+
+  open_sent_stream(session, 1);
+
+  nghttp2_frame_hd_init(&hd, 9, NGHTTP2_PUSH_PROMISE,
+                        NGHTTP2_FLAG_END_HEADERS | NGHTTP2_FLAG_PADDED, 1);
+  buf = &bufs.head->buf;
+  nghttp2_frame_pack_frame_hd(buf->last, &hd);
+  buf->last += NGHTTP2_FRAME_HDLEN;
+  /* padding is 6 bytes */
+  *buf->last++ = 5;
+  /* promised stream ID field */
+  nghttp2_put_uint32be(buf->last, 2);
+  buf->last += sizeof(uint32_t);
+  /* rest is garbage */
+  memset(buf->last, 0, 4);
+  buf->last += 4;
+
+  ud.frame_recv_cb_called = 0;
+
+  rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(buf) == rv);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(NULL != item);
+  CU_ASSERT(NGHTTP2_GOAWAY == item->frame.hd.type);
+
+  nghttp2_bufs_free(&bufs);
+  nghttp2_session_del(session);
+}
+
+static int response_on_begin_frame_callback(nghttp2_session *session,
+                                            const nghttp2_frame_hd *hd,
+                                            void *user_data) {
+  int rv;
+  (void)user_data;
+
+  if (hd->type != NGHTTP2_HEADERS) {
+    return 0;
+  }
+
+  rv = nghttp2_submit_response(session, hd->stream_id, resnv, ARRLEN(resnv),
+                               NULL);
+
+  CU_ASSERT(0 == rv);
+
+  return 0;
+}
+
+void test_nghttp2_session_recv_headers_early_response(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_bufs bufs;
+  nghttp2_buf *buf;
+  nghttp2_hd_deflater deflater;
+  nghttp2_mem *mem;
+  nghttp2_nv *nva;
+  size_t nvlen;
+  nghttp2_frame frame;
+  ssize_t rv;
+  nghttp2_stream *stream;
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+  callbacks.on_begin_frame_callback = response_on_begin_frame_callback;
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  nvlen = ARRLEN(reqnv);
+  nghttp2_nv_array_copy(&nva, reqnv, nvlen, mem);
+  nghttp2_frame_headers_init(&frame.headers,
+                             NGHTTP2_FLAG_END_HEADERS | NGHTTP2_FLAG_END_STREAM,
+                             1, NGHTTP2_HCAT_REQUEST, NULL, nva, nvlen);
+
+  rv = nghttp2_frame_pack_headers(&bufs, &frame.headers, &deflater);
+
+  CU_ASSERT(0 == rv);
+
+  nghttp2_frame_headers_free(&frame.headers, mem);
+
+  buf = &bufs.head->buf;
+
+  /* Only receive 9 bytes headers, and invoke
+     on_begin_frame_callback */
+  rv = nghttp2_session_mem_recv(session, buf->pos, 9);
+
+  CU_ASSERT(9 == rv);
+
+  rv = nghttp2_session_send(session);
+
+  CU_ASSERT(0 == rv);
+
+  rv =
+      nghttp2_session_mem_recv(session, buf->pos + 9, nghttp2_buf_len(buf) - 9);
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(buf) - 9 == rv);
+
+  stream = nghttp2_session_get_stream_raw(session, 1);
+
+  CU_ASSERT(stream->flags & NGHTTP2_STREAM_FLAG_CLOSED);
+
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_session_del(session);
+  nghttp2_bufs_free(&bufs);
+}
+
+void test_nghttp2_session_recv_headers_for_closed_stream(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_nv *nva;
+  size_t nvlen;
+  nghttp2_frame frame;
+  nghttp2_bufs bufs;
+  nghttp2_buf *buf;
+  ssize_t rv;
+  my_user_data ud;
+  nghttp2_hd_deflater deflater;
+  nghttp2_stream *stream;
+  nghttp2_mem *mem;
+  const uint8_t *data;
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.on_frame_recv_callback = on_frame_recv_callback;
+  callbacks.on_header_callback = on_header_callback;
+
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  /* Make sure that on_header callback never be invoked for closed
+     stream */
+  nvlen = ARRLEN(reqnv);
+  nghttp2_nv_array_copy(&nva, reqnv, nvlen, mem);
+
+  nghttp2_frame_headers_init(&frame.headers, NGHTTP2_FLAG_END_HEADERS, 1,
+                             NGHTTP2_HCAT_HEADERS, NULL, nva, nvlen);
+
+  rv = nghttp2_frame_pack_headers(&bufs, &frame.headers, &deflater);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(nghttp2_bufs_len(&bufs) > 0);
+
+  nghttp2_frame_headers_free(&frame.headers, mem);
+
+  buf = &bufs.head->buf;
+  assert(nghttp2_bufs_len(&bufs) == nghttp2_buf_len(buf));
+
+  ud.header_cb_called = 0;
+  ud.frame_recv_cb_called = 0;
+
+  rv = nghttp2_session_mem_recv(session, buf->pos, NGHTTP2_FRAME_HDLEN);
+
+  CU_ASSERT(NGHTTP2_FRAME_HDLEN == rv);
+  CU_ASSERT(0 == ud.header_cb_called);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+
+  stream = nghttp2_session_get_stream(session, 1);
+
+  CU_ASSERT(NULL != stream);
+
+  rv = nghttp2_submit_rst_stream(session, NGHTTP2_FLAG_NONE, 1,
+                                 NGHTTP2_NO_ERROR);
+
+  CU_ASSERT(0 == rv);
+
+  rv = nghttp2_session_mem_send(session, &data);
+
+  CU_ASSERT(rv > 0);
+
+  stream = nghttp2_session_get_stream(session, 1);
+
+  CU_ASSERT(NULL == stream);
+
+  ud.header_cb_called = 0;
+  ud.frame_recv_cb_called = 0;
+
+  rv = nghttp2_session_mem_recv(session, buf->pos + NGHTTP2_FRAME_HDLEN,
+                                nghttp2_buf_len(buf) - NGHTTP2_FRAME_HDLEN);
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(buf) - NGHTTP2_FRAME_HDLEN == rv);
+  CU_ASSERT(0 == ud.header_cb_called);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+
+  nghttp2_bufs_free(&bufs);
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_recv_headers_with_extpri(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_nv *nva;
+  size_t nvlen;
+  nghttp2_frame frame;
+  nghttp2_bufs bufs;
+  nghttp2_buf *buf;
+  ssize_t rv;
+  nghttp2_hd_deflater deflater;
+  nghttp2_stream *stream;
+  nghttp2_mem *mem;
+  const nghttp2_nv extpri_reqnv[] = {
+      MAKE_NV(":method", "GET"),    MAKE_NV(":path", "/"),
+      MAKE_NV(":scheme", "https"),  MAKE_NV(":authority", "localhost"),
+      MAKE_NV("priority", "i,u=2"),
+  };
+  nghttp2_settings_entry iv;
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  iv.settings_id = NGHTTP2_SETTINGS_NO_RFC7540_PRIORITIES;
+  iv.value = 1;
+
+  nghttp2_submit_settings(session, NGHTTP2_FLAG_NONE, &iv, 1);
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  nvlen = ARRLEN(extpri_reqnv);
+  nghttp2_nv_array_copy(&nva, extpri_reqnv, nvlen, mem);
+
+  nghttp2_frame_headers_init(&frame.headers, NGHTTP2_FLAG_END_HEADERS, 1,
+                             NGHTTP2_HCAT_HEADERS, NULL, nva, nvlen);
+
+  rv = nghttp2_frame_pack_headers(&bufs, &frame.headers, &deflater);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(nghttp2_bufs_len(&bufs) > 0);
+
+  nghttp2_frame_headers_free(&frame.headers, mem);
+
+  buf = &bufs.head->buf;
+  assert(nghttp2_bufs_len(&bufs) == nghttp2_buf_len(buf));
+
+  rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf));
+
+  stream = nghttp2_session_get_stream(session, 1);
+
+  CU_ASSERT(2 == nghttp2_extpri_uint8_urgency(stream->extpri));
+  CU_ASSERT(1 == nghttp2_extpri_uint8_inc(stream->extpri));
+
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_session_del(session);
+
+  nghttp2_bufs_reset(&bufs);
+
+  /* Client should ignore priority header field included in
+     PUSH_PROMISE. */
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+
+  nghttp2_submit_settings(session, NGHTTP2_FLAG_NONE, &iv, 1);
+
+  open_sent_stream(session, 1);
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  nvlen = ARRLEN(extpri_reqnv);
+  nghttp2_nv_array_copy(&nva, extpri_reqnv, nvlen, mem);
+
+  nghttp2_frame_push_promise_init(&frame.push_promise, NGHTTP2_FLAG_END_HEADERS,
+                                  1, 2, nva, nvlen);
+
+  rv = nghttp2_frame_pack_push_promise(&bufs, &frame.push_promise, &deflater);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(nghttp2_bufs_len(&bufs) > 0);
+
+  nghttp2_frame_push_promise_free(&frame.push_promise, mem);
+
+  buf = &bufs.head->buf;
+  assert(nghttp2_bufs_len(&bufs) == nghttp2_buf_len(buf));
+
+  rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf));
+
+  stream = nghttp2_session_get_stream(session, 2);
+
+  CU_ASSERT(NGHTTP2_EXTPRI_DEFAULT_URGENCY ==
+            nghttp2_extpri_uint8_urgency(stream->http_extpri));
+  CU_ASSERT(NGHTTP2_EXTPRI_DEFAULT_URGENCY ==
+            nghttp2_extpri_uint8_urgency(stream->extpri));
+
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_session_del(session);
+  nghttp2_bufs_free(&bufs);
+}
+
+void test_nghttp2_session_server_recv_push_response(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_bufs bufs;
+  nghttp2_buf *buf;
+  ssize_t rv;
+  my_user_data ud;
+  nghttp2_mem *mem;
+  nghttp2_frame frame;
+  nghttp2_hd_deflater deflater;
+  nghttp2_nv *nva;
+  size_t nvlen;
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.on_invalid_frame_recv_callback = on_invalid_frame_recv_callback;
+
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  open_sent_stream2(session, 2, NGHTTP2_STREAM_RESERVED);
+
+  nvlen = ARRLEN(resnv);
+  nghttp2_nv_array_copy(&nva, resnv, nvlen, mem);
+  nghttp2_frame_headers_init(&frame.headers, NGHTTP2_FLAG_END_HEADERS, 2,
+                             NGHTTP2_HCAT_HEADERS, &pri_spec_default, nva,
+                             nvlen);
+  rv = nghttp2_frame_pack_headers(&bufs, &frame.headers, &deflater);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(nghttp2_bufs_len(&bufs) > 0);
+
+  nghttp2_frame_headers_free(&frame.headers, mem);
+
+  buf = &bufs.head->buf;
+
+  ud.invalid_frame_recv_cb_called = 0;
+
+  rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(buf) == rv);
+  CU_ASSERT(1 == ud.invalid_frame_recv_cb_called);
+
+  nghttp2_bufs_free(&bufs);
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_recv_premature_headers(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_bufs bufs;
+  nghttp2_buf *buf;
+  ssize_t rv;
+  my_user_data ud;
+  nghttp2_hd_deflater deflater;
+  nghttp2_outbound_item *item;
+  nghttp2_mem *mem;
+  uint32_t payloadlen;
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  pack_headers(&bufs, &deflater, 1, NGHTTP2_FLAG_END_HEADERS, reqnv,
+               ARRLEN(reqnv), mem);
+
+  buf = &bufs.head->buf;
+  /* Intentionally feed payload cutting last 1 byte off */
+  payloadlen = nghttp2_get_uint32(buf->pos) >> 8;
+  nghttp2_put_uint32be(buf->pos, ((payloadlen - 1) << 8) + buf->pos[3]);
+  rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf) - 1);
+
+  CU_ASSERT((ssize_t)(nghttp2_buf_len(buf) - 1) == rv);
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(NULL != item);
+  CU_ASSERT(NGHTTP2_RST_STREAM == item->frame.hd.type);
+  CU_ASSERT(NGHTTP2_COMPRESSION_ERROR == item->frame.rst_stream.error_code);
+  CU_ASSERT(1 == item->frame.hd.stream_id);
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  nghttp2_bufs_reset(&bufs);
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_session_del(session);
+
+  /* Test for PUSH_PROMISE */
+  nghttp2_session_client_new(&session, &callbacks, &ud);
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  open_sent_stream3(session, 1, NGHTTP2_STREAM_FLAG_NONE, &pri_spec_default,
+                    NGHTTP2_STREAM_OPENING, NULL);
+
+  rv = pack_push_promise(&bufs, &deflater, 1, NGHTTP2_FLAG_END_HEADERS, 2,
+                         reqnv, ARRLEN(reqnv), mem);
+
+  CU_ASSERT(0 == rv);
+
+  buf = &bufs.head->buf;
+  payloadlen = nghttp2_get_uint32(buf->pos) >> 8;
+  /* Intentionally feed payload cutting last 1 byte off */
+  nghttp2_put_uint32be(buf->pos, ((payloadlen - 1) << 8) + buf->pos[3]);
+  rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf) - 1);
+
+  CU_ASSERT((ssize_t)(nghttp2_buf_len(buf) - 1) == rv);
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(NULL != item);
+  CU_ASSERT(NGHTTP2_RST_STREAM == item->frame.hd.type);
+  CU_ASSERT(NGHTTP2_COMPRESSION_ERROR == item->frame.rst_stream.error_code);
+  CU_ASSERT(2 == item->frame.hd.stream_id);
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_session_del(session);
+  nghttp2_bufs_free(&bufs);
+}
+
+void test_nghttp2_session_recv_unknown_frame(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data ud;
+  uint8_t data[16384];
+  size_t datalen;
+  nghttp2_frame_hd hd;
+  ssize_t rv;
+
+  nghttp2_frame_hd_init(&hd, 16000, 99, NGHTTP2_FLAG_NONE, 0);
+
+  nghttp2_frame_pack_frame_hd(data, &hd);
+  datalen = NGHTTP2_FRAME_HDLEN + hd.length;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.on_frame_recv_callback = on_frame_recv_callback;
+
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+
+  ud.frame_recv_cb_called = 0;
+
+  /* Unknown frame must be ignored */
+  rv = nghttp2_session_mem_recv(session, data, datalen);
+
+  CU_ASSERT(rv == (ssize_t)datalen);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+  CU_ASSERT(NULL == nghttp2_session_get_next_ob_item(session));
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_recv_unexpected_continuation(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data ud;
+  uint8_t data[16384];
+  size_t datalen;
+  nghttp2_frame_hd hd;
+  ssize_t rv;
+  nghttp2_outbound_item *item;
+
+  nghttp2_frame_hd_init(&hd, 16000, NGHTTP2_CONTINUATION,
+                        NGHTTP2_FLAG_END_HEADERS, 1);
+
+  nghttp2_frame_pack_frame_hd(data, &hd);
+  datalen = NGHTTP2_FRAME_HDLEN + hd.length;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.on_frame_recv_callback = on_frame_recv_callback;
+
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+
+  open_recv_stream(session, 1);
+
+  ud.frame_recv_cb_called = 0;
+
+  /* unexpected CONTINUATION must be treated as connection error */
+  rv = nghttp2_session_mem_recv(session, data, datalen);
+
+  CU_ASSERT(rv == (ssize_t)datalen);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(NGHTTP2_GOAWAY == item->frame.hd.type);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_recv_settings_header_table_size(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_frame frame;
+  nghttp2_bufs bufs;
+  nghttp2_buf *buf;
+  ssize_t rv;
+  my_user_data ud;
+  nghttp2_settings_entry iv[3];
+  nghttp2_nv nv = MAKE_NV(":authority", "example.org");
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.on_frame_recv_callback = on_frame_recv_callback;
+  callbacks.send_callback = null_send_callback;
+
+  nghttp2_session_client_new(&session, &callbacks, &ud);
+
+  iv[0].settings_id = NGHTTP2_SETTINGS_HEADER_TABLE_SIZE;
+  iv[0].value = 3000;
+
+  iv[1].settings_id = NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE;
+  iv[1].value = 16384;
+
+  nghttp2_frame_settings_init(&frame.settings, NGHTTP2_FLAG_NONE, dup_iv(iv, 2),
+                              2);
+
+  rv = nghttp2_frame_pack_settings(&bufs, &frame.settings);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(nghttp2_bufs_len(&bufs) > 0);
+
+  nghttp2_frame_settings_free(&frame.settings, mem);
+
+  buf = &bufs.head->buf;
+  assert(nghttp2_bufs_len(&bufs) == nghttp2_buf_len(buf));
+
+  ud.frame_recv_cb_called = 0;
+
+  rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(buf) == rv);
+  CU_ASSERT(1 == ud.frame_recv_cb_called);
+
+  CU_ASSERT(3000 == session->remote_settings.header_table_size);
+  CU_ASSERT(16384 == session->remote_settings.initial_window_size);
+
+  nghttp2_bufs_reset(&bufs);
+
+  /* 2 SETTINGS_HEADER_TABLE_SIZE */
+  iv[0].settings_id = NGHTTP2_SETTINGS_HEADER_TABLE_SIZE;
+  iv[0].value = 3001;
+
+  iv[1].settings_id = NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE;
+  iv[1].value = 16383;
+
+  iv[2].settings_id = NGHTTP2_SETTINGS_HEADER_TABLE_SIZE;
+  iv[2].value = 3001;
+
+  nghttp2_frame_settings_init(&frame.settings, NGHTTP2_FLAG_NONE, dup_iv(iv, 3),
+                              3);
+
+  rv = nghttp2_frame_pack_settings(&bufs, &frame.settings);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(nghttp2_bufs_len(&bufs) > 0);
+
+  nghttp2_frame_settings_free(&frame.settings, mem);
+
+  buf = &bufs.head->buf;
+  assert(nghttp2_bufs_len(&bufs) == nghttp2_buf_len(buf));
+
+  ud.frame_recv_cb_called = 0;
+
+  rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf));
+
+  CU_ASSERT((ssize_t)(nghttp2_buf_len(buf)) == rv);
+  CU_ASSERT(1 == ud.frame_recv_cb_called);
+
+  CU_ASSERT(3001 == session->remote_settings.header_table_size);
+  CU_ASSERT(16383 == session->remote_settings.initial_window_size);
+
+  nghttp2_bufs_reset(&bufs);
+
+  /* 2 SETTINGS_HEADER_TABLE_SIZE; first entry clears dynamic header
+     table. */
+
+  nghttp2_submit_request(session, NULL, &nv, 1, NULL, NULL);
+  nghttp2_session_send(session);
+
+  CU_ASSERT(0 < session->hd_deflater.ctx.hd_table.len);
+
+  iv[0].settings_id = NGHTTP2_SETTINGS_HEADER_TABLE_SIZE;
+  iv[0].value = 0;
+
+  iv[1].settings_id = NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE;
+  iv[1].value = 16382;
+
+  iv[2].settings_id = NGHTTP2_SETTINGS_HEADER_TABLE_SIZE;
+  iv[2].value = 4096;
+
+  nghttp2_frame_settings_init(&frame.settings, NGHTTP2_FLAG_NONE, dup_iv(iv, 3),
+                              3);
+
+  rv = nghttp2_frame_pack_settings(&bufs, &frame.settings);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(nghttp2_bufs_len(&bufs) > 0);
+
+  nghttp2_frame_settings_free(&frame.settings, mem);
+
+  buf = &bufs.head->buf;
+  assert(nghttp2_bufs_len(&bufs) == nghttp2_buf_len(buf));
+
+  ud.frame_recv_cb_called = 0;
+
+  rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(buf) == rv);
+  CU_ASSERT(1 == ud.frame_recv_cb_called);
+
+  CU_ASSERT(4096 == session->remote_settings.header_table_size);
+  CU_ASSERT(16382 == session->remote_settings.initial_window_size);
+  CU_ASSERT(0 == session->hd_deflater.ctx.hd_table.len);
+
+  nghttp2_bufs_reset(&bufs);
+
+  /* 2 SETTINGS_HEADER_TABLE_SIZE; second entry clears dynamic header
+     table. */
+
+  nghttp2_submit_request(session, NULL, &nv, 1, NULL, NULL);
+  nghttp2_session_send(session);
+
+  CU_ASSERT(0 < session->hd_deflater.ctx.hd_table.len);
+
+  iv[0].settings_id = NGHTTP2_SETTINGS_HEADER_TABLE_SIZE;
+  iv[0].value = 3000;
+
+  iv[1].settings_id = NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE;
+  iv[1].value = 16381;
+
+  iv[2].settings_id = NGHTTP2_SETTINGS_HEADER_TABLE_SIZE;
+  iv[2].value = 0;
+
+  nghttp2_frame_settings_init(&frame.settings, NGHTTP2_FLAG_NONE, dup_iv(iv, 3),
+                              3);
+
+  rv = nghttp2_frame_pack_settings(&bufs, &frame.settings);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(nghttp2_bufs_len(&bufs) > 0);
+
+  nghttp2_frame_settings_free(&frame.settings, mem);
+
+  buf = &bufs.head->buf;
+  assert(nghttp2_bufs_len(&bufs) == nghttp2_buf_len(buf));
+
+  ud.frame_recv_cb_called = 0;
+
+  rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(buf) == rv);
+  CU_ASSERT(1 == ud.frame_recv_cb_called);
+
+  CU_ASSERT(0 == session->remote_settings.header_table_size);
+  CU_ASSERT(16381 == session->remote_settings.initial_window_size);
+  CU_ASSERT(0 == session->hd_deflater.ctx.hd_table.len);
+
+  nghttp2_bufs_reset(&bufs);
+
+  nghttp2_bufs_free(&bufs);
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_recv_too_large_frame_length(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  uint8_t buf[NGHTTP2_FRAME_HDLEN];
+  nghttp2_outbound_item *item;
+  nghttp2_frame_hd hd;
+
+  /* Initial max frame size is NGHTTP2_MAX_FRAME_SIZE_MIN */
+  nghttp2_frame_hd_init(&hd, NGHTTP2_MAX_FRAME_SIZE_MIN + 1, NGHTTP2_HEADERS,
+                        NGHTTP2_FLAG_NONE, 1);
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  nghttp2_frame_pack_frame_hd(buf, &hd);
+
+  CU_ASSERT(sizeof(buf) == nghttp2_session_mem_recv(session, buf, sizeof(buf)));
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(item != NULL);
+  CU_ASSERT(NGHTTP2_GOAWAY == item->frame.hd.type);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_recv_extension(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data ud;
+  nghttp2_buf buf;
+  nghttp2_frame_hd hd;
+  nghttp2_mem *mem;
+  const char data[] = "Hello World!";
+  ssize_t rv;
+  nghttp2_option *option;
+
+  mem = nghttp2_mem_default();
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+
+  callbacks.on_extension_chunk_recv_callback = on_extension_chunk_recv_callback;
+  callbacks.unpack_extension_callback = unpack_extension_callback;
+  callbacks.on_frame_recv_callback = on_frame_recv_callback;
+
+  nghttp2_option_new(&option);
+  nghttp2_option_set_user_recv_extension_type(option, 111);
+
+  nghttp2_buf_init2(&ud.scratchbuf, 4096, mem);
+  nghttp2_buf_init2(&buf, 4096, mem);
+
+  nghttp2_frame_hd_init(&hd, sizeof(data), 111, 0xab, 1000000007);
+  nghttp2_frame_pack_frame_hd(buf.last, &hd);
+  buf.last += NGHTTP2_FRAME_HDLEN;
+  buf.last = nghttp2_cpymem(buf.last, data, sizeof(data));
+
+  nghttp2_session_client_new2(&session, &callbacks, &ud, option);
+
+  nghttp2_frame_hd_init(&ud.recv_frame_hd, 0, 0, 0, 0);
+  rv = nghttp2_session_mem_recv(session, buf.pos, nghttp2_buf_len(&buf));
+
+  CU_ASSERT(NGHTTP2_FRAME_HDLEN + hd.length == (size_t)rv);
+  CU_ASSERT(111 == ud.recv_frame_hd.type);
+  CU_ASSERT(0xab == ud.recv_frame_hd.flags);
+  CU_ASSERT(1000000007 == ud.recv_frame_hd.stream_id);
+  CU_ASSERT(0 == memcmp(data, ud.scratchbuf.pos, sizeof(data)));
+
+  nghttp2_session_del(session);
+
+  /* cancel in on_extension_chunk_recv_callback */
+  nghttp2_buf_reset(&ud.scratchbuf);
+
+  callbacks.on_extension_chunk_recv_callback =
+      cancel_on_extension_chunk_recv_callback;
+
+  nghttp2_session_server_new2(&session, &callbacks, &ud, option);
+
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, buf.pos, nghttp2_buf_len(&buf));
+
+  CU_ASSERT(NGHTTP2_FRAME_HDLEN + hd.length == (size_t)rv);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+
+  nghttp2_session_del(session);
+
+  /* cancel in unpack_extension_callback */
+  nghttp2_buf_reset(&ud.scratchbuf);
+
+  callbacks.on_extension_chunk_recv_callback = on_extension_chunk_recv_callback;
+  callbacks.unpack_extension_callback = cancel_unpack_extension_callback;
+
+  nghttp2_session_server_new2(&session, &callbacks, &ud, option);
+
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, buf.pos, nghttp2_buf_len(&buf));
+
+  CU_ASSERT(NGHTTP2_FRAME_HDLEN + hd.length == (size_t)rv);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+
+  nghttp2_session_del(session);
+
+  nghttp2_buf_free(&buf, mem);
+  nghttp2_buf_free(&ud.scratchbuf, mem);
+
+  nghttp2_option_del(option);
+}
+
+void test_nghttp2_session_recv_altsvc(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data ud;
+  nghttp2_buf buf;
+  nghttp2_frame_hd hd;
+  nghttp2_mem *mem;
+  ssize_t rv;
+  nghttp2_option *option;
+  static const uint8_t origin[] = "nghttp2.org";
+  static const uint8_t field_value[] = "h2=\":443\"";
+
+  mem = nghttp2_mem_default();
+
+  nghttp2_buf_init2(&buf, NGHTTP2_FRAME_HDLEN + NGHTTP2_MAX_FRAME_SIZE_MIN,
+                    mem);
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+
+  callbacks.on_frame_recv_callback = on_frame_recv_callback;
+  callbacks.on_invalid_frame_recv_callback = on_invalid_frame_recv_callback;
+
+  nghttp2_option_new(&option);
+  nghttp2_option_set_builtin_recv_extension_type(option, NGHTTP2_ALTSVC);
+
+  nghttp2_session_client_new2(&session, &callbacks, &ud, option);
+
+  nghttp2_frame_hd_init(&hd, 2 + sizeof(origin) - 1 + sizeof(field_value) - 1,
+                        NGHTTP2_ALTSVC, NGHTTP2_FLAG_NONE, 0);
+  nghttp2_frame_pack_frame_hd(buf.last, &hd);
+  buf.last += NGHTTP2_FRAME_HDLEN;
+  nghttp2_put_uint16be(buf.last, sizeof(origin) - 1);
+  buf.last += 2;
+  buf.last = nghttp2_cpymem(buf.last, origin, sizeof(origin) - 1);
+  buf.last = nghttp2_cpymem(buf.last, field_value, sizeof(field_value) - 1);
+
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, buf.pos, nghttp2_buf_len(&buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&buf) == rv);
+  CU_ASSERT(1 == ud.frame_recv_cb_called);
+  CU_ASSERT(NGHTTP2_ALTSVC == ud.recv_frame_hd.type);
+  CU_ASSERT(NGHTTP2_FLAG_NONE == ud.recv_frame_hd.flags);
+  CU_ASSERT(0 == ud.recv_frame_hd.stream_id);
+
+  nghttp2_session_del(session);
+
+  /* size of origin is larger than frame length */
+  nghttp2_buf_reset(&buf);
+
+  nghttp2_session_client_new2(&session, &callbacks, &ud, option);
+
+  nghttp2_frame_hd_init(&hd, 2 + sizeof(origin) - 1 - 1, NGHTTP2_ALTSVC,
+                        NGHTTP2_FLAG_NONE, 0);
+  nghttp2_frame_pack_frame_hd(buf.last, &hd);
+  buf.last += NGHTTP2_FRAME_HDLEN;
+  nghttp2_put_uint16be(buf.last, sizeof(origin) - 1);
+  buf.last += 2;
+  buf.last = nghttp2_cpymem(buf.last, origin, sizeof(origin) - 1 - 1);
+
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, buf.pos, nghttp2_buf_len(&buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&buf) == rv);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+
+  nghttp2_session_del(session);
+
+  /* zero-length value */
+  nghttp2_buf_reset(&buf);
+
+  nghttp2_session_client_new2(&session, &callbacks, &ud, option);
+
+  nghttp2_frame_hd_init(&hd, 2 + sizeof(origin) - 1, NGHTTP2_ALTSVC,
+                        NGHTTP2_FLAG_NONE, 0);
+  nghttp2_frame_pack_frame_hd(buf.last, &hd);
+  buf.last += NGHTTP2_FRAME_HDLEN;
+  nghttp2_put_uint16be(buf.last, sizeof(origin) - 1);
+  buf.last += 2;
+  buf.last = nghttp2_cpymem(buf.last, origin, sizeof(origin) - 1);
+
+  ud.invalid_frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, buf.pos, nghttp2_buf_len(&buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&buf) == rv);
+  CU_ASSERT(1 == ud.invalid_frame_recv_cb_called);
+
+  nghttp2_session_del(session);
+
+  /* non-empty origin to a stream other than 0 */
+  nghttp2_buf_reset(&buf);
+
+  nghttp2_session_client_new2(&session, &callbacks, &ud, option);
+
+  open_sent_stream(session, 1);
+
+  nghttp2_frame_hd_init(&hd, 2 + sizeof(origin) - 1 + sizeof(field_value) - 1,
+                        NGHTTP2_ALTSVC, NGHTTP2_FLAG_NONE, 1);
+  nghttp2_frame_pack_frame_hd(buf.last, &hd);
+  buf.last += NGHTTP2_FRAME_HDLEN;
+  nghttp2_put_uint16be(buf.last, sizeof(origin) - 1);
+  buf.last += 2;
+  buf.last = nghttp2_cpymem(buf.last, origin, sizeof(origin) - 1);
+  buf.last = nghttp2_cpymem(buf.last, field_value, sizeof(field_value) - 1);
+
+  ud.invalid_frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, buf.pos, nghttp2_buf_len(&buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&buf) == rv);
+  CU_ASSERT(1 == ud.invalid_frame_recv_cb_called);
+
+  nghttp2_session_del(session);
+
+  /* empty origin to stream 0 */
+  nghttp2_buf_reset(&buf);
+
+  nghttp2_session_client_new2(&session, &callbacks, &ud, option);
+
+  nghttp2_frame_hd_init(&hd, 2 + sizeof(field_value) - 1, NGHTTP2_ALTSVC,
+                        NGHTTP2_FLAG_NONE, 0);
+  nghttp2_frame_pack_frame_hd(buf.last, &hd);
+  buf.last += NGHTTP2_FRAME_HDLEN;
+  nghttp2_put_uint16be(buf.last, 0);
+  buf.last += 2;
+  buf.last = nghttp2_cpymem(buf.last, field_value, sizeof(field_value) - 1);
+
+  ud.invalid_frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, buf.pos, nghttp2_buf_len(&buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&buf) == rv);
+  CU_ASSERT(1 == ud.invalid_frame_recv_cb_called);
+
+  nghttp2_session_del(session);
+
+  /* send large frame (16KiB) */
+  nghttp2_buf_reset(&buf);
+
+  nghttp2_session_client_new2(&session, &callbacks, &ud, option);
+
+  nghttp2_frame_hd_init(&hd, NGHTTP2_MAX_FRAME_SIZE_MIN, NGHTTP2_ALTSVC,
+                        NGHTTP2_FLAG_NONE, 0);
+  nghttp2_frame_pack_frame_hd(buf.last, &hd);
+  buf.last += NGHTTP2_FRAME_HDLEN;
+  nghttp2_put_uint16be(buf.last, sizeof(origin) - 1);
+  buf.last += 2;
+  buf.last = nghttp2_cpymem(buf.last, origin, sizeof(origin) - 1);
+  memset(buf.last, 0, nghttp2_buf_avail(&buf));
+  buf.last += nghttp2_buf_avail(&buf);
+
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, buf.pos, nghttp2_buf_len(&buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&buf) == rv);
+  CU_ASSERT(1 == ud.frame_recv_cb_called);
+  CU_ASSERT(NGHTTP2_ALTSVC == ud.recv_frame_hd.type);
+  CU_ASSERT(NGHTTP2_MAX_FRAME_SIZE_MIN == ud.recv_frame_hd.length);
+
+  nghttp2_session_del(session);
+
+  /* send too large frame */
+  nghttp2_buf_reset(&buf);
+
+  nghttp2_session_client_new2(&session, &callbacks, &ud, option);
+
+  session->local_settings.max_frame_size = NGHTTP2_MAX_FRAME_SIZE_MIN - 1;
+
+  nghttp2_frame_hd_init(&hd, NGHTTP2_MAX_FRAME_SIZE_MIN + 1, NGHTTP2_ALTSVC,
+                        NGHTTP2_FLAG_NONE, 0);
+  nghttp2_frame_pack_frame_hd(buf.last, &hd);
+  buf.last += NGHTTP2_FRAME_HDLEN;
+  nghttp2_put_uint16be(buf.last, sizeof(origin) - 1);
+  buf.last += 2;
+  buf.last = nghttp2_cpymem(buf.last, origin, sizeof(origin) - 1);
+  memset(buf.last, 0, nghttp2_buf_avail(&buf));
+  buf.last += nghttp2_buf_avail(&buf);
+
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, buf.pos, nghttp2_buf_len(&buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&buf) == rv);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+
+  nghttp2_session_del(session);
+
+  /* received by server */
+  nghttp2_buf_reset(&buf);
+
+  nghttp2_session_server_new2(&session, &callbacks, &ud, option);
+
+  nghttp2_frame_hd_init(&hd, 2 + sizeof(origin) - 1 + sizeof(field_value) - 1,
+                        NGHTTP2_ALTSVC, NGHTTP2_FLAG_NONE, 0);
+  nghttp2_frame_pack_frame_hd(buf.last, &hd);
+  buf.last += NGHTTP2_FRAME_HDLEN;
+  nghttp2_put_uint16be(buf.last, sizeof(origin) - 1);
+  buf.last += 2;
+  buf.last = nghttp2_cpymem(buf.last, origin, sizeof(origin) - 1);
+  buf.last = nghttp2_cpymem(buf.last, field_value, sizeof(field_value) - 1);
+
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, buf.pos, nghttp2_buf_len(&buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&buf) == rv);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+
+  nghttp2_session_del(session);
+
+  nghttp2_buf_free(&buf, mem);
+  nghttp2_option_del(option);
+}
+
+void test_nghttp2_session_recv_origin(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data ud;
+  nghttp2_bufs bufs;
+  ssize_t rv;
+  nghttp2_option *option;
+  nghttp2_extension frame;
+  nghttp2_ext_origin origin;
+  nghttp2_origin_entry ov;
+  static const uint8_t nghttp2[] = "https://nghttp2.org";
+
+  frame_pack_bufs_init(&bufs);
+
+  frame.payload = &origin;
+
+  ov.origin = (uint8_t *)nghttp2;
+  ov.origin_len = sizeof(nghttp2) - 1;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+
+  callbacks.on_frame_recv_callback = on_frame_recv_callback;
+
+  nghttp2_option_new(&option);
+  nghttp2_option_set_builtin_recv_extension_type(option, NGHTTP2_ORIGIN);
+
+  nghttp2_session_client_new2(&session, &callbacks, &ud, option);
+
+  nghttp2_frame_origin_init(&frame, &ov, 1);
+
+  rv = nghttp2_frame_pack_origin(&bufs, &frame);
+
+  CU_ASSERT(0 == rv);
+
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_bufs_len(&bufs));
+
+  CU_ASSERT((ssize_t)nghttp2_bufs_len(&bufs) == rv);
+  CU_ASSERT(1 == ud.frame_recv_cb_called);
+  CU_ASSERT(NGHTTP2_ORIGIN == ud.recv_frame_hd.type);
+  CU_ASSERT(NGHTTP2_FLAG_NONE == ud.recv_frame_hd.flags);
+  CU_ASSERT(0 == ud.recv_frame_hd.stream_id);
+
+  nghttp2_session_del(session);
+  nghttp2_bufs_reset(&bufs);
+
+  /* The length of origin is larger than payload length. */
+  nghttp2_session_client_new2(&session, &callbacks, &ud, option);
+
+  nghttp2_frame_origin_init(&frame, &ov, 1);
+  rv = nghttp2_frame_pack_origin(&bufs, &frame);
+
+  CU_ASSERT(0 == rv);
+
+  nghttp2_put_uint16be(bufs.head->buf.pos + NGHTTP2_FRAME_HDLEN,
+                       (uint16_t)sizeof(nghttp2));
+
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_bufs_len(&bufs));
+
+  CU_ASSERT((ssize_t)nghttp2_bufs_len(&bufs) == rv);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+
+  nghttp2_session_del(session);
+  nghttp2_bufs_reset(&bufs);
+
+  /* A frame should be ignored if it is sent to a stream other than
+     stream 0. */
+  nghttp2_session_client_new2(&session, &callbacks, &ud, option);
+
+  nghttp2_frame_origin_init(&frame, &ov, 1);
+  frame.hd.stream_id = 1;
+  rv = nghttp2_frame_pack_origin(&bufs, &frame);
+
+  CU_ASSERT(0 == rv);
+
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_bufs_len(&bufs));
+
+  CU_ASSERT((ssize_t)nghttp2_bufs_len(&bufs) == rv);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+
+  nghttp2_session_del(session);
+  nghttp2_bufs_reset(&bufs);
+
+  /* A frame should be ignored if the reserved flag is set */
+  nghttp2_session_client_new2(&session, &callbacks, &ud, option);
+
+  nghttp2_frame_origin_init(&frame, &ov, 1);
+  frame.hd.flags = 0xf0;
+  rv = nghttp2_frame_pack_origin(&bufs, &frame);
+
+  CU_ASSERT(0 == rv);
+
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_bufs_len(&bufs));
+
+  CU_ASSERT((ssize_t)nghttp2_bufs_len(&bufs) == rv);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+
+  nghttp2_session_del(session);
+  nghttp2_bufs_reset(&bufs);
+
+  /* A frame should be ignored if it is received by a server. */
+  nghttp2_session_server_new2(&session, &callbacks, &ud, option);
+
+  nghttp2_frame_origin_init(&frame, &ov, 1);
+  rv = nghttp2_frame_pack_origin(&bufs, &frame);
+
+  CU_ASSERT(0 == rv);
+
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_bufs_len(&bufs));
+
+  CU_ASSERT((ssize_t)nghttp2_bufs_len(&bufs) == rv);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+
+  nghttp2_session_del(session);
+  nghttp2_bufs_reset(&bufs);
+
+  /* Receiving empty ORIGIN frame */
+  nghttp2_session_client_new2(&session, &callbacks, &ud, option);
+
+  nghttp2_frame_origin_init(&frame, NULL, 0);
+  rv = nghttp2_frame_pack_origin(&bufs, &frame);
+
+  CU_ASSERT(0 == rv);
+
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_bufs_len(&bufs));
+
+  CU_ASSERT((ssize_t)nghttp2_bufs_len(&bufs) == rv);
+  CU_ASSERT(1 == ud.frame_recv_cb_called);
+  CU_ASSERT(NGHTTP2_ORIGIN == ud.recv_frame_hd.type);
+
+  nghttp2_session_del(session);
+
+  nghttp2_option_del(option);
+  nghttp2_bufs_free(&bufs);
+}
+
+void test_nghttp2_session_recv_priority_update(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data ud;
+  nghttp2_bufs bufs;
+  ssize_t rv;
+  nghttp2_option *option;
+  nghttp2_extension frame;
+  nghttp2_ext_priority_update priority_update;
+  nghttp2_stream *stream;
+  nghttp2_hd_deflater deflater;
+  nghttp2_mem *mem;
+  uint8_t large_field_value[sizeof(session->iframe.raw_sbuf) + 1];
+  nghttp2_outbound_item *item;
+  size_t i;
+  int32_t stream_id;
+  static const uint8_t field_value[] = "u=2,i";
+
+  mem = nghttp2_mem_default();
+
+  memset(large_field_value, ' ', sizeof(large_field_value));
+  memcpy(large_field_value, field_value, sizeof(field_value) - 1);
+
+  frame_pack_bufs_init(&bufs);
+
+  frame.payload = &priority_update;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+
+  callbacks.on_frame_recv_callback = on_frame_recv_callback;
+
+  nghttp2_option_new(&option);
+  nghttp2_option_set_builtin_recv_extension_type(option,
+                                                 NGHTTP2_PRIORITY_UPDATE);
+
+  nghttp2_session_server_new2(&session, &callbacks, &ud, option);
+
+  session->pending_no_rfc7540_priorities = 1;
+
+  nghttp2_frame_priority_update_init(&frame, 1, (uint8_t *)field_value,
+                                     sizeof(field_value) - 1);
+
+  nghttp2_frame_pack_priority_update(&bufs, &frame);
+
+  open_recv_stream(session, 1);
+
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_bufs_len(&bufs));
+
+  CU_ASSERT((ssize_t)nghttp2_bufs_len(&bufs) == rv);
+  CU_ASSERT(1 == ud.frame_recv_cb_called);
+  CU_ASSERT(NGHTTP2_PRIORITY_UPDATE == ud.recv_frame_hd.type);
+  CU_ASSERT(NGHTTP2_FLAG_NONE == ud.recv_frame_hd.flags);
+  CU_ASSERT(0 == ud.recv_frame_hd.stream_id);
+
+  stream = nghttp2_session_get_stream_raw(session, 1);
+
+  CU_ASSERT(2 == nghttp2_extpri_uint8_urgency(stream->extpri));
+  CU_ASSERT(1 == nghttp2_extpri_uint8_inc(stream->extpri));
+
+  nghttp2_session_del(session);
+  nghttp2_bufs_reset(&bufs);
+
+  /* Check that priority which is received in idle state is
+     retained. */
+  nghttp2_session_server_new2(&session, &callbacks, &ud, option);
+
+  session->pending_no_rfc7540_priorities = 1;
+
+  nghttp2_frame_priority_update_init(&frame, 1, (uint8_t *)field_value,
+                                     sizeof(field_value) - 1);
+
+  nghttp2_frame_pack_priority_update(&bufs, &frame);
+
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_bufs_len(&bufs));
+
+  CU_ASSERT((ssize_t)nghttp2_bufs_len(&bufs) == rv);
+  CU_ASSERT(1 == ud.frame_recv_cb_called);
+  CU_ASSERT(NGHTTP2_PRIORITY_UPDATE == ud.recv_frame_hd.type);
+  CU_ASSERT(NGHTTP2_FLAG_NONE == ud.recv_frame_hd.flags);
+  CU_ASSERT(0 == ud.recv_frame_hd.stream_id);
+
+  stream = nghttp2_session_get_stream_raw(session, 1);
+
+  CU_ASSERT(NGHTTP2_STREAM_IDLE == stream->state);
+  CU_ASSERT(2 == nghttp2_extpri_uint8_urgency(stream->extpri));
+  CU_ASSERT(1 == nghttp2_extpri_uint8_inc(stream->extpri));
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+  nghttp2_bufs_reset(&bufs);
+  rv = pack_headers(&bufs, &deflater, 1, NGHTTP2_FLAG_END_HEADERS, reqnv,
+                    ARRLEN(reqnv), mem);
+
+  CU_ASSERT(0 == rv);
+
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_bufs_len(&bufs));
+
+  CU_ASSERT((ssize_t)nghttp2_bufs_len(&bufs) == rv);
+  CU_ASSERT(1 == ud.frame_recv_cb_called);
+  CU_ASSERT(NGHTTP2_HEADERS == ud.recv_frame_hd.type);
+  CU_ASSERT(NGHTTP2_STREAM_OPENING == stream->state);
+  CU_ASSERT(2 == nghttp2_extpri_uint8_urgency(stream->extpri));
+  CU_ASSERT(1 == nghttp2_extpri_uint8_inc(stream->extpri));
+
+  nghttp2_hd_deflate_free(&deflater);
+
+  nghttp2_session_del(session);
+  nghttp2_bufs_reset(&bufs);
+
+  /* PRIORITY_UPDATE with too large field_value is discarded */
+  nghttp2_session_server_new2(&session, &callbacks, &ud, option);
+
+  session->pending_no_rfc7540_priorities = 1;
+
+  nghttp2_frame_priority_update_init(&frame, 1, large_field_value,
+                                     sizeof(large_field_value));
+
+  nghttp2_frame_pack_priority_update(&bufs, &frame);
+
+  open_recv_stream(session, 1);
+
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_bufs_len(&bufs));
+
+  CU_ASSERT((ssize_t)nghttp2_bufs_len(&bufs) == rv);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+
+  stream = nghttp2_session_get_stream_raw(session, 1);
+
+  CU_ASSERT(NGHTTP2_EXTPRI_DEFAULT_URGENCY == stream->extpri);
+
+  nghttp2_session_del(session);
+  nghttp2_bufs_reset(&bufs);
+
+  /* Connection error if client receives PRIORITY_UPDATE. */
+  nghttp2_session_client_new2(&session, &callbacks, &ud, option);
+
+  session->pending_no_rfc7540_priorities = 1;
+
+  nghttp2_frame_priority_update_init(&frame, 1, (uint8_t *)field_value,
+                                     sizeof(field_value) - 1);
+
+  nghttp2_frame_pack_priority_update(&bufs, &frame);
+
+  open_sent_stream(session, 1);
+
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_bufs_len(&bufs));
+
+  CU_ASSERT((ssize_t)nghttp2_bufs_len(&bufs) == rv);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_GOAWAY == item->frame.hd.type);
+  CU_ASSERT(NGHTTP2_PROTOCOL_ERROR == item->frame.goaway.error_code);
+
+  nghttp2_session_del(session);
+  nghttp2_bufs_reset(&bufs);
+
+  /* The number of idle streams exceeds the maximum. */
+  nghttp2_session_server_new2(&session, &callbacks, &ud, option);
+
+  session->pending_no_rfc7540_priorities = 1;
+  session->local_settings.max_concurrent_streams = 100;
+
+  for (i = 0; i < 101; ++i) {
+    stream_id = (int32_t)(i * 2 + 1);
+    nghttp2_frame_priority_update_init(
+        &frame, stream_id, (uint8_t *)field_value, sizeof(field_value) - 1);
+
+    nghttp2_frame_pack_priority_update(&bufs, &frame);
+
+    ud.frame_recv_cb_called = 0;
+    rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                  nghttp2_bufs_len(&bufs));
+
+    if (i < 100) {
+      CU_ASSERT((ssize_t)nghttp2_bufs_len(&bufs) == rv);
+      CU_ASSERT(1 == ud.frame_recv_cb_called);
+      CU_ASSERT(NGHTTP2_PRIORITY_UPDATE == ud.recv_frame_hd.type);
+    } else {
+      CU_ASSERT(0 == ud.frame_recv_cb_called);
+    }
+
+    nghttp2_bufs_reset(&bufs);
+  }
+
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_GOAWAY == item->frame.hd.type);
+  CU_ASSERT(NGHTTP2_PROTOCOL_ERROR == item->frame.goaway.error_code);
+
+  nghttp2_session_del(session);
+  nghttp2_option_del(option);
+  nghttp2_bufs_free(&bufs);
+}
+
+void test_nghttp2_session_continue(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data user_data;
+  const nghttp2_nv nv1[] = {MAKE_NV(":method", "GET"), MAKE_NV(":path", "/")};
+  const nghttp2_nv nv2[] = {MAKE_NV("user-agent", "nghttp2/1.0.0"),
+                            MAKE_NV("alpha", "bravo")};
+  nghttp2_bufs bufs;
+  nghttp2_buf *buf;
+  size_t framelen1, framelen2;
+  ssize_t rv;
+  uint8_t buffer[4096];
+  nghttp2_buf databuf;
+  nghttp2_frame frame;
+  nghttp2_nv *nva;
+  size_t nvlen;
+  const nghttp2_frame *recv_frame;
+  nghttp2_frame_hd data_hd;
+  nghttp2_hd_deflater deflater;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+  nghttp2_buf_wrap_init(&databuf, buffer, sizeof(buffer));
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+  callbacks.on_frame_recv_callback = on_frame_recv_callback;
+  callbacks.on_data_chunk_recv_callback = pause_on_data_chunk_recv_callback;
+  callbacks.on_header_callback = pause_on_header_callback;
+  callbacks.on_begin_headers_callback = on_begin_headers_callback;
+
+  nghttp2_session_server_new(&session, &callbacks, &user_data);
+  /* disable strict HTTP layering checks */
+  session->opt_flags |= NGHTTP2_OPTMASK_NO_HTTP_MESSAGING;
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  /* Make 2 HEADERS frames */
+  nvlen = ARRLEN(nv1);
+  nghttp2_nv_array_copy(&nva, nv1, nvlen, mem);
+  nghttp2_frame_headers_init(&frame.headers, NGHTTP2_FLAG_END_HEADERS, 1,
+                             NGHTTP2_HCAT_HEADERS, NULL, nva, nvlen);
+  rv = nghttp2_frame_pack_headers(&bufs, &frame.headers, &deflater);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(nghttp2_bufs_len(&bufs) > 0);
+
+  nghttp2_frame_headers_free(&frame.headers, mem);
+
+  buf = &bufs.head->buf;
+  assert(nghttp2_bufs_len(&bufs) == nghttp2_buf_len(buf));
+
+  framelen1 = nghttp2_buf_len(buf);
+  databuf.last = nghttp2_cpymem(databuf.last, buf->pos, nghttp2_buf_len(buf));
+
+  nvlen = ARRLEN(nv2);
+  nghttp2_nv_array_copy(&nva, nv2, nvlen, mem);
+  nghttp2_frame_headers_init(&frame.headers, NGHTTP2_FLAG_END_HEADERS, 3,
+                             NGHTTP2_HCAT_HEADERS, NULL, nva, nvlen);
+  nghttp2_bufs_reset(&bufs);
+  rv = nghttp2_frame_pack_headers(&bufs, &frame.headers, &deflater);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(nghttp2_bufs_len(&bufs) > 0);
+
+  nghttp2_frame_headers_free(&frame.headers, mem);
+
+  assert(nghttp2_bufs_len(&bufs) == nghttp2_buf_len(buf));
+
+  framelen2 = nghttp2_buf_len(buf);
+  databuf.last = nghttp2_cpymem(databuf.last, buf->pos, nghttp2_buf_len(buf));
+
+  /* Receive 1st HEADERS and pause */
+  user_data.begin_headers_cb_called = 0;
+  user_data.header_cb_called = 0;
+  rv =
+      nghttp2_session_mem_recv(session, databuf.pos, nghttp2_buf_len(&databuf));
+
+  CU_ASSERT(rv >= 0);
+  databuf.pos += rv;
+
+  recv_frame = user_data.frame;
+  CU_ASSERT(NGHTTP2_HEADERS == recv_frame->hd.type);
+  CU_ASSERT(framelen1 - NGHTTP2_FRAME_HDLEN == recv_frame->hd.length);
+
+  CU_ASSERT(1 == user_data.begin_headers_cb_called);
+  CU_ASSERT(1 == user_data.header_cb_called);
+
+  CU_ASSERT(nghttp2_nv_equal(&nv1[0], &user_data.nv));
+
+  /* get 2nd header field */
+  user_data.begin_headers_cb_called = 0;
+  user_data.header_cb_called = 0;
+  rv =
+      nghttp2_session_mem_recv(session, databuf.pos, nghttp2_buf_len(&databuf));
+
+  CU_ASSERT(rv >= 0);
+  databuf.pos += rv;
+
+  CU_ASSERT(0 == user_data.begin_headers_cb_called);
+  CU_ASSERT(1 == user_data.header_cb_called);
+
+  CU_ASSERT(nghttp2_nv_equal(&nv1[1], &user_data.nv));
+
+  /* will call end_headers_callback and receive 2nd HEADERS and pause */
+  user_data.begin_headers_cb_called = 0;
+  user_data.header_cb_called = 0;
+  rv =
+      nghttp2_session_mem_recv(session, databuf.pos, nghttp2_buf_len(&databuf));
+
+  CU_ASSERT(rv >= 0);
+  databuf.pos += rv;
+
+  recv_frame = user_data.frame;
+  CU_ASSERT(NGHTTP2_HEADERS == recv_frame->hd.type);
+  CU_ASSERT(framelen2 - NGHTTP2_FRAME_HDLEN == recv_frame->hd.length);
+
+  CU_ASSERT(1 == user_data.begin_headers_cb_called);
+  CU_ASSERT(1 == user_data.header_cb_called);
+
+  CU_ASSERT(nghttp2_nv_equal(&nv2[0], &user_data.nv));
+
+  /* get 2nd header field */
+  user_data.begin_headers_cb_called = 0;
+  user_data.header_cb_called = 0;
+  rv =
+      nghttp2_session_mem_recv(session, databuf.pos, nghttp2_buf_len(&databuf));
+
+  CU_ASSERT(rv >= 0);
+  databuf.pos += rv;
+
+  CU_ASSERT(0 == user_data.begin_headers_cb_called);
+  CU_ASSERT(1 == user_data.header_cb_called);
+
+  CU_ASSERT(nghttp2_nv_equal(&nv2[1], &user_data.nv));
+
+  /* No input data, frame_recv_callback is called */
+  user_data.begin_headers_cb_called = 0;
+  user_data.header_cb_called = 0;
+  user_data.frame_recv_cb_called = 0;
+  rv =
+      nghttp2_session_mem_recv(session, databuf.pos, nghttp2_buf_len(&databuf));
+
+  CU_ASSERT(rv >= 0);
+  databuf.pos += rv;
+
+  CU_ASSERT(0 == user_data.begin_headers_cb_called);
+  CU_ASSERT(0 == user_data.header_cb_called);
+  CU_ASSERT(1 == user_data.frame_recv_cb_called);
+
+  /* Receive DATA */
+  nghttp2_frame_hd_init(&data_hd, 16, NGHTTP2_DATA, NGHTTP2_FLAG_NONE, 1);
+
+  nghttp2_buf_reset(&databuf);
+  nghttp2_frame_pack_frame_hd(databuf.pos, &data_hd);
+
+  /* Intentionally specify larger buffer size to see pause is kicked
+     in. */
+  databuf.last = databuf.end;
+
+  user_data.frame_recv_cb_called = 0;
+  rv =
+      nghttp2_session_mem_recv(session, databuf.pos, nghttp2_buf_len(&databuf));
+
+  CU_ASSERT(16 + NGHTTP2_FRAME_HDLEN == rv);
+  CU_ASSERT(0 == user_data.frame_recv_cb_called);
+
+  /* Next nghttp2_session_mem_recv invokes on_frame_recv_callback and
+     pause again in on_data_chunk_recv_callback since we pass same
+     DATA frame. */
+  user_data.frame_recv_cb_called = 0;
+  rv =
+      nghttp2_session_mem_recv(session, databuf.pos, nghttp2_buf_len(&databuf));
+  CU_ASSERT(16 + NGHTTP2_FRAME_HDLEN == rv);
+  CU_ASSERT(1 == user_data.frame_recv_cb_called);
+
+  /* And finally call on_frame_recv_callback with 0 size input */
+  user_data.frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, NULL, 0);
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(1 == user_data.frame_recv_cb_called);
+
+  nghttp2_bufs_free(&bufs);
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_add_frame(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  accumulator acc;
+  my_user_data user_data;
+  nghttp2_outbound_item *item;
+  nghttp2_frame *frame;
+  nghttp2_nv *nva;
+  size_t nvlen;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = accumulator_send_callback;
+
+  acc.length = 0;
+  user_data.acc = &acc;
+
+  CU_ASSERT(0 == nghttp2_session_client_new(&session, &callbacks, &user_data));
+
+  item = mem->malloc(sizeof(nghttp2_outbound_item), NULL);
+
+  nghttp2_outbound_item_init(item);
+
+  frame = &item->frame;
+
+  nvlen = ARRLEN(reqnv);
+  nghttp2_nv_array_copy(&nva, reqnv, nvlen, mem);
+
+  nghttp2_frame_headers_init(
+      &frame->headers, NGHTTP2_FLAG_END_HEADERS | NGHTTP2_FLAG_PRIORITY,
+      (int32_t)session->next_stream_id, NGHTTP2_HCAT_REQUEST, NULL, nva, nvlen);
+
+  session->next_stream_id += 2;
+
+  CU_ASSERT(0 == nghttp2_session_add_item(session, item));
+  CU_ASSERT(NULL != nghttp2_outbound_queue_top(&session->ob_syn));
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(NGHTTP2_HEADERS == acc.buf[3]);
+  CU_ASSERT((NGHTTP2_FLAG_END_HEADERS | NGHTTP2_FLAG_PRIORITY) == acc.buf[4]);
+  /* check stream id */
+  CU_ASSERT(1 == nghttp2_get_uint32(&acc.buf[5]));
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_on_request_headers_received(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data user_data;
+  nghttp2_frame frame;
+  nghttp2_stream *stream;
+  int32_t stream_id = 1;
+  nghttp2_nv malformed_nva[] = {MAKE_NV(":path", "\x01")};
+  nghttp2_nv *nva;
+  size_t nvlen;
+  nghttp2_priority_spec pri_spec;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.on_begin_headers_callback = on_begin_headers_callback;
+  callbacks.on_invalid_frame_recv_callback = on_invalid_frame_recv_callback;
+
+  nghttp2_session_server_new(&session, &callbacks, &user_data);
+
+  nghttp2_priority_spec_init(&pri_spec, 0, 255, 0);
+
+  nghttp2_frame_headers_init(
+      &frame.headers, NGHTTP2_FLAG_END_HEADERS | NGHTTP2_FLAG_PRIORITY,
+      stream_id, NGHTTP2_HCAT_REQUEST, &pri_spec, NULL, 0);
+
+  user_data.begin_headers_cb_called = 0;
+  user_data.invalid_frame_recv_cb_called = 0;
+
+  CU_ASSERT(0 == nghttp2_session_on_request_headers_received(session, &frame));
+  CU_ASSERT(1 == user_data.begin_headers_cb_called);
+  stream = nghttp2_session_get_stream(session, stream_id);
+  CU_ASSERT(NGHTTP2_STREAM_OPENING == stream->state);
+  CU_ASSERT(255 == stream->weight);
+
+  nghttp2_frame_headers_free(&frame.headers, mem);
+
+  /* More than un-ACKed max concurrent streams leads REFUSED_STREAM */
+  session->pending_local_max_concurrent_stream = 1;
+  nghttp2_frame_headers_init(&frame.headers,
+                             NGHTTP2_FLAG_END_HEADERS | NGHTTP2_FLAG_PRIORITY,
+                             3, NGHTTP2_HCAT_HEADERS, NULL, NULL, 0);
+  user_data.invalid_frame_recv_cb_called = 0;
+  CU_ASSERT(NGHTTP2_ERR_IGN_HEADER_BLOCK ==
+            nghttp2_session_on_request_headers_received(session, &frame));
+  CU_ASSERT(1 == user_data.invalid_frame_recv_cb_called);
+  CU_ASSERT(0 == (session->goaway_flags & NGHTTP2_GOAWAY_TERM_ON_SEND));
+
+  nghttp2_frame_headers_free(&frame.headers, mem);
+  session->local_settings.max_concurrent_streams =
+      NGHTTP2_DEFAULT_MAX_CONCURRENT_STREAMS;
+
+  /* Stream ID less than or equal to the previously received request
+     HEADERS is just ignored due to race condition */
+  nghttp2_frame_headers_init(&frame.headers,
+                             NGHTTP2_FLAG_END_HEADERS | NGHTTP2_FLAG_PRIORITY,
+                             3, NGHTTP2_HCAT_HEADERS, NULL, NULL, 0);
+  user_data.invalid_frame_recv_cb_called = 0;
+  CU_ASSERT(NGHTTP2_ERR_IGN_HEADER_BLOCK ==
+            nghttp2_session_on_request_headers_received(session, &frame));
+  CU_ASSERT(0 == user_data.invalid_frame_recv_cb_called);
+  CU_ASSERT(0 == (session->goaway_flags & NGHTTP2_GOAWAY_TERM_ON_SEND));
+
+  nghttp2_frame_headers_free(&frame.headers, mem);
+
+  /* Stream ID is our side and it is idle stream ID, then treat it as
+     connection error */
+  nghttp2_frame_headers_init(&frame.headers,
+                             NGHTTP2_FLAG_END_HEADERS | NGHTTP2_FLAG_PRIORITY,
+                             2, NGHTTP2_HCAT_HEADERS, NULL, NULL, 0);
+  user_data.invalid_frame_recv_cb_called = 0;
+  CU_ASSERT(NGHTTP2_ERR_IGN_HEADER_BLOCK ==
+            nghttp2_session_on_request_headers_received(session, &frame));
+  CU_ASSERT(1 == user_data.invalid_frame_recv_cb_called);
+  CU_ASSERT(session->goaway_flags & NGHTTP2_GOAWAY_TERM_ON_SEND);
+
+  nghttp2_frame_headers_free(&frame.headers, mem);
+
+  nghttp2_session_del(session);
+
+  /* Check malformed headers. The library accept it. */
+  nghttp2_session_server_new(&session, &callbacks, &user_data);
+
+  nvlen = ARRLEN(malformed_nva);
+  nghttp2_nv_array_copy(&nva, malformed_nva, nvlen, mem);
+  nghttp2_frame_headers_init(&frame.headers,
+                             NGHTTP2_FLAG_END_HEADERS | NGHTTP2_FLAG_PRIORITY,
+                             1, NGHTTP2_HCAT_HEADERS, NULL, nva, nvlen);
+  user_data.begin_headers_cb_called = 0;
+  user_data.invalid_frame_recv_cb_called = 0;
+  CU_ASSERT(0 == nghttp2_session_on_request_headers_received(session, &frame));
+  CU_ASSERT(1 == user_data.begin_headers_cb_called);
+  CU_ASSERT(0 == user_data.invalid_frame_recv_cb_called);
+
+  nghttp2_frame_headers_free(&frame.headers, mem);
+
+  nghttp2_session_del(session);
+
+  /* Check client side */
+  nghttp2_session_client_new(&session, &callbacks, &user_data);
+
+  /* Receiving peer's idle stream ID is subject to connection error */
+  nghttp2_frame_headers_init(&frame.headers, NGHTTP2_FLAG_END_HEADERS, 2,
+                             NGHTTP2_HCAT_REQUEST, NULL, NULL, 0);
+
+  user_data.invalid_frame_recv_cb_called = 0;
+  CU_ASSERT(NGHTTP2_ERR_IGN_HEADER_BLOCK ==
+            nghttp2_session_on_request_headers_received(session, &frame));
+  CU_ASSERT(1 == user_data.invalid_frame_recv_cb_called);
+  CU_ASSERT(session->goaway_flags & NGHTTP2_GOAWAY_TERM_ON_SEND);
+
+  nghttp2_frame_headers_free(&frame.headers, mem);
+
+  nghttp2_session_del(session);
+
+  nghttp2_session_client_new(&session, &callbacks, &user_data);
+
+  /* Receiving our's idle stream ID is subject to connection error */
+  nghttp2_frame_headers_init(&frame.headers, NGHTTP2_FLAG_END_HEADERS, 1,
+                             NGHTTP2_HCAT_REQUEST, NULL, NULL, 0);
+
+  user_data.invalid_frame_recv_cb_called = 0;
+  CU_ASSERT(NGHTTP2_ERR_IGN_HEADER_BLOCK ==
+            nghttp2_session_on_request_headers_received(session, &frame));
+  CU_ASSERT(1 == user_data.invalid_frame_recv_cb_called);
+  CU_ASSERT(session->goaway_flags & NGHTTP2_GOAWAY_TERM_ON_SEND);
+
+  nghttp2_frame_headers_free(&frame.headers, mem);
+
+  nghttp2_session_del(session);
+
+  nghttp2_session_client_new(&session, &callbacks, &user_data);
+
+  session->next_stream_id = 5;
+  session->last_sent_stream_id = 3;
+
+  /* Stream ID which is not idle and not in stream map is just
+     ignored */
+  nghttp2_frame_headers_init(&frame.headers, NGHTTP2_FLAG_END_HEADERS, 3,
+                             NGHTTP2_HCAT_REQUEST, NULL, NULL, 0);
+
+  user_data.invalid_frame_recv_cb_called = 0;
+  CU_ASSERT(NGHTTP2_ERR_IGN_HEADER_BLOCK ==
+            nghttp2_session_on_request_headers_received(session, &frame));
+  CU_ASSERT(0 == user_data.invalid_frame_recv_cb_called);
+  CU_ASSERT(0 == (session->goaway_flags & NGHTTP2_GOAWAY_TERM_ON_SEND));
+
+  nghttp2_frame_headers_free(&frame.headers, mem);
+
+  nghttp2_session_del(session);
+
+  nghttp2_session_server_new(&session, &callbacks, &user_data);
+
+  /* Stream ID which is equal to local_last_stream_id is ok. */
+  session->local_last_stream_id = 3;
+
+  nghttp2_frame_headers_init(&frame.headers, NGHTTP2_FLAG_END_HEADERS, 3,
+                             NGHTTP2_HCAT_REQUEST, NULL, NULL, 0);
+
+  CU_ASSERT(0 == nghttp2_session_on_request_headers_received(session, &frame));
+
+  nghttp2_frame_headers_free(&frame.headers, mem);
+
+  /* If GOAWAY has been sent, new stream is ignored */
+  nghttp2_frame_headers_init(&frame.headers, NGHTTP2_FLAG_END_HEADERS, 5,
+                             NGHTTP2_HCAT_REQUEST, NULL, NULL, 0);
+
+  session->goaway_flags |= NGHTTP2_GOAWAY_SENT;
+  user_data.invalid_frame_recv_cb_called = 0;
+  CU_ASSERT(NGHTTP2_ERR_IGN_HEADER_BLOCK ==
+            nghttp2_session_on_request_headers_received(session, &frame));
+  CU_ASSERT(0 == user_data.invalid_frame_recv_cb_called);
+  CU_ASSERT(0 == (session->goaway_flags & NGHTTP2_GOAWAY_TERM_ON_SEND));
+
+  nghttp2_frame_headers_free(&frame.headers, mem);
+
+  nghttp2_session_del(session);
+
+  nghttp2_session_server_new(&session, &callbacks, &user_data);
+
+  /* HEADERS to closed stream */
+  stream = open_recv_stream(session, 1);
+  nghttp2_stream_shutdown(stream, NGHTTP2_SHUT_RD);
+  nghttp2_session_close_stream(session, 1, NGHTTP2_NO_ERROR);
+
+  nghttp2_frame_headers_init(&frame.headers, NGHTTP2_FLAG_END_HEADERS, 1,
+                             NGHTTP2_HCAT_REQUEST, NULL, NULL, 0);
+
+  CU_ASSERT(NGHTTP2_ERR_IGN_HEADER_BLOCK ==
+            nghttp2_session_on_request_headers_received(session, &frame));
+  CU_ASSERT(session->goaway_flags & NGHTTP2_GOAWAY_TERM_ON_SEND);
+
+  nghttp2_frame_headers_free(&frame.headers, mem);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_on_response_headers_received(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data user_data;
+  nghttp2_frame frame;
+  nghttp2_stream *stream;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.on_begin_headers_callback = on_begin_headers_callback;
+  callbacks.on_invalid_frame_recv_callback = on_invalid_frame_recv_callback;
+
+  nghttp2_session_client_new(&session, &callbacks, &user_data);
+  stream = open_sent_stream2(session, 1, NGHTTP2_STREAM_OPENING);
+  nghttp2_frame_headers_init(&frame.headers, NGHTTP2_FLAG_END_HEADERS, 1,
+                             NGHTTP2_HCAT_HEADERS, NULL, NULL, 0);
+
+  user_data.begin_headers_cb_called = 0;
+  user_data.invalid_frame_recv_cb_called = 0;
+
+  CU_ASSERT(0 == nghttp2_session_on_response_headers_received(session, &frame,
+                                                              stream));
+  CU_ASSERT(1 == user_data.begin_headers_cb_called);
+  CU_ASSERT(NGHTTP2_STREAM_OPENED == stream->state);
+
+  nghttp2_frame_headers_free(&frame.headers, mem);
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_on_headers_received(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data user_data;
+  nghttp2_frame frame;
+  nghttp2_stream *stream;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.on_begin_headers_callback = on_begin_headers_callback;
+  callbacks.on_invalid_frame_recv_callback = on_invalid_frame_recv_callback;
+
+  nghttp2_session_client_new(&session, &callbacks, &user_data);
+  stream = open_sent_stream2(session, 1, NGHTTP2_STREAM_OPENED);
+  nghttp2_stream_shutdown(stream, NGHTTP2_SHUT_WR);
+  nghttp2_frame_headers_init(&frame.headers, NGHTTP2_FLAG_END_HEADERS, 1,
+                             NGHTTP2_HCAT_HEADERS, NULL, NULL, 0);
+
+  user_data.begin_headers_cb_called = 0;
+  user_data.invalid_frame_recv_cb_called = 0;
+
+  CU_ASSERT(0 == nghttp2_session_on_headers_received(session, &frame, stream));
+  CU_ASSERT(1 == user_data.begin_headers_cb_called);
+  CU_ASSERT(NGHTTP2_STREAM_OPENED == stream->state);
+
+  /* stream closed */
+  frame.hd.flags |= NGHTTP2_FLAG_END_STREAM;
+
+  CU_ASSERT(0 == nghttp2_session_on_headers_received(session, &frame, stream));
+  CU_ASSERT(2 == user_data.begin_headers_cb_called);
+
+  /* Check to see when NGHTTP2_STREAM_CLOSING, incoming HEADERS is
+     discarded. */
+  stream = open_sent_stream2(session, 3, NGHTTP2_STREAM_CLOSING);
+  frame.hd.stream_id = 3;
+  frame.hd.flags = NGHTTP2_FLAG_END_HEADERS;
+  CU_ASSERT(NGHTTP2_ERR_IGN_HEADER_BLOCK ==
+            nghttp2_session_on_headers_received(session, &frame, stream));
+  /* See no counters are updated */
+  CU_ASSERT(2 == user_data.begin_headers_cb_called);
+  CU_ASSERT(0 == user_data.invalid_frame_recv_cb_called);
+
+  /* Server initiated stream */
+  stream = open_recv_stream(session, 2);
+
+  frame.hd.flags = NGHTTP2_FLAG_END_HEADERS | NGHTTP2_FLAG_END_STREAM;
+  frame.hd.stream_id = 2;
+
+  CU_ASSERT(0 == nghttp2_session_on_headers_received(session, &frame, stream));
+  CU_ASSERT(3 == user_data.begin_headers_cb_called);
+  CU_ASSERT(NGHTTP2_STREAM_OPENED == stream->state);
+
+  nghttp2_stream_shutdown(stream, NGHTTP2_SHUT_RD);
+
+  /* Further reception of HEADERS is subject to stream error */
+  CU_ASSERT(NGHTTP2_ERR_IGN_HEADER_BLOCK ==
+            nghttp2_session_on_headers_received(session, &frame, stream));
+  CU_ASSERT(1 == user_data.invalid_frame_recv_cb_called);
+
+  nghttp2_frame_headers_free(&frame.headers, mem);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_on_push_response_headers_received(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data user_data;
+  nghttp2_frame frame;
+  nghttp2_stream *stream;
+  nghttp2_outbound_item *item;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+  callbacks.on_begin_headers_callback = on_begin_headers_callback;
+  callbacks.on_invalid_frame_recv_callback = on_invalid_frame_recv_callback;
+
+  nghttp2_session_client_new(&session, &callbacks, &user_data);
+  stream = open_recv_stream2(session, 2, NGHTTP2_STREAM_RESERVED);
+  nghttp2_frame_headers_init(&frame.headers, NGHTTP2_FLAG_END_HEADERS, 2,
+                             NGHTTP2_HCAT_HEADERS, NULL, NULL, 0);
+  /* nghttp2_session_on_push_response_headers_received assumes
+     stream's state is NGHTTP2_STREAM_RESERVED and session->server is
+     0. */
+
+  user_data.begin_headers_cb_called = 0;
+  user_data.invalid_frame_recv_cb_called = 0;
+
+  CU_ASSERT(1 == session->num_incoming_reserved_streams);
+  CU_ASSERT(0 == nghttp2_session_on_push_response_headers_received(
+                     session, &frame, stream));
+  CU_ASSERT(1 == user_data.begin_headers_cb_called);
+  CU_ASSERT(0 == session->num_incoming_reserved_streams);
+  CU_ASSERT(NGHTTP2_STREAM_OPENED == stream->state);
+  CU_ASSERT(1 == session->num_incoming_streams);
+  CU_ASSERT(0 == (stream->flags & NGHTTP2_STREAM_FLAG_PUSH));
+
+  /* If un-ACKed max concurrent streams limit is exceeded,
+     RST_STREAMed */
+  session->pending_local_max_concurrent_stream = 1;
+  stream = open_recv_stream2(session, 4, NGHTTP2_STREAM_RESERVED);
+  frame.hd.stream_id = 4;
+  CU_ASSERT(NGHTTP2_ERR_IGN_HEADER_BLOCK ==
+            nghttp2_session_on_push_response_headers_received(session, &frame,
+                                                              stream));
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_RST_STREAM == item->frame.hd.type);
+  CU_ASSERT(NGHTTP2_REFUSED_STREAM == item->frame.rst_stream.error_code);
+  CU_ASSERT(1 == session->num_incoming_streams);
+  CU_ASSERT(1 == session->num_incoming_reserved_streams);
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(1 == session->num_incoming_streams);
+
+  /* If ACKed max concurrent streams limit is exceeded, GOAWAY is
+     issued */
+  session->local_settings.max_concurrent_streams = 1;
+
+  stream = open_recv_stream2(session, 6, NGHTTP2_STREAM_RESERVED);
+  frame.hd.stream_id = 6;
+
+  CU_ASSERT(NGHTTP2_ERR_IGN_HEADER_BLOCK ==
+            nghttp2_session_on_push_response_headers_received(session, &frame,
+                                                              stream));
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_GOAWAY == item->frame.hd.type);
+  CU_ASSERT(NGHTTP2_PROTOCOL_ERROR == item->frame.goaway.error_code);
+  CU_ASSERT(1 == session->num_incoming_streams);
+  CU_ASSERT(1 == session->num_incoming_reserved_streams);
+
+  nghttp2_frame_headers_free(&frame.headers, mem);
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_on_priority_received(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data user_data;
+  nghttp2_frame frame;
+  nghttp2_stream *stream, *dep_stream;
+  nghttp2_priority_spec pri_spec;
+  nghttp2_outbound_item *item;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.on_frame_recv_callback = on_frame_recv_callback;
+  callbacks.on_invalid_frame_recv_callback = on_invalid_frame_recv_callback;
+
+  nghttp2_session_server_new(&session, &callbacks, &user_data);
+  stream = open_recv_stream(session, 1);
+
+  nghttp2_priority_spec_init(&pri_spec, 0, 2, 0);
+
+  nghttp2_frame_priority_init(&frame.priority, 1, &pri_spec);
+
+  /* depend on stream 0 */
+  CU_ASSERT(0 == nghttp2_session_on_priority_received(session, &frame));
+
+  CU_ASSERT(2 == stream->weight);
+
+  stream = open_sent_stream(session, 2);
+  dep_stream = open_recv_stream(session, 3);
+
+  frame.hd.stream_id = 2;
+
+  /* using dependency stream */
+  nghttp2_priority_spec_init(&frame.priority.pri_spec, 3, 1, 0);
+
+  CU_ASSERT(0 == nghttp2_session_on_priority_received(session, &frame));
+  CU_ASSERT(dep_stream == stream->dep_prev);
+
+  /* PRIORITY against idle stream */
+
+  frame.hd.stream_id = 100;
+
+  CU_ASSERT(0 == nghttp2_session_on_priority_received(session, &frame));
+
+  stream = nghttp2_session_get_stream_raw(session, frame.hd.stream_id);
+
+  CU_ASSERT(NGHTTP2_STREAM_IDLE == stream->state);
+  CU_ASSERT(dep_stream == stream->dep_prev);
+
+  nghttp2_frame_priority_free(&frame.priority);
+  nghttp2_session_del(session);
+
+  /* Check dep_stream_id == stream_id case */
+  nghttp2_session_server_new(&session, &callbacks, &user_data);
+  open_recv_stream(session, 1);
+
+  nghttp2_priority_spec_init(&pri_spec, 1, 0, 0);
+
+  nghttp2_frame_priority_init(&frame.priority, 1, &pri_spec);
+
+  CU_ASSERT(0 == nghttp2_session_on_priority_received(session, &frame));
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(NGHTTP2_GOAWAY == item->frame.hd.type);
+
+  nghttp2_frame_priority_free(&frame.priority);
+  nghttp2_session_del(session);
+
+  /* Check again dep_stream_id == stream_id, and stream_id is idle */
+  nghttp2_session_server_new(&session, &callbacks, &user_data);
+
+  nghttp2_priority_spec_init(&pri_spec, 1, 16, 0);
+
+  nghttp2_frame_priority_init(&frame.priority, 1, &pri_spec);
+
+  CU_ASSERT(0 == nghttp2_session_on_priority_received(session, &frame));
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(NGHTTP2_GOAWAY == item->frame.hd.type);
+
+  nghttp2_frame_priority_free(&frame.priority);
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_on_rst_stream_received(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data user_data;
+  nghttp2_frame frame;
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  nghttp2_session_server_new(&session, &callbacks, &user_data);
+  open_recv_stream(session, 1);
+
+  nghttp2_frame_rst_stream_init(&frame.rst_stream, 1, NGHTTP2_PROTOCOL_ERROR);
+
+  CU_ASSERT(0 == nghttp2_session_on_rst_stream_received(session, &frame));
+  CU_ASSERT(NULL == nghttp2_session_get_stream(session, 1));
+
+  nghttp2_frame_rst_stream_free(&frame.rst_stream);
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_on_settings_received(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data user_data;
+  nghttp2_stream *stream1, *stream2;
+  nghttp2_frame frame;
+  const size_t niv = 5;
+  nghttp2_settings_entry iv[255];
+  nghttp2_outbound_item *item;
+  nghttp2_nv nv = MAKE_NV(":authority", "example.org");
+  nghttp2_mem *mem;
+  nghttp2_option *option;
+  uint8_t data[2048];
+  nghttp2_frame_hd hd;
+  int rv;
+  ssize_t nread;
+  nghttp2_stream *stream;
+
+  mem = nghttp2_mem_default();
+
+  iv[0].settings_id = NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS;
+  iv[0].value = 50;
+
+  iv[1].settings_id = NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS;
+  iv[1].value = 1000000009;
+
+  iv[2].settings_id = NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE;
+  iv[2].value = 64 * 1024;
+
+  iv[3].settings_id = NGHTTP2_SETTINGS_HEADER_TABLE_SIZE;
+  iv[3].value = 1024;
+
+  iv[4].settings_id = NGHTTP2_SETTINGS_ENABLE_PUSH;
+  iv[4].value = 0;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  nghttp2_session_client_new(&session, &callbacks, &user_data);
+  session->remote_settings.initial_window_size = 16 * 1024;
+
+  stream1 = open_sent_stream(session, 1);
+  stream2 = open_recv_stream(session, 2);
+
+  /* Set window size for each streams and will see how settings
+     updates these values */
+  stream1->remote_window_size = 16 * 1024;
+  stream2->remote_window_size = -48 * 1024;
+
+  nghttp2_frame_settings_init(&frame.settings, NGHTTP2_FLAG_NONE,
+                              dup_iv(iv, niv), niv);
+
+  CU_ASSERT(0 == nghttp2_session_on_settings_received(session, &frame, 0));
+  CU_ASSERT(1000000009 == session->remote_settings.max_concurrent_streams);
+  CU_ASSERT(64 * 1024 == session->remote_settings.initial_window_size);
+  CU_ASSERT(1024 == session->remote_settings.header_table_size);
+  CU_ASSERT(0 == session->remote_settings.enable_push);
+
+  CU_ASSERT(64 * 1024 == stream1->remote_window_size);
+  CU_ASSERT(0 == stream2->remote_window_size);
+
+  frame.settings.iv[2].value = 16 * 1024;
+
+  CU_ASSERT(0 == nghttp2_session_on_settings_received(session, &frame, 0));
+
+  CU_ASSERT(16 * 1024 == stream1->remote_window_size);
+  CU_ASSERT(-48 * 1024 == stream2->remote_window_size);
+
+  CU_ASSERT(16 * 1024 == nghttp2_session_get_stream_remote_window_size(
+                             session, stream1->stream_id));
+  CU_ASSERT(0 == nghttp2_session_get_stream_remote_window_size(
+                     session, stream2->stream_id));
+
+  nghttp2_frame_settings_free(&frame.settings, mem);
+
+  nghttp2_session_del(session);
+
+  /* Check ACK with niv > 0 */
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+  nghttp2_frame_settings_init(&frame.settings, NGHTTP2_FLAG_ACK, dup_iv(iv, 1),
+                              1);
+  CU_ASSERT(0 == nghttp2_session_on_settings_received(session, &frame, 0));
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(item != NULL);
+  CU_ASSERT(NGHTTP2_GOAWAY == item->frame.hd.type);
+
+  nghttp2_frame_settings_free(&frame.settings, mem);
+  nghttp2_session_del(session);
+
+  /* Check ACK against no inflight SETTINGS */
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+  nghttp2_frame_settings_init(&frame.settings, NGHTTP2_FLAG_ACK, NULL, 0);
+
+  CU_ASSERT(0 == nghttp2_session_on_settings_received(session, &frame, 0));
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(item != NULL);
+  CU_ASSERT(NGHTTP2_GOAWAY == item->frame.hd.type);
+
+  nghttp2_frame_settings_free(&frame.settings, mem);
+  nghttp2_session_del(session);
+
+  /* Check that 2 SETTINGS_HEADER_TABLE_SIZE 0 and 4096 are included
+     and header table size is once cleared to 0. */
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+
+  nghttp2_submit_request(session, NULL, &nv, 1, NULL, NULL);
+
+  nghttp2_session_send(session);
+
+  CU_ASSERT(session->hd_deflater.ctx.hd_table.len > 0);
+
+  iv[0].settings_id = NGHTTP2_SETTINGS_HEADER_TABLE_SIZE;
+  iv[0].value = 0;
+
+  iv[1].settings_id = NGHTTP2_SETTINGS_HEADER_TABLE_SIZE;
+  iv[1].value = 2048;
+
+  nghttp2_frame_settings_init(&frame.settings, NGHTTP2_FLAG_NONE, dup_iv(iv, 2),
+                              2);
+
+  CU_ASSERT(0 == nghttp2_session_on_settings_received(session, &frame, 0));
+
+  CU_ASSERT(0 == session->hd_deflater.ctx.hd_table.len);
+  CU_ASSERT(2048 == session->hd_deflater.ctx.hd_table_bufsize_max);
+  CU_ASSERT(2048 == session->remote_settings.header_table_size);
+
+  nghttp2_frame_settings_free(&frame.settings, mem);
+  nghttp2_session_del(session);
+
+  /* Check that remote SETTINGS_MAX_CONCURRENT_STREAMS is set to a value set by
+     nghttp2_option_set_peer_max_concurrent_streams() and reset to the default
+     value (unlimited) after receiving initial SETTINGS frame from the peer. */
+  nghttp2_option_new(&option);
+  nghttp2_option_set_peer_max_concurrent_streams(option, 1000);
+  nghttp2_session_client_new2(&session, &callbacks, NULL, option);
+  CU_ASSERT(1000 == session->remote_settings.max_concurrent_streams);
+
+  nghttp2_frame_settings_init(&frame.settings, NGHTTP2_FLAG_NONE, NULL, 0);
+  CU_ASSERT(0 == nghttp2_session_on_settings_received(session, &frame, 0));
+  CU_ASSERT(NGHTTP2_DEFAULT_MAX_CONCURRENT_STREAMS ==
+            session->remote_settings.max_concurrent_streams);
+
+  nghttp2_frame_settings_free(&frame.settings, mem);
+  nghttp2_session_del(session);
+  nghttp2_option_del(option);
+
+  /* Check too large SETTINGS_MAX_FRAME_SIZE */
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  iv[0].settings_id = NGHTTP2_SETTINGS_MAX_FRAME_SIZE;
+  iv[0].value = NGHTTP2_MAX_FRAME_SIZE_MAX + 1;
+
+  nghttp2_frame_settings_init(&frame.settings, NGHTTP2_FLAG_NONE, dup_iv(iv, 1),
+                              1);
+
+  CU_ASSERT(0 == nghttp2_session_on_settings_received(session, &frame, 0));
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(item != NULL);
+  CU_ASSERT(NGHTTP2_GOAWAY == item->frame.hd.type);
+
+  nghttp2_frame_settings_free(&frame.settings, mem);
+  nghttp2_session_del(session);
+
+  /* Check the case where stream window size overflows */
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  stream1 = open_recv_stream(session, 1);
+
+  /* This will increment window size by 1 */
+  nghttp2_frame_window_update_init(&frame.window_update, NGHTTP2_FLAG_NONE, 1,
+                                   1);
+
+  CU_ASSERT(0 == nghttp2_session_on_window_update_received(session, &frame));
+
+  nghttp2_frame_window_update_free(&frame.window_update);
+
+  iv[0].settings_id = NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE;
+  iv[0].value = NGHTTP2_MAX_WINDOW_SIZE;
+
+  nghttp2_frame_settings_init(&frame.settings, NGHTTP2_FLAG_NONE, dup_iv(iv, 1),
+                              1);
+
+  /* Now window size gets NGHTTP2_MAX_WINDOW_SIZE + 1, which is
+     unacceptable situation in protocol spec. */
+  CU_ASSERT(0 == nghttp2_session_on_settings_received(session, &frame, 0));
+
+  nghttp2_frame_settings_free(&frame.settings, mem);
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(NULL != item);
+  CU_ASSERT(NGHTTP2_SETTINGS == item->frame.hd.type);
+
+  item = nghttp2_outbound_queue_top(&session->ob_reg);
+
+  CU_ASSERT(NULL != item);
+  CU_ASSERT(NGHTTP2_RST_STREAM == item->frame.hd.type);
+  CU_ASSERT(NGHTTP2_STREAM_CLOSING == stream1->state);
+
+  nghttp2_session_del(session);
+
+  /* It is invalid that peer disables ENABLE_CONNECT_PROTOCOL once it
+     has been enabled. */
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+
+  session->remote_settings.enable_connect_protocol = 1;
+
+  iv[0].settings_id = NGHTTP2_SETTINGS_ENABLE_CONNECT_PROTOCOL;
+  iv[0].value = 0;
+
+  nghttp2_frame_settings_init(&frame.settings, NGHTTP2_FLAG_NONE, dup_iv(iv, 1),
+                              1);
+
+  CU_ASSERT(0 == nghttp2_session_on_settings_received(session, &frame, 0));
+
+  nghttp2_frame_settings_free(&frame.settings, mem);
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(NULL != item);
+  CU_ASSERT(NGHTTP2_GOAWAY == item->frame.hd.type);
+
+  nghttp2_session_del(session);
+
+  /* Should send WINDOW_UPDATE with no_auto_window_update option on if
+     the initial window size is decreased and becomes smaller than or
+     equal to the amount of data that has already received. */
+  nghttp2_option_new(&option);
+  nghttp2_option_set_no_auto_window_update(option, 1);
+
+  nghttp2_session_server_new2(&session, &callbacks, NULL, option);
+
+  iv[0].settings_id = NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE;
+  iv[0].value = 1024;
+
+  rv = nghttp2_submit_settings(session, NGHTTP2_FLAG_NONE, iv, 1);
+
+  CU_ASSERT(0 == rv);
+
+  rv = nghttp2_session_send(session);
+
+  CU_ASSERT(0 == rv);
+
+  stream = open_recv_stream(session, 1);
+
+  memset(data, 0, sizeof(data));
+  hd.length = 1024;
+  hd.type = NGHTTP2_DATA;
+  hd.flags = NGHTTP2_FLAG_NONE;
+  hd.stream_id = 1;
+  nghttp2_frame_pack_frame_hd(data, &hd);
+
+  nread =
+      nghttp2_session_mem_recv(session, data, NGHTTP2_FRAME_HDLEN + hd.length);
+
+  CU_ASSERT((ssize_t)(NGHTTP2_FRAME_HDLEN + hd.length) == nread);
+
+  rv = nghttp2_session_consume(session, 1, hd.length);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT((int32_t)hd.length == stream->recv_window_size);
+  CU_ASSERT((int32_t)hd.length == stream->consumed_size);
+
+  nghttp2_frame_settings_init(&frame.settings, NGHTTP2_FLAG_ACK, NULL, 0);
+
+  rv = nghttp2_session_on_settings_received(session, &frame, 0);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(1024 == stream->local_window_size);
+  CU_ASSERT(0 == stream->recv_window_size);
+  CU_ASSERT(0 == stream->consumed_size);
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(NULL != item);
+  CU_ASSERT(NGHTTP2_WINDOW_UPDATE == item->frame.hd.type);
+  CU_ASSERT((int32_t)hd.length ==
+            item->frame.window_update.window_size_increment);
+
+  nghttp2_session_del(session);
+  nghttp2_option_del(option);
+
+  /* It is invalid to change SETTINGS_NO_RFC7540_PRIORITIES in the
+     following SETTINGS. */
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+
+  session->remote_settings.no_rfc7540_priorities = 1;
+
+  iv[0].settings_id = NGHTTP2_SETTINGS_NO_RFC7540_PRIORITIES;
+  iv[0].value = 0;
+
+  nghttp2_frame_settings_init(&frame.settings, NGHTTP2_FLAG_NONE, dup_iv(iv, 1),
+                              1);
+
+  CU_ASSERT(0 == nghttp2_session_on_settings_received(session, &frame, 0));
+
+  nghttp2_frame_settings_free(&frame.settings, mem);
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(NULL != item);
+  CU_ASSERT(NGHTTP2_GOAWAY == item->frame.hd.type);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_on_push_promise_received(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data user_data;
+  nghttp2_frame frame;
+  nghttp2_stream *stream, *promised_stream;
+  nghttp2_outbound_item *item;
+  nghttp2_nv malformed_nva[] = {MAKE_NV(":path", "\x01")};
+  nghttp2_nv *nva;
+  size_t nvlen;
+  nghttp2_mem *mem;
+  nghttp2_settings_entry iv = {NGHTTP2_SETTINGS_ENABLE_PUSH, 0};
+
+  mem = nghttp2_mem_default();
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+  callbacks.on_begin_headers_callback = on_begin_headers_callback;
+  callbacks.on_invalid_frame_recv_callback = on_invalid_frame_recv_callback;
+
+  nghttp2_session_client_new(&session, &callbacks, &user_data);
+
+  stream = open_sent_stream(session, 1);
+
+  nghttp2_frame_push_promise_init(&frame.push_promise, NGHTTP2_FLAG_END_HEADERS,
+                                  1, 2, NULL, 0);
+
+  user_data.begin_headers_cb_called = 0;
+  user_data.invalid_frame_recv_cb_called = 0;
+
+  CU_ASSERT(0 == nghttp2_session_on_push_promise_received(session, &frame));
+
+  CU_ASSERT(1 == user_data.begin_headers_cb_called);
+  CU_ASSERT(1 == session->num_incoming_reserved_streams);
+  promised_stream = nghttp2_session_get_stream(session, 2);
+  CU_ASSERT(NGHTTP2_STREAM_RESERVED == promised_stream->state);
+  CU_ASSERT(2 == session->last_recv_stream_id);
+
+  /* Attempt to PUSH_PROMISE against half close (remote) */
+  nghttp2_stream_shutdown(stream, NGHTTP2_SHUT_RD);
+  frame.push_promise.promised_stream_id = 4;
+
+  user_data.begin_headers_cb_called = 0;
+  user_data.invalid_frame_recv_cb_called = 0;
+  CU_ASSERT(NGHTTP2_ERR_IGN_HEADER_BLOCK ==
+            nghttp2_session_on_push_promise_received(session, &frame));
+
+  CU_ASSERT(0 == user_data.begin_headers_cb_called);
+  CU_ASSERT(1 == user_data.invalid_frame_recv_cb_called);
+  CU_ASSERT(1 == session->num_incoming_reserved_streams);
+  CU_ASSERT(NULL == nghttp2_session_get_stream(session, 4));
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_GOAWAY == item->frame.hd.type);
+  CU_ASSERT(NGHTTP2_STREAM_CLOSED == item->frame.goaway.error_code);
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(4 == session->last_recv_stream_id);
+
+  nghttp2_session_del(session);
+
+  nghttp2_session_client_new(&session, &callbacks, &user_data);
+
+  stream = open_sent_stream(session, 1);
+
+  /* Attempt to PUSH_PROMISE against stream in closing state */
+  stream->state = NGHTTP2_STREAM_CLOSING;
+  frame.push_promise.promised_stream_id = 6;
+
+  user_data.begin_headers_cb_called = 0;
+  user_data.invalid_frame_recv_cb_called = 0;
+  CU_ASSERT(NGHTTP2_ERR_IGN_HEADER_BLOCK ==
+            nghttp2_session_on_push_promise_received(session, &frame));
+
+  CU_ASSERT(0 == user_data.begin_headers_cb_called);
+  CU_ASSERT(0 == session->num_incoming_reserved_streams);
+  CU_ASSERT(NULL == nghttp2_session_get_stream(session, 6));
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_RST_STREAM == item->frame.hd.type);
+  CU_ASSERT(6 == item->frame.hd.stream_id);
+  CU_ASSERT(NGHTTP2_CANCEL == item->frame.rst_stream.error_code);
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  /* Attempt to PUSH_PROMISE against idle stream */
+  frame.hd.stream_id = 3;
+  frame.push_promise.promised_stream_id = 8;
+
+  user_data.begin_headers_cb_called = 0;
+  user_data.invalid_frame_recv_cb_called = 0;
+  CU_ASSERT(NGHTTP2_ERR_IGN_HEADER_BLOCK ==
+            nghttp2_session_on_push_promise_received(session, &frame));
+
+  CU_ASSERT(0 == user_data.begin_headers_cb_called);
+  CU_ASSERT(0 == session->num_incoming_reserved_streams);
+  CU_ASSERT(NULL == nghttp2_session_get_stream(session, 8));
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_GOAWAY == item->frame.hd.type);
+  CU_ASSERT(0 == item->frame.hd.stream_id);
+  CU_ASSERT(NGHTTP2_PROTOCOL_ERROR == item->frame.goaway.error_code);
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  nghttp2_session_del(session);
+
+  nghttp2_session_client_new(&session, &callbacks, &user_data);
+
+  stream = open_sent_stream(session, 1);
+
+  /* Same ID twice */
+  frame.hd.stream_id = 1;
+  frame.push_promise.promised_stream_id = 2;
+
+  user_data.begin_headers_cb_called = 0;
+  user_data.invalid_frame_recv_cb_called = 0;
+  CU_ASSERT(0 == nghttp2_session_on_push_promise_received(session, &frame));
+
+  CU_ASSERT(1 == user_data.begin_headers_cb_called);
+  CU_ASSERT(1 == session->num_incoming_reserved_streams);
+  CU_ASSERT(NULL != nghttp2_session_get_stream(session, 2));
+
+  user_data.begin_headers_cb_called = 0;
+  user_data.invalid_frame_recv_cb_called = 0;
+  CU_ASSERT(NGHTTP2_ERR_IGN_HEADER_BLOCK ==
+            nghttp2_session_on_push_promise_received(session, &frame));
+
+  CU_ASSERT(0 == user_data.begin_headers_cb_called);
+  CU_ASSERT(1 == session->num_incoming_reserved_streams);
+  CU_ASSERT(NULL == nghttp2_session_get_stream(session, 8));
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_GOAWAY == item->frame.hd.type);
+  CU_ASSERT(NGHTTP2_PROTOCOL_ERROR == item->frame.goaway.error_code);
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  /* After GOAWAY, PUSH_PROMISE will be discarded */
+  frame.push_promise.promised_stream_id = 10;
+
+  user_data.begin_headers_cb_called = 0;
+  user_data.invalid_frame_recv_cb_called = 0;
+  CU_ASSERT(NGHTTP2_ERR_IGN_HEADER_BLOCK ==
+            nghttp2_session_on_push_promise_received(session, &frame));
+
+  CU_ASSERT(0 == user_data.begin_headers_cb_called);
+  CU_ASSERT(1 == session->num_incoming_reserved_streams);
+  CU_ASSERT(NULL == nghttp2_session_get_stream(session, 10));
+  CU_ASSERT(NULL == nghttp2_session_get_next_ob_item(session));
+
+  nghttp2_frame_push_promise_free(&frame.push_promise, mem);
+  nghttp2_session_del(session);
+
+  nghttp2_session_client_new(&session, &callbacks, &user_data);
+
+  open_recv_stream2(session, 2, NGHTTP2_STREAM_RESERVED);
+
+  /* Attempt to PUSH_PROMISE against reserved (remote) stream */
+  nghttp2_frame_push_promise_init(&frame.push_promise, NGHTTP2_FLAG_END_HEADERS,
+                                  2, 4, NULL, 0);
+
+  user_data.begin_headers_cb_called = 0;
+  user_data.invalid_frame_recv_cb_called = 0;
+  CU_ASSERT(NGHTTP2_ERR_IGN_HEADER_BLOCK ==
+            nghttp2_session_on_push_promise_received(session, &frame));
+
+  CU_ASSERT(0 == user_data.begin_headers_cb_called);
+  CU_ASSERT(1 == user_data.invalid_frame_recv_cb_called);
+  CU_ASSERT(1 == session->num_incoming_reserved_streams);
+
+  nghttp2_frame_push_promise_free(&frame.push_promise, mem);
+  nghttp2_session_del(session);
+
+  /* Disable PUSH */
+  nghttp2_session_client_new(&session, &callbacks, &user_data);
+
+  open_sent_stream(session, 1);
+
+  session->local_settings.enable_push = 0;
+
+  nghttp2_frame_push_promise_init(&frame.push_promise, NGHTTP2_FLAG_END_HEADERS,
+                                  1, 2, NULL, 0);
+
+  user_data.begin_headers_cb_called = 0;
+  user_data.invalid_frame_recv_cb_called = 0;
+  CU_ASSERT(NGHTTP2_ERR_IGN_HEADER_BLOCK ==
+            nghttp2_session_on_push_promise_received(session, &frame));
+
+  CU_ASSERT(0 == user_data.begin_headers_cb_called);
+  CU_ASSERT(1 == user_data.invalid_frame_recv_cb_called);
+  CU_ASSERT(0 == session->num_incoming_reserved_streams);
+
+  nghttp2_frame_push_promise_free(&frame.push_promise, mem);
+  nghttp2_session_del(session);
+
+  /* Check malformed headers. We accept malformed headers */
+  nghttp2_session_client_new(&session, &callbacks, &user_data);
+
+  open_sent_stream(session, 1);
+
+  nvlen = ARRLEN(malformed_nva);
+  nghttp2_nv_array_copy(&nva, malformed_nva, nvlen, mem);
+  nghttp2_frame_push_promise_init(&frame.push_promise, NGHTTP2_FLAG_END_HEADERS,
+                                  1, 2, nva, nvlen);
+  user_data.begin_headers_cb_called = 0;
+  user_data.invalid_frame_recv_cb_called = 0;
+  CU_ASSERT(0 == nghttp2_session_on_push_promise_received(session, &frame));
+
+  CU_ASSERT(1 == user_data.begin_headers_cb_called);
+  CU_ASSERT(0 == user_data.invalid_frame_recv_cb_called);
+
+  nghttp2_frame_push_promise_free(&frame.push_promise, mem);
+  nghttp2_session_del(session);
+
+  /* If local_settings.enable_push = 0 is pending, but not acked from
+     peer, incoming PUSH_PROMISE is rejected */
+  nghttp2_session_client_new(&session, &callbacks, &user_data);
+
+  open_sent_stream(session, 1);
+
+  /* Submit settings with ENABLE_PUSH = 0 (thus disabling push) */
+  nghttp2_submit_settings(session, NGHTTP2_FLAG_NONE, &iv, 1);
+
+  nghttp2_frame_push_promise_init(&frame.push_promise, NGHTTP2_FLAG_END_HEADERS,
+                                  1, 2, NULL, 0);
+
+  CU_ASSERT(NGHTTP2_ERR_IGN_HEADER_BLOCK ==
+            nghttp2_session_on_push_promise_received(session, &frame));
+
+  CU_ASSERT(0 == session->num_incoming_reserved_streams);
+
+  nghttp2_frame_push_promise_free(&frame.push_promise, mem);
+  nghttp2_session_del(session);
+
+  /* Check max_incoming_reserved_streams */
+  nghttp2_session_client_new(&session, &callbacks, &user_data);
+  session->max_incoming_reserved_streams = 1;
+
+  open_sent_stream(session, 1);
+  open_recv_stream2(session, 2, NGHTTP2_STREAM_RESERVED);
+
+  CU_ASSERT(1 == session->num_incoming_reserved_streams);
+
+  nghttp2_frame_push_promise_init(&frame.push_promise, NGHTTP2_FLAG_END_HEADERS,
+                                  1, 4, NULL, 0);
+
+  CU_ASSERT(NGHTTP2_ERR_IGN_HEADER_BLOCK ==
+            nghttp2_session_on_push_promise_received(session, &frame));
+
+  CU_ASSERT(1 == session->num_incoming_reserved_streams);
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(NGHTTP2_RST_STREAM == item->frame.hd.type);
+  CU_ASSERT(NGHTTP2_CANCEL == item->frame.rst_stream.error_code);
+
+  nghttp2_frame_push_promise_free(&frame.push_promise, mem);
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_on_ping_received(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data user_data;
+  nghttp2_frame frame;
+  nghttp2_outbound_item *top;
+  const uint8_t opaque_data[] = "01234567";
+  nghttp2_option *option;
+
+  user_data.frame_recv_cb_called = 0;
+  user_data.invalid_frame_recv_cb_called = 0;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.on_frame_recv_callback = on_frame_recv_callback;
+  callbacks.on_invalid_frame_recv_callback = on_invalid_frame_recv_callback;
+
+  nghttp2_session_client_new(&session, &callbacks, &user_data);
+  nghttp2_frame_ping_init(&frame.ping, NGHTTP2_FLAG_ACK, opaque_data);
+
+  CU_ASSERT(0 == nghttp2_session_on_ping_received(session, &frame));
+  CU_ASSERT(1 == user_data.frame_recv_cb_called);
+
+  /* Since this ping frame has ACK flag set, no further action is
+     performed. */
+  CU_ASSERT(NULL == nghttp2_outbound_queue_top(&session->ob_urgent));
+
+  /* Clear the flag, and receive it again */
+  frame.hd.flags = NGHTTP2_FLAG_NONE;
+
+  CU_ASSERT(0 == nghttp2_session_on_ping_received(session, &frame));
+  CU_ASSERT(2 == user_data.frame_recv_cb_called);
+  top = nghttp2_outbound_queue_top(&session->ob_urgent);
+  CU_ASSERT(NGHTTP2_PING == top->frame.hd.type);
+  CU_ASSERT(NGHTTP2_FLAG_ACK == top->frame.hd.flags);
+  CU_ASSERT(memcmp(opaque_data, top->frame.ping.opaque_data, 8) == 0);
+
+  nghttp2_frame_ping_free(&frame.ping);
+  nghttp2_session_del(session);
+
+  /* Use nghttp2_option_set_no_auto_ping_ack() */
+  nghttp2_option_new(&option);
+  nghttp2_option_set_no_auto_ping_ack(option, 1);
+
+  nghttp2_session_server_new2(&session, &callbacks, &user_data, option);
+  nghttp2_frame_ping_init(&frame.ping, NGHTTP2_FLAG_NONE, NULL);
+
+  user_data.frame_recv_cb_called = 0;
+
+  CU_ASSERT(0 == nghttp2_session_on_ping_received(session, &frame));
+  CU_ASSERT(1 == user_data.frame_recv_cb_called);
+  CU_ASSERT(NULL == nghttp2_outbound_queue_top(&session->ob_urgent));
+
+  nghttp2_frame_ping_free(&frame.ping);
+  nghttp2_session_del(session);
+  nghttp2_option_del(option);
+}
+
+void test_nghttp2_session_on_goaway_received(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data user_data;
+  nghttp2_frame frame;
+  int i;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+  user_data.frame_recv_cb_called = 0;
+  user_data.invalid_frame_recv_cb_called = 0;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.on_frame_recv_callback = on_frame_recv_callback;
+  callbacks.on_invalid_frame_recv_callback = on_invalid_frame_recv_callback;
+  callbacks.on_stream_close_callback = on_stream_close_callback;
+
+  nghttp2_session_client_new(&session, &callbacks, &user_data);
+
+  for (i = 1; i <= 7; ++i) {
+    if (nghttp2_session_is_my_stream_id(session, i)) {
+      open_sent_stream(session, i);
+    } else {
+      open_recv_stream(session, i);
+    }
+  }
+
+  nghttp2_frame_goaway_init(&frame.goaway, 3, NGHTTP2_PROTOCOL_ERROR, NULL, 0);
+
+  user_data.stream_close_cb_called = 0;
+
+  CU_ASSERT(0 == nghttp2_session_on_goaway_received(session, &frame));
+
+  CU_ASSERT(1 == user_data.frame_recv_cb_called);
+  CU_ASSERT(3 == session->remote_last_stream_id);
+  /* on_stream_close should be callsed for 2 times (stream 5 and 7) */
+  CU_ASSERT(2 == user_data.stream_close_cb_called);
+
+  CU_ASSERT(NULL != nghttp2_session_get_stream(session, 1));
+  CU_ASSERT(NULL != nghttp2_session_get_stream(session, 2));
+  CU_ASSERT(NULL != nghttp2_session_get_stream(session, 3));
+  CU_ASSERT(NULL != nghttp2_session_get_stream(session, 4));
+  CU_ASSERT(NULL == nghttp2_session_get_stream(session, 5));
+  CU_ASSERT(NULL != nghttp2_session_get_stream(session, 6));
+  CU_ASSERT(NULL == nghttp2_session_get_stream(session, 7));
+
+  nghttp2_frame_goaway_free(&frame.goaway, mem);
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_on_window_update_received(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data user_data;
+  nghttp2_frame frame;
+  nghttp2_stream *stream;
+  nghttp2_outbound_item *data_item;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.on_frame_recv_callback = on_frame_recv_callback;
+  callbacks.on_invalid_frame_recv_callback = on_invalid_frame_recv_callback;
+  user_data.frame_recv_cb_called = 0;
+  user_data.invalid_frame_recv_cb_called = 0;
+
+  nghttp2_session_client_new(&session, &callbacks, &user_data);
+
+  stream = open_sent_stream(session, 1);
+
+  data_item = create_data_ob_item(mem);
+
+  CU_ASSERT(0 == nghttp2_stream_attach_item(stream, data_item));
+
+  nghttp2_frame_window_update_init(&frame.window_update, NGHTTP2_FLAG_NONE, 1,
+                                   16 * 1024);
+
+  CU_ASSERT(0 == nghttp2_session_on_window_update_received(session, &frame));
+  CU_ASSERT(1 == user_data.frame_recv_cb_called);
+  CU_ASSERT(NGHTTP2_INITIAL_WINDOW_SIZE + 16 * 1024 ==
+            stream->remote_window_size);
+
+  CU_ASSERT(0 == nghttp2_stream_defer_item(
+                     stream, NGHTTP2_STREAM_FLAG_DEFERRED_FLOW_CONTROL));
+
+  CU_ASSERT(0 == nghttp2_session_on_window_update_received(session, &frame));
+  CU_ASSERT(2 == user_data.frame_recv_cb_called);
+  CU_ASSERT(NGHTTP2_INITIAL_WINDOW_SIZE + 16 * 1024 * 2 ==
+            stream->remote_window_size);
+  CU_ASSERT(0 == (stream->flags & NGHTTP2_STREAM_FLAG_DEFERRED_ALL));
+
+  nghttp2_frame_window_update_free(&frame.window_update);
+
+  /* Receiving WINDOW_UPDATE on reserved (remote) stream is a
+     connection error */
+  open_recv_stream2(session, 2, NGHTTP2_STREAM_RESERVED);
+
+  nghttp2_frame_window_update_init(&frame.window_update, NGHTTP2_FLAG_NONE, 2,
+                                   4096);
+
+  CU_ASSERT(!(session->goaway_flags & NGHTTP2_GOAWAY_TERM_ON_SEND));
+  CU_ASSERT(0 == nghttp2_session_on_window_update_received(session, &frame));
+  CU_ASSERT(session->goaway_flags & NGHTTP2_GOAWAY_TERM_ON_SEND);
+
+  nghttp2_frame_window_update_free(&frame.window_update);
+
+  nghttp2_session_del(session);
+
+  /* Receiving WINDOW_UPDATE on reserved (local) stream is allowed */
+  nghttp2_session_server_new(&session, &callbacks, &user_data);
+
+  stream = open_sent_stream2(session, 2, NGHTTP2_STREAM_RESERVED);
+
+  nghttp2_frame_window_update_init(&frame.window_update, NGHTTP2_FLAG_NONE, 2,
+                                   4096);
+
+  CU_ASSERT(0 == nghttp2_session_on_window_update_received(session, &frame));
+  CU_ASSERT(!(session->goaway_flags & NGHTTP2_GOAWAY_TERM_ON_SEND));
+
+  CU_ASSERT(NGHTTP2_INITIAL_WINDOW_SIZE + 4096 == stream->remote_window_size);
+
+  nghttp2_frame_window_update_free(&frame.window_update);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_on_data_received(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data user_data;
+  nghttp2_outbound_item *top;
+  nghttp2_stream *stream;
+  nghttp2_frame frame;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+
+  nghttp2_session_client_new(&session, &callbacks, &user_data);
+  stream = open_recv_stream(session, 2);
+
+  nghttp2_frame_hd_init(&frame.hd, 4096, NGHTTP2_DATA, NGHTTP2_FLAG_NONE, 2);
+
+  CU_ASSERT(0 == nghttp2_session_on_data_received(session, &frame));
+  CU_ASSERT(0 == stream->shut_flags);
+
+  frame.hd.flags = NGHTTP2_FLAG_END_STREAM;
+
+  CU_ASSERT(0 == nghttp2_session_on_data_received(session, &frame));
+  CU_ASSERT(NGHTTP2_SHUT_RD == stream->shut_flags);
+
+  /* If NGHTTP2_STREAM_CLOSING state, DATA frame is discarded. */
+  open_sent_stream2(session, 1, NGHTTP2_STREAM_CLOSING);
+
+  frame.hd.flags = NGHTTP2_FLAG_NONE;
+  frame.hd.stream_id = 1;
+
+  CU_ASSERT(0 == nghttp2_session_on_data_received(session, &frame));
+  CU_ASSERT(NULL == nghttp2_outbound_queue_top(&session->ob_reg));
+
+  /* Check INVALID_STREAM case: DATA frame with stream ID which does
+     not exist. */
+
+  frame.hd.stream_id = 3;
+
+  CU_ASSERT(0 == nghttp2_session_on_data_received(session, &frame));
+  top = nghttp2_outbound_queue_top(&session->ob_reg);
+  /* DATA against nonexistent stream is just ignored for now. */
+  CU_ASSERT(top == NULL);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_on_data_received_fail_fast(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  uint8_t buf[9];
+  nghttp2_stream *stream;
+  nghttp2_frame_hd hd;
+  nghttp2_outbound_item *item;
+
+  memset(&callbacks, 0, sizeof(callbacks));
+
+  nghttp2_frame_hd_init(&hd, 0, NGHTTP2_DATA, NGHTTP2_FLAG_NONE, 1);
+  nghttp2_frame_pack_frame_hd(buf, &hd);
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  /* DATA to closed (remote) */
+  stream = open_recv_stream(session, 1);
+  nghttp2_stream_shutdown(stream, NGHTTP2_SHUT_RD);
+
+  CU_ASSERT((ssize_t)sizeof(buf) ==
+            nghttp2_session_mem_recv(session, buf, sizeof(buf)));
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(NULL != item);
+  CU_ASSERT(NGHTTP2_GOAWAY == item->frame.hd.type);
+
+  nghttp2_session_del(session);
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  /* DATA to closed stream with explicit closed (remote) */
+  stream = open_recv_stream(session, 1);
+  nghttp2_stream_shutdown(stream, NGHTTP2_SHUT_RD);
+  nghttp2_session_close_stream(session, 1, NGHTTP2_NO_ERROR);
+
+  CU_ASSERT((ssize_t)sizeof(buf) ==
+            nghttp2_session_mem_recv(session, buf, sizeof(buf)));
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(NULL != item);
+  CU_ASSERT(NGHTTP2_GOAWAY == item->frame.hd.type);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_on_altsvc_received(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data ud;
+  nghttp2_frame frame;
+  nghttp2_option *option;
+  uint8_t origin[] = "nghttp2.org";
+  uint8_t field_value[] = "h2=\":443\"";
+  int rv;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.on_frame_recv_callback = on_frame_recv_callback;
+
+  nghttp2_option_new(&option);
+  nghttp2_option_set_builtin_recv_extension_type(option, NGHTTP2_ALTSVC);
+
+  nghttp2_session_client_new2(&session, &callbacks, &ud, option);
+
+  frame.ext.payload = &session->iframe.ext_frame_payload;
+
+  /* We just pass the strings without making a copy.  This is OK,
+     since we never call nghttp2_frame_altsvc_free(). */
+  nghttp2_frame_altsvc_init(&frame.ext, 0, origin, sizeof(origin) - 1,
+                            field_value, sizeof(field_value) - 1);
+
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_on_altsvc_received(session, &frame);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(1 == ud.frame_recv_cb_called);
+
+  nghttp2_session_del(session);
+
+  /* Receiving empty origin with stream ID == 0 */
+  nghttp2_session_client_new2(&session, &callbacks, &ud, option);
+
+  frame.ext.payload = &session->iframe.ext_frame_payload;
+
+  nghttp2_frame_altsvc_init(&frame.ext, 0, origin, 0, field_value,
+                            sizeof(field_value) - 1);
+
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_on_altsvc_received(session, &frame);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+
+  nghttp2_session_del(session);
+
+  /* Receiving non-empty origin with stream ID != 0 */
+  nghttp2_session_client_new2(&session, &callbacks, &ud, option);
+
+  frame.ext.payload = &session->iframe.ext_frame_payload;
+
+  open_sent_stream(session, 1);
+
+  nghttp2_frame_altsvc_init(&frame.ext, 1, origin, sizeof(origin) - 1,
+                            field_value, sizeof(field_value) - 1);
+
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_on_altsvc_received(session, &frame);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+
+  nghttp2_session_del(session);
+
+  /* Receiving empty origin with stream ID != 0; this is OK */
+  nghttp2_session_client_new2(&session, &callbacks, &ud, option);
+
+  frame.ext.payload = &session->iframe.ext_frame_payload;
+
+  open_sent_stream(session, 1);
+
+  nghttp2_frame_altsvc_init(&frame.ext, 1, origin, 0, field_value,
+                            sizeof(field_value) - 1);
+
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_on_altsvc_received(session, &frame);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(1 == ud.frame_recv_cb_called);
+
+  nghttp2_session_del(session);
+
+  /* Stream does not exist; ALTSVC will be ignored. */
+  nghttp2_session_client_new2(&session, &callbacks, &ud, option);
+
+  frame.ext.payload = &session->iframe.ext_frame_payload;
+
+  nghttp2_frame_altsvc_init(&frame.ext, 1, origin, 0, field_value,
+                            sizeof(field_value) - 1);
+
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_on_altsvc_received(session, &frame);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+
+  nghttp2_session_del(session);
+
+  nghttp2_option_del(option);
+}
+
+void test_nghttp2_session_send_headers_start_stream(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_outbound_item *item;
+  nghttp2_frame *frame;
+  nghttp2_stream *stream;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+
+  item = mem->malloc(sizeof(nghttp2_outbound_item), NULL);
+
+  nghttp2_outbound_item_init(item);
+
+  frame = &item->frame;
+
+  nghttp2_frame_headers_init(&frame->headers, NGHTTP2_FLAG_END_HEADERS,
+                             (int32_t)session->next_stream_id,
+                             NGHTTP2_HCAT_REQUEST, NULL, NULL, 0);
+  session->next_stream_id += 2;
+
+  nghttp2_session_add_item(session, item);
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  stream = nghttp2_session_get_stream(session, 1);
+  CU_ASSERT(NGHTTP2_STREAM_OPENING == stream->state);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_send_headers_reply(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_outbound_item *item;
+  nghttp2_frame *frame;
+  nghttp2_stream *stream;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  CU_ASSERT(0 == nghttp2_session_server_new(&session, &callbacks, NULL));
+  open_recv_stream2(session, 1, NGHTTP2_STREAM_OPENING);
+
+  item = mem->malloc(sizeof(nghttp2_outbound_item), NULL);
+
+  nghttp2_outbound_item_init(item);
+
+  frame = &item->frame;
+
+  nghttp2_frame_headers_init(&frame->headers, NGHTTP2_FLAG_END_HEADERS, 1,
+                             NGHTTP2_HCAT_HEADERS, NULL, NULL, 0);
+  nghttp2_session_add_item(session, item);
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  stream = nghttp2_session_get_stream(session, 1);
+  CU_ASSERT(NGHTTP2_STREAM_OPENED == stream->state);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_send_headers_frame_size_error(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_outbound_item *item;
+  nghttp2_frame *frame;
+  nghttp2_nv *nva;
+  size_t nvlen;
+  size_t vallen = NGHTTP2_HD_MAX_NV;
+  nghttp2_nv nv[28];
+  size_t nnv = ARRLEN(nv);
+  size_t i;
+  my_user_data ud;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+
+  for (i = 0; i < nnv; ++i) {
+    nv[i].name = (uint8_t *)"header";
+    nv[i].namelen = strlen((const char *)nv[i].name);
+    nv[i].value = mem->malloc(vallen + 1, NULL);
+    memset(nv[i].value, '0' + (int)i, vallen);
+    nv[i].value[vallen] = '\0';
+    nv[i].valuelen = vallen;
+    nv[i].flags = NGHTTP2_NV_FLAG_NONE;
+  }
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+  callbacks.on_frame_not_send_callback = on_frame_not_send_callback;
+
+  nghttp2_session_client_new(&session, &callbacks, &ud);
+  nvlen = nnv;
+  nghttp2_nv_array_copy(&nva, nv, nvlen, mem);
+
+  item = mem->malloc(sizeof(nghttp2_outbound_item), NULL);
+
+  nghttp2_outbound_item_init(item);
+
+  frame = &item->frame;
+
+  nghttp2_frame_headers_init(&frame->headers, NGHTTP2_FLAG_END_HEADERS,
+                             (int32_t)session->next_stream_id,
+                             NGHTTP2_HCAT_REQUEST, NULL, nva, nvlen);
+
+  session->next_stream_id += 2;
+
+  nghttp2_session_add_item(session, item);
+
+  ud.frame_not_send_cb_called = 0;
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  CU_ASSERT(1 == ud.frame_not_send_cb_called);
+  CU_ASSERT(NGHTTP2_HEADERS == ud.not_sent_frame_type);
+  CU_ASSERT(NGHTTP2_ERR_FRAME_SIZE_ERROR == ud.not_sent_error);
+
+  for (i = 0; i < nnv; ++i) {
+    mem->free(nv[i].value, NULL);
+  }
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_send_headers_push_reply(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_outbound_item *item;
+  nghttp2_frame *frame;
+  nghttp2_stream *stream;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  CU_ASSERT(0 == nghttp2_session_server_new(&session, &callbacks, NULL));
+  open_sent_stream2(session, 2, NGHTTP2_STREAM_RESERVED);
+
+  item = mem->malloc(sizeof(nghttp2_outbound_item), NULL);
+
+  nghttp2_outbound_item_init(item);
+
+  frame = &item->frame;
+
+  nghttp2_frame_headers_init(&frame->headers, NGHTTP2_FLAG_END_HEADERS, 2,
+                             NGHTTP2_HCAT_HEADERS, NULL, NULL, 0);
+  nghttp2_session_add_item(session, item);
+  CU_ASSERT(0 == session->num_outgoing_streams);
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(1 == session->num_outgoing_streams);
+  stream = nghttp2_session_get_stream(session, 2);
+  CU_ASSERT(NGHTTP2_STREAM_OPENED == stream->state);
+  CU_ASSERT(0 == (stream->flags & NGHTTP2_STREAM_FLAG_PUSH));
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_send_rst_stream(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data user_data;
+  nghttp2_outbound_item *item;
+  nghttp2_frame *frame;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+  nghttp2_session_client_new(&session, &callbacks, &user_data);
+  open_sent_stream(session, 1);
+
+  item = mem->malloc(sizeof(nghttp2_outbound_item), NULL);
+
+  nghttp2_outbound_item_init(item);
+
+  frame = &item->frame;
+
+  nghttp2_frame_rst_stream_init(&frame->rst_stream, 1, NGHTTP2_PROTOCOL_ERROR);
+  nghttp2_session_add_item(session, item);
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  CU_ASSERT(NULL == nghttp2_session_get_stream(session, 1));
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_send_push_promise(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_outbound_item *item;
+  nghttp2_frame *frame;
+  nghttp2_stream *stream;
+  nghttp2_settings_entry iv;
+  my_user_data ud;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+  callbacks.on_frame_not_send_callback = on_frame_not_send_callback;
+
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+  open_recv_stream(session, 1);
+
+  item = mem->malloc(sizeof(nghttp2_outbound_item), NULL);
+
+  nghttp2_outbound_item_init(item);
+
+  frame = &item->frame;
+
+  nghttp2_frame_push_promise_init(&frame->push_promise,
+                                  NGHTTP2_FLAG_END_HEADERS, 1,
+                                  (int32_t)session->next_stream_id, NULL, 0);
+
+  session->next_stream_id += 2;
+
+  nghttp2_session_add_item(session, item);
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  stream = nghttp2_session_get_stream(session, 2);
+  CU_ASSERT(NGHTTP2_STREAM_RESERVED == stream->state);
+
+  /* Received ENABLE_PUSH = 0 */
+  iv.settings_id = NGHTTP2_SETTINGS_ENABLE_PUSH;
+  iv.value = 0;
+  frame = mem->malloc(sizeof(nghttp2_frame), NULL);
+  nghttp2_frame_settings_init(&frame->settings, NGHTTP2_FLAG_NONE,
+                              dup_iv(&iv, 1), 1);
+  nghttp2_session_on_settings_received(session, frame, 1);
+  nghttp2_frame_settings_free(&frame->settings, mem);
+  mem->free(frame, NULL);
+
+  item = mem->malloc(sizeof(nghttp2_outbound_item), NULL);
+
+  nghttp2_outbound_item_init(item);
+
+  frame = &item->frame;
+
+  nghttp2_frame_push_promise_init(&frame->push_promise,
+                                  NGHTTP2_FLAG_END_HEADERS, 1, -1, NULL, 0);
+  nghttp2_session_add_item(session, item);
+
+  ud.frame_not_send_cb_called = 0;
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  CU_ASSERT(1 == ud.frame_not_send_cb_called);
+  CU_ASSERT(NGHTTP2_PUSH_PROMISE == ud.not_sent_frame_type);
+  CU_ASSERT(NGHTTP2_ERR_PUSH_DISABLED == ud.not_sent_error);
+
+  nghttp2_session_del(session);
+
+  /* PUSH_PROMISE from client is error */
+  nghttp2_session_client_new(&session, &callbacks, &ud);
+  open_sent_stream(session, 1);
+  item = mem->malloc(sizeof(nghttp2_outbound_item), NULL);
+
+  nghttp2_outbound_item_init(item);
+
+  frame = &item->frame;
+
+  nghttp2_frame_push_promise_init(&frame->push_promise,
+                                  NGHTTP2_FLAG_END_HEADERS, 1, -1, NULL, 0);
+  nghttp2_session_add_item(session, item);
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(NULL == nghttp2_session_get_stream(session, 3));
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_is_my_stream_id(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  CU_ASSERT(0 == nghttp2_session_is_my_stream_id(session, 0));
+  CU_ASSERT(0 == nghttp2_session_is_my_stream_id(session, 1));
+  CU_ASSERT(1 == nghttp2_session_is_my_stream_id(session, 2));
+
+  nghttp2_session_del(session);
+
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+
+  CU_ASSERT(0 == nghttp2_session_is_my_stream_id(session, 0));
+  CU_ASSERT(1 == nghttp2_session_is_my_stream_id(session, 1));
+  CU_ASSERT(0 == nghttp2_session_is_my_stream_id(session, 2));
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_upgrade2(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  uint8_t settings_payload[128];
+  size_t settings_payloadlen;
+  nghttp2_settings_entry iv[16];
+  nghttp2_stream *stream;
+  nghttp2_outbound_item *item;
+  ssize_t rv;
+  nghttp2_bufs bufs;
+  nghttp2_buf *buf;
+  nghttp2_hd_deflater deflater;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+  iv[0].settings_id = NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS;
+  iv[0].value = 1;
+  iv[1].settings_id = NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE;
+  iv[1].value = 4095;
+  settings_payloadlen = (size_t)nghttp2_pack_settings_payload(
+      settings_payload, sizeof(settings_payload), iv, 2);
+
+  /* Check client side */
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+  CU_ASSERT(0 == nghttp2_session_upgrade2(session, settings_payload,
+                                          settings_payloadlen, 0, &callbacks));
+  CU_ASSERT(1 == session->last_sent_stream_id);
+  stream = nghttp2_session_get_stream(session, 1);
+  CU_ASSERT(stream != NULL);
+  CU_ASSERT(&callbacks == stream->stream_user_data);
+  CU_ASSERT(NGHTTP2_SHUT_WR == stream->shut_flags);
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_SETTINGS == item->frame.hd.type);
+  CU_ASSERT(2 == item->frame.settings.niv);
+  CU_ASSERT(NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS ==
+            item->frame.settings.iv[0].settings_id);
+  CU_ASSERT(1 == item->frame.settings.iv[0].value);
+  CU_ASSERT(NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE ==
+            item->frame.settings.iv[1].settings_id);
+  CU_ASSERT(4095 == item->frame.settings.iv[1].value);
+
+  /* Call nghttp2_session_upgrade2() again is error */
+  CU_ASSERT(NGHTTP2_ERR_PROTO ==
+            nghttp2_session_upgrade2(session, settings_payload,
+                                     settings_payloadlen, 0, &callbacks));
+  nghttp2_session_del(session);
+
+  /* Make sure that response from server can be received */
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+
+  CU_ASSERT(0 == nghttp2_session_upgrade2(session, settings_payload,
+                                          settings_payloadlen, 0, &callbacks));
+
+  stream = nghttp2_session_get_stream(session, 1);
+
+  CU_ASSERT(NGHTTP2_STREAM_OPENING == stream->state);
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+  rv = pack_headers(&bufs, &deflater, 1, NGHTTP2_FLAG_END_HEADERS, resnv,
+                    ARRLEN(resnv), mem);
+
+  CU_ASSERT(0 == rv);
+
+  buf = &bufs.head->buf;
+
+  rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf));
+
+  CU_ASSERT(rv == (ssize_t)nghttp2_buf_len(buf));
+  CU_ASSERT(NGHTTP2_STREAM_OPENED == stream->state);
+
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_session_del(session);
+
+  nghttp2_bufs_reset(&bufs);
+
+  /* Check server side */
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+  CU_ASSERT(0 == nghttp2_session_upgrade2(session, settings_payload,
+                                          settings_payloadlen, 0, &callbacks));
+  CU_ASSERT(1 == session->last_recv_stream_id);
+  stream = nghttp2_session_get_stream(session, 1);
+  CU_ASSERT(stream != NULL);
+  CU_ASSERT(NULL == stream->stream_user_data);
+  CU_ASSERT(NGHTTP2_SHUT_RD == stream->shut_flags);
+  CU_ASSERT(NULL == nghttp2_session_get_next_ob_item(session));
+  CU_ASSERT(1 == session->remote_settings.max_concurrent_streams);
+  CU_ASSERT(4095 == session->remote_settings.initial_window_size);
+  /* Call nghttp2_session_upgrade2() again is error */
+  CU_ASSERT(NGHTTP2_ERR_PROTO ==
+            nghttp2_session_upgrade2(session, settings_payload,
+                                     settings_payloadlen, 0, &callbacks));
+  nghttp2_session_del(session);
+
+  /* Empty SETTINGS is OK */
+  settings_payloadlen = (size_t)nghttp2_pack_settings_payload(
+      settings_payload, sizeof(settings_payload), NULL, 0);
+
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+  CU_ASSERT(0 == nghttp2_session_upgrade2(session, settings_payload,
+                                          settings_payloadlen, 0, NULL));
+  nghttp2_session_del(session);
+  nghttp2_bufs_free(&bufs);
+}
+
+void test_nghttp2_session_reprioritize_stream(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_stream *stream;
+  nghttp2_stream *dep_stream;
+  nghttp2_priority_spec pri_spec;
+  int rv;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = block_count_send_callback;
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  stream = open_recv_stream(session, 1);
+
+  nghttp2_priority_spec_init(&pri_spec, 0, 10, 0);
+
+  rv = nghttp2_session_reprioritize_stream(session, stream, &pri_spec);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(10 == stream->weight);
+  CU_ASSERT(&session->root == stream->dep_prev);
+
+  /* If dependency to idle stream which is not in dependency tree yet */
+
+  nghttp2_priority_spec_init(&pri_spec, 3, 99, 0);
+
+  rv = nghttp2_session_reprioritize_stream(session, stream, &pri_spec);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(99 == stream->weight);
+  CU_ASSERT(3 == stream->dep_prev->stream_id);
+
+  dep_stream = nghttp2_session_get_stream_raw(session, 3);
+
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT == dep_stream->weight);
+
+  dep_stream = open_recv_stream(session, 3);
+
+  /* Change weight */
+  pri_spec.weight = 128;
+
+  rv = nghttp2_session_reprioritize_stream(session, stream, &pri_spec);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(128 == stream->weight);
+  CU_ASSERT(dep_stream == stream->dep_prev);
+
+  /* Change weight again to test short-path case */
+  pri_spec.weight = 100;
+
+  rv = nghttp2_session_reprioritize_stream(session, stream, &pri_spec);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(100 == stream->weight);
+  CU_ASSERT(dep_stream == stream->dep_prev);
+  CU_ASSERT(100 == dep_stream->sum_dep_weight);
+
+  /* Test circular dependency; stream 1 is first removed and becomes
+     root.  Then stream 3 depends on it. */
+  nghttp2_priority_spec_init(&pri_spec, 1, 1, 0);
+
+  rv = nghttp2_session_reprioritize_stream(session, dep_stream, &pri_spec);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(1 == dep_stream->weight);
+  CU_ASSERT(stream == dep_stream->dep_prev);
+
+  /* Making priority to closed stream will result in default
+     priority */
+  session->last_recv_stream_id = 9;
+
+  nghttp2_priority_spec_init(&pri_spec, 5, 5, 0);
+
+  rv = nghttp2_session_reprioritize_stream(session, stream, &pri_spec);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT == stream->weight);
+
+  nghttp2_session_del(session);
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  /* circular dependency; in case of stream which is not a direct
+     descendant of root.  Use exclusive dependency. */
+  stream = open_recv_stream(session, 1);
+  stream = open_recv_stream_with_dep(session, 3, stream);
+  stream = open_recv_stream_with_dep(session, 5, stream);
+  stream = open_recv_stream_with_dep(session, 7, stream);
+  open_recv_stream_with_dep(session, 9, stream);
+
+  nghttp2_priority_spec_init(&pri_spec, 7, 1, 1);
+
+  stream = nghttp2_session_get_stream(session, 3);
+  rv = nghttp2_session_reprioritize_stream(session, stream, &pri_spec);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(7 == stream->dep_prev->stream_id);
+
+  stream = nghttp2_session_get_stream(session, 7);
+
+  CU_ASSERT(1 == stream->dep_prev->stream_id);
+
+  stream = nghttp2_session_get_stream(session, 9);
+
+  CU_ASSERT(3 == stream->dep_prev->stream_id);
+
+  stream = nghttp2_session_get_stream(session, 5);
+
+  CU_ASSERT(3 == stream->dep_prev->stream_id);
+
+  nghttp2_session_del(session);
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  /* circular dependency; in case of stream which is not a direct
+     descendant of root.  Without exclusive dependency. */
+  stream = open_recv_stream(session, 1);
+  stream = open_recv_stream_with_dep(session, 3, stream);
+  stream = open_recv_stream_with_dep(session, 5, stream);
+  stream = open_recv_stream_with_dep(session, 7, stream);
+  open_recv_stream_with_dep(session, 9, stream);
+
+  nghttp2_priority_spec_init(&pri_spec, 7, 1, 0);
+
+  stream = nghttp2_session_get_stream(session, 3);
+  rv = nghttp2_session_reprioritize_stream(session, stream, &pri_spec);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(7 == stream->dep_prev->stream_id);
+
+  stream = nghttp2_session_get_stream(session, 7);
+
+  CU_ASSERT(1 == stream->dep_prev->stream_id);
+
+  stream = nghttp2_session_get_stream(session, 9);
+
+  CU_ASSERT(7 == stream->dep_prev->stream_id);
+
+  stream = nghttp2_session_get_stream(session, 5);
+
+  CU_ASSERT(3 == stream->dep_prev->stream_id);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_reprioritize_stream_with_idle_stream_dep(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_stream *stream;
+  nghttp2_priority_spec pri_spec;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = block_count_send_callback;
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  stream = open_recv_stream(session, 1);
+
+  session->pending_local_max_concurrent_stream = 1;
+
+  nghttp2_priority_spec_init(&pri_spec, 101, 10, 0);
+
+  nghttp2_session_reprioritize_stream(session, stream, &pri_spec);
+
+  /* idle stream is not counteed to max concurrent streams */
+
+  CU_ASSERT(10 == stream->weight);
+  CU_ASSERT(101 == stream->dep_prev->stream_id);
+
+  stream = nghttp2_session_get_stream_raw(session, 101);
+
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT == stream->weight);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_submit_data(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_data_provider data_prd;
+  my_user_data ud;
+  nghttp2_frame *frame;
+  nghttp2_frame_hd hd;
+  nghttp2_active_outbound_item *aob;
+  nghttp2_bufs *framebufs;
+  nghttp2_buf *buf;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = block_count_send_callback;
+
+  data_prd.read_callback = fixed_length_data_source_read_callback;
+  ud.data_source_length = NGHTTP2_DATA_PAYLOADLEN * 2;
+  CU_ASSERT(0 == nghttp2_session_client_new(&session, &callbacks, &ud));
+  aob = &session->aob;
+  framebufs = &aob->framebufs;
+
+  open_sent_stream(session, 1);
+
+  CU_ASSERT(
+      0 == nghttp2_submit_data(session, NGHTTP2_FLAG_END_STREAM, 1, &data_prd));
+
+  ud.block_count = 0;
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  frame = &aob->item->frame;
+
+  buf = &framebufs->head->buf;
+  nghttp2_frame_unpack_frame_hd(&hd, buf->pos);
+
+  CU_ASSERT(NGHTTP2_FLAG_NONE == hd.flags);
+  CU_ASSERT(NGHTTP2_FLAG_NONE == frame->hd.flags);
+  /* aux_data.data.flags has these flags */
+  CU_ASSERT(NGHTTP2_FLAG_END_STREAM == aob->item->aux_data.data.flags);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_submit_data_read_length_too_large(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_data_provider data_prd;
+  my_user_data ud;
+  nghttp2_frame *frame;
+  nghttp2_frame_hd hd;
+  nghttp2_active_outbound_item *aob;
+  nghttp2_bufs *framebufs;
+  nghttp2_buf *buf;
+  size_t payloadlen;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = block_count_send_callback;
+  callbacks.read_length_callback = too_large_data_source_length_callback;
+
+  data_prd.read_callback = fixed_length_data_source_read_callback;
+  ud.data_source_length = NGHTTP2_DATA_PAYLOADLEN * 2;
+  CU_ASSERT(0 == nghttp2_session_client_new(&session, &callbacks, &ud));
+  aob = &session->aob;
+  framebufs = &aob->framebufs;
+
+  open_sent_stream(session, 1);
+
+  CU_ASSERT(
+      0 == nghttp2_submit_data(session, NGHTTP2_FLAG_END_STREAM, 1, &data_prd));
+
+  ud.block_count = 0;
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  frame = &aob->item->frame;
+
+  buf = &framebufs->head->buf;
+  nghttp2_frame_unpack_frame_hd(&hd, buf->pos);
+
+  CU_ASSERT(NGHTTP2_FLAG_NONE == hd.flags);
+  CU_ASSERT(NGHTTP2_FLAG_NONE == frame->hd.flags);
+  CU_ASSERT(16384 == hd.length)
+  /* aux_data.data.flags has these flags */
+  CU_ASSERT(NGHTTP2_FLAG_END_STREAM == aob->item->aux_data.data.flags);
+
+  nghttp2_session_del(session);
+
+  /* Check that buffers are expanded */
+  CU_ASSERT(0 == nghttp2_session_client_new(&session, &callbacks, &ud));
+
+  ud.data_source_length = NGHTTP2_MAX_FRAME_SIZE_MAX;
+
+  session->remote_settings.max_frame_size = NGHTTP2_MAX_FRAME_SIZE_MAX;
+
+  open_sent_stream(session, 1);
+
+  CU_ASSERT(
+      0 == nghttp2_submit_data(session, NGHTTP2_FLAG_END_STREAM, 1, &data_prd));
+
+  ud.block_count = 0;
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  aob = &session->aob;
+
+  frame = &aob->item->frame;
+
+  framebufs = &aob->framebufs;
+
+  buf = &framebufs->head->buf;
+  nghttp2_frame_unpack_frame_hd(&hd, buf->pos);
+
+  payloadlen = nghttp2_min(NGHTTP2_INITIAL_CONNECTION_WINDOW_SIZE,
+                           NGHTTP2_INITIAL_WINDOW_SIZE);
+
+  CU_ASSERT(NGHTTP2_FRAME_HDLEN + 1 + payloadlen ==
+            (size_t)nghttp2_buf_cap(buf));
+  CU_ASSERT(NGHTTP2_FLAG_NONE == hd.flags);
+  CU_ASSERT(NGHTTP2_FLAG_NONE == frame->hd.flags);
+  CU_ASSERT(payloadlen == hd.length);
+  /* aux_data.data.flags has these flags */
+  CU_ASSERT(NGHTTP2_FLAG_END_STREAM == aob->item->aux_data.data.flags);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_submit_data_read_length_smallest(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_data_provider data_prd;
+  my_user_data ud;
+  nghttp2_frame *frame;
+  nghttp2_frame_hd hd;
+  nghttp2_active_outbound_item *aob;
+  nghttp2_bufs *framebufs;
+  nghttp2_buf *buf;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = block_count_send_callback;
+  callbacks.read_length_callback = smallest_length_data_source_length_callback;
+
+  data_prd.read_callback = fixed_length_data_source_read_callback;
+  ud.data_source_length = NGHTTP2_DATA_PAYLOADLEN * 2;
+  CU_ASSERT(0 == nghttp2_session_client_new(&session, &callbacks, &ud));
+  aob = &session->aob;
+  framebufs = &aob->framebufs;
+
+  open_sent_stream(session, 1);
+
+  CU_ASSERT(
+      0 == nghttp2_submit_data(session, NGHTTP2_FLAG_END_STREAM, 1, &data_prd));
+
+  ud.block_count = 0;
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  frame = &aob->item->frame;
+
+  buf = &framebufs->head->buf;
+  nghttp2_frame_unpack_frame_hd(&hd, buf->pos);
+
+  CU_ASSERT(NGHTTP2_FLAG_NONE == hd.flags);
+  CU_ASSERT(NGHTTP2_FLAG_NONE == frame->hd.flags);
+  CU_ASSERT(1 == hd.length)
+  /* aux_data.data.flags has these flags */
+  CU_ASSERT(NGHTTP2_FLAG_END_STREAM == aob->item->aux_data.data.flags);
+
+  nghttp2_session_del(session);
+}
+
+static ssize_t submit_data_twice_data_source_read_callback(
+    nghttp2_session *session, int32_t stream_id, uint8_t *buf, size_t len,
+    uint32_t *data_flags, nghttp2_data_source *source, void *user_data) {
+  (void)session;
+  (void)stream_id;
+  (void)buf;
+  (void)source;
+  (void)user_data;
+
+  *data_flags |= NGHTTP2_DATA_FLAG_EOF;
+  return (ssize_t)nghttp2_min(len, 16);
+}
+
+static int submit_data_twice_on_frame_send_callback(nghttp2_session *session,
+                                                    const nghttp2_frame *frame,
+                                                    void *user_data) {
+  static int called = 0;
+  int rv;
+  nghttp2_data_provider data_prd;
+  (void)user_data;
+
+  if (called == 0) {
+    called = 1;
+
+    data_prd.read_callback = submit_data_twice_data_source_read_callback;
+
+    rv = nghttp2_submit_data(session, NGHTTP2_FLAG_END_STREAM,
+                             frame->hd.stream_id, &data_prd);
+    CU_ASSERT(0 == rv);
+  }
+
+  return 0;
+}
+
+void test_nghttp2_submit_data_twice(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_data_provider data_prd;
+  my_user_data ud;
+  accumulator acc;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = accumulator_send_callback;
+  callbacks.on_frame_send_callback = submit_data_twice_on_frame_send_callback;
+
+  data_prd.read_callback = submit_data_twice_data_source_read_callback;
+
+  acc.length = 0;
+  ud.acc = &acc;
+
+  CU_ASSERT(0 == nghttp2_session_client_new(&session, &callbacks, &ud));
+
+  open_sent_stream(session, 1);
+
+  CU_ASSERT(0 == nghttp2_submit_data(session, NGHTTP2_FLAG_NONE, 1, &data_prd));
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  /* We should have sent 2 DATA frame with 16 bytes payload each */
+  CU_ASSERT(NGHTTP2_FRAME_HDLEN * 2 + 16 * 2 == acc.length);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_submit_request_with_data(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_data_provider data_prd;
+  my_user_data ud;
+  nghttp2_outbound_item *item;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  data_prd.read_callback = fixed_length_data_source_read_callback;
+  ud.data_source_length = 64 * 1024 - 1;
+  CU_ASSERT(0 == nghttp2_session_client_new(&session, &callbacks, &ud));
+  CU_ASSERT(1 == nghttp2_submit_request(session, NULL, reqnv, ARRLEN(reqnv),
+                                        &data_prd, NULL));
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(ARRLEN(reqnv) == item->frame.headers.nvlen);
+  assert_nv_equal(reqnv, item->frame.headers.nva, item->frame.headers.nvlen,
+                  mem);
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(0 == ud.data_source_length);
+
+  nghttp2_session_del(session);
+
+  /* nghttp2_submit_request() with server session is error */
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  CU_ASSERT(NGHTTP2_ERR_PROTO == nghttp2_submit_request(session, NULL, reqnv,
+                                                        ARRLEN(reqnv), NULL,
+                                                        NULL));
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_submit_request_without_data(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  accumulator acc;
+  nghttp2_data_provider data_prd = {{-1}, NULL};
+  nghttp2_outbound_item *item;
+  my_user_data ud;
+  nghttp2_frame frame;
+  nghttp2_hd_inflater inflater;
+  nva_out out;
+  nghttp2_bufs bufs;
+  nghttp2_mem *mem;
+  nghttp2_priority_spec pri_spec;
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+
+  nva_out_init(&out);
+  acc.length = 0;
+  ud.acc = &acc;
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = accumulator_send_callback;
+  CU_ASSERT(0 == nghttp2_session_client_new(&session, &callbacks, &ud));
+
+  nghttp2_hd_inflate_init(&inflater, mem);
+  CU_ASSERT(1 == nghttp2_submit_request(session, NULL, reqnv, ARRLEN(reqnv),
+                                        &data_prd, NULL));
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(ARRLEN(reqnv) == item->frame.headers.nvlen);
+  assert_nv_equal(reqnv, item->frame.headers.nva, item->frame.headers.nvlen,
+                  mem);
+  CU_ASSERT(item->frame.hd.flags & NGHTTP2_FLAG_END_STREAM);
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(0 == unpack_frame(&frame, acc.buf, acc.length));
+
+  nghttp2_bufs_add(&bufs, acc.buf, acc.length);
+  inflate_hd(&inflater, &out, &bufs, NGHTTP2_FRAME_HDLEN, mem);
+
+  CU_ASSERT(ARRLEN(reqnv) == out.nvlen);
+  assert_nv_equal(reqnv, out.nva, out.nvlen, mem);
+  nghttp2_frame_headers_free(&frame.headers, mem);
+  nva_out_reset(&out, mem);
+
+  nghttp2_bufs_free(&bufs);
+  nghttp2_hd_inflate_free(&inflater);
+
+  /* Try to depend on itself is error */
+  nghttp2_priority_spec_init(&pri_spec, (int32_t)session->next_stream_id, 16,
+                             0);
+
+  CU_ASSERT(NGHTTP2_ERR_INVALID_ARGUMENT ==
+            nghttp2_submit_request(session, &pri_spec, reqnv, ARRLEN(reqnv),
+                                   NULL, NULL));
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_submit_response_with_data(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_data_provider data_prd;
+  my_user_data ud;
+  nghttp2_outbound_item *item;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  data_prd.read_callback = fixed_length_data_source_read_callback;
+  ud.data_source_length = 64 * 1024 - 1;
+  CU_ASSERT(0 == nghttp2_session_server_new(&session, &callbacks, &ud));
+  open_recv_stream2(session, 1, NGHTTP2_STREAM_OPENING);
+  CU_ASSERT(0 == nghttp2_submit_response(session, 1, resnv, ARRLEN(resnv),
+                                         &data_prd));
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(ARRLEN(resnv) == item->frame.headers.nvlen);
+  assert_nv_equal(resnv, item->frame.headers.nva, item->frame.headers.nvlen,
+                  mem);
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(0 == ud.data_source_length);
+
+  nghttp2_session_del(session);
+
+  /* Various error cases */
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+
+  /* Calling nghttp2_submit_response() with client session is error */
+  CU_ASSERT(NGHTTP2_ERR_PROTO ==
+            nghttp2_submit_response(session, 1, resnv, ARRLEN(resnv), NULL));
+
+  /* Stream ID <= 0 is error */
+  CU_ASSERT(NGHTTP2_ERR_INVALID_ARGUMENT ==
+            nghttp2_submit_response(session, 0, resnv, ARRLEN(resnv), NULL));
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_submit_response_without_data(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  accumulator acc;
+  nghttp2_data_provider data_prd = {{-1}, NULL};
+  nghttp2_outbound_item *item;
+  my_user_data ud;
+  nghttp2_frame frame;
+  nghttp2_hd_inflater inflater;
+  nva_out out;
+  nghttp2_bufs bufs;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+
+  nva_out_init(&out);
+  acc.length = 0;
+  ud.acc = &acc;
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = accumulator_send_callback;
+  CU_ASSERT(0 == nghttp2_session_server_new(&session, &callbacks, &ud));
+
+  nghttp2_hd_inflate_init(&inflater, mem);
+  open_recv_stream2(session, 1, NGHTTP2_STREAM_OPENING);
+  CU_ASSERT(0 == nghttp2_submit_response(session, 1, resnv, ARRLEN(resnv),
+                                         &data_prd));
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(ARRLEN(resnv) == item->frame.headers.nvlen);
+  assert_nv_equal(resnv, item->frame.headers.nva, item->frame.headers.nvlen,
+                  mem);
+  CU_ASSERT(item->frame.hd.flags & NGHTTP2_FLAG_END_STREAM);
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(0 == unpack_frame(&frame, acc.buf, acc.length));
+
+  nghttp2_bufs_add(&bufs, acc.buf, acc.length);
+  inflate_hd(&inflater, &out, &bufs, NGHTTP2_FRAME_HDLEN, mem);
+
+  CU_ASSERT(ARRLEN(resnv) == out.nvlen);
+  assert_nv_equal(resnv, out.nva, out.nvlen, mem);
+
+  nva_out_reset(&out, mem);
+  nghttp2_bufs_free(&bufs);
+  nghttp2_frame_headers_free(&frame.headers, mem);
+  nghttp2_hd_inflate_free(&inflater);
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_submit_response_push_response(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data ud;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+  callbacks.on_frame_not_send_callback = on_frame_not_send_callback;
+
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+
+  open_sent_stream2(session, 2, NGHTTP2_STREAM_RESERVED);
+
+  session->goaway_flags |= NGHTTP2_GOAWAY_RECV;
+
+  CU_ASSERT(0 ==
+            nghttp2_submit_response(session, 2, resnv, ARRLEN(resnv), NULL));
+
+  ud.frame_not_send_cb_called = 0;
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(1 == ud.frame_not_send_cb_called);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_submit_trailer(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  accumulator acc;
+  nghttp2_data_provider data_prd;
+  nghttp2_outbound_item *item;
+  my_user_data ud;
+  nghttp2_frame frame;
+  nghttp2_hd_inflater inflater;
+  nva_out out;
+  nghttp2_bufs bufs;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+
+  data_prd.read_callback = no_end_stream_data_source_read_callback;
+  nva_out_init(&out);
+  acc.length = 0;
+  ud.acc = &acc;
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+  CU_ASSERT(0 == nghttp2_session_server_new(&session, &callbacks, &ud));
+
+  nghttp2_hd_inflate_init(&inflater, mem);
+  open_recv_stream2(session, 1, NGHTTP2_STREAM_OPENING);
+  CU_ASSERT(0 == nghttp2_submit_response(session, 1, resnv, ARRLEN(resnv),
+                                         &data_prd));
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  CU_ASSERT(0 ==
+            nghttp2_submit_trailer(session, 1, trailernv, ARRLEN(trailernv)));
+
+  session->callbacks.send_callback = accumulator_send_callback;
+
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_HEADERS == item->frame.hd.type);
+  CU_ASSERT(NGHTTP2_HCAT_HEADERS == item->frame.headers.cat);
+  CU_ASSERT(item->frame.hd.flags & NGHTTP2_FLAG_END_STREAM);
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(0 == unpack_frame(&frame, acc.buf, acc.length));
+
+  nghttp2_bufs_add(&bufs, acc.buf, acc.length);
+  inflate_hd(&inflater, &out, &bufs, NGHTTP2_FRAME_HDLEN, mem);
+
+  CU_ASSERT(ARRLEN(trailernv) == out.nvlen);
+  assert_nv_equal(trailernv, out.nva, out.nvlen, mem);
+
+  nva_out_reset(&out, mem);
+  nghttp2_bufs_free(&bufs);
+  nghttp2_frame_headers_free(&frame.headers, mem);
+  nghttp2_hd_inflate_free(&inflater);
+  nghttp2_session_del(session);
+
+  /* Specifying stream ID <= 0 is error */
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+  open_recv_stream(session, 1);
+
+  CU_ASSERT(NGHTTP2_ERR_INVALID_ARGUMENT ==
+            nghttp2_submit_trailer(session, 0, trailernv, ARRLEN(trailernv)));
+
+  CU_ASSERT(NGHTTP2_ERR_INVALID_ARGUMENT ==
+            nghttp2_submit_trailer(session, -1, trailernv, ARRLEN(trailernv)));
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_submit_headers_start_stream(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_outbound_item *item;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  CU_ASSERT(0 == nghttp2_session_client_new(&session, &callbacks, NULL));
+  CU_ASSERT(1 == nghttp2_submit_headers(session, NGHTTP2_FLAG_END_STREAM, -1,
+                                        NULL, reqnv, ARRLEN(reqnv), NULL));
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(ARRLEN(reqnv) == item->frame.headers.nvlen);
+  assert_nv_equal(reqnv, item->frame.headers.nva, item->frame.headers.nvlen,
+                  mem);
+  CU_ASSERT((NGHTTP2_FLAG_END_HEADERS | NGHTTP2_FLAG_END_STREAM) ==
+            item->frame.hd.flags);
+  CU_ASSERT(0 == (item->frame.hd.flags & NGHTTP2_FLAG_PRIORITY));
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_submit_headers_reply(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data ud;
+  nghttp2_outbound_item *item;
+  nghttp2_stream *stream;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+  callbacks.on_frame_send_callback = on_frame_send_callback;
+
+  CU_ASSERT(0 == nghttp2_session_server_new(&session, &callbacks, &ud));
+  CU_ASSERT(0 == nghttp2_submit_headers(session, NGHTTP2_FLAG_END_STREAM, 1,
+                                        NULL, resnv, ARRLEN(resnv), NULL));
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(ARRLEN(resnv) == item->frame.headers.nvlen);
+  assert_nv_equal(resnv, item->frame.headers.nva, item->frame.headers.nvlen,
+                  mem);
+  CU_ASSERT((NGHTTP2_FLAG_END_STREAM | NGHTTP2_FLAG_END_HEADERS) ==
+            item->frame.hd.flags);
+
+  ud.frame_send_cb_called = 0;
+  ud.sent_frame_type = 0;
+  /* The transimission will be canceled because the stream 1 is not
+     open. */
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(0 == ud.frame_send_cb_called);
+
+  stream = open_recv_stream2(session, 1, NGHTTP2_STREAM_OPENING);
+
+  CU_ASSERT(0 == nghttp2_submit_headers(session, NGHTTP2_FLAG_END_STREAM, 1,
+                                        NULL, resnv, ARRLEN(resnv), NULL));
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(1 == ud.frame_send_cb_called);
+  CU_ASSERT(NGHTTP2_HEADERS == ud.sent_frame_type);
+  CU_ASSERT(stream->shut_flags & NGHTTP2_SHUT_WR);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_submit_headers_push_reply(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data ud;
+  nghttp2_stream *stream;
+  int foo;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+  callbacks.on_frame_send_callback = on_frame_send_callback;
+
+  CU_ASSERT(0 == nghttp2_session_server_new(&session, &callbacks, &ud));
+  stream = open_sent_stream2(session, 2, NGHTTP2_STREAM_RESERVED);
+  CU_ASSERT(0 == nghttp2_submit_headers(session, NGHTTP2_FLAG_NONE, 2, NULL,
+                                        resnv, ARRLEN(resnv), &foo));
+
+  ud.frame_send_cb_called = 0;
+  ud.sent_frame_type = 0;
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(1 == ud.frame_send_cb_called);
+  CU_ASSERT(NGHTTP2_HEADERS == ud.sent_frame_type);
+  CU_ASSERT(NGHTTP2_STREAM_OPENED == stream->state);
+  CU_ASSERT(&foo == stream->stream_user_data);
+
+  nghttp2_session_del(session);
+
+  /* Sending HEADERS from client against stream in reserved state is
+     error */
+  CU_ASSERT(0 == nghttp2_session_client_new(&session, &callbacks, &ud));
+  open_recv_stream2(session, 2, NGHTTP2_STREAM_RESERVED);
+  CU_ASSERT(0 == nghttp2_submit_headers(session, NGHTTP2_FLAG_NONE, 2, NULL,
+                                        reqnv, ARRLEN(reqnv), NULL));
+
+  ud.frame_send_cb_called = 0;
+  ud.sent_frame_type = 0;
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(0 == ud.frame_send_cb_called);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_submit_headers(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data ud;
+  nghttp2_outbound_item *item;
+  nghttp2_stream *stream;
+  accumulator acc;
+  nghttp2_frame frame;
+  nghttp2_hd_inflater inflater;
+  nva_out out;
+  nghttp2_bufs bufs;
+  nghttp2_mem *mem;
+  nghttp2_priority_spec pri_spec;
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+
+  nva_out_init(&out);
+  acc.length = 0;
+  ud.acc = &acc;
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = accumulator_send_callback;
+  callbacks.on_frame_send_callback = on_frame_send_callback;
+
+  CU_ASSERT(0 == nghttp2_session_client_new(&session, &callbacks, &ud));
+
+  nghttp2_hd_inflate_init(&inflater, mem);
+  CU_ASSERT(0 == nghttp2_submit_headers(session, NGHTTP2_FLAG_END_STREAM, 1,
+                                        NULL, reqnv, ARRLEN(reqnv), NULL));
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(ARRLEN(reqnv) == item->frame.headers.nvlen);
+  assert_nv_equal(reqnv, item->frame.headers.nva, item->frame.headers.nvlen,
+                  mem);
+  CU_ASSERT((NGHTTP2_FLAG_END_STREAM | NGHTTP2_FLAG_END_HEADERS) ==
+            item->frame.hd.flags);
+
+  ud.frame_send_cb_called = 0;
+  ud.sent_frame_type = 0;
+  /* The transimission will be canceled because the stream 1 is not
+     open. */
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(0 == ud.frame_send_cb_called);
+
+  stream = open_sent_stream(session, 1);
+
+  CU_ASSERT(0 == nghttp2_submit_headers(session, NGHTTP2_FLAG_END_STREAM, 1,
+                                        NULL, reqnv, ARRLEN(reqnv), NULL));
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(1 == ud.frame_send_cb_called);
+  CU_ASSERT(NGHTTP2_HEADERS == ud.sent_frame_type);
+  CU_ASSERT(stream->shut_flags & NGHTTP2_SHUT_WR);
+
+  CU_ASSERT(0 == unpack_frame(&frame, acc.buf, acc.length));
+
+  nghttp2_bufs_add(&bufs, acc.buf, acc.length);
+  inflate_hd(&inflater, &out, &bufs, NGHTTP2_FRAME_HDLEN, mem);
+
+  CU_ASSERT(ARRLEN(reqnv) == out.nvlen);
+  assert_nv_equal(reqnv, out.nva, out.nvlen, mem);
+
+  nva_out_reset(&out, mem);
+  nghttp2_bufs_free(&bufs);
+  nghttp2_frame_headers_free(&frame.headers, mem);
+
+  nghttp2_hd_inflate_free(&inflater);
+
+  /* Try to depend on itself */
+  nghttp2_priority_spec_init(&pri_spec, 3, 16, 0);
+
+  CU_ASSERT(NGHTTP2_ERR_INVALID_ARGUMENT ==
+            nghttp2_submit_headers(session, NGHTTP2_FLAG_NONE, 3, &pri_spec,
+                                   reqnv, ARRLEN(reqnv), NULL));
+
+  session->next_stream_id = 5;
+  nghttp2_priority_spec_init(&pri_spec, 5, 16, 0);
+
+  CU_ASSERT(NGHTTP2_ERR_INVALID_ARGUMENT ==
+            nghttp2_submit_headers(session, NGHTTP2_FLAG_NONE, -1, &pri_spec,
+                                   reqnv, ARRLEN(reqnv), NULL));
+
+  nghttp2_session_del(session);
+
+  /* Error cases with invalid stream ID */
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  /* Sending nghttp2_submit_headers() with stream_id == 1 and server
+     session is error */
+  CU_ASSERT(NGHTTP2_ERR_PROTO ==
+            nghttp2_submit_headers(session, NGHTTP2_FLAG_NONE, -1, NULL, reqnv,
+                                   ARRLEN(reqnv), NULL));
+
+  /* Sending stream ID <= 0 is error */
+  CU_ASSERT(NGHTTP2_ERR_INVALID_ARGUMENT ==
+            nghttp2_submit_headers(session, NGHTTP2_FLAG_NONE, 0, NULL, resnv,
+                                   ARRLEN(resnv), NULL));
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_submit_headers_continuation(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_nv nv[] = {
+      MAKE_NV("h1", ""), MAKE_NV("h1", ""), MAKE_NV("h1", ""),
+      MAKE_NV("h1", ""), MAKE_NV("h1", ""), MAKE_NV("h1", ""),
+      MAKE_NV("h1", ""),
+  };
+  nghttp2_outbound_item *item;
+  uint8_t data[4096];
+  size_t i;
+  my_user_data ud;
+
+  memset(data, '0', sizeof(data));
+  for (i = 0; i < ARRLEN(nv); ++i) {
+    nv[i].valuelen = sizeof(data);
+    nv[i].value = data;
+  }
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+  callbacks.on_frame_send_callback = on_frame_send_callback;
+
+  CU_ASSERT(0 == nghttp2_session_client_new(&session, &callbacks, &ud));
+  CU_ASSERT(1 == nghttp2_submit_headers(session, NGHTTP2_FLAG_END_STREAM, -1,
+                                        NULL, nv, ARRLEN(nv), NULL));
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_HEADERS == item->frame.hd.type);
+  CU_ASSERT((NGHTTP2_FLAG_END_STREAM | NGHTTP2_FLAG_END_HEADERS) ==
+            item->frame.hd.flags);
+  CU_ASSERT(0 == (item->frame.hd.flags & NGHTTP2_FLAG_PRIORITY));
+
+  ud.frame_send_cb_called = 0;
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(1 == ud.frame_send_cb_called);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_submit_headers_continuation_extra_large(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_nv nv[] = {
+      MAKE_NV("h1", ""), MAKE_NV("h1", ""), MAKE_NV("h1", ""),
+      MAKE_NV("h1", ""), MAKE_NV("h1", ""), MAKE_NV("h1", ""),
+  };
+  nghttp2_outbound_item *item;
+  uint8_t data[16384];
+  size_t i;
+  my_user_data ud;
+  nghttp2_option *opt;
+
+  memset(data, '0', sizeof(data));
+  for (i = 0; i < ARRLEN(nv); ++i) {
+    nv[i].valuelen = sizeof(data);
+    nv[i].value = data;
+  }
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+  callbacks.on_frame_send_callback = on_frame_send_callback;
+
+  /* The default size of max send header block length is too small to
+     send these header fields.  Expand it. */
+  nghttp2_option_new(&opt);
+  nghttp2_option_set_max_send_header_block_length(opt, 102400);
+
+  CU_ASSERT(0 == nghttp2_session_client_new2(&session, &callbacks, &ud, opt));
+  CU_ASSERT(1 == nghttp2_submit_headers(session, NGHTTP2_FLAG_END_STREAM, -1,
+                                        NULL, nv, ARRLEN(nv), NULL));
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_HEADERS == item->frame.hd.type);
+  CU_ASSERT((NGHTTP2_FLAG_END_STREAM | NGHTTP2_FLAG_END_HEADERS) ==
+            item->frame.hd.flags);
+  CU_ASSERT(0 == (item->frame.hd.flags & NGHTTP2_FLAG_PRIORITY));
+
+  ud.frame_send_cb_called = 0;
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(1 == ud.frame_send_cb_called);
+
+  nghttp2_session_del(session);
+  nghttp2_option_del(opt);
+}
+
+void test_nghttp2_submit_priority(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_stream *stream;
+  my_user_data ud;
+  nghttp2_priority_spec pri_spec;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+  callbacks.on_frame_send_callback = on_frame_send_callback;
+
+  nghttp2_session_client_new(&session, &callbacks, &ud);
+  stream = open_sent_stream(session, 1);
+
+  nghttp2_priority_spec_init(&pri_spec, 0, 3, 0);
+
+  /* depends on stream 0 */
+  CU_ASSERT(0 ==
+            nghttp2_submit_priority(session, NGHTTP2_FLAG_NONE, 1, &pri_spec));
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(3 == stream->weight);
+
+  /* submit against idle stream */
+  CU_ASSERT(0 ==
+            nghttp2_submit_priority(session, NGHTTP2_FLAG_NONE, 3, &pri_spec));
+
+  ud.frame_send_cb_called = 0;
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(1 == ud.frame_send_cb_called);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_submit_settings(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data ud;
+  nghttp2_outbound_item *item;
+  nghttp2_frame *frame;
+  nghttp2_settings_entry iv[7];
+  nghttp2_frame ack_frame;
+  const int32_t UNKNOWN_ID = 1000000007;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+
+  iv[0].settings_id = NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS;
+  iv[0].value = 5;
+
+  iv[1].settings_id = NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE;
+  iv[1].value = 16 * 1024;
+
+  iv[2].settings_id = NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS;
+  iv[2].value = 50;
+
+  iv[3].settings_id = NGHTTP2_SETTINGS_HEADER_TABLE_SIZE;
+  iv[3].value = 111;
+
+  iv[4].settings_id = UNKNOWN_ID;
+  iv[4].value = 999;
+
+  iv[5].settings_id = NGHTTP2_SETTINGS_HEADER_TABLE_SIZE;
+  iv[5].value = 1023;
+
+  iv[6].settings_id = NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE;
+  iv[6].value = (uint32_t)NGHTTP2_MAX_WINDOW_SIZE + 1;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+  callbacks.on_frame_send_callback = on_frame_send_callback;
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+
+  CU_ASSERT(NGHTTP2_ERR_INVALID_ARGUMENT ==
+            nghttp2_submit_settings(session, NGHTTP2_FLAG_NONE, iv, 7));
+
+  /* Make sure that local settings are not changed */
+  CU_ASSERT(NGHTTP2_DEFAULT_MAX_CONCURRENT_STREAMS ==
+            session->local_settings.max_concurrent_streams);
+  CU_ASSERT(NGHTTP2_INITIAL_WINDOW_SIZE ==
+            session->local_settings.initial_window_size);
+
+  /* Now sends without 6th one */
+  CU_ASSERT(0 == nghttp2_submit_settings(session, NGHTTP2_FLAG_NONE, iv, 6));
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(NGHTTP2_SETTINGS == item->frame.hd.type);
+
+  frame = &item->frame;
+  CU_ASSERT(6 == frame->settings.niv);
+  CU_ASSERT(5 == frame->settings.iv[0].value);
+  CU_ASSERT(NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS ==
+            frame->settings.iv[0].settings_id);
+
+  CU_ASSERT(16 * 1024 == frame->settings.iv[1].value);
+  CU_ASSERT(NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE ==
+            frame->settings.iv[1].settings_id);
+
+  CU_ASSERT(UNKNOWN_ID == frame->settings.iv[4].settings_id);
+  CU_ASSERT(999 == frame->settings.iv[4].value);
+
+  ud.frame_send_cb_called = 0;
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(1 == ud.frame_send_cb_called);
+
+  CU_ASSERT(50 == session->pending_local_max_concurrent_stream);
+
+  /* before receiving SETTINGS ACK, local settings have still default
+     values */
+  CU_ASSERT(NGHTTP2_DEFAULT_MAX_CONCURRENT_STREAMS ==
+            nghttp2_session_get_local_settings(
+                session, NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS));
+  CU_ASSERT(NGHTTP2_INITIAL_WINDOW_SIZE ==
+            nghttp2_session_get_local_settings(
+                session, NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE));
+
+  nghttp2_frame_settings_init(&ack_frame.settings, NGHTTP2_FLAG_ACK, NULL, 0);
+  CU_ASSERT(0 == nghttp2_session_on_settings_received(session, &ack_frame, 0));
+  nghttp2_frame_settings_free(&ack_frame.settings, mem);
+
+  CU_ASSERT(16 * 1024 == session->local_settings.initial_window_size);
+  CU_ASSERT(111 == session->hd_inflater.ctx.hd_table_bufsize_max);
+  CU_ASSERT(111 == session->hd_inflater.min_hd_table_bufsize_max);
+  CU_ASSERT(50 == session->local_settings.max_concurrent_streams);
+
+  CU_ASSERT(50 == nghttp2_session_get_local_settings(
+                      session, NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS));
+  CU_ASSERT(16 * 1024 == nghttp2_session_get_local_settings(
+                             session, NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE));
+
+  /* We just keep the last seen value */
+  CU_ASSERT(50 == session->pending_local_max_concurrent_stream);
+
+  nghttp2_session_del(session);
+
+  /* Bail out if there are contradicting
+     SETTINGS_NO_RFC7540_PRIORITIES in one SETTINGS. */
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+
+  iv[0].settings_id = NGHTTP2_SETTINGS_NO_RFC7540_PRIORITIES;
+  iv[0].value = 1;
+  iv[1].settings_id = NGHTTP2_SETTINGS_NO_RFC7540_PRIORITIES;
+  iv[1].value = 0;
+
+  CU_ASSERT(NGHTTP2_ERR_INVALID_ARGUMENT ==
+            nghttp2_submit_settings(session, NGHTTP2_FLAG_NONE, iv, 2));
+
+  nghttp2_session_del(session);
+
+  /* Attempt to change SETTINGS_NO_RFC7540_PRIORITIES in the 2nd
+     SETTINGS. */
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+
+  iv[0].settings_id = NGHTTP2_SETTINGS_NO_RFC7540_PRIORITIES;
+  iv[0].value = 1;
+
+  CU_ASSERT(0 == nghttp2_submit_settings(session, NGHTTP2_FLAG_NONE, iv, 1));
+
+  iv[0].settings_id = NGHTTP2_SETTINGS_NO_RFC7540_PRIORITIES;
+  iv[0].value = 0;
+
+  CU_ASSERT(NGHTTP2_ERR_INVALID_ARGUMENT ==
+            nghttp2_submit_settings(session, NGHTTP2_FLAG_NONE, iv, 1));
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_submit_settings_update_local_window_size(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_outbound_item *item;
+  nghttp2_settings_entry iv[4];
+  nghttp2_stream *stream;
+  nghttp2_frame ack_frame;
+  nghttp2_mem *mem;
+  nghttp2_option *option;
+
+  mem = nghttp2_mem_default();
+  nghttp2_frame_settings_init(&ack_frame.settings, NGHTTP2_FLAG_ACK, NULL, 0);
+
+  iv[0].settings_id = NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE;
+  iv[0].value = 16 * 1024;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  stream = open_recv_stream(session, 1);
+  stream->local_window_size = NGHTTP2_INITIAL_WINDOW_SIZE + 100;
+  stream->recv_window_size = 32768;
+
+  open_recv_stream(session, 3);
+
+  CU_ASSERT(0 == nghttp2_submit_settings(session, NGHTTP2_FLAG_NONE, iv, 1));
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(0 == nghttp2_session_on_settings_received(session, &ack_frame, 0));
+
+  stream = nghttp2_session_get_stream(session, 1);
+  CU_ASSERT(0 == stream->recv_window_size);
+  CU_ASSERT(16 * 1024 + 100 == stream->local_window_size);
+
+  stream = nghttp2_session_get_stream(session, 3);
+  CU_ASSERT(16 * 1024 == stream->local_window_size);
+
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_WINDOW_UPDATE == item->frame.hd.type);
+  CU_ASSERT(32768 == item->frame.window_update.window_size_increment);
+
+  nghttp2_session_del(session);
+
+  /* Without auto-window update */
+  nghttp2_option_new(&option);
+  nghttp2_option_set_no_auto_window_update(option, 1);
+
+  nghttp2_session_server_new2(&session, &callbacks, NULL, option);
+
+  nghttp2_option_del(option);
+
+  stream = open_recv_stream(session, 1);
+  stream->local_window_size = NGHTTP2_INITIAL_WINDOW_SIZE + 100;
+  stream->recv_window_size = 32768;
+
+  CU_ASSERT(0 == nghttp2_submit_settings(session, NGHTTP2_FLAG_NONE, iv, 1));
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(0 == nghttp2_session_on_settings_received(session, &ack_frame, 0));
+
+  stream = nghttp2_session_get_stream(session, 1);
+
+  CU_ASSERT(32768 == stream->recv_window_size);
+  CU_ASSERT(16 * 1024 + 100 == stream->local_window_size);
+  /* Check that we can handle the case where local_window_size <
+     recv_window_size */
+  CU_ASSERT(0 == nghttp2_session_get_stream_local_window_size(session, 1));
+
+  nghttp2_session_del(session);
+
+  /* Check overflow case */
+  iv[0].value = 128 * 1024;
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+  stream = open_recv_stream(session, 1);
+  stream->local_window_size = NGHTTP2_MAX_WINDOW_SIZE;
+
+  CU_ASSERT(0 == nghttp2_submit_settings(session, NGHTTP2_FLAG_NONE, iv, 1));
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(0 == nghttp2_session_on_settings_received(session, &ack_frame, 0));
+
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_RST_STREAM == item->frame.hd.type);
+  CU_ASSERT(NGHTTP2_FLOW_CONTROL_ERROR == item->frame.rst_stream.error_code);
+
+  nghttp2_session_del(session);
+  nghttp2_frame_settings_free(&ack_frame.settings, mem);
+}
+
+void test_nghttp2_submit_settings_multiple_times(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_settings_entry iv[4];
+  nghttp2_frame frame;
+  nghttp2_inflight_settings *inflight_settings;
+
+  memset(&callbacks, 0, sizeof(callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+
+  /* first SETTINGS */
+  iv[0].settings_id = NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS;
+  iv[0].value = 100;
+
+  iv[1].settings_id = NGHTTP2_SETTINGS_ENABLE_PUSH;
+  iv[1].value = 0;
+
+  CU_ASSERT(0 == nghttp2_submit_settings(session, NGHTTP2_FLAG_NONE, iv, 2));
+
+  inflight_settings = session->inflight_settings_head;
+
+  CU_ASSERT(NULL != inflight_settings);
+  CU_ASSERT(NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS ==
+            inflight_settings->iv[0].settings_id);
+  CU_ASSERT(100 == inflight_settings->iv[0].value);
+  CU_ASSERT(2 == inflight_settings->niv);
+  CU_ASSERT(NULL == inflight_settings->next);
+
+  CU_ASSERT(100 == session->pending_local_max_concurrent_stream);
+  CU_ASSERT(0 == session->pending_enable_push);
+
+  /* second SETTINGS */
+  iv[0].settings_id = NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS;
+  iv[0].value = 99;
+
+  CU_ASSERT(0 == nghttp2_submit_settings(session, NGHTTP2_FLAG_NONE, iv, 1));
+
+  inflight_settings = session->inflight_settings_head->next;
+
+  CU_ASSERT(NULL != inflight_settings);
+  CU_ASSERT(NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS ==
+            inflight_settings->iv[0].settings_id);
+  CU_ASSERT(99 == inflight_settings->iv[0].value);
+  CU_ASSERT(1 == inflight_settings->niv);
+  CU_ASSERT(NULL == inflight_settings->next);
+
+  CU_ASSERT(99 == session->pending_local_max_concurrent_stream);
+  CU_ASSERT(0 == session->pending_enable_push);
+
+  nghttp2_frame_settings_init(&frame.settings, NGHTTP2_FLAG_ACK, NULL, 0);
+
+  /* receive SETTINGS ACK */
+  CU_ASSERT(0 == nghttp2_session_on_settings_received(session, &frame, 0));
+
+  inflight_settings = session->inflight_settings_head;
+
+  /* first inflight SETTINGS was removed */
+  CU_ASSERT(NULL != inflight_settings);
+  CU_ASSERT(NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS ==
+            inflight_settings->iv[0].settings_id);
+  CU_ASSERT(99 == inflight_settings->iv[0].value);
+  CU_ASSERT(1 == inflight_settings->niv);
+  CU_ASSERT(NULL == inflight_settings->next);
+
+  CU_ASSERT(100 == session->local_settings.max_concurrent_streams);
+
+  /* receive SETTINGS ACK again */
+  CU_ASSERT(0 == nghttp2_session_on_settings_received(session, &frame, 0));
+
+  CU_ASSERT(NULL == session->inflight_settings_head);
+  CU_ASSERT(99 == session->local_settings.max_concurrent_streams);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_submit_push_promise(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data ud;
+  nghttp2_stream *stream;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+  callbacks.on_frame_send_callback = on_frame_send_callback;
+  callbacks.on_frame_not_send_callback = on_frame_not_send_callback;
+
+  CU_ASSERT(0 == nghttp2_session_server_new(&session, &callbacks, &ud));
+  open_recv_stream(session, 1);
+  CU_ASSERT(2 == nghttp2_submit_push_promise(session, NGHTTP2_FLAG_NONE, 1,
+                                             reqnv, ARRLEN(reqnv), &ud));
+
+  stream = nghttp2_session_get_stream(session, 2);
+
+  CU_ASSERT(NULL != stream);
+  CU_ASSERT(NGHTTP2_STREAM_RESERVED == stream->state);
+  CU_ASSERT(&ud == nghttp2_session_get_stream_user_data(session, 2));
+
+  ud.frame_send_cb_called = 0;
+  ud.sent_frame_type = 0;
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(1 == ud.frame_send_cb_called);
+  CU_ASSERT(NGHTTP2_PUSH_PROMISE == ud.sent_frame_type);
+
+  stream = nghttp2_session_get_stream(session, 2);
+
+  CU_ASSERT(NGHTTP2_STREAM_RESERVED == stream->state);
+  CU_ASSERT(&ud == nghttp2_session_get_stream_user_data(session, 2));
+
+  /* submit PUSH_PROMISE while associated stream is not opened */
+  CU_ASSERT(NGHTTP2_ERR_STREAM_CLOSED ==
+            nghttp2_submit_push_promise(session, NGHTTP2_FLAG_NONE, 3, reqnv,
+                                        ARRLEN(reqnv), NULL));
+
+  /* Stream ID <= 0 is error */
+  CU_ASSERT(NGHTTP2_ERR_INVALID_ARGUMENT ==
+            nghttp2_submit_push_promise(session, NGHTTP2_FLAG_NONE, 0, reqnv,
+                                        ARRLEN(reqnv), NULL));
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_submit_window_update(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data ud;
+  nghttp2_outbound_item *item;
+  nghttp2_stream *stream;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  nghttp2_session_client_new(&session, &callbacks, &ud);
+  stream = open_recv_stream(session, 2);
+  stream->recv_window_size = 4096;
+
+  CU_ASSERT(0 ==
+            nghttp2_submit_window_update(session, NGHTTP2_FLAG_NONE, 2, 1024));
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_WINDOW_UPDATE == item->frame.hd.type);
+  CU_ASSERT(1024 == item->frame.window_update.window_size_increment);
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(3072 == stream->recv_window_size);
+
+  CU_ASSERT(0 ==
+            nghttp2_submit_window_update(session, NGHTTP2_FLAG_NONE, 2, 4096));
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_WINDOW_UPDATE == item->frame.hd.type);
+  CU_ASSERT(4096 == item->frame.window_update.window_size_increment);
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(0 == stream->recv_window_size);
+
+  CU_ASSERT(0 ==
+            nghttp2_submit_window_update(session, NGHTTP2_FLAG_NONE, 2, 4096));
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_WINDOW_UPDATE == item->frame.hd.type);
+  CU_ASSERT(4096 == item->frame.window_update.window_size_increment);
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(0 == stream->recv_window_size);
+
+  CU_ASSERT(0 ==
+            nghttp2_submit_window_update(session, NGHTTP2_FLAG_NONE, 2, 0));
+  /* It is ok if stream is closed or does not exist at the call
+     time */
+  CU_ASSERT(0 ==
+            nghttp2_submit_window_update(session, NGHTTP2_FLAG_NONE, 4, 4096));
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_submit_window_update_local_window_size(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_outbound_item *item;
+  nghttp2_stream *stream;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+  stream = open_recv_stream(session, 2);
+  stream->recv_window_size = 4096;
+
+  CU_ASSERT(0 == nghttp2_submit_window_update(session, NGHTTP2_FLAG_NONE, 2,
+                                              stream->recv_window_size + 1));
+  CU_ASSERT(NGHTTP2_INITIAL_WINDOW_SIZE + 1 == stream->local_window_size);
+  CU_ASSERT(0 == stream->recv_window_size);
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_WINDOW_UPDATE == item->frame.hd.type);
+  CU_ASSERT(4097 == item->frame.window_update.window_size_increment);
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  /* Let's decrement local window size */
+  stream->recv_window_size = 4096;
+  CU_ASSERT(0 == nghttp2_submit_window_update(session, NGHTTP2_FLAG_NONE, 2,
+                                              -stream->local_window_size / 2));
+  CU_ASSERT(32768 == stream->local_window_size);
+  CU_ASSERT(-28672 == stream->recv_window_size);
+  CU_ASSERT(32768 == stream->recv_reduction);
+
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(item == NULL);
+
+  /* Increase local window size */
+  CU_ASSERT(0 ==
+            nghttp2_submit_window_update(session, NGHTTP2_FLAG_NONE, 2, 16384));
+  CU_ASSERT(49152 == stream->local_window_size);
+  CU_ASSERT(-12288 == stream->recv_window_size);
+  CU_ASSERT(16384 == stream->recv_reduction);
+  CU_ASSERT(NULL == nghttp2_session_get_next_ob_item(session));
+
+  CU_ASSERT(NGHTTP2_ERR_FLOW_CONTROL ==
+            nghttp2_submit_window_update(session, NGHTTP2_FLAG_NONE, 2,
+                                         NGHTTP2_MAX_WINDOW_SIZE));
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  /* Check connection-level flow control */
+  session->recv_window_size = 4096;
+  CU_ASSERT(0 == nghttp2_submit_window_update(session, NGHTTP2_FLAG_NONE, 0,
+                                              session->recv_window_size + 1));
+  CU_ASSERT(NGHTTP2_INITIAL_CONNECTION_WINDOW_SIZE + 1 ==
+            session->local_window_size);
+  CU_ASSERT(0 == session->recv_window_size);
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_WINDOW_UPDATE == item->frame.hd.type);
+  CU_ASSERT(4097 == item->frame.window_update.window_size_increment);
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  /* Go decrement part */
+  session->recv_window_size = 4096;
+  CU_ASSERT(0 == nghttp2_submit_window_update(session, NGHTTP2_FLAG_NONE, 0,
+                                              -session->local_window_size / 2));
+  CU_ASSERT(32768 == session->local_window_size);
+  CU_ASSERT(-28672 == session->recv_window_size);
+  CU_ASSERT(32768 == session->recv_reduction);
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(item == NULL);
+
+  /* Increase local window size */
+  CU_ASSERT(0 ==
+            nghttp2_submit_window_update(session, NGHTTP2_FLAG_NONE, 0, 16384));
+  CU_ASSERT(49152 == session->local_window_size);
+  CU_ASSERT(-12288 == session->recv_window_size);
+  CU_ASSERT(16384 == session->recv_reduction);
+  CU_ASSERT(NULL == nghttp2_session_get_next_ob_item(session));
+
+  CU_ASSERT(NGHTTP2_ERR_FLOW_CONTROL ==
+            nghttp2_submit_window_update(session, NGHTTP2_FLAG_NONE, 0,
+                                         NGHTTP2_MAX_WINDOW_SIZE));
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_submit_shutdown_notice(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data ud;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+  callbacks.on_frame_send_callback = on_frame_send_callback;
+  callbacks.on_frame_not_send_callback = on_frame_not_send_callback;
+
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+
+  CU_ASSERT(0 == nghttp2_submit_shutdown_notice(session));
+
+  ud.frame_send_cb_called = 0;
+
+  nghttp2_session_send(session);
+
+  CU_ASSERT(1 == ud.frame_send_cb_called);
+  CU_ASSERT(NGHTTP2_GOAWAY == ud.sent_frame_type);
+  CU_ASSERT((1u << 31) - 1 == session->local_last_stream_id);
+
+  /* After another GOAWAY, nghttp2_submit_shutdown_notice() is
+     noop. */
+  CU_ASSERT(0 == nghttp2_session_terminate_session(session, NGHTTP2_NO_ERROR));
+
+  ud.frame_send_cb_called = 0;
+
+  nghttp2_session_send(session);
+
+  CU_ASSERT(1 == ud.frame_send_cb_called);
+  CU_ASSERT(NGHTTP2_GOAWAY == ud.sent_frame_type);
+  CU_ASSERT(0 == session->local_last_stream_id);
+
+  CU_ASSERT(0 == nghttp2_submit_shutdown_notice(session));
+
+  ud.frame_send_cb_called = 0;
+  ud.frame_not_send_cb_called = 0;
+
+  nghttp2_session_send(session);
+
+  CU_ASSERT(0 == ud.frame_send_cb_called);
+  CU_ASSERT(0 == ud.frame_not_send_cb_called);
+
+  nghttp2_session_del(session);
+
+  /* Using nghttp2_submit_shutdown_notice() with client side session
+     is error */
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+
+  CU_ASSERT(NGHTTP2_ERR_INVALID_STATE ==
+            nghttp2_submit_shutdown_notice(session));
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_submit_invalid_nv(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_nv empty_name_nv[] = {MAKE_NV("Version", "HTTP/1.1"),
+                                MAKE_NV("", "empty name")};
+
+  /* Now invalid header name/value pair in HTTP/1.1 is accepted in
+     nghttp2 */
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+
+  CU_ASSERT(0 == nghttp2_session_server_new(&session, &callbacks, NULL));
+
+  /* nghttp2_submit_response */
+  CU_ASSERT(0 == nghttp2_submit_response(session, 2, empty_name_nv,
+                                         ARRLEN(empty_name_nv), NULL));
+
+  /* nghttp2_submit_push_promise */
+  open_recv_stream(session, 1);
+
+  CU_ASSERT(0 < nghttp2_submit_push_promise(session, NGHTTP2_FLAG_NONE, 1,
+                                            empty_name_nv,
+                                            ARRLEN(empty_name_nv), NULL));
+
+  nghttp2_session_del(session);
+
+  CU_ASSERT(0 == nghttp2_session_client_new(&session, &callbacks, NULL));
+
+  /* nghttp2_submit_request */
+  CU_ASSERT(0 < nghttp2_submit_request(session, NULL, empty_name_nv,
+                                       ARRLEN(empty_name_nv), NULL, NULL));
+
+  /* nghttp2_submit_headers */
+  CU_ASSERT(0 < nghttp2_submit_headers(session, NGHTTP2_FLAG_NONE, -1, NULL,
+                                       empty_name_nv, ARRLEN(empty_name_nv),
+                                       NULL));
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_submit_extension(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data ud;
+  accumulator acc;
+  nghttp2_mem *mem;
+  const char data[] = "Hello World!";
+  size_t len;
+  int32_t stream_id;
+  int rv;
+
+  mem = nghttp2_mem_default();
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+
+  callbacks.pack_extension_callback = pack_extension_callback;
+  callbacks.send_callback = accumulator_send_callback;
+
+  nghttp2_buf_init2(&ud.scratchbuf, 4096, mem);
+
+  nghttp2_session_client_new(&session, &callbacks, &ud);
+
+  ud.scratchbuf.last = nghttp2_cpymem(ud.scratchbuf.last, data, sizeof(data));
+  ud.acc = &acc;
+
+  rv = nghttp2_submit_extension(session, 211, 0x01, 3, &ud.scratchbuf);
+
+  CU_ASSERT(0 == rv);
+
+  acc.length = 0;
+
+  rv = nghttp2_session_send(session);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(NGHTTP2_FRAME_HDLEN + sizeof(data) == acc.length);
+
+  len = nghttp2_get_uint32(acc.buf) >> 8;
+
+  CU_ASSERT(sizeof(data) == len);
+  CU_ASSERT(211 == acc.buf[3]);
+  CU_ASSERT(0x01 == acc.buf[4]);
+
+  stream_id = (int32_t)nghttp2_get_uint32(acc.buf + 5);
+
+  CU_ASSERT(3 == stream_id);
+  CU_ASSERT(0 == memcmp(data, &acc.buf[NGHTTP2_FRAME_HDLEN], sizeof(data)));
+
+  nghttp2_session_del(session);
+
+  /* submitting standard HTTP/2 frame is error */
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+
+  rv = nghttp2_submit_extension(session, NGHTTP2_GOAWAY, NGHTTP2_FLAG_NONE, 0,
+                                NULL);
+
+  CU_ASSERT(NGHTTP2_ERR_INVALID_ARGUMENT == rv);
+
+  nghttp2_session_del(session);
+  nghttp2_buf_free(&ud.scratchbuf, mem);
+}
+
+void test_nghttp2_submit_altsvc(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data ud;
+  int rv;
+  ssize_t len;
+  const uint8_t *data;
+  nghttp2_frame_hd hd;
+  size_t origin_len;
+  const uint8_t origin[] = "nghttp2.org";
+  const uint8_t field_value[] = "h2=\":443\"";
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+
+  rv = nghttp2_submit_altsvc(session, NGHTTP2_FLAG_NONE, 0, origin,
+                             sizeof(origin) - 1, field_value,
+                             sizeof(field_value) - 1);
+
+  CU_ASSERT(0 == rv);
+
+  ud.frame_send_cb_called = 0;
+
+  len = nghttp2_session_mem_send(session, &data);
+
+  CU_ASSERT(len == NGHTTP2_FRAME_HDLEN + 2 + sizeof(origin) - 1 +
+                       sizeof(field_value) - 1);
+
+  nghttp2_frame_unpack_frame_hd(&hd, data);
+
+  CU_ASSERT(2 + sizeof(origin) - 1 + sizeof(field_value) - 1 == hd.length);
+  CU_ASSERT(NGHTTP2_ALTSVC == hd.type);
+  CU_ASSERT(NGHTTP2_FLAG_NONE == hd.flags);
+
+  origin_len = nghttp2_get_uint16(data + NGHTTP2_FRAME_HDLEN);
+
+  CU_ASSERT(sizeof(origin) - 1 == origin_len);
+  CU_ASSERT(0 ==
+            memcmp(origin, data + NGHTTP2_FRAME_HDLEN + 2, sizeof(origin) - 1));
+  CU_ASSERT(0 == memcmp(field_value,
+                        data + NGHTTP2_FRAME_HDLEN + 2 + sizeof(origin) - 1,
+                        hd.length - (sizeof(origin) - 1) - 2));
+
+  /* submitting empty origin with stream_id == 0 is error */
+  rv = nghttp2_submit_altsvc(session, NGHTTP2_FLAG_NONE, 0, NULL, 0,
+                             field_value, sizeof(field_value) - 1);
+
+  CU_ASSERT(NGHTTP2_ERR_INVALID_ARGUMENT == rv);
+
+  /* submitting non-empty origin with stream_id != 0 is error */
+  rv = nghttp2_submit_altsvc(session, NGHTTP2_FLAG_NONE, 1, origin,
+                             sizeof(origin) - 1, field_value,
+                             sizeof(field_value) - 1);
+
+  CU_ASSERT(NGHTTP2_ERR_INVALID_ARGUMENT == rv);
+
+  nghttp2_session_del(session);
+
+  /* submitting from client side session is error */
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+
+  rv = nghttp2_submit_altsvc(session, NGHTTP2_FLAG_NONE, 0, origin,
+                             sizeof(origin) - 1, field_value,
+                             sizeof(field_value) - 1);
+
+  CU_ASSERT(NGHTTP2_ERR_INVALID_STATE == rv);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_submit_origin(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data ud;
+  int rv;
+  ssize_t len;
+  const uint8_t *data;
+  static const uint8_t nghttp2[] = "https://nghttp2.org";
+  static const uint8_t examples[] = "https://examples.com";
+  static const nghttp2_origin_entry ov[] = {
+      {
+          (uint8_t *)nghttp2,
+          sizeof(nghttp2) - 1,
+      },
+      {
+          (uint8_t *)examples,
+          sizeof(examples) - 1,
+      },
+  };
+  nghttp2_frame frame;
+  nghttp2_ext_origin origin;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.on_frame_send_callback = on_frame_send_callback;
+
+  frame.ext.payload = &origin;
+
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+
+  rv = nghttp2_submit_origin(session, NGHTTP2_FLAG_NONE, ov, 2);
+
+  CU_ASSERT(0 == rv);
+
+  ud.frame_send_cb_called = 0;
+  len = nghttp2_session_mem_send(session, &data);
+
+  CU_ASSERT(len > 0);
+  CU_ASSERT(1 == ud.frame_send_cb_called);
+
+  nghttp2_frame_unpack_frame_hd(&frame.hd, data);
+  rv = nghttp2_frame_unpack_origin_payload(
+      &frame.ext, data + NGHTTP2_FRAME_HDLEN, (size_t)len - NGHTTP2_FRAME_HDLEN,
+      mem);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(0 == frame.hd.stream_id);
+  CU_ASSERT(NGHTTP2_ORIGIN == frame.hd.type);
+  CU_ASSERT(2 == origin.nov);
+  CU_ASSERT(0 == memcmp(nghttp2, origin.ov[0].origin, sizeof(nghttp2) - 1));
+  CU_ASSERT(sizeof(nghttp2) - 1 == origin.ov[0].origin_len);
+  CU_ASSERT(0 == memcmp(examples, origin.ov[1].origin, sizeof(examples) - 1));
+  CU_ASSERT(sizeof(examples) - 1 == origin.ov[1].origin_len);
+
+  nghttp2_frame_origin_free(&frame.ext, mem);
+
+  nghttp2_session_del(session);
+
+  /* Submitting ORIGIN frame from client session is error */
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+
+  rv = nghttp2_submit_origin(session, NGHTTP2_FLAG_NONE, ov, 1);
+
+  CU_ASSERT(NGHTTP2_ERR_INVALID_STATE == rv);
+
+  nghttp2_session_del(session);
+
+  /* Submitting empty ORIGIN frame */
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+
+  rv = nghttp2_submit_origin(session, NGHTTP2_FLAG_NONE, NULL, 0);
+
+  CU_ASSERT(0 == rv);
+
+  ud.frame_send_cb_called = 0;
+  len = nghttp2_session_mem_send(session, &data);
+
+  CU_ASSERT(len == NGHTTP2_FRAME_HDLEN);
+  CU_ASSERT(1 == ud.frame_send_cb_called);
+
+  nghttp2_frame_unpack_frame_hd(&frame.hd, data);
+
+  CU_ASSERT(NGHTTP2_ORIGIN == frame.hd.type);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_submit_priority_update(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  const uint8_t field_value[] = "i";
+  my_user_data ud;
+  const uint8_t *data;
+  int rv;
+  nghttp2_frame frame;
+  nghttp2_ext_priority_update priority_update;
+  ssize_t len;
+  int32_t stream_id;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.on_frame_send_callback = on_frame_send_callback;
+
+  nghttp2_session_client_new(&session, &callbacks, &ud);
+
+  session->pending_no_rfc7540_priorities = 1;
+
+  stream_id =
+      nghttp2_submit_request(session, NULL, reqnv, ARRLEN(reqnv), NULL, NULL);
+
+  CU_ASSERT(1 == stream_id);
+
+  len = nghttp2_session_mem_send(session, &data);
+
+  CU_ASSERT(len > 0);
+
+  rv = nghttp2_submit_priority_update(session, NGHTTP2_FLAG_NONE, stream_id,
+                                      field_value, sizeof(field_value) - 1);
+
+  CU_ASSERT(0 == rv);
+
+  frame.ext.payload = &priority_update;
+
+  ud.frame_send_cb_called = 0;
+  len = nghttp2_session_mem_send(session, &data);
+
+  CU_ASSERT(len > 0);
+  CU_ASSERT(1 == ud.frame_send_cb_called);
+
+  nghttp2_frame_unpack_frame_hd(&frame.hd, data);
+  nghttp2_frame_unpack_priority_update_payload(
+      &frame.ext, (uint8_t *)(data + NGHTTP2_FRAME_HDLEN),
+      (size_t)len - NGHTTP2_FRAME_HDLEN);
+
+  CU_ASSERT(0 == frame.hd.stream_id);
+  CU_ASSERT(NGHTTP2_PRIORITY_UPDATE == frame.hd.type);
+  CU_ASSERT(stream_id == priority_update.stream_id);
+  CU_ASSERT(sizeof(field_value) - 1 == priority_update.field_value_len);
+  CU_ASSERT(0 == memcmp(field_value, priority_update.field_value,
+                        sizeof(field_value) - 1));
+
+  nghttp2_session_del(session);
+
+  /* Submitting PRIORITY_UPDATE frame from server session is error */
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+
+  open_recv_stream(session, 1);
+
+  rv = nghttp2_submit_priority_update(session, NGHTTP2_FLAG_NONE, 1,
+                                      field_value, sizeof(field_value) - 1);
+
+  CU_ASSERT(NGHTTP2_ERR_INVALID_STATE == rv);
+
+  nghttp2_session_del(session);
+
+  /* Submitting PRIORITY_UPDATE with empty field_value */
+  nghttp2_session_client_new(&session, &callbacks, &ud);
+
+  stream_id =
+      nghttp2_submit_request(session, NULL, reqnv, ARRLEN(reqnv), NULL, NULL);
+
+  CU_ASSERT(1 == stream_id);
+
+  len = nghttp2_session_mem_send(session, &data);
+
+  CU_ASSERT(len > 0);
+
+  rv = nghttp2_submit_priority_update(session, NGHTTP2_FLAG_NONE, stream_id,
+                                      NULL, 0);
+
+  CU_ASSERT(0 == rv);
+
+  frame.ext.payload = &priority_update;
+
+  len = nghttp2_session_mem_send(session, &data);
+
+  CU_ASSERT(len > 0);
+
+  nghttp2_frame_unpack_frame_hd(&frame.hd, data);
+  nghttp2_frame_unpack_priority_update_payload(
+      &frame.ext, (uint8_t *)(data + NGHTTP2_FRAME_HDLEN),
+      (size_t)len - NGHTTP2_FRAME_HDLEN);
+
+  CU_ASSERT(0 == frame.hd.stream_id);
+  CU_ASSERT(NGHTTP2_PRIORITY_UPDATE == frame.hd.type);
+  CU_ASSERT(stream_id == priority_update.stream_id);
+  CU_ASSERT(0 == priority_update.field_value_len);
+  CU_ASSERT(NULL == priority_update.field_value);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_submit_rst_stream(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_outbound_item *item;
+  int rv;
+  int32_t stream_id;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+
+  /* Sending RST_STREAM to idle stream (local) is ignored */
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+
+  rv = nghttp2_submit_rst_stream(session, NGHTTP2_FLAG_NONE, 1,
+                                 NGHTTP2_NO_ERROR);
+
+  CU_ASSERT(0 == rv);
+
+  item = nghttp2_outbound_queue_top(&session->ob_reg);
+
+  CU_ASSERT(NULL == item);
+
+  nghttp2_session_del(session);
+
+  /* Sending RST_STREAM to idle stream (remote) is ignored */
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+
+  rv = nghttp2_submit_rst_stream(session, NGHTTP2_FLAG_NONE, 2,
+                                 NGHTTP2_NO_ERROR);
+
+  CU_ASSERT(0 == rv);
+
+  item = nghttp2_outbound_queue_top(&session->ob_reg);
+
+  CU_ASSERT(NULL == item);
+
+  nghttp2_session_del(session);
+
+  /* Sending RST_STREAM to non-idle stream (local) */
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+
+  open_sent_stream(session, 1);
+
+  rv = nghttp2_submit_rst_stream(session, NGHTTP2_FLAG_NONE, 1,
+                                 NGHTTP2_NO_ERROR);
+
+  CU_ASSERT(0 == rv);
+
+  item = nghttp2_outbound_queue_top(&session->ob_reg);
+
+  CU_ASSERT(NULL != item);
+  CU_ASSERT(NGHTTP2_RST_STREAM == item->frame.hd.type);
+  CU_ASSERT(1 == item->frame.hd.stream_id);
+
+  nghttp2_session_del(session);
+
+  /* Sending RST_STREAM to non-idle stream (remote) */
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+
+  open_recv_stream(session, 2);
+
+  rv = nghttp2_submit_rst_stream(session, NGHTTP2_FLAG_NONE, 2,
+                                 NGHTTP2_NO_ERROR);
+
+  CU_ASSERT(0 == rv);
+
+  item = nghttp2_outbound_queue_top(&session->ob_reg);
+
+  CU_ASSERT(NULL != item);
+  CU_ASSERT(NGHTTP2_RST_STREAM == item->frame.hd.type);
+  CU_ASSERT(2 == item->frame.hd.stream_id);
+
+  nghttp2_session_del(session);
+
+  /* Sending RST_STREAM to pending stream */
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+
+  stream_id =
+      nghttp2_submit_request(session, NULL, reqnv, ARRLEN(reqnv), NULL, NULL);
+
+  CU_ASSERT(stream_id > 0);
+
+  item = nghttp2_outbound_queue_top(&session->ob_syn);
+
+  CU_ASSERT(NULL != item);
+  CU_ASSERT(NGHTTP2_HEADERS == item->frame.hd.type);
+  CU_ASSERT(0 == item->aux_data.headers.canceled);
+
+  rv = nghttp2_submit_rst_stream(session, NGHTTP2_FLAG_NONE, stream_id,
+                                 NGHTTP2_NO_ERROR);
+
+  CU_ASSERT(0 == rv);
+
+  item = nghttp2_outbound_queue_top(&session->ob_syn);
+
+  CU_ASSERT(NULL != item);
+  CU_ASSERT(NGHTTP2_HEADERS == item->frame.hd.type);
+  CU_ASSERT(1 == item->aux_data.headers.canceled);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_open_stream(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_stream *stream;
+  nghttp2_priority_spec pri_spec;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  nghttp2_priority_spec_init(&pri_spec, 0, 245, 0);
+
+  stream = nghttp2_session_open_stream(session, 1, NGHTTP2_STREAM_FLAG_NONE,
+                                       &pri_spec, NGHTTP2_STREAM_OPENED, NULL);
+  CU_ASSERT(1 == session->num_incoming_streams);
+  CU_ASSERT(0 == session->num_outgoing_streams);
+  CU_ASSERT(NGHTTP2_STREAM_OPENED == stream->state);
+  CU_ASSERT(245 == stream->weight);
+  CU_ASSERT(&session->root == stream->dep_prev);
+  CU_ASSERT(NGHTTP2_SHUT_NONE == stream->shut_flags);
+
+  stream = nghttp2_session_open_stream(session, 2, NGHTTP2_STREAM_FLAG_NONE,
+                                       &pri_spec_default,
+                                       NGHTTP2_STREAM_OPENING, NULL);
+  CU_ASSERT(1 == session->num_incoming_streams);
+  CU_ASSERT(1 == session->num_outgoing_streams);
+  CU_ASSERT(&session->root == stream->dep_prev);
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT == stream->weight);
+  CU_ASSERT(NGHTTP2_SHUT_NONE == stream->shut_flags);
+
+  stream = nghttp2_session_open_stream(session, 4, NGHTTP2_STREAM_FLAG_NONE,
+                                       &pri_spec_default,
+                                       NGHTTP2_STREAM_RESERVED, NULL);
+  CU_ASSERT(1 == session->num_incoming_streams);
+  CU_ASSERT(1 == session->num_outgoing_streams);
+  CU_ASSERT(&session->root == stream->dep_prev);
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT == stream->weight);
+  CU_ASSERT(NGHTTP2_SHUT_RD == stream->shut_flags);
+
+  nghttp2_priority_spec_init(&pri_spec, 1, 17, 1);
+
+  stream = nghttp2_session_open_stream(session, 3, NGHTTP2_STREAM_FLAG_NONE,
+                                       &pri_spec, NGHTTP2_STREAM_OPENED, NULL);
+  CU_ASSERT(17 == stream->weight);
+  CU_ASSERT(1 == stream->dep_prev->stream_id);
+
+  /* Dependency to idle stream */
+  nghttp2_priority_spec_init(&pri_spec, 1000000007, 240, 1);
+
+  stream = nghttp2_session_open_stream(session, 5, NGHTTP2_STREAM_FLAG_NONE,
+                                       &pri_spec, NGHTTP2_STREAM_OPENED, NULL);
+  CU_ASSERT(240 == stream->weight);
+  CU_ASSERT(1000000007 == stream->dep_prev->stream_id);
+
+  stream = nghttp2_session_get_stream_raw(session, 1000000007);
+
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT == stream->weight);
+  CU_ASSERT(&session->root == stream->dep_prev);
+
+  /* Dependency to closed stream which is not in dependency tree */
+  session->last_recv_stream_id = 7;
+
+  nghttp2_priority_spec_init(&pri_spec, 7, 10, 0);
+
+  stream = nghttp2_session_open_stream(session, 9, NGHTTP2_FLAG_NONE, &pri_spec,
+                                       NGHTTP2_STREAM_OPENED, NULL);
+
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT == stream->weight);
+  CU_ASSERT(&session->root == stream->dep_prev);
+
+  nghttp2_session_del(session);
+
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+  stream = nghttp2_session_open_stream(session, 4, NGHTTP2_STREAM_FLAG_NONE,
+                                       &pri_spec_default,
+                                       NGHTTP2_STREAM_RESERVED, NULL);
+  CU_ASSERT(0 == session->num_incoming_streams);
+  CU_ASSERT(0 == session->num_outgoing_streams);
+  CU_ASSERT(&session->root == stream->dep_prev);
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT == stream->weight);
+  CU_ASSERT(NGHTTP2_SHUT_WR == stream->shut_flags);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_open_stream_with_idle_stream_dep(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_stream *stream;
+  nghttp2_priority_spec pri_spec;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  /* Dependency to idle stream */
+  nghttp2_priority_spec_init(&pri_spec, 101, 245, 0);
+
+  stream = nghttp2_session_open_stream(session, 1, NGHTTP2_STREAM_FLAG_NONE,
+                                       &pri_spec, NGHTTP2_STREAM_OPENED, NULL);
+
+  CU_ASSERT(245 == stream->weight);
+  CU_ASSERT(101 == stream->dep_prev->stream_id);
+
+  stream = nghttp2_session_get_stream_raw(session, 101);
+
+  CU_ASSERT(NGHTTP2_STREAM_IDLE == stream->state);
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT == stream->weight);
+
+  nghttp2_priority_spec_init(&pri_spec, 211, 1, 0);
+
+  /* stream 101 was already created as idle. */
+  stream = nghttp2_session_open_stream(session, 101, NGHTTP2_STREAM_FLAG_NONE,
+                                       &pri_spec, NGHTTP2_STREAM_OPENED, NULL);
+
+  CU_ASSERT(1 == stream->weight);
+  CU_ASSERT(211 == stream->dep_prev->stream_id);
+
+  stream = nghttp2_session_get_stream_raw(session, 211);
+
+  CU_ASSERT(NGHTTP2_STREAM_IDLE == stream->state);
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT == stream->weight);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_get_next_ob_item(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_priority_spec pri_spec;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+  session->remote_settings.max_concurrent_streams = 2;
+
+  CU_ASSERT(NULL == nghttp2_session_get_next_ob_item(session));
+  nghttp2_submit_ping(session, NGHTTP2_FLAG_NONE, NULL);
+  CU_ASSERT(NGHTTP2_PING ==
+            nghttp2_session_get_next_ob_item(session)->frame.hd.type);
+
+  CU_ASSERT(1 == nghttp2_submit_request(session, NULL, NULL, 0, NULL, NULL));
+  CU_ASSERT(NGHTTP2_PING ==
+            nghttp2_session_get_next_ob_item(session)->frame.hd.type);
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(NULL == nghttp2_session_get_next_ob_item(session));
+
+  /* Incoming stream does not affect the number of outgoing max
+     concurrent streams. */
+  open_recv_stream(session, 2);
+
+  nghttp2_priority_spec_init(&pri_spec, 0, NGHTTP2_MAX_WEIGHT, 0);
+
+  CU_ASSERT(3 ==
+            nghttp2_submit_request(session, &pri_spec, NULL, 0, NULL, NULL));
+  CU_ASSERT(NGHTTP2_HEADERS ==
+            nghttp2_session_get_next_ob_item(session)->frame.hd.type);
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  CU_ASSERT(5 ==
+            nghttp2_submit_request(session, &pri_spec, NULL, 0, NULL, NULL));
+  CU_ASSERT(NULL == nghttp2_session_get_next_ob_item(session));
+
+  session->remote_settings.max_concurrent_streams = 3;
+
+  CU_ASSERT(NGHTTP2_HEADERS ==
+            nghttp2_session_get_next_ob_item(session)->frame.hd.type);
+
+  nghttp2_session_del(session);
+
+  /* Check that push reply HEADERS are queued into ob_ss_pq */
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+  session->remote_settings.max_concurrent_streams = 0;
+  open_sent_stream2(session, 2, NGHTTP2_STREAM_RESERVED);
+  CU_ASSERT(0 == nghttp2_submit_headers(session, NGHTTP2_FLAG_END_STREAM, 2,
+                                        NULL, NULL, 0, NULL));
+  CU_ASSERT(NULL == nghttp2_session_get_next_ob_item(session));
+  CU_ASSERT(1 == nghttp2_outbound_queue_size(&session->ob_syn));
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_pop_next_ob_item(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_outbound_item *item;
+  nghttp2_priority_spec pri_spec;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+  session->remote_settings.max_concurrent_streams = 1;
+
+  CU_ASSERT(NULL == nghttp2_session_pop_next_ob_item(session));
+
+  nghttp2_submit_ping(session, NGHTTP2_FLAG_NONE, NULL);
+
+  nghttp2_priority_spec_init(&pri_spec, 0, 254, 0);
+
+  nghttp2_submit_request(session, &pri_spec, NULL, 0, NULL, NULL);
+
+  item = nghttp2_session_pop_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_PING == item->frame.hd.type);
+  nghttp2_outbound_item_free(item, mem);
+  mem->free(item, NULL);
+
+  item = nghttp2_session_pop_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_HEADERS == item->frame.hd.type);
+  nghttp2_outbound_item_free(item, mem);
+  mem->free(item, NULL);
+
+  CU_ASSERT(NULL == nghttp2_session_pop_next_ob_item(session));
+
+  /* Incoming stream does not affect the number of outgoing max
+     concurrent streams. */
+  open_recv_stream(session, 4);
+  /* In-flight outgoing stream */
+  open_sent_stream(session, 1);
+
+  nghttp2_priority_spec_init(&pri_spec, 0, NGHTTP2_MAX_WEIGHT, 0);
+
+  nghttp2_submit_request(session, &pri_spec, NULL, 0, NULL, NULL);
+
+  CU_ASSERT(NULL == nghttp2_session_pop_next_ob_item(session));
+
+  session->remote_settings.max_concurrent_streams = 2;
+
+  item = nghttp2_session_pop_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_HEADERS == item->frame.hd.type);
+  nghttp2_outbound_item_free(item, mem);
+  mem->free(item, NULL);
+
+  nghttp2_session_del(session);
+
+  /* Check that push reply HEADERS are queued into ob_ss_pq */
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+  session->remote_settings.max_concurrent_streams = 0;
+  open_sent_stream2(session, 2, NGHTTP2_STREAM_RESERVED);
+  CU_ASSERT(0 == nghttp2_submit_headers(session, NGHTTP2_FLAG_END_STREAM, 2,
+                                        NULL, NULL, 0, NULL));
+  CU_ASSERT(NULL == nghttp2_session_pop_next_ob_item(session));
+  CU_ASSERT(1 == nghttp2_outbound_queue_size(&session->ob_syn));
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_reply_fail(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_data_provider data_prd;
+  my_user_data ud;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = fail_send_callback;
+
+  data_prd.read_callback = fixed_length_data_source_read_callback;
+  ud.data_source_length = 4 * 1024;
+  CU_ASSERT(0 == nghttp2_session_server_new(&session, &callbacks, &ud));
+  open_recv_stream2(session, 1, NGHTTP2_STREAM_OPENING);
+  CU_ASSERT(0 == nghttp2_submit_response(session, 1, NULL, 0, &data_prd));
+  CU_ASSERT(NGHTTP2_ERR_CALLBACK_FAILURE == nghttp2_session_send(session));
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_max_concurrent_streams(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_frame frame;
+  nghttp2_outbound_item *item;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+  open_recv_stream(session, 1);
+
+  /* Check un-ACKed SETTINGS_MAX_CONCURRENT_STREAMS */
+  nghttp2_frame_headers_init(&frame.headers, NGHTTP2_FLAG_END_HEADERS, 3,
+                             NGHTTP2_HCAT_HEADERS, NULL, NULL, 0);
+  session->pending_local_max_concurrent_stream = 1;
+
+  CU_ASSERT(NGHTTP2_ERR_IGN_HEADER_BLOCK ==
+            nghttp2_session_on_request_headers_received(session, &frame));
+
+  item = nghttp2_outbound_queue_top(&session->ob_reg);
+  CU_ASSERT(NGHTTP2_RST_STREAM == item->frame.hd.type);
+  CU_ASSERT(NGHTTP2_REFUSED_STREAM == item->frame.rst_stream.error_code);
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  /* Check ACKed SETTINGS_MAX_CONCURRENT_STREAMS */
+  session->local_settings.max_concurrent_streams = 1;
+  frame.hd.stream_id = 5;
+
+  CU_ASSERT(NGHTTP2_ERR_IGN_HEADER_BLOCK ==
+            nghttp2_session_on_request_headers_received(session, &frame));
+
+  item = nghttp2_outbound_queue_top(&session->ob_reg);
+  CU_ASSERT(NGHTTP2_GOAWAY == item->frame.hd.type);
+  CU_ASSERT(NGHTTP2_PROTOCOL_ERROR == item->frame.goaway.error_code);
+
+  nghttp2_frame_headers_free(&frame.headers, mem);
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_stop_data_with_rst_stream(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data ud;
+  nghttp2_data_provider data_prd;
+  nghttp2_frame frame;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.on_frame_send_callback = on_frame_send_callback;
+  callbacks.send_callback = block_count_send_callback;
+  data_prd.read_callback = fixed_length_data_source_read_callback;
+
+  ud.frame_send_cb_called = 0;
+  ud.data_source_length = NGHTTP2_DATA_PAYLOADLEN * 4;
+
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+  open_recv_stream2(session, 1, NGHTTP2_STREAM_OPENING);
+  nghttp2_submit_response(session, 1, NULL, 0, &data_prd);
+
+  ud.block_count = 2;
+  /* Sends response HEADERS + DATA[0] */
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(NGHTTP2_DATA == ud.sent_frame_type);
+  /* data for DATA[1] is read from data_prd but it is not sent */
+  CU_ASSERT(ud.data_source_length == NGHTTP2_DATA_PAYLOADLEN * 2);
+
+  nghttp2_frame_rst_stream_init(&frame.rst_stream, 1, NGHTTP2_CANCEL);
+  CU_ASSERT(0 == nghttp2_session_on_rst_stream_received(session, &frame));
+  nghttp2_frame_rst_stream_free(&frame.rst_stream);
+
+  /* Big enough number to send all DATA frames potentially. */
+  ud.block_count = 100;
+  /* Nothing will be sent in the following call. */
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  /* With RST_STREAM, stream is canceled and further DATA on that
+     stream are not sent. */
+  CU_ASSERT(ud.data_source_length == NGHTTP2_DATA_PAYLOADLEN * 2);
+
+  CU_ASSERT(NULL == nghttp2_session_get_stream(session, 1));
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_defer_data(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data ud;
+  nghttp2_data_provider data_prd;
+  nghttp2_outbound_item *item;
+  nghttp2_stream *stream;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.on_frame_send_callback = on_frame_send_callback;
+  callbacks.send_callback = block_count_send_callback;
+  data_prd.read_callback = defer_data_source_read_callback;
+
+  ud.frame_send_cb_called = 0;
+  ud.data_source_length = NGHTTP2_DATA_PAYLOADLEN * 4;
+
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+  stream = open_recv_stream2(session, 1, NGHTTP2_STREAM_OPENING);
+
+  session->remote_window_size = 1 << 20;
+  stream->remote_window_size = 1 << 20;
+
+  nghttp2_submit_response(session, 1, NULL, 0, &data_prd);
+
+  ud.block_count = 1;
+  /* Sends HEADERS reply */
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(NGHTTP2_HEADERS == ud.sent_frame_type);
+  /* No data is read */
+  CU_ASSERT(ud.data_source_length == NGHTTP2_DATA_PAYLOADLEN * 4);
+
+  ud.block_count = 1;
+  nghttp2_submit_ping(session, NGHTTP2_FLAG_NONE, NULL);
+  /* Sends PING */
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(NGHTTP2_PING == ud.sent_frame_type);
+
+  /* Resume deferred DATA */
+  CU_ASSERT(0 == nghttp2_session_resume_data(session, 1));
+  item = stream->item;
+  item->aux_data.data.data_prd.read_callback =
+      fixed_length_data_source_read_callback;
+  ud.block_count = 1;
+  /* Reads 2 DATA chunks */
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(ud.data_source_length == NGHTTP2_DATA_PAYLOADLEN * 2);
+
+  /* Deferred again */
+  item->aux_data.data.data_prd.read_callback = defer_data_source_read_callback;
+  /* This is needed since 16KiB block is already read and waiting to be
+     sent. No read_callback invocation. */
+  ud.block_count = 1;
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(ud.data_source_length == NGHTTP2_DATA_PAYLOADLEN * 2);
+
+  /* Resume deferred DATA */
+  CU_ASSERT(0 == nghttp2_session_resume_data(session, 1));
+  item->aux_data.data.data_prd.read_callback =
+      fixed_length_data_source_read_callback;
+  ud.block_count = 1;
+  /* Reads 2 16KiB blocks */
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(ud.data_source_length == 0);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_flow_control(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data ud;
+  nghttp2_data_provider data_prd;
+  nghttp2_frame frame;
+  nghttp2_stream *stream;
+  int32_t new_initial_window_size;
+  nghttp2_settings_entry iv[1];
+  nghttp2_frame settings_frame;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = fixed_bytes_send_callback;
+  callbacks.on_frame_send_callback = on_frame_send_callback;
+  data_prd.read_callback = fixed_length_data_source_read_callback;
+
+  ud.frame_send_cb_called = 0;
+  ud.data_source_length = 128 * 1024;
+  /* Use smaller emission count so that we can check outbound flow
+     control window calculation is correct. */
+  ud.fixed_sendlen = 2 * 1024;
+
+  /* Initial window size to 64KiB - 1*/
+  nghttp2_session_client_new(&session, &callbacks, &ud);
+  /* Change it to 64KiB for easy calculation */
+  session->remote_window_size = 64 * 1024;
+  session->remote_settings.initial_window_size = 64 * 1024;
+
+  nghttp2_submit_request(session, NULL, NULL, 0, &data_prd, NULL);
+
+  /* Sends 64KiB - 1 data */
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(64 * 1024 == ud.data_source_length);
+
+  /* Back 32KiB in stream window */
+  nghttp2_frame_window_update_init(&frame.window_update, NGHTTP2_FLAG_NONE, 1,
+                                   32 * 1024);
+  nghttp2_session_on_window_update_received(session, &frame);
+
+  /* Send nothing because of connection-level window */
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(64 * 1024 == ud.data_source_length);
+
+  /* Back 32KiB in connection-level window */
+  frame.hd.stream_id = 0;
+  nghttp2_session_on_window_update_received(session, &frame);
+
+  /* Sends another 32KiB data */
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(32 * 1024 == ud.data_source_length);
+
+  stream = nghttp2_session_get_stream(session, 1);
+  /* Change initial window size to 16KiB. The window_size becomes
+     negative. */
+  new_initial_window_size = 16 * 1024;
+  stream->remote_window_size =
+      new_initial_window_size -
+      ((int32_t)session->remote_settings.initial_window_size -
+       stream->remote_window_size);
+  session->remote_settings.initial_window_size =
+      (uint32_t)new_initial_window_size;
+  CU_ASSERT(-48 * 1024 == stream->remote_window_size);
+
+  /* Back 48KiB to stream window */
+  frame.hd.stream_id = 1;
+  frame.window_update.window_size_increment = 48 * 1024;
+  nghttp2_session_on_window_update_received(session, &frame);
+
+  /* Nothing is sent because window_size is 0 */
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(32 * 1024 == ud.data_source_length);
+
+  /* Back 16KiB in stream window */
+  frame.hd.stream_id = 1;
+  frame.window_update.window_size_increment = 16 * 1024;
+  nghttp2_session_on_window_update_received(session, &frame);
+
+  /* Back 24KiB in connection-level window */
+  frame.hd.stream_id = 0;
+  frame.window_update.window_size_increment = 24 * 1024;
+  nghttp2_session_on_window_update_received(session, &frame);
+
+  /* Sends another 16KiB data */
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(16 * 1024 == ud.data_source_length);
+
+  /* Increase initial window size to 32KiB */
+  iv[0].settings_id = NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE;
+  iv[0].value = 32 * 1024;
+
+  nghttp2_frame_settings_init(&settings_frame.settings, NGHTTP2_FLAG_NONE,
+                              dup_iv(iv, 1), 1);
+  nghttp2_session_on_settings_received(session, &settings_frame, 1);
+  nghttp2_frame_settings_free(&settings_frame.settings, mem);
+
+  /* Sends another 8KiB data */
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(8 * 1024 == ud.data_source_length);
+
+  /* Back 8KiB in connection-level window */
+  frame.hd.stream_id = 0;
+  frame.window_update.window_size_increment = 8 * 1024;
+  nghttp2_session_on_window_update_received(session, &frame);
+
+  /* Sends last 8KiB data */
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(0 == ud.data_source_length);
+  CU_ASSERT(nghttp2_session_get_stream(session, 1)->shut_flags &
+            NGHTTP2_SHUT_WR);
+
+  nghttp2_frame_window_update_free(&frame.window_update);
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_flow_control_data_recv(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  uint8_t data[64 * 1024 + 16];
+  nghttp2_frame_hd hd;
+  nghttp2_outbound_item *item;
+  nghttp2_stream *stream;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  /* Initial window size to 64KiB - 1*/
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+
+  stream = open_sent_stream(session, 1);
+
+  nghttp2_stream_shutdown(stream, NGHTTP2_SHUT_WR);
+
+  session->local_window_size = NGHTTP2_MAX_PAYLOADLEN;
+  stream->local_window_size = NGHTTP2_MAX_PAYLOADLEN;
+
+  /* Create DATA frame */
+  memset(data, 0, sizeof(data));
+  nghttp2_frame_hd_init(&hd, NGHTTP2_MAX_PAYLOADLEN, NGHTTP2_DATA,
+                        NGHTTP2_FLAG_END_STREAM, 1);
+
+  nghttp2_frame_pack_frame_hd(data, &hd);
+  CU_ASSERT(NGHTTP2_MAX_PAYLOADLEN + NGHTTP2_FRAME_HDLEN ==
+            nghttp2_session_mem_recv(
+                session, data, NGHTTP2_MAX_PAYLOADLEN + NGHTTP2_FRAME_HDLEN));
+
+  item = nghttp2_session_get_next_ob_item(session);
+  /* Since this is the last frame, stream-level WINDOW_UPDATE is not
+     issued, but connection-level is. */
+  CU_ASSERT(NGHTTP2_WINDOW_UPDATE == item->frame.hd.type);
+  CU_ASSERT(0 == item->frame.hd.stream_id);
+  CU_ASSERT(NGHTTP2_MAX_PAYLOADLEN ==
+            item->frame.window_update.window_size_increment);
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  /* Receive DATA for closed stream. They are still subject to under
+     connection-level flow control, since this situation arises when
+     RST_STREAM is issued by the remote, but the local side keeps
+     sending DATA frames. Without calculating connection-level window,
+     the subsequent flow control gets confused. */
+  CU_ASSERT(NGHTTP2_MAX_PAYLOADLEN + NGHTTP2_FRAME_HDLEN ==
+            nghttp2_session_mem_recv(
+                session, data, NGHTTP2_MAX_PAYLOADLEN + NGHTTP2_FRAME_HDLEN));
+
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_WINDOW_UPDATE == item->frame.hd.type);
+  CU_ASSERT(0 == item->frame.hd.stream_id);
+  CU_ASSERT(NGHTTP2_MAX_PAYLOADLEN ==
+            item->frame.window_update.window_size_increment);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_flow_control_data_with_padding_recv(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  uint8_t data[1024];
+  nghttp2_frame_hd hd;
+  nghttp2_stream *stream;
+  nghttp2_option *option;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  nghttp2_option_new(&option);
+  /* Disable auto window update so that we can check padding is
+     consumed automatically */
+  nghttp2_option_set_no_auto_window_update(option, 1);
+
+  /* Initial window size to 64KiB - 1*/
+  nghttp2_session_client_new2(&session, &callbacks, NULL, option);
+
+  nghttp2_option_del(option);
+
+  stream = open_sent_stream(session, 1);
+
+  /* Create DATA frame */
+  memset(data, 0, sizeof(data));
+  nghttp2_frame_hd_init(&hd, 357, NGHTTP2_DATA, NGHTTP2_FLAG_PADDED, 1);
+
+  nghttp2_frame_pack_frame_hd(data, &hd);
+  /* Set Pad Length field, which itself is padding */
+  data[NGHTTP2_FRAME_HDLEN] = 255;
+
+  CU_ASSERT(
+      (ssize_t)(NGHTTP2_FRAME_HDLEN + hd.length) ==
+      nghttp2_session_mem_recv(session, data, NGHTTP2_FRAME_HDLEN + hd.length));
+
+  CU_ASSERT((int32_t)hd.length == session->recv_window_size);
+  CU_ASSERT((int32_t)hd.length == stream->recv_window_size);
+  CU_ASSERT(256 == session->consumed_size);
+  CU_ASSERT(256 == stream->consumed_size);
+  CU_ASSERT(357 == session->recv_window_size);
+  CU_ASSERT(357 == stream->recv_window_size);
+
+  /* Receive the same DATA frame, but in 2 parts: first 9 + 1 + 102
+     bytes which includes 1st padding byte, and remainder */
+  CU_ASSERT((ssize_t)(NGHTTP2_FRAME_HDLEN + 103) ==
+            nghttp2_session_mem_recv(session, data, NGHTTP2_FRAME_HDLEN + 103));
+  CU_ASSERT(258 == session->consumed_size);
+  CU_ASSERT(258 == stream->consumed_size);
+  CU_ASSERT(460 == session->recv_window_size);
+  CU_ASSERT(460 == stream->recv_window_size);
+
+  /* 357 - 103 = 254 bytes left */
+  CU_ASSERT(254 == nghttp2_session_mem_recv(session, data, 254));
+  CU_ASSERT(512 == session->consumed_size);
+  CU_ASSERT(512 == stream->consumed_size);
+  CU_ASSERT(714 == session->recv_window_size);
+  CU_ASSERT(714 == stream->recv_window_size);
+
+  /* Receive the same DATA frame, but in 2 parts: first 9 = 1 + 101
+     bytes which only includes data without padding, 2nd part is
+     padding only */
+  CU_ASSERT((ssize_t)(NGHTTP2_FRAME_HDLEN + 102) ==
+            nghttp2_session_mem_recv(session, data, NGHTTP2_FRAME_HDLEN + 102));
+  CU_ASSERT(513 == session->consumed_size);
+  CU_ASSERT(513 == stream->consumed_size);
+  CU_ASSERT(816 == session->recv_window_size);
+  CU_ASSERT(816 == stream->recv_window_size);
+
+  /* 357 - 102 = 255 bytes left */
+  CU_ASSERT(255 == nghttp2_session_mem_recv(session, data, 255));
+  CU_ASSERT(768 == session->consumed_size);
+  CU_ASSERT(768 == stream->consumed_size);
+  CU_ASSERT(1071 == session->recv_window_size);
+  CU_ASSERT(1071 == stream->recv_window_size);
+
+  /* Receive the same DATA frame, but in 2 parts: first 9 = 1 + 50
+     bytes which includes byte up to middle of data, 2nd part is the
+     remainder */
+  CU_ASSERT((ssize_t)(NGHTTP2_FRAME_HDLEN + 51) ==
+            nghttp2_session_mem_recv(session, data, NGHTTP2_FRAME_HDLEN + 51));
+  CU_ASSERT(769 == session->consumed_size);
+  CU_ASSERT(769 == stream->consumed_size);
+  CU_ASSERT(1122 == session->recv_window_size);
+  CU_ASSERT(1122 == stream->recv_window_size);
+
+  /* 357 - 51 = 306 bytes left */
+  CU_ASSERT(306 == nghttp2_session_mem_recv(session, data, 306));
+  CU_ASSERT(1024 == session->consumed_size);
+  CU_ASSERT(1024 == stream->consumed_size);
+  CU_ASSERT(1428 == session->recv_window_size);
+  CU_ASSERT(1428 == stream->recv_window_size);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_data_read_temporal_failure(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data ud;
+  nghttp2_data_provider data_prd;
+  nghttp2_frame frame;
+  nghttp2_stream *stream;
+  size_t data_size = 128 * 1024;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+  callbacks.on_frame_send_callback = on_frame_send_callback;
+  data_prd.read_callback = fixed_length_data_source_read_callback;
+
+  ud.data_source_length = data_size;
+
+  /* Initial window size is 64KiB - 1 */
+  nghttp2_session_client_new(&session, &callbacks, &ud);
+  nghttp2_submit_request(session, NULL, NULL, 0, &data_prd, NULL);
+
+  /* Sends NGHTTP2_INITIAL_WINDOW_SIZE data, assuming, it is equal to
+     or smaller than NGHTTP2_INITIAL_CONNECTION_WINDOW_SIZE */
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(data_size - NGHTTP2_INITIAL_WINDOW_SIZE == ud.data_source_length);
+
+  stream = nghttp2_session_get_stream(session, 1);
+  CU_ASSERT(NGHTTP2_DATA == stream->item->frame.hd.type);
+
+  stream->item->aux_data.data.data_prd.read_callback =
+      temporal_failure_data_source_read_callback;
+
+  /* Back NGHTTP2_INITIAL_WINDOW_SIZE to both connection-level and
+     stream-wise window */
+  nghttp2_frame_window_update_init(&frame.window_update, NGHTTP2_FLAG_NONE, 1,
+                                   NGHTTP2_INITIAL_WINDOW_SIZE);
+  nghttp2_session_on_window_update_received(session, &frame);
+  frame.hd.stream_id = 0;
+  nghttp2_session_on_window_update_received(session, &frame);
+  nghttp2_frame_window_update_free(&frame.window_update);
+
+  /* Sending data will fail (soft fail) and treated as stream error */
+  ud.frame_send_cb_called = 0;
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(data_size - NGHTTP2_INITIAL_WINDOW_SIZE == ud.data_source_length);
+
+  CU_ASSERT(1 == ud.frame_send_cb_called);
+  CU_ASSERT(NGHTTP2_RST_STREAM == ud.sent_frame_type);
+
+  data_prd.read_callback = fail_data_source_read_callback;
+  nghttp2_submit_request(session, NULL, NULL, 0, &data_prd, NULL);
+  /* Sending data will fail (hard fail) and session tear down */
+  CU_ASSERT(NGHTTP2_ERR_CALLBACK_FAILURE == nghttp2_session_send(session));
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_on_stream_close(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data user_data;
+  nghttp2_stream *stream;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.on_stream_close_callback = on_stream_close_callback;
+  user_data.stream_close_cb_called = 0;
+
+  nghttp2_session_client_new(&session, &callbacks, &user_data);
+  stream =
+      open_sent_stream3(session, 1, NGHTTP2_STREAM_FLAG_NONE, &pri_spec_default,
+                        NGHTTP2_STREAM_OPENED, &user_data);
+  CU_ASSERT(stream != NULL);
+  CU_ASSERT(nghttp2_session_close_stream(session, 1, NGHTTP2_NO_ERROR) == 0);
+  CU_ASSERT(user_data.stream_close_cb_called == 1);
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_on_ctrl_not_send(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data user_data;
+  nghttp2_stream *stream;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.on_frame_not_send_callback = on_frame_not_send_callback;
+  callbacks.send_callback = null_send_callback;
+  user_data.frame_not_send_cb_called = 0;
+  user_data.not_sent_frame_type = 0;
+  user_data.not_sent_error = 0;
+
+  nghttp2_session_server_new(&session, &callbacks, &user_data);
+  stream =
+      open_recv_stream3(session, 1, NGHTTP2_STREAM_FLAG_NONE, &pri_spec_default,
+                        NGHTTP2_STREAM_OPENING, &user_data);
+
+  /* Check response HEADERS */
+  /* Send bogus stream ID */
+  CU_ASSERT(0 == nghttp2_submit_headers(session, NGHTTP2_FLAG_END_STREAM, 3,
+                                        NULL, NULL, 0, NULL));
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(1 == user_data.frame_not_send_cb_called);
+  CU_ASSERT(NGHTTP2_HEADERS == user_data.not_sent_frame_type);
+  CU_ASSERT(NGHTTP2_ERR_STREAM_CLOSED == user_data.not_sent_error);
+
+  user_data.frame_not_send_cb_called = 0;
+  /* Shutdown transmission */
+  stream->shut_flags |= NGHTTP2_SHUT_WR;
+  CU_ASSERT(0 == nghttp2_submit_headers(session, NGHTTP2_FLAG_END_STREAM, 1,
+                                        NULL, NULL, 0, NULL));
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(1 == user_data.frame_not_send_cb_called);
+  CU_ASSERT(NGHTTP2_HEADERS == user_data.not_sent_frame_type);
+  CU_ASSERT(NGHTTP2_ERR_STREAM_SHUT_WR == user_data.not_sent_error);
+
+  stream->shut_flags = NGHTTP2_SHUT_NONE;
+  user_data.frame_not_send_cb_called = 0;
+  /* Queue RST_STREAM */
+  CU_ASSERT(0 == nghttp2_submit_headers(session, NGHTTP2_FLAG_END_STREAM, 1,
+                                        NULL, NULL, 0, NULL));
+  CU_ASSERT(0 == nghttp2_submit_rst_stream(session, NGHTTP2_FLAG_NONE, 1,
+                                           NGHTTP2_INTERNAL_ERROR));
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(1 == user_data.frame_not_send_cb_called);
+  CU_ASSERT(NGHTTP2_HEADERS == user_data.not_sent_frame_type);
+  CU_ASSERT(NGHTTP2_ERR_STREAM_CLOSING == user_data.not_sent_error);
+
+  nghttp2_session_del(session);
+
+  /* Check request HEADERS */
+  user_data.frame_not_send_cb_called = 0;
+  CU_ASSERT(nghttp2_session_client_new(&session, &callbacks, &user_data) == 0);
+  /* Maximum Stream ID is reached */
+  session->next_stream_id = (1u << 31) + 1;
+  CU_ASSERT(NGHTTP2_ERR_STREAM_ID_NOT_AVAILABLE ==
+            nghttp2_submit_headers(session, NGHTTP2_FLAG_END_STREAM, -1, NULL,
+                                   NULL, 0, NULL));
+
+  user_data.frame_not_send_cb_called = 0;
+  /* GOAWAY received */
+  session->goaway_flags |= NGHTTP2_GOAWAY_RECV;
+  session->next_stream_id = 9;
+
+  CU_ASSERT(0 < nghttp2_submit_headers(session, NGHTTP2_FLAG_END_STREAM, -1,
+                                       NULL, NULL, 0, NULL));
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(1 == user_data.frame_not_send_cb_called);
+  CU_ASSERT(NGHTTP2_HEADERS == user_data.not_sent_frame_type);
+  CU_ASSERT(NGHTTP2_ERR_START_STREAM_NOT_ALLOWED == user_data.not_sent_error);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_get_outbound_queue_size(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  CU_ASSERT(0 == nghttp2_session_client_new(&session, &callbacks, NULL));
+  CU_ASSERT(0 == nghttp2_session_get_outbound_queue_size(session));
+
+  CU_ASSERT(0 == nghttp2_submit_ping(session, NGHTTP2_FLAG_NONE, NULL));
+  CU_ASSERT(1 == nghttp2_session_get_outbound_queue_size(session));
+
+  CU_ASSERT(0 == nghttp2_submit_goaway(session, NGHTTP2_FLAG_NONE, 2,
+                                       NGHTTP2_NO_ERROR, NULL, 0));
+  CU_ASSERT(2 == nghttp2_session_get_outbound_queue_size(session));
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_get_effective_local_window_size(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_stream *stream;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  CU_ASSERT(0 == nghttp2_session_client_new(&session, &callbacks, NULL));
+
+  stream = open_sent_stream(session, 1);
+
+  CU_ASSERT(NGHTTP2_INITIAL_CONNECTION_WINDOW_SIZE ==
+            nghttp2_session_get_effective_local_window_size(session));
+  CU_ASSERT(0 == nghttp2_session_get_effective_recv_data_length(session));
+
+  CU_ASSERT(NGHTTP2_INITIAL_WINDOW_SIZE ==
+            nghttp2_session_get_stream_effective_local_window_size(session, 1));
+  CU_ASSERT(0 ==
+            nghttp2_session_get_stream_effective_recv_data_length(session, 1));
+
+  /* Check connection flow control */
+  session->recv_window_size = 100;
+  nghttp2_submit_window_update(session, NGHTTP2_FLAG_NONE, 0, 1100);
+
+  CU_ASSERT(NGHTTP2_INITIAL_CONNECTION_WINDOW_SIZE + 1000 ==
+            nghttp2_session_get_effective_local_window_size(session));
+  CU_ASSERT(NGHTTP2_INITIAL_CONNECTION_WINDOW_SIZE + 1000 ==
+            nghttp2_session_get_local_window_size(session));
+  CU_ASSERT(0 == nghttp2_session_get_effective_recv_data_length(session));
+
+  nghttp2_submit_window_update(session, NGHTTP2_FLAG_NONE, 0, -50);
+  /* Now session->recv_window_size = -50 */
+  CU_ASSERT(-50 == session->recv_window_size);
+  CU_ASSERT(50 == session->recv_reduction);
+  CU_ASSERT(NGHTTP2_INITIAL_CONNECTION_WINDOW_SIZE + 950 ==
+            nghttp2_session_get_effective_local_window_size(session));
+  CU_ASSERT(NGHTTP2_INITIAL_CONNECTION_WINDOW_SIZE + 1000 ==
+            nghttp2_session_get_local_window_size(session));
+  CU_ASSERT(0 == nghttp2_session_get_effective_recv_data_length(session));
+
+  session->recv_window_size += 50;
+
+  /* Now session->recv_window_size = 0 */
+
+  CU_ASSERT(NGHTTP2_INITIAL_CONNECTION_WINDOW_SIZE + 950 ==
+            nghttp2_session_get_local_window_size(session));
+
+  nghttp2_submit_window_update(session, NGHTTP2_FLAG_NONE, 0, 100);
+  CU_ASSERT(50 == session->recv_window_size);
+  CU_ASSERT(0 == session->recv_reduction);
+  CU_ASSERT(NGHTTP2_INITIAL_CONNECTION_WINDOW_SIZE + 1050 ==
+            nghttp2_session_get_effective_local_window_size(session));
+  CU_ASSERT(NGHTTP2_INITIAL_CONNECTION_WINDOW_SIZE + 1000 ==
+            nghttp2_session_get_local_window_size(session));
+  CU_ASSERT(50 == nghttp2_session_get_effective_recv_data_length(session));
+
+  /* Check stream flow control */
+  stream->recv_window_size = 100;
+  nghttp2_submit_window_update(session, NGHTTP2_FLAG_NONE, 1, 1100);
+
+  CU_ASSERT(NGHTTP2_INITIAL_WINDOW_SIZE + 1000 ==
+            nghttp2_session_get_stream_effective_local_window_size(session, 1));
+  CU_ASSERT(NGHTTP2_INITIAL_WINDOW_SIZE + 1000 ==
+            nghttp2_session_get_stream_local_window_size(session, 1));
+  CU_ASSERT(0 ==
+            nghttp2_session_get_stream_effective_recv_data_length(session, 1));
+
+  nghttp2_submit_window_update(session, NGHTTP2_FLAG_NONE, 1, -50);
+  /* Now stream->recv_window_size = -50 */
+  CU_ASSERT(NGHTTP2_INITIAL_WINDOW_SIZE + 950 ==
+            nghttp2_session_get_stream_effective_local_window_size(session, 1));
+  CU_ASSERT(NGHTTP2_INITIAL_WINDOW_SIZE + 1000 ==
+            nghttp2_session_get_stream_local_window_size(session, 1));
+  CU_ASSERT(0 ==
+            nghttp2_session_get_stream_effective_recv_data_length(session, 1));
+
+  stream->recv_window_size += 50;
+  /* Now stream->recv_window_size = 0 */
+  nghttp2_submit_window_update(session, NGHTTP2_FLAG_NONE, 1, 100);
+  CU_ASSERT(NGHTTP2_INITIAL_WINDOW_SIZE + 1050 ==
+            nghttp2_session_get_stream_effective_local_window_size(session, 1));
+  CU_ASSERT(NGHTTP2_INITIAL_WINDOW_SIZE + 1000 ==
+            nghttp2_session_get_stream_local_window_size(session, 1));
+  CU_ASSERT(50 ==
+            nghttp2_session_get_stream_effective_recv_data_length(session, 1));
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_set_option(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_option *option;
+  nghttp2_hd_deflater *deflater;
+  int rv;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  /* Test for nghttp2_option_set_no_auto_window_update */
+  nghttp2_option_new(&option);
+  nghttp2_option_set_no_auto_window_update(option, 1);
+
+  nghttp2_session_client_new2(&session, &callbacks, NULL, option);
+
+  CU_ASSERT(session->opt_flags & NGHTTP2_OPTMASK_NO_AUTO_WINDOW_UPDATE);
+
+  nghttp2_session_del(session);
+  nghttp2_option_del(option);
+
+  /* Test for nghttp2_option_set_peer_max_concurrent_streams */
+  nghttp2_option_new(&option);
+  nghttp2_option_set_peer_max_concurrent_streams(option, 100);
+
+  nghttp2_session_client_new2(&session, &callbacks, NULL, option);
+
+  CU_ASSERT(100 == session->remote_settings.max_concurrent_streams);
+  nghttp2_session_del(session);
+  nghttp2_option_del(option);
+
+  /* Test for nghttp2_option_set_max_reserved_remote_streams */
+  nghttp2_option_new(&option);
+  nghttp2_option_set_max_reserved_remote_streams(option, 99);
+
+  nghttp2_session_client_new2(&session, &callbacks, NULL, option);
+
+  CU_ASSERT(99 == session->max_incoming_reserved_streams);
+  nghttp2_session_del(session);
+  nghttp2_option_del(option);
+
+  /* Test for nghttp2_option_set_no_auto_ping_ack */
+  nghttp2_option_new(&option);
+  nghttp2_option_set_no_auto_ping_ack(option, 1);
+
+  nghttp2_session_client_new2(&session, &callbacks, NULL, option);
+
+  CU_ASSERT(session->opt_flags & NGHTTP2_OPTMASK_NO_AUTO_PING_ACK);
+
+  nghttp2_session_del(session);
+  nghttp2_option_del(option);
+
+  /* Test for nghttp2_option_set_max_deflate_dynamic_table_size */
+  nghttp2_option_new(&option);
+  nghttp2_option_set_max_deflate_dynamic_table_size(option, 0);
+
+  nghttp2_session_client_new2(&session, &callbacks, NULL, option);
+
+  deflater = &session->hd_deflater;
+
+  rv = nghttp2_submit_request(session, NULL, reqnv, ARRLEN(reqnv), NULL, NULL);
+
+  CU_ASSERT(1 == rv);
+
+  rv = nghttp2_session_send(session);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(0 == deflater->deflate_hd_table_bufsize_max);
+  CU_ASSERT(0 == deflater->ctx.hd_table_bufsize);
+
+  nghttp2_session_del(session);
+  nghttp2_option_del(option);
+}
+
+void test_nghttp2_session_data_backoff_by_high_pri_frame(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data ud;
+  nghttp2_data_provider data_prd;
+  nghttp2_stream *stream;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = block_count_send_callback;
+  callbacks.on_frame_send_callback = on_frame_send_callback;
+  data_prd.read_callback = fixed_length_data_source_read_callback;
+
+  ud.frame_send_cb_called = 0;
+  ud.data_source_length = NGHTTP2_DATA_PAYLOADLEN * 4;
+
+  nghttp2_session_client_new(&session, &callbacks, &ud);
+  nghttp2_submit_request(session, NULL, NULL, 0, &data_prd, NULL);
+
+  session->remote_window_size = 1 << 20;
+
+  ud.block_count = 2;
+  /* Sends request HEADERS + DATA[0] */
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  stream = nghttp2_session_get_stream(session, 1);
+  stream->remote_window_size = 1 << 20;
+
+  CU_ASSERT(NGHTTP2_DATA == ud.sent_frame_type);
+  /* data for DATA[1] is read from data_prd but it is not sent */
+  CU_ASSERT(ud.data_source_length == NGHTTP2_DATA_PAYLOADLEN * 2);
+
+  nghttp2_submit_ping(session, NGHTTP2_FLAG_NONE, NULL);
+  ud.block_count = 2;
+  /* Sends DATA[1] + PING, PING is interleaved in DATA sequence */
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(NGHTTP2_PING == ud.sent_frame_type);
+  /* data for DATA[2] is read from data_prd but it is not sent */
+  CU_ASSERT(ud.data_source_length == NGHTTP2_DATA_PAYLOADLEN);
+
+  ud.block_count = 2;
+  /* Sends DATA[2..3] */
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  CU_ASSERT(stream->shut_flags & NGHTTP2_SHUT_WR);
+
+  nghttp2_session_del(session);
+}
+
+static void check_session_recv_data_with_padding(nghttp2_bufs *bufs,
+                                                 size_t datalen,
+                                                 nghttp2_mem *mem) {
+  nghttp2_session *session;
+  my_user_data ud;
+  nghttp2_session_callbacks callbacks;
+  uint8_t *in;
+  size_t inlen;
+
+  memset(&callbacks, 0, sizeof(callbacks));
+  callbacks.on_frame_recv_callback = on_frame_recv_callback;
+  callbacks.on_data_chunk_recv_callback = on_data_chunk_recv_callback;
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+
+  open_recv_stream(session, 1);
+
+  inlen = (size_t)nghttp2_bufs_remove(bufs, &in);
+
+  ud.frame_recv_cb_called = 0;
+  ud.data_chunk_len = 0;
+
+  CU_ASSERT((ssize_t)inlen == nghttp2_session_mem_recv(session, in, inlen));
+
+  CU_ASSERT(1 == ud.frame_recv_cb_called);
+  CU_ASSERT(datalen == ud.data_chunk_len);
+
+  mem->free(in, NULL);
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_pack_data_with_padding(void) {
+  nghttp2_session *session;
+  my_user_data ud;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_data_provider data_prd;
+  nghttp2_frame *frame;
+  size_t datalen = 55;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+
+  memset(&callbacks, 0, sizeof(callbacks));
+  callbacks.send_callback = block_count_send_callback;
+  callbacks.on_frame_send_callback = on_frame_send_callback;
+  callbacks.select_padding_callback = select_padding_callback;
+
+  data_prd.read_callback = fixed_length_data_source_read_callback;
+
+  nghttp2_session_client_new(&session, &callbacks, &ud);
+
+  ud.padlen = 63;
+
+  nghttp2_submit_request(session, NULL, NULL, 0, &data_prd, NULL);
+  ud.block_count = 1;
+  ud.data_source_length = datalen;
+  /* Sends HEADERS */
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(NGHTTP2_HEADERS == ud.sent_frame_type);
+
+  frame = &session->aob.item->frame;
+
+  CU_ASSERT(ud.padlen == frame->data.padlen);
+  CU_ASSERT(frame->hd.flags & NGHTTP2_FLAG_PADDED);
+
+  /* Check reception of this DATA frame */
+  check_session_recv_data_with_padding(&session->aob.framebufs, datalen, mem);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_pack_headers_with_padding(void) {
+  nghttp2_session *session, *sv_session;
+  accumulator acc;
+  my_user_data ud;
+  nghttp2_session_callbacks callbacks;
+
+  memset(&callbacks, 0, sizeof(callbacks));
+  callbacks.send_callback = accumulator_send_callback;
+  callbacks.on_frame_send_callback = on_frame_send_callback;
+  callbacks.select_padding_callback = select_padding_callback;
+  callbacks.on_frame_recv_callback = on_frame_recv_callback;
+
+  acc.length = 0;
+  ud.acc = &acc;
+
+  nghttp2_session_client_new(&session, &callbacks, &ud);
+  nghttp2_session_server_new(&sv_session, &callbacks, &ud);
+
+  ud.padlen = 163;
+
+  CU_ASSERT(1 == nghttp2_submit_request(session, NULL, reqnv, ARRLEN(reqnv),
+                                        NULL, NULL));
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  CU_ASSERT(acc.length < NGHTTP2_MAX_PAYLOADLEN);
+  ud.frame_recv_cb_called = 0;
+  CU_ASSERT((ssize_t)acc.length ==
+            nghttp2_session_mem_recv(sv_session, acc.buf, acc.length));
+  CU_ASSERT(1 == ud.frame_recv_cb_called);
+  CU_ASSERT(NULL == nghttp2_session_get_next_ob_item(sv_session));
+
+  nghttp2_session_del(sv_session);
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_pack_settings_payload(void) {
+  nghttp2_settings_entry iv[2];
+  uint8_t buf[64];
+  ssize_t len;
+  nghttp2_settings_entry *resiv;
+  size_t resniv;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+
+  iv[0].settings_id = NGHTTP2_SETTINGS_HEADER_TABLE_SIZE;
+  iv[0].value = 1023;
+  iv[1].settings_id = NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE;
+  iv[1].value = 4095;
+
+  len = nghttp2_pack_settings_payload(buf, sizeof(buf), iv, 2);
+  CU_ASSERT(2 * NGHTTP2_FRAME_SETTINGS_ENTRY_LENGTH == len);
+  CU_ASSERT(0 == nghttp2_frame_unpack_settings_payload2(&resiv, &resniv, buf,
+                                                        (size_t)len, mem));
+  CU_ASSERT(2 == resniv);
+  CU_ASSERT(NGHTTP2_SETTINGS_HEADER_TABLE_SIZE == resiv[0].settings_id);
+  CU_ASSERT(1023 == resiv[0].value);
+  CU_ASSERT(NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE == resiv[1].settings_id);
+  CU_ASSERT(4095 == resiv[1].value);
+
+  mem->free(resiv, NULL);
+
+  len = nghttp2_pack_settings_payload(buf, 9 /* too small */, iv, 2);
+  CU_ASSERT(NGHTTP2_ERR_INSUFF_BUFSIZE == len);
+}
+
+#define check_stream_dep_sib(STREAM, DEP_PREV, DEP_NEXT, SIB_PREV, SIB_NEXT)   \
+  do {                                                                         \
+    CU_ASSERT(DEP_PREV == STREAM->dep_prev);                                   \
+    CU_ASSERT(DEP_NEXT == STREAM->dep_next);                                   \
+    CU_ASSERT(SIB_PREV == STREAM->sib_prev);                                   \
+    CU_ASSERT(SIB_NEXT == STREAM->sib_next);                                   \
+  } while (0)
+
+/* nghttp2_stream_dep_add() and its families functions should be
+   tested in nghttp2_stream_test.c, but it is easier to use
+   nghttp2_session_open_stream().  Therefore, we test them here. */
+void test_nghttp2_session_stream_dep_add(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_stream *a, *b, *c, *d, *e, *root;
+
+  memset(&callbacks, 0, sizeof(callbacks));
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  root = &session->root;
+
+  a = open_stream(session, 1);
+
+  c = open_stream_with_dep(session, 5, a);
+  b = open_stream_with_dep(session, 3, a);
+  d = open_stream_with_dep(session, 7, c);
+
+  /* a
+   * |
+   * b--c
+   *    |
+   *    d
+   */
+
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT * 2 == a->sum_dep_weight);
+  CU_ASSERT(0 == b->sum_dep_weight);
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT == c->sum_dep_weight);
+  CU_ASSERT(0 == d->sum_dep_weight);
+
+  check_stream_dep_sib(a, root, b, NULL, NULL);
+  check_stream_dep_sib(b, a, NULL, NULL, c);
+  check_stream_dep_sib(c, a, d, b, NULL);
+  check_stream_dep_sib(d, c, NULL, NULL, NULL);
+
+  CU_ASSERT(a == session->root.dep_next);
+
+  e = open_stream_with_dep_excl(session, 9, a);
+
+  /* a
+   * |
+   * e
+   * |
+   * b--c
+   *    |
+   *    d
+   */
+
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT == a->sum_dep_weight);
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT * 2 == e->sum_dep_weight);
+  CU_ASSERT(0 == b->sum_dep_weight);
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT == c->sum_dep_weight);
+  CU_ASSERT(0 == d->sum_dep_weight);
+
+  check_stream_dep_sib(a, root, e, NULL, NULL);
+  check_stream_dep_sib(e, a, b, NULL, NULL);
+  check_stream_dep_sib(b, e, NULL, NULL, c);
+  check_stream_dep_sib(c, e, d, b, NULL);
+  check_stream_dep_sib(d, c, NULL, NULL, NULL);
+
+  CU_ASSERT(a == session->root.dep_next);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_stream_dep_remove(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_stream *a, *b, *c, *d, *e, *f, *root;
+
+  memset(&callbacks, 0, sizeof(callbacks));
+
+  /* Remove root */
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  root = &session->root;
+
+  a = open_stream(session, 1);
+  b = open_stream_with_dep(session, 3, a);
+  c = open_stream_with_dep(session, 5, a);
+  d = open_stream_with_dep(session, 7, c);
+
+  /* a
+   * |
+   * c--b
+   * |
+   * d
+   */
+
+  nghttp2_stream_dep_remove(a);
+
+  /* becomes:
+   * c    b
+   * |
+   * d
+   */
+
+  CU_ASSERT(0 == a->sum_dep_weight);
+  CU_ASSERT(0 == b->sum_dep_weight);
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT == c->sum_dep_weight);
+  CU_ASSERT(0 == d->sum_dep_weight);
+
+  check_stream_dep_sib(a, NULL, NULL, NULL, NULL);
+  check_stream_dep_sib(b, root, NULL, c, NULL);
+  check_stream_dep_sib(c, root, d, NULL, b);
+  check_stream_dep_sib(d, c, NULL, NULL, NULL);
+
+  CU_ASSERT(c == session->root.dep_next);
+
+  nghttp2_session_del(session);
+
+  /* Remove right most stream */
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  root = &session->root;
+
+  a = open_stream(session, 1);
+  b = open_stream_with_dep(session, 3, a);
+  c = open_stream_with_dep(session, 5, a);
+  d = open_stream_with_dep(session, 7, c);
+
+  /* a
+   * |
+   * c--b
+   * |
+   * d
+   */
+
+  nghttp2_stream_dep_remove(b);
+
+  /* becomes:
+   * a
+   * |
+   * c
+   * |
+   * d
+   */
+
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT == a->sum_dep_weight);
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT == c->sum_dep_weight);
+  CU_ASSERT(0 == d->sum_dep_weight);
+  CU_ASSERT(0 == b->sum_dep_weight);
+
+  check_stream_dep_sib(a, root, c, NULL, NULL);
+  check_stream_dep_sib(b, NULL, NULL, NULL, NULL);
+  check_stream_dep_sib(c, a, d, NULL, NULL);
+  check_stream_dep_sib(d, c, NULL, NULL, NULL);
+
+  CU_ASSERT(a == session->root.dep_next);
+
+  nghttp2_session_del(session);
+
+  /* Remove left most stream */
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  root = &session->root;
+
+  a = open_stream(session, 1);
+  b = open_stream_with_dep(session, 3, a);
+  c = open_stream_with_dep(session, 5, a);
+  d = open_stream_with_dep(session, 7, c);
+  e = open_stream_with_dep(session, 9, c);
+
+  /* a
+   * |
+   * c--b
+   * |
+   * e--d
+   */
+
+  nghttp2_stream_dep_remove(c);
+
+  /* becomes:
+   * a
+   * |
+   * e--d--b
+   */
+
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT * 2 == a->sum_dep_weight);
+  CU_ASSERT(0 == b->sum_dep_weight);
+  CU_ASSERT(0 == d->sum_dep_weight);
+  CU_ASSERT(0 == c->sum_dep_weight);
+  CU_ASSERT(0 == e->sum_dep_weight);
+
+  check_stream_dep_sib(a, root, e, NULL, NULL);
+  check_stream_dep_sib(b, a, NULL, d, NULL);
+  check_stream_dep_sib(c, NULL, NULL, NULL, NULL);
+  check_stream_dep_sib(d, a, NULL, e, b);
+  check_stream_dep_sib(e, a, NULL, NULL, d);
+
+  nghttp2_session_del(session);
+
+  /* Remove middle stream */
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  root = &session->root;
+
+  a = open_stream(session, 1);
+  b = open_stream_with_dep(session, 3, a);
+  c = open_stream_with_dep(session, 5, a);
+  d = open_stream_with_dep(session, 7, a);
+  e = open_stream_with_dep(session, 9, c);
+  f = open_stream_with_dep(session, 11, c);
+
+  /* a
+   * |
+   * d--c--b
+   *    |
+   *    f--e
+   */
+
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT * 3 == a->sum_dep_weight);
+  CU_ASSERT(0 == b->sum_dep_weight);
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT * 2 == c->sum_dep_weight);
+  CU_ASSERT(0 == d->sum_dep_weight);
+  CU_ASSERT(0 == e->sum_dep_weight);
+  CU_ASSERT(0 == f->sum_dep_weight);
+
+  nghttp2_stream_dep_remove(c);
+
+  /* becomes:
+   * a
+   * |
+   * d--f--e--b
+   */
+
+  /* c's weight 16 is distributed evenly to e and f.  Each weight of e
+     and f becomes 8. */
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT * 2 + 8 * 2 == a->sum_dep_weight);
+  CU_ASSERT(0 == b->sum_dep_weight);
+  CU_ASSERT(0 == c->sum_dep_weight);
+  CU_ASSERT(0 == d->sum_dep_weight);
+  CU_ASSERT(0 == e->sum_dep_weight);
+  CU_ASSERT(0 == f->sum_dep_weight);
+
+  check_stream_dep_sib(a, root, d, NULL, NULL);
+  check_stream_dep_sib(b, a, NULL, e, NULL);
+  check_stream_dep_sib(c, NULL, NULL, NULL, NULL);
+  check_stream_dep_sib(e, a, NULL, f, b);
+  check_stream_dep_sib(f, a, NULL, d, e);
+  check_stream_dep_sib(d, a, NULL, NULL, f);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_stream_dep_add_subtree(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_stream *a, *b, *c, *d, *e, *f, *root;
+
+  memset(&callbacks, 0, sizeof(callbacks));
+
+  /* dep_stream has dep_next */
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  root = &session->root;
+
+  a = open_stream(session, 1);
+  b = open_stream_with_dep(session, 3, a);
+  c = open_stream_with_dep(session, 5, a);
+  d = open_stream_with_dep(session, 7, c);
+
+  e = open_stream(session, 9);
+  f = open_stream_with_dep(session, 11, e);
+
+  /* a         e
+   * |         |
+   * c--b      f
+   * |
+   * d
+   */
+
+  nghttp2_stream_dep_remove_subtree(e);
+  nghttp2_stream_dep_add_subtree(a, e);
+
+  /* becomes
+   * a
+   * |
+   * e--c--b
+   * |  |
+   * f  d
+   */
+
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT * 3 == a->sum_dep_weight);
+  CU_ASSERT(0 == b->sum_dep_weight);
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT == c->sum_dep_weight);
+  CU_ASSERT(0 == d->sum_dep_weight);
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT == e->sum_dep_weight);
+  CU_ASSERT(0 == f->sum_dep_weight);
+
+  check_stream_dep_sib(a, root, e, NULL, NULL);
+  check_stream_dep_sib(b, a, NULL, c, NULL);
+  check_stream_dep_sib(c, a, d, e, b);
+  check_stream_dep_sib(d, c, NULL, NULL, NULL);
+  check_stream_dep_sib(e, a, f, NULL, c);
+  check_stream_dep_sib(f, e, NULL, NULL, NULL);
+
+  nghttp2_session_del(session);
+
+  /* dep_stream has dep_next and now we insert subtree */
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  root = &session->root;
+
+  a = open_stream(session, 1);
+  b = open_stream_with_dep(session, 3, a);
+  c = open_stream_with_dep(session, 5, a);
+  d = open_stream_with_dep(session, 7, c);
+
+  e = open_stream(session, 9);
+  f = open_stream_with_dep(session, 11, e);
+
+  /* a         e
+   * |         |
+   * c--b      f
+   * |
+   * d
+   */
+
+  nghttp2_stream_dep_remove_subtree(e);
+  nghttp2_stream_dep_insert_subtree(a, e);
+
+  /* becomes
+   * a
+   * |
+   * e
+   * |
+   * f--c--b
+   *    |
+   *    d
+   */
+
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT == a->sum_dep_weight);
+  CU_ASSERT(0 == b->sum_dep_weight);
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT == c->sum_dep_weight);
+  CU_ASSERT(0 == d->sum_dep_weight);
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT * 3 == e->sum_dep_weight);
+  CU_ASSERT(0 == f->sum_dep_weight);
+
+  check_stream_dep_sib(a, root, e, NULL, NULL);
+  check_stream_dep_sib(e, a, f, NULL, NULL);
+  check_stream_dep_sib(f, e, NULL, NULL, c);
+  check_stream_dep_sib(b, e, NULL, c, NULL);
+  check_stream_dep_sib(c, e, d, f, b);
+  check_stream_dep_sib(d, c, NULL, NULL, NULL);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_stream_dep_remove_subtree(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_stream *a, *b, *c, *d, *e, *root;
+
+  memset(&callbacks, 0, sizeof(callbacks));
+
+  /* Remove left most stream */
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  root = &session->root;
+
+  a = open_stream(session, 1);
+  b = open_stream_with_dep(session, 3, a);
+  c = open_stream_with_dep(session, 5, a);
+  d = open_stream_with_dep(session, 7, c);
+
+  /* a
+   * |
+   * c--b
+   * |
+   * d
+   */
+
+  nghttp2_stream_dep_remove_subtree(c);
+
+  /* becomes
+   * a  c
+   * |  |
+   * b  d
+   */
+
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT == a->sum_dep_weight);
+  CU_ASSERT(0 == b->sum_dep_weight);
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT == c->sum_dep_weight);
+  CU_ASSERT(0 == d->sum_dep_weight);
+
+  check_stream_dep_sib(a, root, b, NULL, NULL);
+  check_stream_dep_sib(b, a, NULL, NULL, NULL);
+  check_stream_dep_sib(c, NULL, d, NULL, NULL);
+  check_stream_dep_sib(d, c, NULL, NULL, NULL);
+
+  nghttp2_session_del(session);
+
+  /* Remove right most stream */
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  root = &session->root;
+
+  a = open_stream(session, 1);
+  b = open_stream_with_dep(session, 3, a);
+  c = open_stream_with_dep(session, 5, a);
+  d = open_stream_with_dep(session, 7, c);
+
+  /* a
+   * |
+   * c--b
+   * |
+   * d
+   */
+
+  nghttp2_stream_dep_remove_subtree(b);
+
+  /* becomes
+   * a  b
+   * |
+   * c
+   * |
+   * d
+   */
+
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT == a->sum_dep_weight);
+  CU_ASSERT(0 == b->sum_dep_weight);
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT == c->sum_dep_weight);
+  CU_ASSERT(0 == d->sum_dep_weight);
+
+  check_stream_dep_sib(a, root, c, NULL, NULL);
+  check_stream_dep_sib(c, a, d, NULL, NULL);
+  check_stream_dep_sib(d, c, NULL, NULL, NULL);
+  check_stream_dep_sib(b, NULL, NULL, NULL, NULL);
+
+  nghttp2_session_del(session);
+
+  /* Remove middle stream */
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  root = &session->root;
+
+  a = open_stream(session, 1);
+  e = open_stream_with_dep(session, 9, a);
+  c = open_stream_with_dep(session, 5, a);
+  b = open_stream_with_dep(session, 3, a);
+  d = open_stream_with_dep(session, 7, c);
+
+  /* a
+   * |
+   * b--c--e
+   *    |
+   *    d
+   */
+
+  nghttp2_stream_dep_remove_subtree(c);
+
+  /* becomes
+   * a     c
+   * |     |
+   * b--e  d
+   */
+
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT * 2 == a->sum_dep_weight);
+  CU_ASSERT(0 == b->sum_dep_weight);
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT == c->sum_dep_weight);
+  CU_ASSERT(0 == d->sum_dep_weight);
+  CU_ASSERT(0 == e->sum_dep_weight);
+
+  check_stream_dep_sib(a, root, b, NULL, NULL);
+  check_stream_dep_sib(b, a, NULL, NULL, e);
+  check_stream_dep_sib(e, a, NULL, b, NULL);
+  check_stream_dep_sib(c, NULL, d, NULL, NULL);
+  check_stream_dep_sib(d, c, NULL, NULL, NULL);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_stream_dep_all_your_stream_are_belong_to_us(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_stream *a, *b, *c, *d, *root;
+  nghttp2_outbound_item *db, *dc;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+
+  memset(&callbacks, 0, sizeof(callbacks));
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  root = &session->root;
+
+  a = open_stream(session, 1);
+  b = open_stream_with_dep(session, 3, a);
+
+  c = open_stream(session, 5);
+
+  /* a     c
+   * |
+   * b
+   */
+
+  nghttp2_stream_dep_remove_subtree(c);
+  CU_ASSERT(0 == nghttp2_stream_dep_insert_subtree(&session->root, c));
+
+  /*
+   * c
+   * |
+   * a
+   * |
+   * b
+   */
+
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT == c->sum_dep_weight);
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT == a->sum_dep_weight);
+  CU_ASSERT(0 == b->sum_dep_weight);
+
+  CU_ASSERT(nghttp2_pq_empty(&a->obq));
+  CU_ASSERT(nghttp2_pq_empty(&b->obq));
+  CU_ASSERT(nghttp2_pq_empty(&c->obq));
+
+  check_stream_dep_sib(c, root, a, NULL, NULL);
+  check_stream_dep_sib(a, c, b, NULL, NULL);
+  check_stream_dep_sib(b, a, NULL, NULL, NULL);
+
+  nghttp2_session_del(session);
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  root = &session->root;
+
+  a = open_stream(session, 1);
+  b = open_stream(session, 3);
+  c = open_stream(session, 5);
+
+  /*
+   * a  b   c
+   */
+
+  nghttp2_stream_dep_remove_subtree(c);
+  CU_ASSERT(0 == nghttp2_stream_dep_insert_subtree(&session->root, c));
+
+  /*
+   * c
+   * |
+   * b--a
+   */
+
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT * 2 == c->sum_dep_weight);
+  CU_ASSERT(0 == b->sum_dep_weight);
+  CU_ASSERT(0 == a->sum_dep_weight);
+
+  CU_ASSERT(nghttp2_pq_empty(&a->obq));
+  CU_ASSERT(nghttp2_pq_empty(&b->obq));
+  CU_ASSERT(nghttp2_pq_empty(&c->obq));
+
+  check_stream_dep_sib(c, root, b, NULL, NULL);
+  check_stream_dep_sib(b, c, NULL, NULL, a);
+  check_stream_dep_sib(a, c, NULL, b, NULL);
+
+  nghttp2_session_del(session);
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  root = &session->root;
+
+  a = open_stream(session, 1);
+  b = open_stream_with_dep(session, 3, a);
+
+  c = open_stream(session, 5);
+  d = open_stream_with_dep(session, 7, c);
+
+  /* a     c
+   * |     |
+   * b     d
+   */
+
+  nghttp2_stream_dep_remove_subtree(c);
+  CU_ASSERT(0 == nghttp2_stream_dep_insert_subtree(&session->root, c));
+
+  /*
+   * c
+   * |
+   * d--a
+   *    |
+   *    b
+   */
+
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT * 2 == c->sum_dep_weight);
+  CU_ASSERT(0 == d->sum_dep_weight);
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT == a->sum_dep_weight);
+  CU_ASSERT(0 == b->sum_dep_weight);
+
+  CU_ASSERT(nghttp2_pq_empty(&a->obq));
+  CU_ASSERT(nghttp2_pq_empty(&b->obq));
+  CU_ASSERT(nghttp2_pq_empty(&c->obq));
+  CU_ASSERT(nghttp2_pq_empty(&d->obq));
+
+  check_stream_dep_sib(c, root, d, NULL, NULL);
+  check_stream_dep_sib(d, c, NULL, NULL, a);
+  check_stream_dep_sib(a, c, b, d, NULL);
+  check_stream_dep_sib(b, a, NULL, NULL, NULL);
+
+  nghttp2_session_del(session);
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  root = &session->root;
+
+  a = open_stream(session, 1);
+  b = open_stream_with_dep(session, 3, a);
+
+  c = open_stream(session, 5);
+  d = open_stream_with_dep(session, 7, c);
+
+  /* a     c
+   * |     |
+   * b     d
+   */
+
+  db = create_data_ob_item(mem);
+
+  nghttp2_stream_attach_item(b, db);
+
+  nghttp2_stream_dep_remove_subtree(c);
+  CU_ASSERT(0 == nghttp2_stream_dep_insert_subtree(&session->root, c));
+
+  /*
+   * c
+   * |
+   * d--a
+   *    |
+   *    b
+   */
+
+  CU_ASSERT(c->queued);
+  CU_ASSERT(a->queued);
+  CU_ASSERT(b->queued);
+  CU_ASSERT(!d->queued);
+
+  CU_ASSERT(1 == nghttp2_pq_size(&a->obq));
+  CU_ASSERT(1 == nghttp2_pq_size(&c->obq));
+  CU_ASSERT(nghttp2_pq_empty(&d->obq));
+
+  check_stream_dep_sib(c, root, d, NULL, NULL);
+  check_stream_dep_sib(d, c, NULL, NULL, a);
+  check_stream_dep_sib(a, c, b, d, NULL);
+  check_stream_dep_sib(b, a, NULL, NULL, NULL);
+
+  nghttp2_session_del(session);
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  root = &session->root;
+
+  a = open_stream(session, 1);
+  b = open_stream_with_dep(session, 3, a);
+
+  c = open_stream(session, 5);
+  d = open_stream_with_dep(session, 7, c);
+
+  /* a     c
+   * |     |
+   * b     d
+   */
+
+  db = create_data_ob_item(mem);
+  dc = create_data_ob_item(mem);
+
+  nghttp2_stream_attach_item(b, db);
+  nghttp2_stream_attach_item(c, dc);
+
+  nghttp2_stream_dep_remove_subtree(c);
+  CU_ASSERT(0 == nghttp2_stream_dep_insert_subtree(&session->root, c));
+
+  /*
+   * c
+   * |
+   * d--a
+   *    |
+   *    b
+   */
+
+  CU_ASSERT(c->queued);
+  CU_ASSERT(a->queued);
+  CU_ASSERT(b->queued);
+  CU_ASSERT(!d->queued);
+
+  check_stream_dep_sib(c, root, d, NULL, NULL);
+  check_stream_dep_sib(d, c, NULL, NULL, a);
+  check_stream_dep_sib(a, c, b, d, NULL);
+  check_stream_dep_sib(b, a, NULL, NULL, NULL);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_stream_attach_item(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_stream *a, *b, *c, *d, *e;
+  nghttp2_outbound_item *da, *db, *dc, *dd;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+
+  memset(&callbacks, 0, sizeof(callbacks));
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  a = open_stream(session, 1);
+  b = open_stream_with_dep(session, 3, a);
+  c = open_stream_with_dep(session, 5, a);
+  d = open_stream_with_dep(session, 7, c);
+
+  /* a
+   * |
+   * c--b
+   * |
+   * d
+   */
+
+  db = create_data_ob_item(mem);
+
+  nghttp2_stream_attach_item(b, db);
+
+  CU_ASSERT(a->queued);
+  CU_ASSERT(b->queued);
+  CU_ASSERT(!c->queued);
+  CU_ASSERT(!d->queued);
+
+  CU_ASSERT(1 == nghttp2_pq_size(&a->obq));
+
+  /* Attach item to c */
+  dc = create_data_ob_item(mem);
+
+  nghttp2_stream_attach_item(c, dc);
+
+  CU_ASSERT(a->queued);
+  CU_ASSERT(b->queued);
+  CU_ASSERT(c->queued);
+  CU_ASSERT(!d->queued);
+
+  CU_ASSERT(2 == nghttp2_pq_size(&a->obq));
+
+  /* Attach item to a */
+  da = create_data_ob_item(mem);
+
+  nghttp2_stream_attach_item(a, da);
+
+  CU_ASSERT(a->queued);
+  CU_ASSERT(b->queued);
+  CU_ASSERT(c->queued);
+  CU_ASSERT(!d->queued);
+
+  CU_ASSERT(2 == nghttp2_pq_size(&a->obq));
+
+  /* Detach item from a */
+  nghttp2_stream_detach_item(a);
+
+  CU_ASSERT(a->queued);
+  CU_ASSERT(b->queued);
+  CU_ASSERT(c->queued);
+  CU_ASSERT(!d->queued);
+
+  CU_ASSERT(2 == nghttp2_pq_size(&a->obq));
+
+  /* Attach item to d */
+  dd = create_data_ob_item(mem);
+
+  nghttp2_stream_attach_item(d, dd);
+
+  CU_ASSERT(a->queued);
+  CU_ASSERT(b->queued);
+  CU_ASSERT(c->queued);
+  CU_ASSERT(d->queued);
+
+  CU_ASSERT(2 == nghttp2_pq_size(&a->obq));
+  CU_ASSERT(1 == nghttp2_pq_size(&c->obq));
+
+  /* Detach item from c */
+  nghttp2_stream_detach_item(c);
+
+  CU_ASSERT(a->queued);
+  CU_ASSERT(b->queued);
+  CU_ASSERT(c->queued);
+  CU_ASSERT(d->queued);
+
+  CU_ASSERT(2 == nghttp2_pq_size(&a->obq));
+  CU_ASSERT(1 == nghttp2_pq_size(&c->obq));
+
+  /* Detach item from b */
+  nghttp2_stream_detach_item(b);
+
+  CU_ASSERT(a->queued);
+  CU_ASSERT(!b->queued);
+  CU_ASSERT(c->queued);
+  CU_ASSERT(d->queued);
+
+  CU_ASSERT(1 == nghttp2_pq_size(&a->obq));
+
+  /* exercises insertion */
+  e = open_stream_with_dep_excl(session, 9, a);
+
+  /* a
+   * |
+   * e
+   * |
+   * c--b
+   * |
+   * d
+   */
+
+  CU_ASSERT(a->queued);
+  CU_ASSERT(e->queued);
+  CU_ASSERT(!b->queued);
+  CU_ASSERT(c->queued);
+  CU_ASSERT(d->queued);
+
+  CU_ASSERT(1 == nghttp2_pq_size(&a->obq));
+  CU_ASSERT(1 == nghttp2_pq_size(&e->obq));
+  CU_ASSERT(nghttp2_pq_empty(&b->obq));
+  CU_ASSERT(1 == nghttp2_pq_size(&c->obq));
+  CU_ASSERT(nghttp2_pq_empty(&d->obq));
+
+  /* exercises deletion */
+  nghttp2_stream_dep_remove(e);
+
+  /* a
+   * |
+   * c--b
+   * |
+   * d
+   */
+
+  CU_ASSERT(a->queued);
+  CU_ASSERT(!b->queued);
+  CU_ASSERT(c->queued);
+  CU_ASSERT(d->queued);
+
+  CU_ASSERT(1 == nghttp2_pq_size(&a->obq));
+  CU_ASSERT(nghttp2_pq_empty(&b->obq));
+  CU_ASSERT(1 == nghttp2_pq_size(&c->obq));
+  CU_ASSERT(nghttp2_pq_empty(&d->obq));
+
+  /* e's weight 16 is distributed equally among c and b, both now have
+     weight 8 each. */
+  CU_ASSERT(8 == b->weight);
+  CU_ASSERT(8 == c->weight);
+
+  /* da, db, dc have been detached */
+  nghttp2_outbound_item_free(da, mem);
+  nghttp2_outbound_item_free(db, mem);
+  nghttp2_outbound_item_free(dc, mem);
+  free(da);
+  free(db);
+  free(dc);
+
+  nghttp2_session_del(session);
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  a = open_stream(session, 1);
+  b = open_stream_with_dep(session, 3, a);
+  c = open_stream_with_dep(session, 5, a);
+  d = open_stream_with_dep(session, 7, c);
+
+  /* a
+   * |
+   * c--b
+   * |
+   * d
+   */
+
+  da = create_data_ob_item(mem);
+  db = create_data_ob_item(mem);
+  dc = create_data_ob_item(mem);
+
+  nghttp2_stream_attach_item(a, da);
+  nghttp2_stream_attach_item(b, db);
+  nghttp2_stream_attach_item(c, dc);
+
+  CU_ASSERT(a->queued);
+  CU_ASSERT(b->queued);
+  CU_ASSERT(c->queued);
+  CU_ASSERT(!d->queued);
+
+  CU_ASSERT(2 == nghttp2_pq_size(&a->obq));
+  CU_ASSERT(nghttp2_pq_empty(&b->obq));
+  CU_ASSERT(nghttp2_pq_empty(&c->obq));
+  CU_ASSERT(nghttp2_pq_empty(&d->obq));
+
+  /* Detach item from a */
+  nghttp2_stream_detach_item(a);
+
+  CU_ASSERT(a->queued);
+  CU_ASSERT(b->queued);
+  CU_ASSERT(c->queued);
+  CU_ASSERT(!d->queued);
+
+  CU_ASSERT(2 == nghttp2_pq_size(&a->obq));
+  CU_ASSERT(nghttp2_pq_empty(&b->obq));
+  CU_ASSERT(nghttp2_pq_empty(&c->obq));
+  CU_ASSERT(nghttp2_pq_empty(&d->obq));
+
+  /* da has been detached */
+  nghttp2_outbound_item_free(da, mem);
+  free(da);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_stream_attach_item_subtree(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_stream *a, *b, *c, *d, *e, *f;
+  nghttp2_outbound_item *da, *db, *dd, *de;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+
+  memset(&callbacks, 0, sizeof(callbacks));
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  a = open_stream(session, 1);
+  b = open_stream_with_dep(session, 3, a);
+  c = open_stream_with_dep(session, 5, a);
+  d = open_stream_with_dep(session, 7, c);
+
+  e = open_stream_with_dep_weight(session, 9, 32, &session->root);
+  f = open_stream_with_dep(session, 11, e);
+
+  /*
+   * a        e
+   * |        |
+   * c--b     f
+   * |
+   * d
+   */
+
+  de = create_data_ob_item(mem);
+
+  nghttp2_stream_attach_item(e, de);
+
+  db = create_data_ob_item(mem);
+
+  nghttp2_stream_attach_item(b, db);
+
+  CU_ASSERT(a->queued);
+  CU_ASSERT(b->queued);
+  CU_ASSERT(!c->queued);
+  CU_ASSERT(!d->queued);
+  CU_ASSERT(e->queued);
+  CU_ASSERT(!f->queued);
+
+  CU_ASSERT(1 == nghttp2_pq_size(&a->obq));
+  CU_ASSERT(nghttp2_pq_empty(&b->obq));
+  CU_ASSERT(nghttp2_pq_empty(&c->obq));
+  CU_ASSERT(nghttp2_pq_empty(&d->obq));
+  CU_ASSERT(nghttp2_pq_empty(&e->obq));
+  CU_ASSERT(nghttp2_pq_empty(&f->obq));
+
+  /* Insert subtree e under a */
+
+  nghttp2_stream_dep_remove_subtree(e);
+  nghttp2_stream_dep_insert_subtree(a, e);
+
+  /*
+   * a
+   * |
+   * e
+   * |
+   * f--c--b
+   *    |
+   *    d
+   */
+
+  CU_ASSERT(a->queued);
+  CU_ASSERT(b->queued);
+  CU_ASSERT(!c->queued);
+  CU_ASSERT(!d->queued);
+  CU_ASSERT(e->queued);
+  CU_ASSERT(!f->queued);
+
+  CU_ASSERT(1 == nghttp2_pq_size(&a->obq));
+  CU_ASSERT(nghttp2_pq_empty(&b->obq));
+  CU_ASSERT(nghttp2_pq_empty(&c->obq));
+  CU_ASSERT(nghttp2_pq_empty(&d->obq));
+  CU_ASSERT(1 == nghttp2_pq_size(&e->obq));
+  CU_ASSERT(nghttp2_pq_empty(&f->obq));
+
+  /* Remove subtree b */
+
+  nghttp2_stream_dep_remove_subtree(b);
+
+  CU_ASSERT(0 == nghttp2_stream_dep_add_subtree(&session->root, b));
+
+  /*
+   * a       b
+   * |
+   * e
+   * |
+   * f--c
+   *    |
+   *    d
+   */
+
+  CU_ASSERT(a->queued);
+  CU_ASSERT(b->queued);
+  CU_ASSERT(!c->queued);
+  CU_ASSERT(!d->queued);
+  CU_ASSERT(e->queued);
+  CU_ASSERT(!f->queued);
+
+  CU_ASSERT(1 == nghttp2_pq_size(&a->obq));
+  CU_ASSERT(nghttp2_pq_empty(&b->obq));
+  CU_ASSERT(nghttp2_pq_empty(&c->obq));
+  CU_ASSERT(nghttp2_pq_empty(&d->obq));
+  CU_ASSERT(nghttp2_pq_empty(&e->obq));
+  CU_ASSERT(nghttp2_pq_empty(&f->obq));
+
+  /* Remove subtree a, and add it to root again */
+
+  nghttp2_stream_dep_remove_subtree(a);
+
+  CU_ASSERT(0 == nghttp2_stream_dep_add_subtree(&session->root, a));
+
+  CU_ASSERT(a->queued);
+  CU_ASSERT(b->queued);
+  CU_ASSERT(!c->queued);
+  CU_ASSERT(!d->queued);
+  CU_ASSERT(e->queued);
+  CU_ASSERT(!f->queued);
+
+  CU_ASSERT(1 == nghttp2_pq_size(&a->obq));
+  CU_ASSERT(nghttp2_pq_empty(&b->obq));
+  CU_ASSERT(nghttp2_pq_empty(&c->obq));
+  CU_ASSERT(nghttp2_pq_empty(&d->obq));
+  CU_ASSERT(nghttp2_pq_empty(&e->obq));
+  CU_ASSERT(nghttp2_pq_empty(&f->obq));
+
+  /* Remove subtree c */
+
+  nghttp2_stream_dep_remove_subtree(c);
+
+  CU_ASSERT(0 == nghttp2_stream_dep_add_subtree(&session->root, c));
+
+  /*
+   * a       b     c
+   * |             |
+   * e             d
+   * |
+   * f
+   */
+
+  CU_ASSERT(a->queued);
+  CU_ASSERT(b->queued);
+  CU_ASSERT(!c->queued);
+  CU_ASSERT(!d->queued);
+  CU_ASSERT(e->queued);
+  CU_ASSERT(!f->queued);
+
+  CU_ASSERT(1 == nghttp2_pq_size(&a->obq));
+  CU_ASSERT(nghttp2_pq_empty(&b->obq));
+  CU_ASSERT(nghttp2_pq_empty(&c->obq));
+  CU_ASSERT(nghttp2_pq_empty(&d->obq));
+  CU_ASSERT(nghttp2_pq_empty(&e->obq));
+  CU_ASSERT(nghttp2_pq_empty(&f->obq));
+
+  dd = create_data_ob_item(mem);
+
+  nghttp2_stream_attach_item(d, dd);
+
+  /* Add subtree c to a */
+
+  nghttp2_stream_dep_remove_subtree(c);
+  nghttp2_stream_dep_add_subtree(a, c);
+
+  /*
+   * a       b
+   * |
+   * c--e
+   * |  |
+   * d  f
+   */
+
+  CU_ASSERT(a->queued);
+  CU_ASSERT(b->queued);
+  CU_ASSERT(c->queued);
+  CU_ASSERT(d->queued);
+  CU_ASSERT(e->queued);
+  CU_ASSERT(!f->queued);
+
+  CU_ASSERT(2 == nghttp2_pq_size(&a->obq));
+  CU_ASSERT(nghttp2_pq_empty(&b->obq));
+  CU_ASSERT(1 == nghttp2_pq_size(&c->obq));
+  CU_ASSERT(nghttp2_pq_empty(&d->obq));
+  CU_ASSERT(nghttp2_pq_empty(&e->obq));
+  CU_ASSERT(nghttp2_pq_empty(&f->obq));
+
+  /* Insert b under a */
+
+  nghttp2_stream_dep_remove_subtree(b);
+  nghttp2_stream_dep_insert_subtree(a, b);
+
+  /*
+   * a
+   * |
+   * b
+   * |
+   * c--e
+   * |  |
+   * d  f
+   */
+
+  CU_ASSERT(a->queued);
+  CU_ASSERT(b->queued);
+  CU_ASSERT(c->queued);
+  CU_ASSERT(d->queued);
+  CU_ASSERT(e->queued);
+  CU_ASSERT(!f->queued);
+
+  CU_ASSERT(1 == nghttp2_pq_size(&a->obq));
+  CU_ASSERT(2 == nghttp2_pq_size(&b->obq));
+  CU_ASSERT(1 == nghttp2_pq_size(&c->obq));
+  CU_ASSERT(nghttp2_pq_empty(&d->obq));
+  CU_ASSERT(nghttp2_pq_empty(&e->obq));
+  CU_ASSERT(nghttp2_pq_empty(&f->obq));
+
+  /* Remove subtree b */
+
+  nghttp2_stream_dep_remove_subtree(b);
+  CU_ASSERT(0 == nghttp2_stream_dep_add_subtree(&session->root, b));
+
+  /*
+   * b       a
+   * |
+   * e--c
+   * |  |
+   * f  d
+   */
+
+  CU_ASSERT(!a->queued);
+  CU_ASSERT(b->queued);
+  CU_ASSERT(c->queued);
+  CU_ASSERT(d->queued);
+  CU_ASSERT(e->queued);
+  CU_ASSERT(!f->queued);
+
+  CU_ASSERT(nghttp2_pq_empty(&a->obq));
+  CU_ASSERT(2 == nghttp2_pq_size(&b->obq));
+  CU_ASSERT(1 == nghttp2_pq_size(&c->obq));
+  CU_ASSERT(nghttp2_pq_empty(&d->obq));
+  CU_ASSERT(nghttp2_pq_empty(&e->obq));
+  CU_ASSERT(nghttp2_pq_empty(&f->obq));
+
+  /* Remove subtree c, and detach item from b, and then re-add
+     subtree c under b */
+
+  nghttp2_stream_dep_remove_subtree(c);
+  nghttp2_stream_detach_item(b);
+  nghttp2_stream_dep_add_subtree(b, c);
+
+  /*
+   * b       a
+   * |
+   * e--c
+   * |  |
+   * f  d
+   */
+
+  CU_ASSERT(!a->queued);
+  CU_ASSERT(b->queued);
+  CU_ASSERT(c->queued);
+  CU_ASSERT(d->queued);
+  CU_ASSERT(e->queued);
+  CU_ASSERT(!f->queued);
+
+  CU_ASSERT(nghttp2_pq_empty(&a->obq));
+  CU_ASSERT(2 == nghttp2_pq_size(&b->obq));
+  CU_ASSERT(1 == nghttp2_pq_size(&c->obq));
+  CU_ASSERT(nghttp2_pq_empty(&d->obq));
+  CU_ASSERT(nghttp2_pq_empty(&e->obq));
+  CU_ASSERT(nghttp2_pq_empty(&f->obq));
+
+  /* Attach data to a, and add subtree a under b */
+
+  da = create_data_ob_item(mem);
+  nghttp2_stream_attach_item(a, da);
+  nghttp2_stream_dep_remove_subtree(a);
+  nghttp2_stream_dep_add_subtree(b, a);
+
+  /*
+   * b
+   * |
+   * a--e--c
+   *    |  |
+   *    f  d
+   */
+
+  CU_ASSERT(a->queued);
+  CU_ASSERT(b->queued);
+  CU_ASSERT(c->queued);
+  CU_ASSERT(d->queued);
+  CU_ASSERT(e->queued);
+  CU_ASSERT(!f->queued);
+
+  CU_ASSERT(nghttp2_pq_empty(&a->obq));
+  CU_ASSERT(3 == nghttp2_pq_size(&b->obq));
+  CU_ASSERT(1 == nghttp2_pq_size(&c->obq));
+  CU_ASSERT(nghttp2_pq_empty(&d->obq));
+  CU_ASSERT(nghttp2_pq_empty(&e->obq));
+  CU_ASSERT(nghttp2_pq_empty(&f->obq));
+
+  /* Remove subtree c, and add under f */
+  nghttp2_stream_dep_remove_subtree(c);
+  nghttp2_stream_dep_insert_subtree(f, c);
+
+  /*
+   * b
+   * |
+   * a--e
+   *    |
+   *    f
+   *    |
+   *    c
+   *    |
+   *    d
+   */
+
+  CU_ASSERT(a->queued);
+  CU_ASSERT(b->queued);
+  CU_ASSERT(c->queued);
+  CU_ASSERT(d->queued);
+  CU_ASSERT(e->queued);
+  CU_ASSERT(f->queued);
+
+  CU_ASSERT(nghttp2_pq_empty(&a->obq));
+  CU_ASSERT(2 == nghttp2_pq_size(&b->obq));
+  CU_ASSERT(1 == nghttp2_pq_size(&c->obq));
+  CU_ASSERT(nghttp2_pq_empty(&d->obq));
+  CU_ASSERT(1 == nghttp2_pq_size(&e->obq));
+  CU_ASSERT(1 == nghttp2_pq_size(&f->obq));
+
+  /* db has been detached */
+  nghttp2_outbound_item_free(db, mem);
+  free(db);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_stream_get_state(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_mem *mem;
+  nghttp2_hd_deflater deflater;
+  nghttp2_bufs bufs;
+  nghttp2_buf *buf;
+  nghttp2_stream *stream;
+  ssize_t rv;
+  nghttp2_data_provider data_prd;
+  nghttp2_frame frame;
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+  memset(&data_prd, 0, sizeof(data_prd));
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  CU_ASSERT(NGHTTP2_STREAM_STATE_IDLE ==
+            nghttp2_stream_get_state(nghttp2_session_get_root_stream(session)));
+
+  /* stream 1 HEADERS; without END_STREAM flag set */
+  pack_headers(&bufs, &deflater, 1, NGHTTP2_FLAG_END_HEADERS, reqnv,
+               ARRLEN(reqnv), mem);
+
+  buf = &bufs.head->buf;
+  rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(buf) == rv);
+
+  stream = nghttp2_session_find_stream(session, 1);
+
+  CU_ASSERT(NULL != stream);
+  CU_ASSERT(1 == stream->stream_id);
+  CU_ASSERT(NGHTTP2_STREAM_STATE_OPEN == nghttp2_stream_get_state(stream));
+
+  nghttp2_bufs_reset(&bufs);
+
+  /* stream 3 HEADERS; with END_STREAM flag set */
+  pack_headers(&bufs, &deflater, 3,
+               NGHTTP2_FLAG_END_HEADERS | NGHTTP2_FLAG_END_STREAM, reqnv,
+               ARRLEN(reqnv), mem);
+
+  buf = &bufs.head->buf;
+  rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(buf) == rv);
+
+  stream = nghttp2_session_find_stream(session, 3);
+
+  CU_ASSERT(NULL != stream);
+  CU_ASSERT(3 == stream->stream_id);
+  CU_ASSERT(NGHTTP2_STREAM_STATE_HALF_CLOSED_REMOTE ==
+            nghttp2_stream_get_state(stream));
+
+  nghttp2_bufs_reset(&bufs);
+
+  /* Respond to stream 1 */
+  nghttp2_submit_response(session, 1, resnv, ARRLEN(resnv), NULL);
+
+  rv = nghttp2_session_send(session);
+
+  CU_ASSERT(0 == rv);
+
+  stream = nghttp2_session_find_stream(session, 1);
+
+  CU_ASSERT(NGHTTP2_STREAM_STATE_HALF_CLOSED_LOCAL ==
+            nghttp2_stream_get_state(stream));
+
+  /* Respond to stream 3 */
+  nghttp2_submit_response(session, 3, resnv, ARRLEN(resnv), NULL);
+
+  rv = nghttp2_session_send(session);
+
+  CU_ASSERT(0 == rv);
+
+  stream = nghttp2_session_find_stream(session, 3);
+
+  CU_ASSERT(NGHTTP2_STREAM_STATE_CLOSED == nghttp2_stream_get_state(stream));
+
+  /* stream 5 HEADERS; with END_STREAM flag set */
+  pack_headers(&bufs, &deflater, 5,
+               NGHTTP2_FLAG_END_HEADERS | NGHTTP2_FLAG_END_STREAM, reqnv,
+               ARRLEN(reqnv), mem);
+
+  buf = &bufs.head->buf;
+  rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(buf) == rv);
+
+  nghttp2_bufs_reset(&bufs);
+
+  /* Push stream 2 associated to stream 5 */
+  rv = nghttp2_submit_push_promise(session, NGHTTP2_FLAG_NONE, 5, reqnv,
+                                   ARRLEN(reqnv), NULL);
+
+  CU_ASSERT(2 == rv);
+
+  rv = nghttp2_session_send(session);
+
+  CU_ASSERT(0 == rv);
+
+  stream = nghttp2_session_find_stream(session, 2);
+
+  CU_ASSERT(NGHTTP2_STREAM_STATE_RESERVED_LOCAL ==
+            nghttp2_stream_get_state(stream));
+
+  /* Send response to push stream 2 with END_STREAM set */
+  nghttp2_submit_response(session, 2, resnv, ARRLEN(resnv), NULL);
+
+  rv = nghttp2_session_send(session);
+
+  CU_ASSERT(0 == rv);
+
+  stream = nghttp2_session_find_stream(session, 2);
+
+  /* At server, pushed stream object is not retained after closed */
+  CU_ASSERT(NULL == stream);
+
+  /* Push stream 4 associated to stream 5 */
+  rv = nghttp2_submit_push_promise(session, NGHTTP2_FLAG_NONE, 5, reqnv,
+                                   ARRLEN(reqnv), NULL);
+
+  CU_ASSERT(4 == rv);
+
+  rv = nghttp2_session_send(session);
+
+  CU_ASSERT(0 == rv);
+
+  stream = nghttp2_session_find_stream(session, 4);
+
+  CU_ASSERT(NGHTTP2_STREAM_STATE_RESERVED_LOCAL ==
+            nghttp2_stream_get_state(stream));
+
+  /* Send response to push stream 4 without closing */
+  data_prd.read_callback = defer_data_source_read_callback;
+
+  nghttp2_submit_response(session, 4, resnv, ARRLEN(resnv), &data_prd);
+
+  rv = nghttp2_session_send(session);
+
+  CU_ASSERT(0 == rv);
+
+  stream = nghttp2_session_find_stream(session, 4);
+
+  CU_ASSERT(NGHTTP2_STREAM_STATE_HALF_CLOSED_REMOTE ==
+            nghttp2_stream_get_state(stream));
+
+  /* Create idle stream by PRIORITY frame */
+  nghttp2_frame_priority_init(&frame.priority, 7, &pri_spec_default);
+
+  rv = nghttp2_frame_pack_priority(&bufs, &frame.priority);
+
+  CU_ASSERT(0 == rv);
+
+  nghttp2_frame_priority_free(&frame.priority);
+
+  buf = &bufs.head->buf;
+  rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(buf) == rv);
+
+  stream = nghttp2_session_find_stream(session, 7);
+
+  CU_ASSERT(NGHTTP2_STREAM_STATE_IDLE == nghttp2_stream_get_state(stream));
+
+  nghttp2_bufs_reset(&bufs);
+
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_session_del(session);
+
+  /* Test for client side */
+
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  nghttp2_submit_request(session, NULL, reqnv, ARRLEN(reqnv), NULL, NULL);
+
+  rv = nghttp2_session_send(session);
+
+  CU_ASSERT(0 == rv);
+
+  /* Receive PUSH_PROMISE 2 associated to stream 1 */
+  pack_push_promise(&bufs, &deflater, 1, NGHTTP2_FLAG_END_HEADERS, 2, reqnv,
+                    ARRLEN(reqnv), mem);
+
+  buf = &bufs.head->buf;
+  rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(buf) == rv);
+
+  stream = nghttp2_session_find_stream(session, 2);
+
+  CU_ASSERT(NGHTTP2_STREAM_STATE_RESERVED_REMOTE ==
+            nghttp2_stream_get_state(stream));
+
+  nghttp2_bufs_reset(&bufs);
+
+  /* Receive push response for stream 2 without END_STREAM set */
+  pack_headers(&bufs, &deflater, 2, NGHTTP2_FLAG_END_HEADERS, resnv,
+               ARRLEN(resnv), mem);
+
+  buf = &bufs.head->buf;
+  rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(buf) == rv);
+
+  stream = nghttp2_session_find_stream(session, 2);
+
+  CU_ASSERT(NGHTTP2_STREAM_STATE_HALF_CLOSED_LOCAL ==
+            nghttp2_stream_get_state(stream));
+
+  nghttp2_bufs_reset(&bufs);
+
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_session_del(session);
+
+  nghttp2_bufs_free(&bufs);
+}
+
+void test_nghttp2_session_stream_get_something(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_stream *a, *b, *c;
+
+  memset(&callbacks, 0, sizeof(callbacks));
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  a = open_stream(session, 1);
+
+  CU_ASSERT(nghttp2_session_get_root_stream(session) ==
+            nghttp2_stream_get_parent(a));
+  CU_ASSERT(NULL == nghttp2_stream_get_previous_sibling(a));
+  CU_ASSERT(NULL == nghttp2_stream_get_next_sibling(a));
+  CU_ASSERT(NULL == nghttp2_stream_get_first_child(a));
+
+  b = open_stream_with_dep(session, 3, a);
+  c = open_stream_with_dep_weight(session, 5, 11, a);
+
+  CU_ASSERT(a == nghttp2_stream_get_parent(c));
+  CU_ASSERT(a == nghttp2_stream_get_parent(b));
+
+  CU_ASSERT(c == nghttp2_stream_get_first_child(a));
+
+  CU_ASSERT(b == nghttp2_stream_get_next_sibling(c));
+  CU_ASSERT(c == nghttp2_stream_get_previous_sibling(b));
+
+  CU_ASSERT(27 == nghttp2_stream_get_sum_dependency_weight(a));
+
+  CU_ASSERT(11 == nghttp2_stream_get_weight(c));
+  CU_ASSERT(5 == nghttp2_stream_get_stream_id(c));
+  CU_ASSERT(0 == nghttp2_stream_get_stream_id(&session->root));
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_find_stream(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_stream *stream;
+
+  memset(&callbacks, 0, sizeof(callbacks));
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  open_recv_stream(session, 1);
+
+  stream = nghttp2_session_find_stream(session, 1);
+
+  CU_ASSERT(NULL != stream);
+  CU_ASSERT(1 == stream->stream_id);
+
+  stream = nghttp2_session_find_stream(session, 0);
+
+  CU_ASSERT(&session->root == stream);
+  CU_ASSERT(0 == stream->stream_id);
+
+  stream = nghttp2_session_find_stream(session, 2);
+
+  CU_ASSERT(NULL == stream);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_keep_closed_stream(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  const size_t max_concurrent_streams = 5;
+  nghttp2_settings_entry iv = {NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS,
+                               (uint32_t)max_concurrent_streams};
+  size_t i;
+
+  memset(&callbacks, 0, sizeof(callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  nghttp2_submit_settings(session, NGHTTP2_FLAG_NONE, &iv, 1);
+
+  for (i = 0; i < max_concurrent_streams; ++i) {
+    open_recv_stream(session, (int32_t)i * 2 + 1);
+  }
+
+  CU_ASSERT(0 == session->num_closed_streams);
+
+  nghttp2_session_close_stream(session, 1, NGHTTP2_NO_ERROR);
+
+  CU_ASSERT(1 == session->num_closed_streams);
+  CU_ASSERT(1 == session->closed_stream_tail->stream_id);
+  CU_ASSERT(session->closed_stream_tail == session->closed_stream_head);
+
+  nghttp2_session_close_stream(session, 5, NGHTTP2_NO_ERROR);
+
+  CU_ASSERT(2 == session->num_closed_streams);
+  CU_ASSERT(5 == session->closed_stream_tail->stream_id);
+  CU_ASSERT(1 == session->closed_stream_head->stream_id);
+  CU_ASSERT(session->closed_stream_head ==
+            session->closed_stream_tail->closed_prev);
+  CU_ASSERT(NULL == session->closed_stream_tail->closed_next);
+  CU_ASSERT(session->closed_stream_tail ==
+            session->closed_stream_head->closed_next);
+  CU_ASSERT(NULL == session->closed_stream_head->closed_prev);
+
+  open_recv_stream(session, 11);
+  nghttp2_session_adjust_closed_stream(session);
+
+  CU_ASSERT(1 == session->num_closed_streams);
+  CU_ASSERT(5 == session->closed_stream_tail->stream_id);
+  CU_ASSERT(session->closed_stream_tail == session->closed_stream_head);
+  CU_ASSERT(NULL == session->closed_stream_head->closed_prev);
+  CU_ASSERT(NULL == session->closed_stream_head->closed_next);
+
+  open_recv_stream(session, 13);
+  nghttp2_session_adjust_closed_stream(session);
+
+  CU_ASSERT(0 == session->num_closed_streams);
+  CU_ASSERT(NULL == session->closed_stream_tail);
+  CU_ASSERT(NULL == session->closed_stream_head);
+
+  nghttp2_session_close_stream(session, 3, NGHTTP2_NO_ERROR);
+
+  CU_ASSERT(1 == session->num_closed_streams);
+  CU_ASSERT(3 == session->closed_stream_head->stream_id);
+
+  /* server initiated stream is not counted to max concurrent limit */
+  open_sent_stream(session, 2);
+  nghttp2_session_adjust_closed_stream(session);
+
+  CU_ASSERT(1 == session->num_closed_streams);
+  CU_ASSERT(3 == session->closed_stream_head->stream_id);
+
+  nghttp2_session_close_stream(session, 2, NGHTTP2_NO_ERROR);
+
+  CU_ASSERT(1 == session->num_closed_streams);
+  CU_ASSERT(3 == session->closed_stream_head->stream_id);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_keep_idle_stream(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  const size_t max_concurrent_streams = 1;
+  nghttp2_settings_entry iv = {NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS,
+                               (uint32_t)max_concurrent_streams};
+  int i;
+  int32_t stream_id;
+
+  memset(&callbacks, 0, sizeof(callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  nghttp2_submit_settings(session, NGHTTP2_FLAG_NONE, &iv, 1);
+
+  /* We at least allow NGHTTP2_MIN_IDLE_STREAM idle streams even if
+     max concurrent streams is very low. */
+  for (i = 0; i < NGHTTP2_MIN_IDLE_STREAMS; ++i) {
+    open_recv_stream2(session, i * 2 + 1, NGHTTP2_STREAM_IDLE);
+    nghttp2_session_adjust_idle_stream(session);
+  }
+
+  CU_ASSERT(NGHTTP2_MIN_IDLE_STREAMS == session->num_idle_streams);
+
+  stream_id = (NGHTTP2_MIN_IDLE_STREAMS - 1) * 2 + 1;
+  CU_ASSERT(1 == session->idle_stream_head->stream_id);
+  CU_ASSERT(stream_id == session->idle_stream_tail->stream_id);
+
+  stream_id += 2;
+
+  open_recv_stream2(session, stream_id, NGHTTP2_STREAM_IDLE);
+  nghttp2_session_adjust_idle_stream(session);
+
+  CU_ASSERT(NGHTTP2_MIN_IDLE_STREAMS == session->num_idle_streams);
+  CU_ASSERT(3 == session->idle_stream_head->stream_id);
+  CU_ASSERT(stream_id == session->idle_stream_tail->stream_id);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_detach_idle_stream(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  int i;
+  nghttp2_stream *stream;
+
+  memset(&callbacks, 0, sizeof(callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  for (i = 1; i <= 3; ++i) {
+    nghttp2_session_open_stream(session, i, NGHTTP2_STREAM_FLAG_NONE,
+                                &pri_spec_default, NGHTTP2_STREAM_IDLE, NULL);
+  }
+
+  CU_ASSERT(3 == session->num_idle_streams);
+
+  /* Detach middle stream */
+  stream = nghttp2_session_get_stream_raw(session, 2);
+
+  CU_ASSERT(session->idle_stream_head == stream->closed_prev);
+  CU_ASSERT(session->idle_stream_tail == stream->closed_next);
+  CU_ASSERT(stream == session->idle_stream_head->closed_next);
+  CU_ASSERT(stream == session->idle_stream_tail->closed_prev);
+
+  nghttp2_session_detach_idle_stream(session, stream);
+
+  CU_ASSERT(2 == session->num_idle_streams);
+
+  CU_ASSERT(NULL == stream->closed_prev);
+  CU_ASSERT(NULL == stream->closed_next);
+
+  CU_ASSERT(session->idle_stream_head ==
+            session->idle_stream_tail->closed_prev);
+  CU_ASSERT(session->idle_stream_tail ==
+            session->idle_stream_head->closed_next);
+
+  /* Detach head stream */
+  stream = session->idle_stream_head;
+
+  nghttp2_session_detach_idle_stream(session, stream);
+
+  CU_ASSERT(1 == session->num_idle_streams);
+
+  CU_ASSERT(session->idle_stream_head == session->idle_stream_tail);
+  CU_ASSERT(NULL == session->idle_stream_head->closed_prev);
+  CU_ASSERT(NULL == session->idle_stream_head->closed_next);
+
+  /* Detach last stream */
+
+  stream = session->idle_stream_head;
+
+  nghttp2_session_detach_idle_stream(session, stream);
+
+  CU_ASSERT(0 == session->num_idle_streams);
+
+  CU_ASSERT(NULL == session->idle_stream_head);
+  CU_ASSERT(NULL == session->idle_stream_tail);
+
+  for (i = 4; i <= 5; ++i) {
+    nghttp2_session_open_stream(session, i, NGHTTP2_STREAM_FLAG_NONE,
+                                &pri_spec_default, NGHTTP2_STREAM_IDLE, NULL);
+  }
+
+  CU_ASSERT(2 == session->num_idle_streams);
+
+  /* Detach tail stream */
+
+  stream = session->idle_stream_tail;
+
+  nghttp2_session_detach_idle_stream(session, stream);
+
+  CU_ASSERT(1 == session->num_idle_streams);
+
+  CU_ASSERT(session->idle_stream_head == session->idle_stream_tail);
+  CU_ASSERT(NULL == session->idle_stream_head->closed_prev);
+  CU_ASSERT(NULL == session->idle_stream_head->closed_next);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_large_dep_tree(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  size_t i;
+  nghttp2_stream *dep_stream = NULL;
+  nghttp2_stream *stream;
+  int32_t stream_id;
+
+  memset(&callbacks, 0, sizeof(callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  stream_id = 1;
+  for (i = 0; i < 250; ++i, stream_id += 2) {
+    dep_stream = open_stream_with_dep(session, stream_id, dep_stream);
+  }
+
+  stream_id = 1;
+  for (i = 0; i < 250; ++i, stream_id += 2) {
+    stream = nghttp2_session_get_stream(session, stream_id);
+    CU_ASSERT(nghttp2_stream_dep_find_ancestor(stream, &session->root));
+    CU_ASSERT(nghttp2_stream_in_dep_tree(stream));
+  }
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_graceful_shutdown(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data ud;
+
+  memset(&callbacks, 0, sizeof(callbacks));
+  callbacks.send_callback = null_send_callback;
+  callbacks.on_frame_send_callback = on_frame_send_callback;
+  callbacks.on_stream_close_callback = on_stream_close_callback;
+
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+
+  open_recv_stream(session, 301);
+  open_sent_stream(session, 302);
+  open_recv_stream(session, 309);
+  open_recv_stream(session, 311);
+  open_recv_stream(session, 319);
+
+  CU_ASSERT(0 == nghttp2_submit_shutdown_notice(session));
+
+  ud.frame_send_cb_called = 0;
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  CU_ASSERT(1 == ud.frame_send_cb_called);
+  CU_ASSERT((1u << 31) - 1 == session->local_last_stream_id);
+
+  CU_ASSERT(0 == nghttp2_submit_goaway(session, NGHTTP2_FLAG_NONE, 311,
+                                       NGHTTP2_NO_ERROR, NULL, 0));
+
+  ud.frame_send_cb_called = 0;
+  ud.stream_close_cb_called = 0;
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  CU_ASSERT(1 == ud.frame_send_cb_called);
+  CU_ASSERT(311 == session->local_last_stream_id);
+  CU_ASSERT(1 == ud.stream_close_cb_called);
+
+  CU_ASSERT(0 ==
+            nghttp2_session_terminate_session2(session, 301, NGHTTP2_NO_ERROR));
+
+  ud.frame_send_cb_called = 0;
+  ud.stream_close_cb_called = 0;
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  CU_ASSERT(1 == ud.frame_send_cb_called);
+  CU_ASSERT(301 == session->local_last_stream_id);
+  CU_ASSERT(2 == ud.stream_close_cb_called);
+
+  CU_ASSERT(NULL != nghttp2_session_get_stream(session, 301));
+  CU_ASSERT(NULL != nghttp2_session_get_stream(session, 302));
+  CU_ASSERT(NULL == nghttp2_session_get_stream(session, 309));
+  CU_ASSERT(NULL == nghttp2_session_get_stream(session, 311));
+  CU_ASSERT(NULL == nghttp2_session_get_stream(session, 319));
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_on_header_temporal_failure(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data ud;
+  nghttp2_bufs bufs;
+  nghttp2_buf *buf;
+  nghttp2_hd_deflater deflater;
+  nghttp2_nv nv[] = {MAKE_NV("alpha", "bravo"), MAKE_NV("charlie", "delta")};
+  nghttp2_nv *nva;
+  size_t hdpos;
+  ssize_t rv;
+  nghttp2_frame frame;
+  nghttp2_frame_hd hd;
+  nghttp2_outbound_item *item;
+  nghttp2_mem *mem;
+
+  mem = nghttp2_mem_default();
+  memset(&callbacks, 0, sizeof(callbacks));
+  callbacks.on_header_callback = temporal_failure_on_header_callback;
+
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+
+  frame_pack_bufs_init(&bufs);
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  nghttp2_nv_array_copy(&nva, reqnv, ARRLEN(reqnv), mem);
+
+  nghttp2_frame_headers_init(&frame.headers, NGHTTP2_FLAG_END_STREAM, 1,
+                             NGHTTP2_HCAT_REQUEST, NULL, nva, ARRLEN(reqnv));
+  nghttp2_frame_pack_headers(&bufs, &frame.headers, &deflater);
+  nghttp2_frame_headers_free(&frame.headers, mem);
+
+  /* We are going to create CONTINUATION.  First serialize header
+     block, and then frame header. */
+  hdpos = nghttp2_bufs_len(&bufs);
+
+  buf = &bufs.head->buf;
+  buf->last += NGHTTP2_FRAME_HDLEN;
+
+  nghttp2_hd_deflate_hd_bufs(&deflater, &bufs, &nv[1], 1);
+
+  nghttp2_frame_hd_init(&hd,
+                        nghttp2_bufs_len(&bufs) - hdpos - NGHTTP2_FRAME_HDLEN,
+                        NGHTTP2_CONTINUATION, NGHTTP2_FLAG_END_HEADERS, 1);
+
+  nghttp2_frame_pack_frame_hd(&buf->pos[hdpos], &hd);
+
+  ud.header_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_bufs_len(&bufs));
+
+  CU_ASSERT((ssize_t)nghttp2_bufs_len(&bufs) == rv);
+  CU_ASSERT(1 == ud.header_cb_called);
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(NGHTTP2_RST_STREAM == item->frame.hd.type);
+  CU_ASSERT(1 == item->frame.hd.stream_id);
+
+  /* Make sure no header decompression error occurred */
+  CU_ASSERT(NGHTTP2_GOAWAY_NONE == session->goaway_flags);
+
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_session_del(session);
+
+  nghttp2_bufs_reset(&bufs);
+
+  /* Check for PUSH_PROMISE */
+  nghttp2_hd_deflate_init(&deflater, mem);
+  nghttp2_session_client_new(&session, &callbacks, &ud);
+
+  open_sent_stream(session, 1);
+
+  rv = pack_push_promise(&bufs, &deflater, 1, NGHTTP2_FLAG_END_HEADERS, 2,
+                         reqnv, ARRLEN(reqnv), mem);
+  CU_ASSERT(0 == rv);
+
+  ud.header_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_bufs_len(&bufs));
+  CU_ASSERT((ssize_t)nghttp2_bufs_len(&bufs) == rv);
+  CU_ASSERT(1 == ud.header_cb_called);
+
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_RST_STREAM == item->frame.hd.type);
+  CU_ASSERT(2 == item->frame.hd.stream_id);
+  CU_ASSERT(NGHTTP2_INTERNAL_ERROR == item->frame.rst_stream.error_code);
+
+  nghttp2_session_del(session);
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_bufs_free(&bufs);
+}
+
+void test_nghttp2_session_recv_client_magic(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  ssize_t rv;
+  nghttp2_frame ping_frame;
+  uint8_t buf[16];
+
+  /* enable global nghttp2_enable_strict_preface here */
+  nghttp2_enable_strict_preface = 1;
+
+  memset(&callbacks, 0, sizeof(callbacks));
+
+  /* Check success case */
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  rv = nghttp2_session_mem_recv(session, (const uint8_t *)NGHTTP2_CLIENT_MAGIC,
+                                NGHTTP2_CLIENT_MAGIC_LEN);
+
+  CU_ASSERT(rv == NGHTTP2_CLIENT_MAGIC_LEN);
+  CU_ASSERT(NGHTTP2_IB_READ_FIRST_SETTINGS == session->iframe.state);
+
+  /* Receiving PING is error because we want SETTINGS. */
+  nghttp2_frame_ping_init(&ping_frame.ping, NGHTTP2_FLAG_NONE, NULL);
+
+  nghttp2_frame_pack_frame_hd(buf, &ping_frame.ping.hd);
+
+  rv = nghttp2_session_mem_recv(session, buf, NGHTTP2_FRAME_HDLEN);
+  CU_ASSERT(NGHTTP2_FRAME_HDLEN == rv);
+  CU_ASSERT(NGHTTP2_IB_IGN_ALL == session->iframe.state);
+  CU_ASSERT(0 == session->iframe.payloadleft);
+
+  nghttp2_frame_ping_free(&ping_frame.ping);
+
+  nghttp2_session_del(session);
+
+  /* Check bad case */
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  /* Feed magic with one byte less */
+  rv = nghttp2_session_mem_recv(session, (const uint8_t *)NGHTTP2_CLIENT_MAGIC,
+                                NGHTTP2_CLIENT_MAGIC_LEN - 1);
+
+  CU_ASSERT(rv == NGHTTP2_CLIENT_MAGIC_LEN - 1);
+  CU_ASSERT(NGHTTP2_IB_READ_CLIENT_MAGIC == session->iframe.state);
+  CU_ASSERT(1 == session->iframe.payloadleft);
+
+  rv = nghttp2_session_mem_recv(session, (const uint8_t *)"\0", 1);
+
+  CU_ASSERT(NGHTTP2_ERR_BAD_CLIENT_MAGIC == rv);
+
+  nghttp2_session_del(session);
+
+  /* disable global nghttp2_enable_strict_preface here */
+  nghttp2_enable_strict_preface = 0;
+}
+
+void test_nghttp2_session_delete_data_item(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_stream *a;
+  nghttp2_data_provider prd;
+
+  memset(&callbacks, 0, sizeof(callbacks));
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  a = open_recv_stream(session, 1);
+  open_recv_stream_with_dep(session, 3, a);
+
+  /* We don't care about these members, since we won't send data */
+  prd.source.ptr = NULL;
+  prd.read_callback = fail_data_source_read_callback;
+
+  CU_ASSERT(0 == nghttp2_submit_data(session, NGHTTP2_FLAG_NONE, 1, &prd));
+  CU_ASSERT(0 == nghttp2_submit_data(session, NGHTTP2_FLAG_NONE, 3, &prd));
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_open_idle_stream(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_stream *stream;
+  nghttp2_stream *opened_stream;
+  nghttp2_priority_spec pri_spec;
+  nghttp2_frame frame;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  nghttp2_priority_spec_init(&pri_spec, 0, 3, 0);
+
+  nghttp2_frame_priority_init(&frame.priority, 1, &pri_spec);
+
+  CU_ASSERT(0 == nghttp2_session_on_priority_received(session, &frame));
+
+  stream = nghttp2_session_get_stream_raw(session, 1);
+
+  CU_ASSERT(NGHTTP2_STREAM_IDLE == stream->state);
+  CU_ASSERT(NULL == stream->closed_prev);
+  CU_ASSERT(NULL == stream->closed_next);
+  CU_ASSERT(1 == session->num_idle_streams);
+  CU_ASSERT(session->idle_stream_head == stream);
+  CU_ASSERT(session->idle_stream_tail == stream);
+
+  opened_stream = open_recv_stream2(session, 1, NGHTTP2_STREAM_OPENING);
+
+  CU_ASSERT(stream == opened_stream);
+  CU_ASSERT(NGHTTP2_STREAM_OPENING == stream->state);
+  CU_ASSERT(0 == session->num_idle_streams);
+  CU_ASSERT(NULL == session->idle_stream_head);
+  CU_ASSERT(NULL == session->idle_stream_tail);
+
+  nghttp2_frame_priority_free(&frame.priority);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_cancel_reserved_remote(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_stream *stream;
+  nghttp2_frame frame;
+  nghttp2_nv *nva;
+  size_t nvlen;
+  nghttp2_hd_deflater deflater;
+  nghttp2_mem *mem;
+  nghttp2_bufs bufs;
+  ssize_t rv;
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  stream = open_recv_stream2(session, 2, NGHTTP2_STREAM_RESERVED);
+
+  nghttp2_submit_rst_stream(session, NGHTTP2_FLAG_NONE, 2, NGHTTP2_CANCEL);
+
+  CU_ASSERT(NGHTTP2_STREAM_CLOSING == stream->state);
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  nvlen = ARRLEN(resnv);
+  nghttp2_nv_array_copy(&nva, resnv, nvlen, mem);
+
+  nghttp2_frame_headers_init(&frame.headers, NGHTTP2_FLAG_END_HEADERS, 2,
+                             NGHTTP2_HCAT_PUSH_RESPONSE, NULL, nva, nvlen);
+  rv = nghttp2_frame_pack_headers(&bufs, &frame.headers, &deflater);
+
+  CU_ASSERT(0 == rv);
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+
+  /* stream is not dangling, so assign NULL */
+  stream = NULL;
+
+  /* No RST_STREAM or GOAWAY is generated since stream should be in
+     NGHTTP2_STREAM_CLOSING and push response should be ignored. */
+  CU_ASSERT(0 == nghttp2_outbound_queue_size(&session->ob_reg));
+
+  /* Check that we can receive push response HEADERS while RST_STREAM
+     is just queued. */
+  open_recv_stream2(session, 4, NGHTTP2_STREAM_RESERVED);
+
+  nghttp2_submit_rst_stream(session, NGHTTP2_FLAG_NONE, 2, NGHTTP2_CANCEL);
+
+  nghttp2_bufs_reset(&bufs);
+
+  frame.hd.stream_id = 4;
+  rv = nghttp2_frame_pack_headers(&bufs, &frame.headers, &deflater);
+
+  CU_ASSERT(0 == rv);
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+
+  CU_ASSERT(1 == nghttp2_outbound_queue_size(&session->ob_reg));
+
+  nghttp2_frame_headers_free(&frame.headers, mem);
+
+  nghttp2_hd_deflate_free(&deflater);
+
+  nghttp2_session_del(session);
+
+  nghttp2_bufs_free(&bufs);
+}
+
+void test_nghttp2_session_reset_pending_headers(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_stream *stream;
+  int32_t stream_id;
+  my_user_data ud;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+  callbacks.on_frame_send_callback = on_frame_send_callback;
+  callbacks.on_frame_not_send_callback = on_frame_not_send_callback;
+  callbacks.on_stream_close_callback = on_stream_close_callback;
+
+  nghttp2_session_client_new(&session, &callbacks, &ud);
+
+  stream_id = nghttp2_submit_request(session, NULL, NULL, 0, NULL, NULL);
+  CU_ASSERT(stream_id >= 1);
+
+  nghttp2_submit_rst_stream(session, NGHTTP2_FLAG_NONE, stream_id,
+                            NGHTTP2_CANCEL);
+
+  session->remote_settings.max_concurrent_streams = 0;
+
+  /* RST_STREAM cancels pending HEADERS and is not actually sent. */
+  ud.frame_send_cb_called = 0;
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  CU_ASSERT(0 == ud.frame_send_cb_called);
+
+  stream = nghttp2_session_get_stream(session, stream_id);
+
+  CU_ASSERT(NULL == stream);
+
+  /* See HEADERS is not sent.  on_stream_close is called just like
+     transmission failure. */
+  session->remote_settings.max_concurrent_streams = 1;
+
+  ud.frame_not_send_cb_called = 0;
+  ud.stream_close_error_code = 0;
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  CU_ASSERT(1 == ud.frame_not_send_cb_called);
+  CU_ASSERT(NGHTTP2_HEADERS == ud.not_sent_frame_type);
+  CU_ASSERT(NGHTTP2_CANCEL == ud.stream_close_error_code);
+
+  stream = nghttp2_session_get_stream(session, stream_id);
+
+  CU_ASSERT(NULL == stream);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_send_data_callback(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_data_provider data_prd;
+  my_user_data ud;
+  accumulator acc;
+  nghttp2_frame_hd hd;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = accumulator_send_callback;
+  callbacks.send_data_callback = send_data_callback;
+
+  data_prd.read_callback = no_copy_data_source_read_callback;
+
+  acc.length = 0;
+  ud.acc = &acc;
+
+  ud.data_source_length = NGHTTP2_DATA_PAYLOADLEN * 2;
+
+  nghttp2_session_client_new(&session, &callbacks, &ud);
+
+  open_sent_stream(session, 1);
+
+  nghttp2_submit_data(session, NGHTTP2_FLAG_END_STREAM, 1, &data_prd);
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  CU_ASSERT((NGHTTP2_FRAME_HDLEN + NGHTTP2_DATA_PAYLOADLEN) * 2 == acc.length);
+
+  nghttp2_frame_unpack_frame_hd(&hd, acc.buf);
+
+  CU_ASSERT(16384 == hd.length);
+  CU_ASSERT(NGHTTP2_DATA == hd.type);
+  CU_ASSERT(NGHTTP2_FLAG_NONE == hd.flags);
+
+  nghttp2_frame_unpack_frame_hd(&hd, acc.buf + NGHTTP2_FRAME_HDLEN + hd.length);
+
+  CU_ASSERT(16384 == hd.length);
+  CU_ASSERT(NGHTTP2_DATA == hd.type);
+  CU_ASSERT(NGHTTP2_FLAG_END_STREAM == hd.flags);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_on_begin_headers_temporal_failure(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data ud;
+  nghttp2_bufs bufs;
+  nghttp2_mem *mem;
+  ssize_t rv;
+  nghttp2_hd_deflater deflater;
+  nghttp2_outbound_item *item;
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.on_begin_headers_callback =
+      temporal_failure_on_begin_headers_callback;
+  callbacks.on_header_callback = on_header_callback;
+  callbacks.on_frame_recv_callback = on_frame_recv_callback;
+  callbacks.send_callback = null_send_callback;
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+
+  rv = pack_headers(&bufs, &deflater, 1, NGHTTP2_FLAG_END_HEADERS, reqnv,
+                    ARRLEN(reqnv), mem);
+  CU_ASSERT(0 == rv);
+
+  ud.header_cb_called = 0;
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_bufs_len(&bufs));
+  CU_ASSERT((ssize_t)nghttp2_bufs_len(&bufs) == rv);
+  CU_ASSERT(0 == ud.header_cb_called);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_RST_STREAM == item->frame.hd.type);
+  CU_ASSERT(1 == item->frame.hd.stream_id);
+  CU_ASSERT(NGHTTP2_INTERNAL_ERROR == item->frame.rst_stream.error_code);
+
+  nghttp2_session_del(session);
+  nghttp2_hd_deflate_free(&deflater);
+
+  nghttp2_bufs_reset(&bufs);
+  /* check for PUSH_PROMISE */
+  nghttp2_hd_deflate_init(&deflater, mem);
+  nghttp2_session_client_new(&session, &callbacks, &ud);
+
+  open_sent_stream(session, 1);
+
+  rv = pack_push_promise(&bufs, &deflater, 1, NGHTTP2_FLAG_END_HEADERS, 2,
+                         reqnv, ARRLEN(reqnv), mem);
+  CU_ASSERT(0 == rv);
+
+  ud.header_cb_called = 0;
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_bufs_len(&bufs));
+  CU_ASSERT((ssize_t)nghttp2_bufs_len(&bufs) == rv);
+  CU_ASSERT(0 == ud.header_cb_called);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_RST_STREAM == item->frame.hd.type);
+  CU_ASSERT(2 == item->frame.hd.stream_id);
+  CU_ASSERT(NGHTTP2_INTERNAL_ERROR == item->frame.rst_stream.error_code);
+
+  nghttp2_session_del(session);
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_bufs_free(&bufs);
+}
+
+void test_nghttp2_session_defer_then_close(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_data_provider prd;
+  int rv;
+  const uint8_t *datap;
+  ssize_t datalen;
+  nghttp2_frame frame;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+
+  prd.read_callback = defer_data_source_read_callback;
+
+  rv = nghttp2_submit_request(session, NULL, reqnv, ARRLEN(reqnv), &prd, NULL);
+  CU_ASSERT(rv > 0);
+
+  /* This sends HEADERS */
+  datalen = nghttp2_session_mem_send(session, &datap);
+
+  CU_ASSERT(datalen > 0);
+
+  /* This makes DATA item deferred */
+  datalen = nghttp2_session_mem_send(session, &datap);
+
+  CU_ASSERT(datalen == 0);
+
+  nghttp2_frame_rst_stream_init(&frame.rst_stream, 1, NGHTTP2_CANCEL);
+
+  /* Assertion failure; GH-264 */
+  rv = nghttp2_session_on_rst_stream_received(session, &frame);
+
+  CU_ASSERT(rv == 0);
+
+  nghttp2_session_del(session);
+}
+
+static int submit_response_on_stream_close(nghttp2_session *session,
+                                           int32_t stream_id,
+                                           uint32_t error_code,
+                                           void *user_data) {
+  nghttp2_data_provider data_prd;
+  (void)error_code;
+  (void)user_data;
+
+  data_prd.read_callback = temporal_failure_data_source_read_callback;
+
+  // Attempt to submit response or data to the stream being closed
+  switch (stream_id) {
+  case 1:
+    CU_ASSERT(0 == nghttp2_submit_response(session, stream_id, resnv,
+                                           ARRLEN(resnv), &data_prd));
+    break;
+  case 3:
+    CU_ASSERT(0 == nghttp2_submit_data(session, NGHTTP2_FLAG_NONE, stream_id,
+                                       &data_prd));
+    break;
+  }
+
+  return 0;
+}
+
+void test_nghttp2_session_detach_item_from_closed_stream(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+
+  memset(&callbacks, 0, sizeof(callbacks));
+
+  callbacks.send_callback = null_send_callback;
+  callbacks.on_stream_close_callback = submit_response_on_stream_close;
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  open_recv_stream(session, 1);
+  open_recv_stream(session, 3);
+
+  nghttp2_session_close_stream(session, 1, NGHTTP2_NO_ERROR);
+  nghttp2_session_close_stream(session, 3, NGHTTP2_NO_ERROR);
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_flooding(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_bufs bufs;
+  nghttp2_buf *buf;
+  nghttp2_frame frame;
+  nghttp2_mem *mem;
+  size_t i;
+
+  mem = nghttp2_mem_default();
+
+  frame_pack_bufs_init(&bufs);
+
+  memset(&callbacks, 0, sizeof(callbacks));
+
+  /* PING ACK */
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  nghttp2_frame_ping_init(&frame.ping, NGHTTP2_FLAG_NONE, NULL);
+  nghttp2_frame_pack_ping(&bufs, &frame.ping);
+  nghttp2_frame_ping_free(&frame.ping);
+
+  buf = &bufs.head->buf;
+
+  for (i = 0; i < NGHTTP2_DEFAULT_MAX_OBQ_FLOOD_ITEM; ++i) {
+    CU_ASSERT(
+        (ssize_t)nghttp2_buf_len(buf) ==
+        nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf)));
+  }
+
+  CU_ASSERT(NGHTTP2_ERR_FLOODED ==
+            nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf)));
+
+  nghttp2_session_del(session);
+
+  /* SETTINGS ACK */
+  nghttp2_bufs_reset(&bufs);
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  nghttp2_frame_settings_init(&frame.settings, NGHTTP2_FLAG_NONE, NULL, 0);
+  nghttp2_frame_pack_settings(&bufs, &frame.settings);
+  nghttp2_frame_settings_free(&frame.settings, mem);
+
+  buf = &bufs.head->buf;
+
+  for (i = 0; i < NGHTTP2_DEFAULT_MAX_OBQ_FLOOD_ITEM; ++i) {
+    CU_ASSERT(
+        (ssize_t)nghttp2_buf_len(buf) ==
+        nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf)));
+  }
+
+  CU_ASSERT(NGHTTP2_ERR_FLOODED ==
+            nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf)));
+
+  nghttp2_session_del(session);
+  nghttp2_bufs_free(&bufs);
+}
+
+void test_nghttp2_session_change_stream_priority(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_stream *stream1, *stream2, *stream3, *stream5;
+  nghttp2_priority_spec pri_spec;
+  int rv;
+
+  memset(&callbacks, 0, sizeof(callbacks));
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  stream1 = open_recv_stream(session, 1);
+  stream3 = open_recv_stream_with_dep_weight(session, 3, 199, stream1);
+  stream2 = open_sent_stream_with_dep_weight(session, 2, 101, stream3);
+
+  nghttp2_priority_spec_init(&pri_spec, 1, 256, 0);
+
+  rv = nghttp2_session_change_stream_priority(session, 2, &pri_spec);
+
+  CU_ASSERT(0 == rv);
+
+  CU_ASSERT(stream1 == stream2->dep_prev);
+  CU_ASSERT(256 == stream2->weight);
+
+  /* Cannot change stream which does not exist */
+  rv = nghttp2_session_change_stream_priority(session, 5, &pri_spec);
+  CU_ASSERT(NGHTTP2_ERR_INVALID_ARGUMENT == rv);
+
+  /* It is an error to depend on itself */
+  rv = nghttp2_session_change_stream_priority(session, 1, &pri_spec);
+  CU_ASSERT(NGHTTP2_ERR_INVALID_ARGUMENT == rv);
+
+  /* It is an error to change priority of root stream (0) */
+  rv = nghttp2_session_change_stream_priority(session, 0, &pri_spec);
+  CU_ASSERT(NGHTTP2_ERR_INVALID_ARGUMENT == rv);
+
+  /* Depends on the non-existing idle stream.  This creates that idle
+     stream. */
+  nghttp2_priority_spec_init(&pri_spec, 5, 9, 1);
+
+  rv = nghttp2_session_change_stream_priority(session, 2, &pri_spec);
+
+  CU_ASSERT(0 == rv);
+
+  stream5 = nghttp2_session_get_stream_raw(session, 5);
+
+  CU_ASSERT(NULL != stream5);
+  CU_ASSERT(&session->root == stream5->dep_prev);
+  CU_ASSERT(stream5 == stream2->dep_prev);
+  CU_ASSERT(9 == stream2->weight);
+
+  nghttp2_session_del(session);
+
+  /* Check that this works in client session too */
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+
+  stream1 = open_sent_stream(session, 1);
+
+  nghttp2_priority_spec_init(&pri_spec, 5, 9, 1);
+
+  rv = nghttp2_session_change_stream_priority(session, 1, &pri_spec);
+
+  CU_ASSERT(0 == rv);
+
+  stream5 = nghttp2_session_get_stream_raw(session, 5);
+
+  CU_ASSERT(NULL != stream5);
+  CU_ASSERT(&session->root == stream5->dep_prev);
+  CU_ASSERT(stream5 == stream1->dep_prev);
+  CU_ASSERT(9 == stream1->weight);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_change_extpri_stream_priority(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_bufs bufs;
+  nghttp2_buf *buf;
+  ssize_t rv;
+  nghttp2_option *option;
+  nghttp2_extension frame;
+  nghttp2_ext_priority_update priority_update;
+  nghttp2_extpri extpri;
+  nghttp2_stream *stream;
+  static const uint8_t field_value[] = "u=2";
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+
+  frame_pack_bufs_init(&bufs);
+
+  nghttp2_option_new(&option);
+  nghttp2_option_set_builtin_recv_extension_type(option,
+                                                 NGHTTP2_PRIORITY_UPDATE);
+
+  nghttp2_session_server_new2(&session, &callbacks, NULL, option);
+
+  session->pending_no_rfc7540_priorities = 1;
+
+  open_recv_stream(session, 1);
+
+  extpri.urgency = NGHTTP2_EXTPRI_URGENCY_LOW + 1;
+  extpri.inc = 1;
+
+  rv = nghttp2_session_change_extpri_stream_priority(
+      session, 1, &extpri, /* ignore_client_signal = */ 0);
+
+  CU_ASSERT(0 == rv);
+
+  stream = nghttp2_session_get_stream(session, 1);
+
+  CU_ASSERT(NGHTTP2_EXTPRI_URGENCY_LOW ==
+            nghttp2_extpri_uint8_urgency(stream->extpri));
+  CU_ASSERT(1 == nghttp2_extpri_uint8_inc(stream->extpri));
+
+  /* Client can still update stream priority. */
+  frame.payload = &priority_update;
+  nghttp2_frame_priority_update_init(&frame, 1, (uint8_t *)field_value,
+                                     sizeof(field_value) - 1);
+  nghttp2_frame_pack_priority_update(&bufs, &frame);
+
+  buf = &bufs.head->buf;
+  rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(buf) == rv);
+  CU_ASSERT(2 == stream->extpri);
+
+  /* Start to ignore client priority signal for this stream. */
+  rv = nghttp2_session_change_extpri_stream_priority(
+      session, 1, &extpri, /* ignore_client_signal = */ 1);
+
+  CU_ASSERT(0 == rv);
+
+  stream = nghttp2_session_get_stream(session, 1);
+
+  CU_ASSERT(NGHTTP2_EXTPRI_URGENCY_LOW ==
+            nghttp2_extpri_uint8_urgency(stream->extpri));
+  CU_ASSERT(1 == nghttp2_extpri_uint8_inc(stream->extpri));
+
+  buf = &bufs.head->buf;
+  rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(buf) == rv);
+  CU_ASSERT(NGHTTP2_EXTPRI_URGENCY_LOW ==
+            nghttp2_extpri_uint8_urgency(stream->extpri));
+  CU_ASSERT(1 == nghttp2_extpri_uint8_inc(stream->extpri));
+
+  nghttp2_session_del(session);
+  nghttp2_option_del(option);
+  nghttp2_bufs_free(&bufs);
+}
+
+void test_nghttp2_session_create_idle_stream(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_stream *stream2, *stream4, *stream8, *stream10;
+  nghttp2_priority_spec pri_spec;
+  int rv;
+  int i;
+
+  memset(&callbacks, 0, sizeof(callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  stream2 = open_sent_stream(session, 2);
+
+  nghttp2_priority_spec_init(&pri_spec, 2, 111, 1);
+
+  rv = nghttp2_session_create_idle_stream(session, 4, &pri_spec);
+
+  CU_ASSERT(0 == rv);
+
+  stream4 = nghttp2_session_get_stream_raw(session, 4);
+
+  CU_ASSERT(4 == stream4->stream_id);
+  CU_ASSERT(111 == stream4->weight);
+  CU_ASSERT(stream2 == stream4->dep_prev);
+  CU_ASSERT(stream4 == stream2->dep_next);
+
+  /* If pri_spec->stream_id does not exist, and it is idle stream, it
+     is created too */
+  nghttp2_priority_spec_init(&pri_spec, 10, 109, 0);
+
+  rv = nghttp2_session_create_idle_stream(session, 8, &pri_spec);
+
+  CU_ASSERT(0 == rv);
+
+  stream8 = nghttp2_session_get_stream_raw(session, 8);
+  stream10 = nghttp2_session_get_stream_raw(session, 10);
+
+  CU_ASSERT(8 == stream8->stream_id);
+  CU_ASSERT(109 == stream8->weight);
+  CU_ASSERT(10 == stream10->stream_id);
+  CU_ASSERT(16 == stream10->weight);
+  CU_ASSERT(stream10 == stream8->dep_prev);
+  CU_ASSERT(&session->root == stream10->dep_prev);
+
+  /* It is an error to attempt to create already existing idle
+     stream */
+  rv = nghttp2_session_create_idle_stream(session, 4, &pri_spec);
+
+  CU_ASSERT(NGHTTP2_ERR_INVALID_ARGUMENT == rv);
+
+  /* It is an error to depend on itself */
+  pri_spec.stream_id = 6;
+
+  rv = nghttp2_session_create_idle_stream(session, 6, &pri_spec);
+  CU_ASSERT(NGHTTP2_ERR_INVALID_ARGUMENT == rv);
+
+  /* It is an error to create root stream (0) as idle stream */
+  rv = nghttp2_session_create_idle_stream(session, 0, &pri_spec);
+  CU_ASSERT(NGHTTP2_ERR_INVALID_ARGUMENT == rv);
+
+  /* It is an error to create non-idle stream */
+  session->last_sent_stream_id = 20;
+  pri_spec.stream_id = 2;
+
+  rv = nghttp2_session_create_idle_stream(session, 18, &pri_spec);
+
+  CU_ASSERT(NGHTTP2_ERR_INVALID_ARGUMENT == rv);
+
+  nghttp2_session_del(session);
+
+  /* Check that this works in client session too */
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+
+  nghttp2_priority_spec_init(&pri_spec, 4, 99, 1);
+
+  rv = nghttp2_session_create_idle_stream(session, 2, &pri_spec);
+
+  CU_ASSERT(0 == rv);
+
+  stream4 = nghttp2_session_get_stream_raw(session, 4);
+  stream2 = nghttp2_session_get_stream_raw(session, 2);
+
+  CU_ASSERT(NULL != stream4);
+  CU_ASSERT(NULL != stream2);
+  CU_ASSERT(&session->root == stream4->dep_prev);
+  CU_ASSERT(NGHTTP2_DEFAULT_WEIGHT == stream4->weight);
+  CU_ASSERT(stream4 == stream2->dep_prev);
+  CU_ASSERT(99 == stream2->weight);
+
+  nghttp2_session_del(session);
+
+  /* Check that idle stream is reduced when nghttp2_session_send() is
+     called. */
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  session->local_settings.max_concurrent_streams = 30;
+
+  nghttp2_priority_spec_init(&pri_spec, 0, 16, 0);
+  for (i = 0; i < 100; ++i) {
+    rv = nghttp2_session_create_idle_stream(session, i * 2 + 1, &pri_spec);
+
+    CU_ASSERT(0 == rv);
+
+    nghttp2_priority_spec_init(&pri_spec, i * 2 + 1, 16, 0);
+  }
+
+  CU_ASSERT(100 == session->num_idle_streams);
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(30 == session->num_idle_streams);
+  CU_ASSERT(141 == session->idle_stream_head->stream_id);
+
+  nghttp2_session_del(session);
+
+  /* Check that idle stream is reduced when nghttp2_session_mem_recv() is
+     called. */
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+
+  session->local_settings.max_concurrent_streams = 30;
+
+  nghttp2_priority_spec_init(&pri_spec, 0, 16, 0);
+  for (i = 0; i < 100; ++i) {
+    rv = nghttp2_session_create_idle_stream(session, i * 2 + 1, &pri_spec);
+
+    CU_ASSERT(0 == rv);
+
+    nghttp2_priority_spec_init(&pri_spec, i * 2 + 1, 16, 0);
+  }
+
+  CU_ASSERT(100 == session->num_idle_streams);
+  CU_ASSERT(0 == nghttp2_session_mem_recv(session, NULL, 0));
+  CU_ASSERT(30 == session->num_idle_streams);
+  CU_ASSERT(141 == session->idle_stream_head->stream_id);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_repeated_priority_change(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_frame frame;
+  nghttp2_priority_spec pri_spec;
+  int32_t stream_id, last_stream_id;
+  int32_t max_streams = 20;
+
+  memset(&callbacks, 0, sizeof(callbacks));
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  session->local_settings.max_concurrent_streams = (uint32_t)max_streams;
+
+  /* 1 -> 0 */
+  nghttp2_priority_spec_init(&pri_spec, 0, 16, 0);
+  nghttp2_frame_priority_init(&frame.priority, 1, &pri_spec);
+
+  CU_ASSERT(0 == nghttp2_session_on_priority_received(session, &frame));
+
+  nghttp2_frame_priority_free(&frame.priority);
+
+  last_stream_id = max_streams * 2 + 1;
+
+  for (stream_id = 3; stream_id < last_stream_id; stream_id += 2) {
+    /* 1 -> stream_id */
+    nghttp2_priority_spec_init(&pri_spec, stream_id, 16, 0);
+    nghttp2_frame_priority_init(&frame.priority, 1, &pri_spec);
+
+    CU_ASSERT(0 == nghttp2_session_on_priority_received(session, &frame));
+
+    nghttp2_frame_priority_free(&frame.priority);
+  }
+
+  CU_ASSERT(20 == session->num_idle_streams);
+  CU_ASSERT(1 == session->idle_stream_head->stream_id);
+
+  /* 1 -> last_stream_id */
+  nghttp2_priority_spec_init(&pri_spec, last_stream_id, 16, 0);
+  nghttp2_frame_priority_init(&frame.priority, 1, &pri_spec);
+
+  CU_ASSERT(0 == nghttp2_session_on_priority_received(session, &frame));
+
+  nghttp2_frame_priority_free(&frame.priority);
+
+  CU_ASSERT(20 == session->num_idle_streams);
+  CU_ASSERT(3 == session->idle_stream_head->stream_id);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_repeated_priority_submission(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_priority_spec pri_spec;
+  int32_t stream_id, last_stream_id;
+  uint32_t max_streams = NGHTTP2_MIN_IDLE_STREAMS;
+
+  memset(&callbacks, 0, sizeof(callbacks));
+
+  callbacks.send_callback = null_send_callback;
+
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+
+  session->local_settings.max_concurrent_streams = max_streams;
+
+  /* 1 -> 0 */
+  nghttp2_priority_spec_init(&pri_spec, 0, 16, 0);
+
+  CU_ASSERT(0 ==
+            nghttp2_submit_priority(session, NGHTTP2_FLAG_NONE, 1, &pri_spec));
+
+  last_stream_id = (int32_t)(max_streams * 2 + 1);
+
+  for (stream_id = 3; stream_id < last_stream_id; stream_id += 2) {
+    /* 1 -> stream_id */
+    nghttp2_priority_spec_init(&pri_spec, stream_id, 16, 0);
+
+    CU_ASSERT(
+        0 == nghttp2_submit_priority(session, NGHTTP2_FLAG_NONE, 1, &pri_spec));
+  }
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(max_streams == session->num_idle_streams);
+  CU_ASSERT(1 == session->idle_stream_head->stream_id);
+
+  /* 1 -> last_stream_id */
+  nghttp2_priority_spec_init(&pri_spec, last_stream_id, 16, 0);
+
+  CU_ASSERT(0 ==
+            nghttp2_submit_priority(session, NGHTTP2_FLAG_NONE, 1, &pri_spec));
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(max_streams == session->num_idle_streams);
+  CU_ASSERT(3 == session->idle_stream_head->stream_id);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_set_local_window_size(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_outbound_item *item;
+  nghttp2_stream *stream;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+  stream = open_sent_stream(session, 1);
+  stream->recv_window_size = 4096;
+
+  CU_ASSERT(0 == nghttp2_session_set_local_window_size(
+                     session, NGHTTP2_FLAG_NONE, 1, 65536));
+  CU_ASSERT(NGHTTP2_INITIAL_CONNECTION_WINDOW_SIZE + 1 ==
+            stream->local_window_size);
+  CU_ASSERT(4096 == stream->recv_window_size);
+  CU_ASSERT(65536 - 4096 ==
+            nghttp2_session_get_stream_local_window_size(session, 1));
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(NGHTTP2_WINDOW_UPDATE == item->frame.hd.type);
+  CU_ASSERT(1 == item->frame.window_update.hd.stream_id);
+  CU_ASSERT(1 == item->frame.window_update.window_size_increment);
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  /* Go decrement part */
+  CU_ASSERT(0 == nghttp2_session_set_local_window_size(
+                     session, NGHTTP2_FLAG_NONE, 1, 32768));
+  CU_ASSERT(32768 == stream->local_window_size);
+  CU_ASSERT(-28672 == stream->recv_window_size);
+  CU_ASSERT(32768 == stream->recv_reduction);
+  CU_ASSERT(65536 - 4096 ==
+            nghttp2_session_get_stream_local_window_size(session, 1));
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(item == NULL);
+
+  /* Increase local window size */
+  CU_ASSERT(0 == nghttp2_session_set_local_window_size(
+                     session, NGHTTP2_FLAG_NONE, 1, 49152));
+  CU_ASSERT(49152 == stream->local_window_size);
+  CU_ASSERT(-12288 == stream->recv_window_size);
+  CU_ASSERT(16384 == stream->recv_reduction);
+  CU_ASSERT(65536 - 4096 ==
+            nghttp2_session_get_stream_local_window_size(session, 1));
+  CU_ASSERT(NULL == nghttp2_session_get_next_ob_item(session));
+
+  /* Increase local window again */
+  CU_ASSERT(0 == nghttp2_session_set_local_window_size(
+                     session, NGHTTP2_FLAG_NONE, 1, 65537));
+  CU_ASSERT(65537 == stream->local_window_size);
+  CU_ASSERT(4096 == stream->recv_window_size);
+  CU_ASSERT(0 == stream->recv_reduction);
+  CU_ASSERT(65537 - 4096 ==
+            nghttp2_session_get_stream_local_window_size(session, 1));
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(1 == item->frame.window_update.window_size_increment);
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  /* Check connection-level flow control */
+  session->recv_window_size = 4096;
+  CU_ASSERT(0 == nghttp2_session_set_local_window_size(
+                     session, NGHTTP2_FLAG_NONE, 0, 65536));
+  CU_ASSERT(NGHTTP2_INITIAL_CONNECTION_WINDOW_SIZE + 1 ==
+            session->local_window_size);
+  CU_ASSERT(4096 == session->recv_window_size);
+  CU_ASSERT(65536 - 4096 == nghttp2_session_get_local_window_size(session));
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(NGHTTP2_WINDOW_UPDATE == item->frame.hd.type);
+  CU_ASSERT(0 == item->frame.window_update.hd.stream_id);
+  CU_ASSERT(1 == item->frame.window_update.window_size_increment);
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  /* Go decrement part */
+  CU_ASSERT(0 == nghttp2_session_set_local_window_size(
+                     session, NGHTTP2_FLAG_NONE, 0, 32768));
+  CU_ASSERT(32768 == session->local_window_size);
+  CU_ASSERT(-28672 == session->recv_window_size);
+  CU_ASSERT(32768 == session->recv_reduction);
+  CU_ASSERT(65536 - 4096 == nghttp2_session_get_local_window_size(session));
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(item == NULL);
+
+  /* Increase local window size */
+  CU_ASSERT(0 == nghttp2_session_set_local_window_size(
+                     session, NGHTTP2_FLAG_NONE, 0, 49152));
+  CU_ASSERT(49152 == session->local_window_size);
+  CU_ASSERT(-12288 == session->recv_window_size);
+  CU_ASSERT(16384 == session->recv_reduction);
+  CU_ASSERT(65536 - 4096 == nghttp2_session_get_local_window_size(session));
+  CU_ASSERT(NULL == nghttp2_session_get_next_ob_item(session));
+
+  /* Increase local window again */
+  CU_ASSERT(0 == nghttp2_session_set_local_window_size(
+                     session, NGHTTP2_FLAG_NONE, 0, 65537));
+  CU_ASSERT(65537 == session->local_window_size);
+  CU_ASSERT(4096 == session->recv_window_size);
+  CU_ASSERT(0 == session->recv_reduction);
+  CU_ASSERT(65537 - 4096 == nghttp2_session_get_local_window_size(session));
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(1 == item->frame.window_update.window_size_increment);
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  nghttp2_session_del(session);
+
+  /* Make sure that nghttp2_session_set_local_window_size submits
+     WINDOW_UPDATE if necessary to increase stream-level window. */
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+  stream = open_sent_stream(session, 1);
+  stream->recv_window_size = NGHTTP2_INITIAL_WINDOW_SIZE;
+
+  CU_ASSERT(0 == nghttp2_session_set_local_window_size(
+                     session, NGHTTP2_FLAG_NONE, 1, 0));
+  CU_ASSERT(0 == stream->recv_window_size);
+  CU_ASSERT(0 == nghttp2_session_get_stream_local_window_size(session, 1));
+  /* This should submit WINDOW_UPDATE frame because stream-level
+     receiving window is now full. */
+  CU_ASSERT(0 ==
+            nghttp2_session_set_local_window_size(session, NGHTTP2_FLAG_NONE, 1,
+                                                  NGHTTP2_INITIAL_WINDOW_SIZE));
+  CU_ASSERT(0 == stream->recv_window_size);
+  CU_ASSERT(NGHTTP2_INITIAL_WINDOW_SIZE ==
+            nghttp2_session_get_stream_local_window_size(session, 1));
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(NGHTTP2_WINDOW_UPDATE == item->frame.hd.type);
+  CU_ASSERT(1 == item->frame.hd.stream_id);
+  CU_ASSERT(NGHTTP2_INITIAL_WINDOW_SIZE ==
+            item->frame.window_update.window_size_increment);
+
+  nghttp2_session_del(session);
+
+  /* Make sure that nghttp2_session_set_local_window_size submits
+     WINDOW_UPDATE if necessary to increase connection-level
+     window. */
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+  session->recv_window_size = NGHTTP2_INITIAL_WINDOW_SIZE;
+
+  CU_ASSERT(0 == nghttp2_session_set_local_window_size(
+                     session, NGHTTP2_FLAG_NONE, 0, 0));
+  CU_ASSERT(0 == session->recv_window_size);
+  CU_ASSERT(0 == nghttp2_session_get_local_window_size(session));
+  /* This should submit WINDOW_UPDATE frame because connection-level
+     receiving window is now full. */
+  CU_ASSERT(0 ==
+            nghttp2_session_set_local_window_size(session, NGHTTP2_FLAG_NONE, 0,
+                                                  NGHTTP2_INITIAL_WINDOW_SIZE));
+  CU_ASSERT(0 == session->recv_window_size);
+  CU_ASSERT(NGHTTP2_INITIAL_WINDOW_SIZE ==
+            nghttp2_session_get_local_window_size(session));
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(NGHTTP2_WINDOW_UPDATE == item->frame.hd.type);
+  CU_ASSERT(0 == item->frame.hd.stream_id);
+  CU_ASSERT(NGHTTP2_INITIAL_WINDOW_SIZE ==
+            item->frame.window_update.window_size_increment);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_cancel_from_before_frame_send(void) {
+  int rv;
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data ud;
+  nghttp2_settings_entry iv;
+  nghttp2_data_provider data_prd;
+  int32_t stream_id;
+  nghttp2_stream *stream;
+
+  memset(&callbacks, 0, sizeof(callbacks));
+
+  callbacks.before_frame_send_callback = cancel_before_frame_send_callback;
+  callbacks.on_frame_not_send_callback = on_frame_not_send_callback;
+  callbacks.send_callback = null_send_callback;
+
+  nghttp2_session_client_new(&session, &callbacks, &ud);
+
+  iv.settings_id = 0;
+  iv.value = 1000000009;
+
+  rv = nghttp2_submit_settings(session, NGHTTP2_FLAG_NONE, &iv, 1);
+
+  CU_ASSERT(0 == rv);
+
+  ud.frame_send_cb_called = 0;
+  ud.before_frame_send_cb_called = 0;
+  ud.frame_not_send_cb_called = 0;
+
+  rv = nghttp2_session_send(session);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(0 == ud.frame_send_cb_called);
+  CU_ASSERT(1 == ud.before_frame_send_cb_called);
+  CU_ASSERT(1 == ud.frame_not_send_cb_called);
+
+  data_prd.source.ptr = NULL;
+  data_prd.read_callback = temporal_failure_data_source_read_callback;
+
+  stream_id = nghttp2_submit_request(session, NULL, reqnv, ARRLEN(reqnv),
+                                     &data_prd, NULL);
+
+  CU_ASSERT(stream_id > 0);
+
+  ud.frame_send_cb_called = 0;
+  ud.before_frame_send_cb_called = 0;
+  ud.frame_not_send_cb_called = 0;
+
+  rv = nghttp2_session_send(session);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(0 == ud.frame_send_cb_called);
+  CU_ASSERT(1 == ud.before_frame_send_cb_called);
+  CU_ASSERT(1 == ud.frame_not_send_cb_called);
+
+  stream = nghttp2_session_get_stream_raw(session, stream_id);
+
+  CU_ASSERT(NULL == stream);
+
+  nghttp2_session_del(session);
+
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+
+  open_recv_stream(session, 1);
+
+  stream_id = nghttp2_submit_push_promise(session, NGHTTP2_FLAG_NONE, 1, reqnv,
+                                          ARRLEN(reqnv), NULL);
+
+  CU_ASSERT(stream_id > 0);
+
+  ud.frame_send_cb_called = 0;
+  ud.before_frame_send_cb_called = 0;
+  ud.frame_not_send_cb_called = 0;
+
+  rv = nghttp2_session_send(session);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(0 == ud.frame_send_cb_called);
+  CU_ASSERT(1 == ud.before_frame_send_cb_called);
+  CU_ASSERT(1 == ud.frame_not_send_cb_called);
+
+  stream = nghttp2_session_get_stream_raw(session, stream_id);
+
+  CU_ASSERT(NULL == stream);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_too_many_settings(void) {
+  nghttp2_session *session;
+  nghttp2_option *option;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_frame frame;
+  nghttp2_bufs bufs;
+  nghttp2_buf *buf;
+  ssize_t rv;
+  my_user_data ud;
+  nghttp2_settings_entry iv[3];
+  nghttp2_mem *mem;
+  nghttp2_outbound_item *item;
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.on_frame_recv_callback = on_frame_recv_callback;
+  callbacks.send_callback = null_send_callback;
+
+  nghttp2_option_new(&option);
+  nghttp2_option_set_max_settings(option, 1);
+
+  nghttp2_session_client_new2(&session, &callbacks, &ud, option);
+
+  CU_ASSERT(1 == session->max_settings);
+
+  nghttp2_option_del(option);
+
+  iv[0].settings_id = NGHTTP2_SETTINGS_HEADER_TABLE_SIZE;
+  iv[0].value = 3000;
+
+  iv[1].settings_id = NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE;
+  iv[1].value = 16384;
+
+  nghttp2_frame_settings_init(&frame.settings, NGHTTP2_FLAG_NONE, dup_iv(iv, 2),
+                              2);
+
+  rv = nghttp2_frame_pack_settings(&bufs, &frame.settings);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(nghttp2_bufs_len(&bufs) > 0);
+
+  nghttp2_frame_settings_free(&frame.settings, mem);
+
+  buf = &bufs.head->buf;
+  assert(nghttp2_bufs_len(&bufs) == nghttp2_buf_len(buf));
+
+  ud.frame_recv_cb_called = 0;
+
+  rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf));
+  CU_ASSERT((ssize_t)nghttp2_buf_len(buf) == rv);
+
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_GOAWAY == item->frame.hd.type);
+
+  nghttp2_bufs_reset(&bufs);
+  nghttp2_bufs_free(&bufs);
+  nghttp2_session_del(session);
+}
+
+static void
+prepare_session_removed_closed_stream(nghttp2_session *session,
+                                      nghttp2_hd_deflater *deflater) {
+  int rv;
+  nghttp2_settings_entry iv;
+  nghttp2_bufs bufs;
+  nghttp2_mem *mem;
+  ssize_t nread;
+  int i;
+  nghttp2_stream *stream;
+  nghttp2_frame_hd hd;
+
+  mem = nghttp2_mem_default();
+
+  frame_pack_bufs_init(&bufs);
+
+  iv.settings_id = NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS;
+  iv.value = 2;
+
+  rv = nghttp2_submit_settings(session, NGHTTP2_FLAG_NONE, &iv, 1);
+
+  CU_ASSERT(0 == rv);
+
+  rv = nghttp2_session_send(session);
+
+  CU_ASSERT(0 == rv);
+
+  for (i = 1; i <= 3; i += 2) {
+    rv = pack_headers(&bufs, deflater, i,
+                      NGHTTP2_FLAG_END_HEADERS | NGHTTP2_FLAG_END_STREAM, reqnv,
+                      ARRLEN(reqnv), mem);
+
+    CU_ASSERT(0 == rv);
+
+    nread = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                     nghttp2_bufs_len(&bufs));
+
+    CU_ASSERT((ssize_t)nghttp2_bufs_len(&bufs) == nread);
+
+    nghttp2_bufs_reset(&bufs);
+  }
+
+  nghttp2_session_close_stream(session, 3, NGHTTP2_NO_ERROR);
+
+  rv = pack_headers(&bufs, deflater, 5,
+                    NGHTTP2_FLAG_END_HEADERS | NGHTTP2_FLAG_END_STREAM, reqnv,
+                    ARRLEN(reqnv), mem);
+
+  CU_ASSERT(0 == rv);
+
+  /* Receiving stream 5 will erase stream 3 from closed stream list */
+  nread = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                   nghttp2_bufs_len(&bufs));
+
+  CU_ASSERT((ssize_t)nghttp2_bufs_len(&bufs) == nread);
+
+  stream = nghttp2_session_get_stream_raw(session, 3);
+
+  CU_ASSERT(NULL == stream);
+
+  /* Since the current max concurrent streams is
+     NGHTTP2_DEFAULT_MAX_CONCURRENT_STREAMS, receiving frame on stream
+     3 is ignored. */
+  nghttp2_bufs_reset(&bufs);
+  rv = pack_headers(&bufs, deflater, 3,
+                    NGHTTP2_FLAG_END_HEADERS | NGHTTP2_FLAG_END_STREAM,
+                    trailernv, ARRLEN(trailernv), mem);
+
+  CU_ASSERT(0 == rv);
+
+  nread = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                   nghttp2_bufs_len(&bufs));
+
+  CU_ASSERT((ssize_t)nghttp2_bufs_len(&bufs) == nread);
+  CU_ASSERT(NULL == nghttp2_session_get_next_ob_item(session));
+
+  nghttp2_frame_hd_init(&hd, 0, NGHTTP2_DATA, NGHTTP2_FLAG_NONE, 3);
+  nghttp2_bufs_reset(&bufs);
+  nghttp2_frame_pack_frame_hd(bufs.head->buf.last, &hd);
+  bufs.head->buf.last += NGHTTP2_FRAME_HDLEN;
+
+  nread = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                   nghttp2_bufs_len(&bufs));
+
+  CU_ASSERT((ssize_t)nghttp2_bufs_len(&bufs) == nread);
+  CU_ASSERT(NULL == nghttp2_session_get_next_ob_item(session));
+
+  /* Now server receives SETTINGS ACK */
+  nghttp2_frame_hd_init(&hd, 0, NGHTTP2_SETTINGS, NGHTTP2_FLAG_ACK, 0);
+  nghttp2_bufs_reset(&bufs);
+  nghttp2_frame_pack_frame_hd(bufs.head->buf.last, &hd);
+  bufs.head->buf.last += NGHTTP2_FRAME_HDLEN;
+
+  nread = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                   nghttp2_bufs_len(&bufs));
+
+  CU_ASSERT((ssize_t)nghttp2_bufs_len(&bufs) == nread);
+
+  nghttp2_bufs_free(&bufs);
+}
+
+void test_nghttp2_session_removed_closed_stream(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  int rv;
+  nghttp2_hd_deflater deflater;
+  nghttp2_bufs bufs;
+  nghttp2_mem *mem;
+  ssize_t nread;
+  nghttp2_frame_hd hd;
+  nghttp2_outbound_item *item;
+
+  mem = nghttp2_mem_default();
+
+  frame_pack_bufs_init(&bufs);
+
+  memset(&callbacks, 0, sizeof(callbacks));
+
+  callbacks.send_callback = null_send_callback;
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  /* Now local max concurrent streams is still unlimited, pending max
+     concurrent streams is now 2. */
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  prepare_session_removed_closed_stream(session, &deflater);
+
+  /* Now current max concurrent streams is 2.  Receiving frame on
+     stream 3 is ignored because we have no stream object for stream
+     3. */
+  nghttp2_bufs_reset(&bufs);
+  rv = pack_headers(&bufs, &deflater, 3,
+                    NGHTTP2_FLAG_END_HEADERS | NGHTTP2_FLAG_END_STREAM,
+                    trailernv, ARRLEN(trailernv), mem);
+
+  CU_ASSERT(0 == rv);
+
+  nread = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                   nghttp2_bufs_len(&bufs));
+
+  CU_ASSERT((ssize_t)nghttp2_bufs_len(&bufs) == nread);
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(NULL == item);
+
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_session_del(session);
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+  nghttp2_hd_deflate_init(&deflater, mem);
+  /* Same setup, and then receive DATA instead of HEADERS */
+
+  prepare_session_removed_closed_stream(session, &deflater);
+
+  nghttp2_frame_hd_init(&hd, 0, NGHTTP2_DATA, NGHTTP2_FLAG_NONE, 3);
+  nghttp2_bufs_reset(&bufs);
+  nghttp2_frame_pack_frame_hd(bufs.head->buf.last, &hd);
+  bufs.head->buf.last += NGHTTP2_FRAME_HDLEN;
+
+  nread = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                   nghttp2_bufs_len(&bufs));
+
+  CU_ASSERT((ssize_t)nghttp2_bufs_len(&bufs) == nread);
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(NULL == item);
+
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_session_del(session);
+
+  nghttp2_bufs_free(&bufs);
+}
+
+static ssize_t pause_once_data_source_read_callback(
+    nghttp2_session *session, int32_t stream_id, uint8_t *buf, size_t len,
+    uint32_t *data_flags, nghttp2_data_source *source, void *user_data) {
+  my_user_data *ud = user_data;
+  if (ud->data_source_read_cb_paused == 0) {
+    ++ud->data_source_read_cb_paused;
+    return NGHTTP2_ERR_PAUSE;
+  }
+
+  return fixed_length_data_source_read_callback(session, stream_id, buf, len,
+                                                data_flags, source, user_data);
+}
+
+void test_nghttp2_session_pause_data(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_data_provider data_prd;
+  my_user_data ud;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+  callbacks.on_frame_send_callback = on_frame_send_callback;
+
+  data_prd.read_callback = pause_once_data_source_read_callback;
+  ud.data_source_length = NGHTTP2_DATA_PAYLOADLEN;
+
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+
+  open_recv_stream(session, 1);
+
+  CU_ASSERT(
+      0 == nghttp2_submit_data(session, NGHTTP2_FLAG_END_STREAM, 1, &data_prd));
+
+  ud.frame_send_cb_called = 0;
+  ud.data_source_read_cb_paused = 0;
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(0 == ud.frame_send_cb_called);
+  CU_ASSERT(NULL == session->aob.item);
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(1 == ud.frame_send_cb_called);
+  CU_ASSERT(NGHTTP2_DATA == ud.sent_frame_type);
+  CU_ASSERT(NULL == nghttp2_session_get_next_ob_item(session));
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_no_closed_streams(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_option *option;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+
+  nghttp2_option_new(&option);
+  nghttp2_option_set_no_closed_streams(option, 1);
+
+  nghttp2_session_server_new2(&session, &callbacks, NULL, option);
+
+  open_recv_stream(session, 1);
+
+  nghttp2_session_close_stream(session, 1, NGHTTP2_NO_ERROR);
+
+  CU_ASSERT(0 == session->num_closed_streams);
+
+  nghttp2_session_del(session);
+  nghttp2_option_del(option);
+}
+
+void test_nghttp2_session_set_stream_user_data(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  int32_t stream_id;
+  int user_data1, user_data2;
+  int rv;
+  const uint8_t *datap;
+  ssize_t datalen;
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+
+  stream_id = nghttp2_submit_request(session, NULL, reqnv, ARRLEN(reqnv), NULL,
+                                     &user_data1);
+
+  rv = nghttp2_session_set_stream_user_data(session, stream_id, &user_data2);
+
+  CU_ASSERT(0 == rv);
+
+  datalen = nghttp2_session_mem_send(session, &datap);
+
+  CU_ASSERT(datalen > 0);
+
+  CU_ASSERT(&user_data2 ==
+            nghttp2_session_get_stream_user_data(session, stream_id));
+
+  CU_ASSERT(NGHTTP2_ERR_INVALID_ARGUMENT ==
+            nghttp2_session_set_stream_user_data(session, 2, NULL));
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_no_rfc7540_priorities(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_data_provider data_prd;
+  my_user_data ud;
+  nghttp2_outbound_item *item;
+  nghttp2_mem *mem;
+  nghttp2_settings_entry iv;
+  nghttp2_priority_spec pri_spec;
+
+  mem = nghttp2_mem_default();
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  /* Do not use a dependency tree if SETTINGS_NO_RFC7540_PRIORITIES =
+     1. */
+  data_prd.read_callback = fixed_length_data_source_read_callback;
+
+  ud.data_source_length = 128 * 1024;
+  CU_ASSERT(0 == nghttp2_session_server_new(&session, &callbacks, &ud));
+
+  iv.settings_id = NGHTTP2_SETTINGS_NO_RFC7540_PRIORITIES;
+  iv.value = 1;
+
+  CU_ASSERT(0 == nghttp2_submit_settings(session, NGHTTP2_FLAG_NONE, &iv, 1));
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  open_recv_stream2(session, 1, NGHTTP2_STREAM_OPENING);
+  CU_ASSERT(0 == nghttp2_submit_response(session, 1, resnv, ARRLEN(resnv),
+                                         &data_prd));
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(ARRLEN(resnv) == item->frame.headers.nvlen);
+  assert_nv_equal(resnv, item->frame.headers.nva, item->frame.headers.nvlen,
+                  mem);
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  CU_ASSERT(1 == nghttp2_pq_size(
+                     &session->sched[NGHTTP2_EXTPRI_DEFAULT_URGENCY].ob_data));
+  CU_ASSERT(nghttp2_pq_empty(&session->root.obq));
+
+  nghttp2_session_del(session);
+
+  /* Priorities are sent as is before client receives
+     SETTINGS_NO_RFC7540_PRIORITIES = 1 from server. */
+  CU_ASSERT(0 == nghttp2_session_client_new(&session, &callbacks, NULL));
+
+  iv.settings_id = NGHTTP2_SETTINGS_NO_RFC7540_PRIORITIES;
+  iv.value = 1;
+
+  CU_ASSERT(0 == nghttp2_submit_settings(session, NGHTTP2_FLAG_NONE, &iv, 1));
+
+  pri_spec.stream_id = 5;
+  pri_spec.weight = 111;
+  pri_spec.exclusive = 1;
+
+  CU_ASSERT(1 == nghttp2_submit_request(session, &pri_spec, reqnv,
+                                        ARRLEN(reqnv), NULL, NULL));
+
+  item = nghttp2_outbound_queue_top(&session->ob_syn);
+
+  CU_ASSERT(NULL != item);
+  CU_ASSERT(NGHTTP2_HEADERS == item->frame.hd.type);
+  CU_ASSERT(pri_spec.stream_id == item->frame.headers.pri_spec.stream_id);
+  CU_ASSERT(pri_spec.weight == item->frame.headers.pri_spec.weight);
+  CU_ASSERT(pri_spec.exclusive == item->frame.headers.pri_spec.exclusive);
+
+  nghttp2_session_del(session);
+
+  /* Priorities are defaulted if client received
+     SETTINGS_NO_RFC7540_PRIORITIES = 1 from server. */
+  CU_ASSERT(0 == nghttp2_session_client_new(&session, &callbacks, NULL));
+
+  iv.settings_id = NGHTTP2_SETTINGS_NO_RFC7540_PRIORITIES;
+  iv.value = 1;
+
+  CU_ASSERT(0 == nghttp2_submit_settings(session, NGHTTP2_FLAG_NONE, &iv, 1));
+
+  session->remote_settings.no_rfc7540_priorities = 1;
+
+  pri_spec.stream_id = 5;
+  pri_spec.weight = 111;
+  pri_spec.exclusive = 1;
+
+  CU_ASSERT(1 == nghttp2_submit_request(session, &pri_spec, reqnv,
+                                        ARRLEN(reqnv), NULL, NULL));
+
+  item = nghttp2_outbound_queue_top(&session->ob_syn);
+
+  CU_ASSERT(NULL != item);
+  CU_ASSERT(NGHTTP2_HEADERS == item->frame.hd.type);
+  CU_ASSERT(nghttp2_priority_spec_check_default(&item->frame.headers.pri_spec));
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_session_server_fallback_rfc7540_priorities(void) {
+  nghttp2_session *session;
+  nghttp2_option *option;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_frame frame;
+  nghttp2_bufs bufs;
+  nghttp2_buf *buf;
+  ssize_t rv;
+  nghttp2_settings_entry iv;
+  nghttp2_mem *mem;
+  nghttp2_hd_deflater deflater;
+  nghttp2_nv *nva;
+  size_t nvlen;
+  nghttp2_priority_spec pri_spec;
+  nghttp2_stream *anchor_stream, *stream;
+  my_user_data ud;
+  nghttp2_ext_priority_update priority_update;
+  static const uint8_t field_value[] = "u=0";
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+  callbacks.on_frame_recv_callback = on_frame_recv_callback;
+
+  nghttp2_option_new(&option);
+  nghttp2_option_set_server_fallback_rfc7540_priorities(option, 1);
+
+  iv.settings_id = NGHTTP2_SETTINGS_NO_RFC7540_PRIORITIES;
+  iv.value = 1;
+
+  /* Server falls back to RFC 7540 priorities. */
+  nghttp2_session_server_new2(&session, &callbacks, &ud, option);
+
+  rv = nghttp2_submit_settings(session, NGHTTP2_FLAG_NONE, &iv, 1);
+
+  CU_ASSERT(0 == rv);
+
+  rv = nghttp2_session_send(session);
+
+  CU_ASSERT(0 == rv);
+
+  nghttp2_frame_settings_init(&frame.settings, NGHTTP2_FLAG_NONE, NULL, 0);
+  rv = nghttp2_frame_pack_settings(&bufs, &frame.settings);
+
+  CU_ASSERT(0 == rv);
+
+  nghttp2_frame_settings_free(&frame.settings, mem);
+
+  buf = &bufs.head->buf;
+  rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(buf) == rv);
+  CU_ASSERT(1 == session->fallback_rfc7540_priorities);
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  nvlen = ARRLEN(reqnv);
+  nghttp2_nv_array_copy(&nva, reqnv, nvlen, mem);
+  nghttp2_priority_spec_init(&pri_spec, 3, 111, 1);
+  nghttp2_frame_headers_init(&frame.headers,
+                             NGHTTP2_FLAG_END_HEADERS | NGHTTP2_FLAG_PRIORITY,
+                             1, NGHTTP2_HCAT_HEADERS, &pri_spec, nva, nvlen);
+  nghttp2_bufs_reset(&bufs);
+  rv = nghttp2_frame_pack_headers(&bufs, &frame.headers, &deflater);
+
+  CU_ASSERT(0 == rv);
+
+  nghttp2_frame_headers_free(&frame.headers, mem);
+
+  buf = &bufs.head->buf;
+  rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(buf) == rv);
+
+  anchor_stream = nghttp2_session_get_stream_raw(session, 3);
+
+  CU_ASSERT(NGHTTP2_STREAM_IDLE == anchor_stream->state);
+  CU_ASSERT(
+      !(anchor_stream->flags & NGHTTP2_STREAM_FLAG_NO_RFC7540_PRIORITIES));
+  CU_ASSERT(&session->root == anchor_stream->dep_prev);
+
+  stream = nghttp2_session_get_stream(session, 1);
+
+  CU_ASSERT(NGHTTP2_STREAM_OPENING == stream->state);
+  CU_ASSERT(!(stream->flags & NGHTTP2_STREAM_FLAG_NO_RFC7540_PRIORITIES));
+  CU_ASSERT(anchor_stream == stream->dep_prev);
+
+  /* Make sure that PRIORITY frame updates stream priority. */
+  nghttp2_priority_spec_init(&pri_spec, 5, 1, 0);
+  nghttp2_frame_priority_init(&frame.priority, 1, &pri_spec);
+  nghttp2_bufs_reset(&bufs);
+  rv = nghttp2_frame_pack_priority(&bufs, &frame.priority);
+
+  CU_ASSERT(0 == rv);
+
+  nghttp2_frame_priority_free(&frame.priority);
+
+  buf = &bufs.head->buf;
+  rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(buf) == rv);
+
+  anchor_stream = nghttp2_session_get_stream_raw(session, 5);
+
+  CU_ASSERT(NGHTTP2_STREAM_IDLE == anchor_stream->state);
+  CU_ASSERT(&session->root == anchor_stream->dep_prev);
+  CU_ASSERT(anchor_stream == stream->dep_prev);
+
+  /* Make sure that PRIORITY_UPDATE frame is ignored. */
+  frame.ext.payload = &priority_update;
+  nghttp2_frame_priority_update_init(&frame.ext, 1, (uint8_t *)field_value,
+                                     sizeof(field_value) - 1);
+  nghttp2_bufs_reset(&bufs);
+  nghttp2_frame_pack_priority_update(&bufs, &frame.ext);
+
+  ud.frame_recv_cb_called = 0;
+  buf = &bufs.head->buf;
+  rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(buf) == rv);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+  CU_ASSERT(NGHTTP2_EXTPRI_DEFAULT_URGENCY == stream->extpri);
+
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_session_del(session);
+
+  /* Server does not fallback to RFC 7540 priorities. */
+  nghttp2_session_server_new2(&session, &callbacks, &ud, option);
+
+  rv = nghttp2_submit_settings(session, NGHTTP2_FLAG_NONE, &iv, 1);
+
+  CU_ASSERT(0 == rv);
+
+  rv = nghttp2_session_send(session);
+
+  CU_ASSERT(0 == rv);
+
+  iv.settings_id = NGHTTP2_SETTINGS_NO_RFC7540_PRIORITIES;
+  iv.value = 0;
+
+  nghttp2_frame_settings_init(&frame.settings, NGHTTP2_FLAG_NONE,
+                              dup_iv(&iv, 1), 1);
+  nghttp2_bufs_reset(&bufs);
+  rv = nghttp2_frame_pack_settings(&bufs, &frame.settings);
+
+  CU_ASSERT(0 == rv);
+
+  nghttp2_frame_settings_free(&frame.settings, mem);
+
+  buf = &bufs.head->buf;
+  rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(buf) == rv);
+  CU_ASSERT(0 == session->fallback_rfc7540_priorities);
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  nvlen = ARRLEN(reqnv);
+  nghttp2_nv_array_copy(&nva, reqnv, nvlen, mem);
+  nghttp2_priority_spec_init(&pri_spec, 3, 111, 1);
+  nghttp2_frame_headers_init(&frame.headers,
+                             NGHTTP2_FLAG_END_HEADERS | NGHTTP2_FLAG_PRIORITY,
+                             1, NGHTTP2_HCAT_HEADERS, &pri_spec, nva, nvlen);
+  nghttp2_bufs_reset(&bufs);
+  rv = nghttp2_frame_pack_headers(&bufs, &frame.headers, &deflater);
+
+  CU_ASSERT(0 == rv);
+
+  nghttp2_frame_headers_free(&frame.headers, mem);
+
+  buf = &bufs.head->buf;
+  rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(buf) == rv);
+  CU_ASSERT(NULL == nghttp2_session_get_stream_raw(session, 3));
+
+  stream = nghttp2_session_get_stream(session, 1);
+
+  CU_ASSERT(NGHTTP2_STREAM_OPENING == stream->state);
+  CU_ASSERT(stream->flags & NGHTTP2_STREAM_FLAG_NO_RFC7540_PRIORITIES);
+
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_session_del(session);
+
+  nghttp2_option_del(option);
+  nghttp2_bufs_free(&bufs);
+}
+
+static void check_nghttp2_http_recv_headers_fail(
+    nghttp2_session *session, nghttp2_hd_deflater *deflater, int32_t stream_id,
+    int stream_state, const nghttp2_nv *nva, size_t nvlen) {
+  nghttp2_mem *mem;
+  ssize_t rv;
+  nghttp2_outbound_item *item;
+  nghttp2_bufs bufs;
+  my_user_data *ud;
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+
+  ud = session->user_data;
+
+  if (stream_state != -1) {
+    if (nghttp2_session_is_my_stream_id(session, stream_id)) {
+      open_sent_stream2(session, stream_id, (nghttp2_stream_state)stream_state);
+    } else {
+      open_recv_stream2(session, stream_id, (nghttp2_stream_state)stream_state);
+    }
+  }
+
+  rv = pack_headers(&bufs, deflater, stream_id, NGHTTP2_FLAG_END_HEADERS, nva,
+                    nvlen, mem);
+  CU_ASSERT(0 == rv);
+
+  ud->invalid_frame_recv_cb_called = 0;
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(NGHTTP2_RST_STREAM == item->frame.hd.type);
+  CU_ASSERT(1 == ud->invalid_frame_recv_cb_called);
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  nghttp2_bufs_free(&bufs);
+}
+
+static void check_nghttp2_http_recv_headers_ok(
+    nghttp2_session *session, nghttp2_hd_deflater *deflater, int32_t stream_id,
+    int stream_state, const nghttp2_nv *nva, size_t nvlen) {
+  nghttp2_mem *mem;
+  ssize_t rv;
+  nghttp2_bufs bufs;
+  my_user_data *ud;
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+
+  ud = session->user_data;
+
+  if (stream_state != -1) {
+    if (nghttp2_session_is_my_stream_id(session, stream_id)) {
+      open_sent_stream2(session, stream_id, (nghttp2_stream_state)stream_state);
+    } else {
+      open_recv_stream2(session, stream_id, (nghttp2_stream_state)stream_state);
+    }
+  }
+
+  rv = pack_headers(&bufs, deflater, stream_id, NGHTTP2_FLAG_END_HEADERS, nva,
+                    nvlen, mem);
+  CU_ASSERT(0 == rv);
+
+  ud->frame_recv_cb_called = 0;
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+  CU_ASSERT(NULL == nghttp2_session_get_next_ob_item(session));
+  CU_ASSERT(1 == ud->frame_recv_cb_called);
+
+  nghttp2_bufs_free(&bufs);
+}
+
+void test_nghttp2_http_mandatory_headers(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_hd_deflater deflater;
+  nghttp2_mem *mem;
+  my_user_data ud;
+  /* test case for response */
+  const nghttp2_nv nostatus_resnv[] = {MAKE_NV("server", "foo")};
+  const nghttp2_nv dupstatus_resnv[] = {MAKE_NV(":status", "200"),
+                                        MAKE_NV(":status", "200")};
+  const nghttp2_nv badpseudo_resnv[] = {MAKE_NV(":status", "200"),
+                                        MAKE_NV(":scheme", "https")};
+  const nghttp2_nv latepseudo_resnv[] = {MAKE_NV("server", "foo"),
+                                         MAKE_NV(":status", "200")};
+  const nghttp2_nv badstatus_resnv[] = {MAKE_NV(":status", "2000")};
+  const nghttp2_nv badcl_resnv[] = {MAKE_NV(":status", "200"),
+                                    MAKE_NV("content-length", "-1")};
+  const nghttp2_nv dupcl_resnv[] = {MAKE_NV(":status", "200"),
+                                    MAKE_NV("content-length", "0"),
+                                    MAKE_NV("content-length", "0")};
+  const nghttp2_nv badhd_resnv[] = {MAKE_NV(":status", "200"),
+                                    MAKE_NV("connection", "close")};
+  const nghttp2_nv cl1xx_resnv[] = {MAKE_NV(":status", "100"),
+                                    MAKE_NV("content-length", "0")};
+  const nghttp2_nv cl204_resnv[] = {MAKE_NV(":status", "204"),
+                                    MAKE_NV("content-length", "0")};
+  const nghttp2_nv clnonzero204_resnv[] = {MAKE_NV(":status", "204"),
+                                           MAKE_NV("content-length", "100")};
+  const nghttp2_nv status101_resnv[] = {MAKE_NV(":status", "101")};
+  const nghttp2_nv unexpectedhost_resnv[] = {MAKE_NV(":status", "200"),
+                                             MAKE_NV("host", "/localhost")};
+
+  /* test case for request */
+  const nghttp2_nv nopath_reqnv[] = {MAKE_NV(":scheme", "https"),
+                                     MAKE_NV(":method", "GET"),
+                                     MAKE_NV(":authority", "localhost")};
+  const nghttp2_nv earlyconnect_reqnv[] = {
+      MAKE_NV(":method", "CONNECT"), MAKE_NV(":scheme", "https"),
+      MAKE_NV(":path", "/"), MAKE_NV(":authority", "localhost")};
+  const nghttp2_nv lateconnect_reqnv[] = {
+      MAKE_NV(":scheme", "https"), MAKE_NV(":path", "/"),
+      MAKE_NV(":method", "CONNECT"), MAKE_NV(":authority", "localhost")};
+  const nghttp2_nv duppath_reqnv[] = {
+      MAKE_NV(":scheme", "https"), MAKE_NV(":method", "GET"),
+      MAKE_NV(":authority", "localhost"), MAKE_NV(":path", "/"),
+      MAKE_NV(":path", "/")};
+  const nghttp2_nv badcl_reqnv[] = {
+      MAKE_NV(":scheme", "https"), MAKE_NV(":method", "POST"),
+      MAKE_NV(":authority", "localhost"), MAKE_NV(":path", "/"),
+      MAKE_NV("content-length", "-1")};
+  const nghttp2_nv dupcl_reqnv[] = {
+      MAKE_NV(":scheme", "https"),        MAKE_NV(":method", "POST"),
+      MAKE_NV(":authority", "localhost"), MAKE_NV(":path", "/"),
+      MAKE_NV("content-length", "0"),     MAKE_NV("content-length", "0")};
+  const nghttp2_nv badhd_reqnv[] = {
+      MAKE_NV(":scheme", "https"), MAKE_NV(":method", "GET"),
+      MAKE_NV(":authority", "localhost"), MAKE_NV(":path", "/"),
+      MAKE_NV("connection", "close")};
+  const nghttp2_nv badauthority_reqnv[] = {
+      MAKE_NV(":scheme", "https"), MAKE_NV(":method", "GET"),
+      MAKE_NV(":authority", "\x0d\x0alocalhost"), MAKE_NV(":path", "/")};
+  const nghttp2_nv badhdbtw_reqnv[] = {
+      MAKE_NV(":scheme", "https"), MAKE_NV(":method", "GET"),
+      MAKE_NV("foo", "\x0d\x0a"), MAKE_NV(":authority", "localhost"),
+      MAKE_NV(":path", "/")};
+  const nghttp2_nv asteriskget1_reqnv[] = {
+      MAKE_NV(":path", "*"), MAKE_NV(":scheme", "https"),
+      MAKE_NV(":authority", "localhost"), MAKE_NV(":method", "GET")};
+  const nghttp2_nv asteriskget2_reqnv[] = {
+      MAKE_NV(":scheme", "https"), MAKE_NV(":authority", "localhost"),
+      MAKE_NV(":method", "GET"), MAKE_NV(":path", "*")};
+  const nghttp2_nv asteriskoptions1_reqnv[] = {
+      MAKE_NV(":path", "*"), MAKE_NV(":scheme", "https"),
+      MAKE_NV(":authority", "localhost"), MAKE_NV(":method", "OPTIONS")};
+  const nghttp2_nv asteriskoptions2_reqnv[] = {
+      MAKE_NV(":scheme", "https"), MAKE_NV(":authority", "localhost"),
+      MAKE_NV(":method", "OPTIONS"), MAKE_NV(":path", "*")};
+  const nghttp2_nv connectproto_reqnv[] = {
+      MAKE_NV(":scheme", "https"), MAKE_NV(":path", "/"),
+      MAKE_NV(":method", "CONNECT"), MAKE_NV(":authority", "localhost"),
+      MAKE_NV(":protocol", "websocket")};
+  const nghttp2_nv connectprotoget_reqnv[] = {
+      MAKE_NV(":scheme", "https"), MAKE_NV(":path", "/"),
+      MAKE_NV(":method", "GET"), MAKE_NV(":authority", "localhost"),
+      MAKE_NV(":protocol", "websocket")};
+  const nghttp2_nv connectprotonopath_reqnv[] = {
+      MAKE_NV(":scheme", "https"), MAKE_NV(":method", "CONNECT"),
+      MAKE_NV(":authority", "localhost"), MAKE_NV(":protocol", "websocket")};
+  const nghttp2_nv connectprotonoauth_reqnv[] = {
+      MAKE_NV(":scheme", "http"), MAKE_NV(":path", "/"),
+      MAKE_NV(":method", "CONNECT"), MAKE_NV("host", "localhost"),
+      MAKE_NV(":protocol", "websocket")};
+  const nghttp2_nv regularconnect_reqnv[] = {
+      MAKE_NV(":method", "CONNECT"), MAKE_NV(":authority", "localhost")};
+
+  mem = nghttp2_mem_default();
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+  callbacks.on_frame_recv_callback = on_frame_recv_callback;
+  callbacks.on_invalid_frame_recv_callback = on_invalid_frame_recv_callback;
+
+  nghttp2_session_client_new(&session, &callbacks, &ud);
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  /* response header lacks :status */
+  check_nghttp2_http_recv_headers_fail(session, &deflater, 1,
+                                       NGHTTP2_STREAM_OPENING, nostatus_resnv,
+                                       ARRLEN(nostatus_resnv));
+
+  /* response header has 2 :status */
+  check_nghttp2_http_recv_headers_fail(session, &deflater, 3,
+                                       NGHTTP2_STREAM_OPENING, dupstatus_resnv,
+                                       ARRLEN(dupstatus_resnv));
+
+  /* response header has bad pseudo header :scheme */
+  check_nghttp2_http_recv_headers_fail(session, &deflater, 5,
+                                       NGHTTP2_STREAM_OPENING, badpseudo_resnv,
+                                       ARRLEN(badpseudo_resnv));
+
+  /* response header has :status after regular header field */
+  check_nghttp2_http_recv_headers_fail(session, &deflater, 7,
+                                       NGHTTP2_STREAM_OPENING, latepseudo_resnv,
+                                       ARRLEN(latepseudo_resnv));
+
+  /* response header has bad status code */
+  check_nghttp2_http_recv_headers_fail(session, &deflater, 9,
+                                       NGHTTP2_STREAM_OPENING, badstatus_resnv,
+                                       ARRLEN(badstatus_resnv));
+
+  /* response header has bad content-length */
+  check_nghttp2_http_recv_headers_fail(session, &deflater, 11,
+                                       NGHTTP2_STREAM_OPENING, badcl_resnv,
+                                       ARRLEN(badcl_resnv));
+
+  /* response header has multiple content-length */
+  check_nghttp2_http_recv_headers_fail(session, &deflater, 13,
+                                       NGHTTP2_STREAM_OPENING, dupcl_resnv,
+                                       ARRLEN(dupcl_resnv));
+
+  /* response header has disallowed header field */
+  check_nghttp2_http_recv_headers_fail(session, &deflater, 15,
+                                       NGHTTP2_STREAM_OPENING, badhd_resnv,
+                                       ARRLEN(badhd_resnv));
+
+  /* response header has content-length with 100 status code */
+  check_nghttp2_http_recv_headers_fail(session, &deflater, 17,
+                                       NGHTTP2_STREAM_OPENING, cl1xx_resnv,
+                                       ARRLEN(cl1xx_resnv));
+
+  /* response header has 0 content-length with 204 status code */
+  check_nghttp2_http_recv_headers_ok(session, &deflater, 19,
+                                     NGHTTP2_STREAM_OPENING, cl204_resnv,
+                                     ARRLEN(cl204_resnv));
+
+  /* response header has nonzero content-length with 204 status
+     code */
+  check_nghttp2_http_recv_headers_fail(
+      session, &deflater, 21, NGHTTP2_STREAM_OPENING, clnonzero204_resnv,
+      ARRLEN(clnonzero204_resnv));
+
+  /* status code 101 should not be used in HTTP/2 because it is used
+     for HTTP Upgrade which HTTP/2 removes. */
+  check_nghttp2_http_recv_headers_fail(session, &deflater, 23,
+                                       NGHTTP2_STREAM_OPENING, status101_resnv,
+                                       ARRLEN(status101_resnv));
+
+  /* Specific characters check for host field in response header
+     should not be done as its use is undefined. */
+  check_nghttp2_http_recv_headers_ok(
+      session, &deflater, 25, NGHTTP2_STREAM_OPENING, unexpectedhost_resnv,
+      ARRLEN(unexpectedhost_resnv));
+
+  nghttp2_hd_deflate_free(&deflater);
+
+  nghttp2_session_del(session);
+
+  /* check server side */
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  /* request header has no :path */
+  check_nghttp2_http_recv_headers_fail(session, &deflater, 1, -1, nopath_reqnv,
+                                       ARRLEN(nopath_reqnv));
+
+  /* request header has CONNECT method, but followed by :path */
+  check_nghttp2_http_recv_headers_fail(session, &deflater, 3, -1,
+                                       earlyconnect_reqnv,
+                                       ARRLEN(earlyconnect_reqnv));
+
+  /* request header has CONNECT method following :path */
+  check_nghttp2_http_recv_headers_fail(
+      session, &deflater, 5, -1, lateconnect_reqnv, ARRLEN(lateconnect_reqnv));
+
+  /* request header has multiple :path */
+  check_nghttp2_http_recv_headers_fail(session, &deflater, 7, -1, duppath_reqnv,
+                                       ARRLEN(duppath_reqnv));
+
+  /* request header has bad content-length */
+  check_nghttp2_http_recv_headers_fail(session, &deflater, 9, -1, badcl_reqnv,
+                                       ARRLEN(badcl_reqnv));
+
+  /* request header has multiple content-length */
+  check_nghttp2_http_recv_headers_fail(session, &deflater, 11, -1, dupcl_reqnv,
+                                       ARRLEN(dupcl_reqnv));
+
+  /* request header has disallowed header field */
+  check_nghttp2_http_recv_headers_fail(session, &deflater, 13, -1, badhd_reqnv,
+                                       ARRLEN(badhd_reqnv));
+
+  /* request header has :authority header field containing illegal
+     characters */
+  check_nghttp2_http_recv_headers_fail(session, &deflater, 15, -1,
+                                       badauthority_reqnv,
+                                       ARRLEN(badauthority_reqnv));
+
+  /* request header has regular header field containing illegal
+     character before all mandatory header fields are seen. */
+  check_nghttp2_http_recv_headers_fail(session, &deflater, 17, -1,
+                                       badhdbtw_reqnv, ARRLEN(badhdbtw_reqnv));
+
+  /* request header has "*" in :path header field while method is GET.
+     :path is received before :method */
+  check_nghttp2_http_recv_headers_fail(session, &deflater, 19, -1,
+                                       asteriskget1_reqnv,
+                                       ARRLEN(asteriskget1_reqnv));
+
+  /* request header has "*" in :path header field while method is GET.
+     :method is received before :path */
+  check_nghttp2_http_recv_headers_fail(session, &deflater, 21, -1,
+                                       asteriskget2_reqnv,
+                                       ARRLEN(asteriskget2_reqnv));
+
+  /* OPTIONS method can include "*" in :path header field.  :path is
+     received before :method. */
+  check_nghttp2_http_recv_headers_ok(session, &deflater, 23, -1,
+                                     asteriskoptions1_reqnv,
+                                     ARRLEN(asteriskoptions1_reqnv));
+
+  /* OPTIONS method can include "*" in :path header field.  :method is
+     received before :path. */
+  check_nghttp2_http_recv_headers_ok(session, &deflater, 25, -1,
+                                     asteriskoptions2_reqnv,
+                                     ARRLEN(asteriskoptions2_reqnv));
+
+  /* :protocol is not allowed unless it is enabled by the local
+     endpoint. */
+  check_nghttp2_http_recv_headers_fail(session, &deflater, 27, -1,
+                                       connectproto_reqnv,
+                                       ARRLEN(connectproto_reqnv));
+
+  nghttp2_hd_deflate_free(&deflater);
+
+  nghttp2_session_del(session);
+
+  /* enable SETTINGS_CONNECT_PROTOCOL */
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+
+  session->pending_enable_connect_protocol = 1;
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  /* :protocol is allowed if SETTINGS_CONNECT_PROTOCOL is enabled by
+     the local endpoint. */
+  check_nghttp2_http_recv_headers_ok(session, &deflater, 1, -1,
+                                     connectproto_reqnv,
+                                     ARRLEN(connectproto_reqnv));
+
+  /* :protocol is only allowed with CONNECT method. */
+  check_nghttp2_http_recv_headers_fail(session, &deflater, 3, -1,
+                                       connectprotoget_reqnv,
+                                       ARRLEN(connectprotoget_reqnv));
+
+  /* CONNECT method with :protocol requires :path. */
+  check_nghttp2_http_recv_headers_fail(session, &deflater, 5, -1,
+                                       connectprotonopath_reqnv,
+                                       ARRLEN(connectprotonopath_reqnv));
+
+  /* CONNECT method with :protocol requires :authority. */
+  check_nghttp2_http_recv_headers_fail(session, &deflater, 7, -1,
+                                       connectprotonoauth_reqnv,
+                                       ARRLEN(connectprotonoauth_reqnv));
+
+  /* regular CONNECT method should succeed with
+     SETTINGS_CONNECT_PROTOCOL */
+  check_nghttp2_http_recv_headers_ok(session, &deflater, 9, -1,
+                                     regularconnect_reqnv,
+                                     ARRLEN(regularconnect_reqnv));
+
+  nghttp2_hd_deflate_free(&deflater);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_http_content_length(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_hd_deflater deflater;
+  nghttp2_mem *mem;
+  nghttp2_bufs bufs;
+  ssize_t rv;
+  nghttp2_stream *stream;
+  const nghttp2_nv cl_resnv[] = {MAKE_NV(":status", "200"),
+                                 MAKE_NV("te", "trailers"),
+                                 MAKE_NV("content-length", "9000000000")};
+  const nghttp2_nv cl_reqnv[] = {
+      MAKE_NV(":path", "/"),        MAKE_NV(":method", "PUT"),
+      MAKE_NV(":scheme", "https"),  MAKE_NV("te", "trailers"),
+      MAKE_NV("host", "localhost"), MAKE_NV("content-length", "9000000000")};
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  stream = open_sent_stream2(session, 1, NGHTTP2_STREAM_OPENING);
+
+  rv = pack_headers(&bufs, &deflater, 1, NGHTTP2_FLAG_END_HEADERS, cl_resnv,
+                    ARRLEN(cl_resnv), mem);
+  CU_ASSERT(0 == rv);
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+  CU_ASSERT(NULL == nghttp2_session_get_next_ob_item(session));
+  CU_ASSERT(9000000000LL == stream->content_length);
+  CU_ASSERT(200 == stream->status_code);
+
+  nghttp2_hd_deflate_free(&deflater);
+
+  nghttp2_session_del(session);
+
+  nghttp2_bufs_reset(&bufs);
+
+  /* check server side */
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  rv = pack_headers(&bufs, &deflater, 1, NGHTTP2_FLAG_END_HEADERS, cl_reqnv,
+                    ARRLEN(cl_reqnv), mem);
+  CU_ASSERT(0 == rv);
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+
+  stream = nghttp2_session_get_stream(session, 1);
+
+  CU_ASSERT(NULL == nghttp2_session_get_next_ob_item(session));
+  CU_ASSERT(9000000000LL == stream->content_length);
+
+  nghttp2_hd_deflate_free(&deflater);
+
+  nghttp2_session_del(session);
+
+  nghttp2_bufs_free(&bufs);
+}
+
+void test_nghttp2_http_content_length_mismatch(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_hd_deflater deflater;
+  nghttp2_mem *mem;
+  nghttp2_bufs bufs;
+  ssize_t rv;
+  const nghttp2_nv cl_reqnv[] = {
+      MAKE_NV(":path", "/"), MAKE_NV(":method", "PUT"),
+      MAKE_NV(":authority", "localhost"), MAKE_NV(":scheme", "https"),
+      MAKE_NV("content-length", "20")};
+  const nghttp2_nv cl_resnv[] = {MAKE_NV(":status", "200"),
+                                 MAKE_NV("content-length", "20")};
+  nghttp2_outbound_item *item;
+  nghttp2_frame_hd hd;
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  /* header says content-length: 20, but HEADERS has END_STREAM flag set */
+  rv = pack_headers(&bufs, &deflater, 1,
+                    NGHTTP2_FLAG_END_HEADERS | NGHTTP2_FLAG_END_STREAM,
+                    cl_reqnv, ARRLEN(cl_reqnv), mem);
+  CU_ASSERT(0 == rv);
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_RST_STREAM == item->frame.hd.type);
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  nghttp2_bufs_reset(&bufs);
+
+  /* header says content-length: 20, but DATA has 0 byte */
+  rv = pack_headers(&bufs, &deflater, 3, NGHTTP2_FLAG_END_HEADERS, cl_reqnv,
+                    ARRLEN(cl_reqnv), mem);
+  CU_ASSERT(0 == rv);
+
+  nghttp2_frame_hd_init(&hd, 0, NGHTTP2_DATA, NGHTTP2_FLAG_END_STREAM, 3);
+  nghttp2_frame_pack_frame_hd(bufs.head->buf.last, &hd);
+  bufs.head->buf.last += NGHTTP2_FRAME_HDLEN;
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_RST_STREAM == item->frame.hd.type);
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  nghttp2_bufs_reset(&bufs);
+
+  /* header says content-length: 20, but DATA has 21 bytes */
+  rv = pack_headers(&bufs, &deflater, 5, NGHTTP2_FLAG_END_HEADERS, cl_reqnv,
+                    ARRLEN(cl_reqnv), mem);
+  CU_ASSERT(0 == rv);
+
+  nghttp2_frame_hd_init(&hd, 21, NGHTTP2_DATA, NGHTTP2_FLAG_END_STREAM, 5);
+  nghttp2_frame_pack_frame_hd(bufs.head->buf.last, &hd);
+  bufs.head->buf.last += NGHTTP2_FRAME_HDLEN + 21;
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_RST_STREAM == item->frame.hd.type);
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  nghttp2_bufs_reset(&bufs);
+
+  nghttp2_hd_deflate_free(&deflater);
+
+  nghttp2_session_del(session);
+
+  /* Check for client */
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  /* header says content-length: 20, but HEADERS has END_STREAM flag set */
+  nghttp2_submit_request(session, NULL, reqnv, ARRLEN(reqnv), NULL, NULL);
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  rv = pack_headers(&bufs, &deflater, 1,
+                    NGHTTP2_FLAG_END_HEADERS | NGHTTP2_FLAG_END_STREAM,
+                    cl_resnv, ARRLEN(cl_resnv), mem);
+  CU_ASSERT(0 == rv);
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_RST_STREAM == item->frame.hd.type);
+
+  CU_ASSERT(NULL != nghttp2_session_get_stream(session, 1));
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  /* After sending RST_STREAM, stream must be closed */
+  CU_ASSERT(NULL == nghttp2_session_get_stream(session, 1));
+
+  nghttp2_bufs_reset(&bufs);
+
+  /* header says content-length: 20, but DATA has 0 byte */
+  nghttp2_submit_request(session, NULL, reqnv, ARRLEN(reqnv), NULL, NULL);
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  rv = pack_headers(&bufs, &deflater, 3, NGHTTP2_FLAG_END_HEADERS, cl_resnv,
+                    ARRLEN(cl_resnv), mem);
+  CU_ASSERT(0 == rv);
+
+  nghttp2_frame_hd_init(&hd, 0, NGHTTP2_DATA, NGHTTP2_FLAG_END_STREAM, 3);
+  nghttp2_frame_pack_frame_hd(bufs.head->buf.last, &hd);
+  bufs.head->buf.last += NGHTTP2_FRAME_HDLEN;
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_RST_STREAM == item->frame.hd.type);
+
+  CU_ASSERT(NULL != nghttp2_session_get_stream(session, 3));
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  /* After sending RST_STREAM, stream must be closed */
+  CU_ASSERT(NULL == nghttp2_session_get_stream(session, 3));
+
+  nghttp2_bufs_reset(&bufs);
+
+  /* header says content-length: 20, but DATA has 21 bytes */
+  nghttp2_submit_request(session, NULL, reqnv, ARRLEN(reqnv), NULL, NULL);
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  rv = pack_headers(&bufs, &deflater, 5, NGHTTP2_FLAG_END_HEADERS, cl_resnv,
+                    ARRLEN(cl_resnv), mem);
+  CU_ASSERT(0 == rv);
+
+  nghttp2_frame_hd_init(&hd, 21, NGHTTP2_DATA, NGHTTP2_FLAG_END_STREAM, 5);
+  nghttp2_frame_pack_frame_hd(bufs.head->buf.last, &hd);
+  bufs.head->buf.last += NGHTTP2_FRAME_HDLEN + 21;
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_RST_STREAM == item->frame.hd.type);
+
+  CU_ASSERT(NULL != nghttp2_session_get_stream(session, 5));
+  CU_ASSERT(0 == nghttp2_session_send(session));
+  /* After sending RST_STREAM, stream must be closed */
+  CU_ASSERT(NULL == nghttp2_session_get_stream(session, 5));
+
+  nghttp2_bufs_reset(&bufs);
+
+  nghttp2_bufs_free(&bufs);
+
+  nghttp2_hd_deflate_free(&deflater);
+
+  nghttp2_session_del(session);
+}
+
+void test_nghttp2_http_non_final_response(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_hd_deflater deflater;
+  nghttp2_mem *mem;
+  nghttp2_bufs bufs;
+  ssize_t rv;
+  const nghttp2_nv nonfinal_resnv[] = {
+      MAKE_NV(":status", "100"),
+  };
+  nghttp2_outbound_item *item;
+  nghttp2_frame_hd hd;
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  /* non-final HEADERS with END_STREAM is illegal */
+  open_sent_stream2(session, 1, NGHTTP2_STREAM_OPENING);
+
+  rv = pack_headers(&bufs, &deflater, 1,
+                    NGHTTP2_FLAG_END_HEADERS | NGHTTP2_FLAG_END_STREAM,
+                    nonfinal_resnv, ARRLEN(nonfinal_resnv), mem);
+  CU_ASSERT(0 == rv);
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_RST_STREAM == item->frame.hd.type);
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  nghttp2_bufs_reset(&bufs);
+
+  /* non-final HEADERS followed by non-empty DATA is illegal */
+  open_sent_stream2(session, 3, NGHTTP2_STREAM_OPENING);
+
+  rv = pack_headers(&bufs, &deflater, 3, NGHTTP2_FLAG_END_HEADERS,
+                    nonfinal_resnv, ARRLEN(nonfinal_resnv), mem);
+  CU_ASSERT(0 == rv);
+
+  nghttp2_frame_hd_init(&hd, 10, NGHTTP2_DATA, NGHTTP2_FLAG_END_STREAM, 3);
+  nghttp2_frame_pack_frame_hd(bufs.head->buf.last, &hd);
+  bufs.head->buf.last += NGHTTP2_FRAME_HDLEN + 10;
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+
+  item = nghttp2_session_get_next_ob_item(session);
+  CU_ASSERT(NGHTTP2_RST_STREAM == item->frame.hd.type);
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  nghttp2_bufs_reset(&bufs);
+
+  /* non-final HEADERS followed by empty DATA (without END_STREAM) is
+     ok */
+  open_sent_stream2(session, 5, NGHTTP2_STREAM_OPENING);
+
+  rv = pack_headers(&bufs, &deflater, 5, NGHTTP2_FLAG_END_HEADERS,
+                    nonfinal_resnv, ARRLEN(nonfinal_resnv), mem);
+  CU_ASSERT(0 == rv);
+
+  nghttp2_frame_hd_init(&hd, 0, NGHTTP2_DATA, NGHTTP2_FLAG_NONE, 5);
+  nghttp2_frame_pack_frame_hd(bufs.head->buf.last, &hd);
+  bufs.head->buf.last += NGHTTP2_FRAME_HDLEN;
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+
+  CU_ASSERT(NULL == nghttp2_session_get_next_ob_item(session));
+
+  nghttp2_bufs_reset(&bufs);
+
+  /* non-final HEADERS followed by empty DATA (with END_STREAM) is
+     illegal */
+  open_sent_stream2(session, 7, NGHTTP2_STREAM_OPENING);
+
+  rv = pack_headers(&bufs, &deflater, 7, NGHTTP2_FLAG_END_HEADERS,
+                    nonfinal_resnv, ARRLEN(nonfinal_resnv), mem);
+  CU_ASSERT(0 == rv);
+
+  nghttp2_frame_hd_init(&hd, 0, NGHTTP2_DATA, NGHTTP2_FLAG_END_STREAM, 7);
+  nghttp2_frame_pack_frame_hd(bufs.head->buf.last, &hd);
+  bufs.head->buf.last += NGHTTP2_FRAME_HDLEN;
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(NGHTTP2_RST_STREAM == item->frame.hd.type);
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  nghttp2_bufs_reset(&bufs);
+
+  /* non-final HEADERS followed by final HEADERS is OK */
+  open_sent_stream2(session, 9, NGHTTP2_STREAM_OPENING);
+
+  rv = pack_headers(&bufs, &deflater, 9, NGHTTP2_FLAG_END_HEADERS,
+                    nonfinal_resnv, ARRLEN(nonfinal_resnv), mem);
+  CU_ASSERT(0 == rv);
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+
+  nghttp2_bufs_reset(&bufs);
+
+  rv = pack_headers(&bufs, &deflater, 9, NGHTTP2_FLAG_END_HEADERS, resnv,
+                    ARRLEN(resnv), mem);
+  CU_ASSERT(0 == rv);
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+
+  CU_ASSERT(NULL == nghttp2_session_get_next_ob_item(session));
+
+  nghttp2_bufs_reset(&bufs);
+
+  nghttp2_hd_deflate_free(&deflater);
+
+  nghttp2_session_del(session);
+
+  nghttp2_bufs_free(&bufs);
+}
+
+void test_nghttp2_http_trailer_headers(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_hd_deflater deflater;
+  nghttp2_mem *mem;
+  nghttp2_bufs bufs;
+  ssize_t rv;
+  const nghttp2_nv trailer_reqnv[] = {
+      MAKE_NV("foo", "bar"),
+  };
+  nghttp2_outbound_item *item;
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  /* good trailer header */
+  rv = pack_headers(&bufs, &deflater, 1, NGHTTP2_FLAG_END_HEADERS, reqnv,
+                    ARRLEN(reqnv), mem);
+  CU_ASSERT(0 == rv);
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+
+  nghttp2_bufs_reset(&bufs);
+
+  rv = pack_headers(&bufs, &deflater, 1,
+                    NGHTTP2_FLAG_END_HEADERS | NGHTTP2_FLAG_END_STREAM,
+                    trailer_reqnv, ARRLEN(trailer_reqnv), mem);
+  CU_ASSERT(0 == rv);
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+
+  CU_ASSERT(NULL == nghttp2_session_get_next_ob_item(session));
+
+  nghttp2_bufs_reset(&bufs);
+
+  /* trailer header without END_STREAM is illegal */
+  rv = pack_headers(&bufs, &deflater, 3, NGHTTP2_FLAG_END_HEADERS, reqnv,
+                    ARRLEN(reqnv), mem);
+  CU_ASSERT(0 == rv);
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+
+  nghttp2_bufs_reset(&bufs);
+
+  rv = pack_headers(&bufs, &deflater, 3, NGHTTP2_FLAG_END_HEADERS,
+                    trailer_reqnv, ARRLEN(trailer_reqnv), mem);
+  CU_ASSERT(0 == rv);
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(NGHTTP2_RST_STREAM == item->frame.hd.type);
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  nghttp2_bufs_reset(&bufs);
+
+  /* trailer header including pseudo header field is illegal */
+  rv = pack_headers(&bufs, &deflater, 5, NGHTTP2_FLAG_END_HEADERS, reqnv,
+                    ARRLEN(reqnv), mem);
+  CU_ASSERT(0 == rv);
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+
+  nghttp2_bufs_reset(&bufs);
+
+  rv = pack_headers(&bufs, &deflater, 5, NGHTTP2_FLAG_END_HEADERS, reqnv,
+                    ARRLEN(reqnv), mem);
+  CU_ASSERT(0 == rv);
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(NGHTTP2_RST_STREAM == item->frame.hd.type);
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  nghttp2_bufs_reset(&bufs);
+
+  nghttp2_hd_deflate_free(&deflater);
+
+  nghttp2_session_del(session);
+
+  nghttp2_bufs_free(&bufs);
+}
+
+void test_nghttp2_http_ignore_regular_header(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_hd_deflater deflater;
+  nghttp2_mem *mem;
+  nghttp2_bufs bufs;
+  ssize_t rv;
+  my_user_data ud;
+  const nghttp2_nv bad_reqnv[] = {
+      MAKE_NV(":authority", "localhost"),
+      MAKE_NV(":scheme", "https"),
+      MAKE_NV(":path", "/"),
+      MAKE_NV(":method", "GET"),
+      MAKE_NV("foo", "\x0zzz"),
+      MAKE_NV("bar", "buzz"),
+  };
+  const nghttp2_nv bad_ansnv[] = {
+      MAKE_NV(":authority", "localhost"), MAKE_NV(":scheme", "https"),
+      MAKE_NV(":path", "/"), MAKE_NV(":method", "GET"), MAKE_NV("bar", "buzz")};
+  size_t proclen;
+  size_t i;
+  nghttp2_outbound_item *item;
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+  callbacks.on_header_callback = pause_on_header_callback;
+
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  rv = pack_headers(&bufs, &deflater, 1,
+                    NGHTTP2_FLAG_END_HEADERS | NGHTTP2_FLAG_END_STREAM,
+                    bad_reqnv, ARRLEN(bad_reqnv), mem);
+
+  CU_ASSERT_FATAL(0 == rv);
+
+  nghttp2_hd_deflate_free(&deflater);
+
+  proclen = 0;
+
+  for (i = 0; i < 4; ++i) {
+    rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos + proclen,
+                                  nghttp2_buf_len(&bufs.head->buf) - proclen);
+    CU_ASSERT_FATAL(rv > 0);
+    proclen += (size_t)rv;
+    CU_ASSERT(nghttp2_nv_equal(&bad_ansnv[i], &ud.nv));
+  }
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos + proclen,
+                                nghttp2_buf_len(&bufs.head->buf) - proclen);
+  CU_ASSERT_FATAL(rv > 0);
+  /* Without on_invalid_frame_recv_callback, bad header causes stream
+     reset */
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(NGHTTP2_RST_STREAM == item->frame.hd.type);
+
+  proclen += (size_t)rv;
+
+  CU_ASSERT(nghttp2_buf_len(&bufs.head->buf) == proclen);
+
+  nghttp2_session_del(session);
+
+  /* use on_invalid_header_callback */
+  callbacks.on_invalid_header_callback = pause_on_invalid_header_callback;
+
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+
+  proclen = 0;
+
+  ud.invalid_header_cb_called = 0;
+
+  for (i = 0; i < 4; ++i) {
+    rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos + proclen,
+                                  nghttp2_buf_len(&bufs.head->buf) - proclen);
+    CU_ASSERT_FATAL(rv > 0);
+    proclen += (size_t)rv;
+    CU_ASSERT(nghttp2_nv_equal(&bad_ansnv[i], &ud.nv));
+  }
+
+  CU_ASSERT(0 == ud.invalid_header_cb_called);
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos + proclen,
+                                nghttp2_buf_len(&bufs.head->buf) - proclen);
+
+  CU_ASSERT_FATAL(rv > 0);
+  CU_ASSERT(1 == ud.invalid_header_cb_called);
+  CU_ASSERT(nghttp2_nv_equal(&bad_reqnv[4], &ud.nv));
+
+  proclen += (size_t)rv;
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos + proclen,
+                                nghttp2_buf_len(&bufs.head->buf) - proclen);
+
+  CU_ASSERT(rv > 0);
+  CU_ASSERT(nghttp2_nv_equal(&bad_ansnv[4], &ud.nv));
+
+  nghttp2_session_del(session);
+
+  /* make sure that we can reset stream from
+     on_invalid_header_callback */
+  callbacks.on_header_callback = on_header_callback;
+  callbacks.on_invalid_header_callback = reset_on_invalid_header_callback;
+
+  nghttp2_session_server_new(&session, &callbacks, &ud);
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT(rv == (ssize_t)nghttp2_buf_len(&bufs.head->buf));
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(NGHTTP2_RST_STREAM == item->frame.hd.type);
+  CU_ASSERT(1 == item->frame.hd.stream_id);
+
+  nghttp2_session_del(session);
+  nghttp2_bufs_free(&bufs);
+}
+
+void test_nghttp2_http_ignore_content_length(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_hd_deflater deflater;
+  nghttp2_mem *mem;
+  nghttp2_bufs bufs;
+  ssize_t rv;
+  const nghttp2_nv cl_resnv[] = {MAKE_NV(":status", "304"),
+                                 MAKE_NV("content-length", "20")};
+  const nghttp2_nv conn_reqnv[] = {MAKE_NV(":authority", "localhost"),
+                                   MAKE_NV(":method", "CONNECT"),
+                                   MAKE_NV("content-length", "999999")};
+  const nghttp2_nv conn_cl_resnv[] = {MAKE_NV(":status", "200"),
+                                      MAKE_NV("content-length", "0")};
+  nghttp2_stream *stream;
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  /* If status 304, content-length must be ignored */
+  open_sent_stream2(session, 1, NGHTTP2_STREAM_OPENING);
+
+  rv = pack_headers(&bufs, &deflater, 1,
+                    NGHTTP2_FLAG_END_HEADERS | NGHTTP2_FLAG_END_STREAM,
+                    cl_resnv, ARRLEN(cl_resnv), mem);
+  CU_ASSERT(0 == rv);
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+
+  CU_ASSERT(NULL == nghttp2_session_get_next_ob_item(session));
+
+  nghttp2_bufs_reset(&bufs);
+
+  /* Content-Length in 200 response to CONNECT is ignored */
+  stream = open_sent_stream2(session, 3, NGHTTP2_STREAM_OPENING);
+  stream->http_flags |= NGHTTP2_HTTP_FLAG_METH_CONNECT;
+
+  rv = pack_headers(&bufs, &deflater, 3, NGHTTP2_FLAG_END_HEADERS,
+                    conn_cl_resnv, ARRLEN(conn_cl_resnv), mem);
+  CU_ASSERT(0 == rv);
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+
+  CU_ASSERT(NULL == nghttp2_session_get_next_ob_item(session));
+  CU_ASSERT(-1 == stream->content_length);
+
+  nghttp2_bufs_reset(&bufs);
+
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_session_del(session);
+
+  /* If request method is CONNECT, content-length must be ignored */
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  rv = pack_headers(&bufs, &deflater, 1, NGHTTP2_FLAG_END_HEADERS, conn_reqnv,
+                    ARRLEN(conn_reqnv), mem);
+
+  CU_ASSERT(0 == rv);
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+
+  CU_ASSERT(NULL == nghttp2_session_get_next_ob_item(session));
+
+  stream = nghttp2_session_get_stream(session, 1);
+
+  CU_ASSERT(-1 == stream->content_length);
+  CU_ASSERT((stream->http_flags & NGHTTP2_HTTP_FLAG_METH_CONNECT) > 0);
+
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_session_del(session);
+  nghttp2_bufs_free(&bufs);
+}
+
+void test_nghttp2_http_record_request_method(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  const nghttp2_nv conn_reqnv[] = {MAKE_NV(":method", "CONNECT"),
+                                   MAKE_NV(":authority", "localhost")};
+  const nghttp2_nv conn_resnv[] = {MAKE_NV(":status", "200"),
+                                   MAKE_NV("content-length", "9999")};
+  nghttp2_stream *stream;
+  ssize_t rv;
+  nghttp2_bufs bufs;
+  nghttp2_hd_deflater deflater;
+  nghttp2_mem *mem;
+  nghttp2_outbound_item *item;
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  CU_ASSERT(1 == nghttp2_submit_request(session, NULL, conn_reqnv,
+                                        ARRLEN(conn_reqnv), NULL, NULL));
+
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  stream = nghttp2_session_get_stream(session, 1);
+
+  CU_ASSERT(NGHTTP2_HTTP_FLAG_METH_CONNECT == stream->http_flags);
+
+  rv = pack_headers(&bufs, &deflater, 1, NGHTTP2_FLAG_END_HEADERS, conn_resnv,
+                    ARRLEN(conn_resnv), mem);
+  CU_ASSERT(0 == rv);
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+
+  CU_ASSERT((NGHTTP2_HTTP_FLAG_METH_CONNECT & stream->http_flags) > 0);
+  CU_ASSERT(-1 == stream->content_length);
+
+  /* content-length is ignored in 200 response to a CONNECT request */
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(NULL == item);
+
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_session_del(session);
+  nghttp2_bufs_free(&bufs);
+}
+
+void test_nghttp2_http_push_promise(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_hd_deflater deflater;
+  nghttp2_mem *mem;
+  nghttp2_bufs bufs;
+  ssize_t rv;
+  nghttp2_stream *stream;
+  const nghttp2_nv bad_reqnv[] = {MAKE_NV(":method", "GET")};
+  nghttp2_outbound_item *item;
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  /* good PUSH_PROMISE case */
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  open_sent_stream2(session, 1, NGHTTP2_STREAM_OPENING);
+
+  rv = pack_push_promise(&bufs, &deflater, 1, NGHTTP2_FLAG_END_HEADERS, 2,
+                         reqnv, ARRLEN(reqnv), mem);
+  CU_ASSERT(0 == rv);
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+
+  CU_ASSERT(NULL == nghttp2_session_get_next_ob_item(session));
+
+  stream = nghttp2_session_get_stream(session, 2);
+  CU_ASSERT(NULL != stream);
+
+  nghttp2_bufs_reset(&bufs);
+
+  rv = pack_headers(&bufs, &deflater, 2, NGHTTP2_FLAG_END_HEADERS, resnv,
+                    ARRLEN(resnv), mem);
+
+  CU_ASSERT(0 == rv);
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+
+  CU_ASSERT(NULL == nghttp2_session_get_next_ob_item(session));
+
+  CU_ASSERT(200 == stream->status_code);
+
+  nghttp2_bufs_reset(&bufs);
+
+  /* PUSH_PROMISE lacks mandatory header */
+  rv = pack_push_promise(&bufs, &deflater, 1, NGHTTP2_FLAG_END_HEADERS, 4,
+                         bad_reqnv, ARRLEN(bad_reqnv), mem);
+
+  CU_ASSERT(0 == rv);
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(NGHTTP2_RST_STREAM == item->frame.hd.type);
+  CU_ASSERT(4 == item->frame.hd.stream_id);
+
+  nghttp2_bufs_reset(&bufs);
+
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_session_del(session);
+  nghttp2_bufs_free(&bufs);
+}
+
+void test_nghttp2_http_head_method_upgrade_workaround(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  const nghttp2_nv cl_resnv[] = {MAKE_NV(":status", "200"),
+                                 MAKE_NV("content-length", "1000000007")};
+  nghttp2_bufs bufs;
+  nghttp2_hd_deflater deflater;
+  nghttp2_mem *mem;
+  ssize_t rv;
+  nghttp2_stream *stream;
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  nghttp2_session_client_new(&session, &callbacks, NULL);
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  nghttp2_session_upgrade(session, NULL, 0, NULL);
+
+  rv = pack_headers(&bufs, &deflater, 1, NGHTTP2_FLAG_END_HEADERS, cl_resnv,
+                    ARRLEN(cl_resnv), mem);
+
+  CU_ASSERT(0 == rv);
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+
+  stream = nghttp2_session_get_stream(session, 1);
+
+  CU_ASSERT(-1 == stream->content_length);
+
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_session_del(session);
+  nghttp2_bufs_free(&bufs);
+}
+
+void test_nghttp2_http_no_rfc9113_leading_and_trailing_ws_validation(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  nghttp2_hd_deflater deflater;
+  nghttp2_mem *mem;
+  nghttp2_bufs bufs;
+  ssize_t rv;
+  const nghttp2_nv ws_reqnv[] = {
+      MAKE_NV(":path", "/"),
+      MAKE_NV(":method", "GET"),
+      MAKE_NV(":authority", "localhost"),
+      MAKE_NV(":scheme", "https"),
+      MAKE_NV("foo", "bar "),
+  };
+  nghttp2_outbound_item *item;
+  nghttp2_option *option;
+
+  mem = nghttp2_mem_default();
+  frame_pack_bufs_init(&bufs);
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.send_callback = null_send_callback;
+
+  /* By default, the leading and trailing white spaces validation is
+     enabled as per RFC 9113. */
+  nghttp2_session_server_new(&session, &callbacks, NULL);
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  rv = pack_headers(&bufs, &deflater, 1,
+                    NGHTTP2_FLAG_END_HEADERS | NGHTTP2_FLAG_END_STREAM,
+                    ws_reqnv, ARRLEN(ws_reqnv), mem);
+
+  CU_ASSERT(0 == rv);
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(NGHTTP2_RST_STREAM == item->frame.hd.type);
+  CU_ASSERT(0 == nghttp2_session_send(session));
+
+  nghttp2_bufs_reset(&bufs);
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_session_del(session);
+
+  /* Turn off the validation */
+  nghttp2_option_new(&option);
+  nghttp2_option_set_no_rfc9113_leading_and_trailing_ws_validation(option, 1);
+
+  nghttp2_session_server_new2(&session, &callbacks, NULL, option);
+
+  nghttp2_hd_deflate_init(&deflater, mem);
+
+  rv = pack_headers(&bufs, &deflater, 1,
+                    NGHTTP2_FLAG_END_HEADERS | NGHTTP2_FLAG_END_STREAM,
+                    ws_reqnv, ARRLEN(ws_reqnv), mem);
+
+  CU_ASSERT(0 == rv);
+
+  rv = nghttp2_session_mem_recv(session, bufs.head->buf.pos,
+                                nghttp2_buf_len(&bufs.head->buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&bufs.head->buf) == rv);
+
+  item = nghttp2_session_get_next_ob_item(session);
+
+  CU_ASSERT(NULL == item);
+
+  nghttp2_bufs_reset(&bufs);
+  nghttp2_hd_deflate_free(&deflater);
+  nghttp2_session_del(session);
+  nghttp2_option_del(option);
+
+  nghttp2_bufs_free(&bufs);
+}