Adding upstream version 2.1.30.upstream/2.1.30

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

10 files changed, 5270 insertions, 0 deletions

diff --git a/tests/utests/basic/test_common.c b/tests/utests/basic/test_common.c
new file mode 100644
index 0000000..75235a2
--- /dev/null
+++ b/tests/utests/basic/test_common.c
@@ -0,0 +1,416 @@
+/*
+ * @file test_common.c
+ * @author: Radek Krejci <rkrejci@cesnet.cz>
+ * @brief unit tests for functions from common.c
+ *
+ * Copyright (c) 2018 CESNET, z.s.p.o.
+ *
+ * This source code is licensed under BSD 3-Clause License (the "License").
+ * You may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://opensource.org/licenses/BSD-3-Clause
+ */
+#define _UTEST_MAIN_
+#include "utests.h"
+
+#include "common.h"
+
+static void
+test_utf8(void **UNUSED(state))
+{
+    char buf[5] = {0};
+    const char *str = buf;
+    unsigned int c;
+    size_t len;
+
+    /* test invalid UTF-8 characters in lyxml_getutf8
+     * - https://en.wikipedia.org/wiki/UTF-8 */
+    buf[0] = (char)0x04;
+    assert_int_equal(LY_EINVAL, ly_getutf8(&str, &c, &len));
+    buf[0] = (char)0x80;
+    assert_int_equal(LY_EINVAL, ly_getutf8(&str, &c, &len));
+
+    buf[0] = (char)0xc0;
+    buf[1] = (char)0x00;
+    assert_int_equal(LY_EINVAL, ly_getutf8(&str, &c, &len));
+    buf[1] = (char)0x80;
+    assert_int_equal(LY_EINVAL, ly_getutf8(&str, &c, &len));
+
+    buf[0] = (char)0xe0;
+    buf[1] = (char)0x00;
+    buf[2] = (char)0x80;
+    assert_int_equal(LY_EINVAL, ly_getutf8(&str, &c, &len));
+    buf[1] = (char)0x80;
+    assert_int_equal(LY_EINVAL, ly_getutf8(&str, &c, &len));
+
+    buf[0] = (char)0xf0;
+    buf[1] = (char)0x00;
+    buf[2] = (char)0x80;
+    buf[3] = (char)0x80;
+    assert_int_equal(LY_EINVAL, ly_getutf8(&str, &c, &len));
+    buf[1] = (char)0x80;
+    assert_int_equal(LY_EINVAL, ly_getutf8(&str, &c, &len));
+}
+
+static void
+test_parse_int(void **UNUSED(state))
+{
+    const char *str;
+    int64_t i = 500;
+
+    str = "10";
+    assert_int_equal(LY_SUCCESS, ly_parse_int(str, strlen(str), -10, 10, 10, &i));
+    assert_int_equal(i, 10);
+
+    /* leading zeros are allowed, trailing whitespaces are allowed */
+    str = "000\n\t  ";
+    assert_int_equal(LY_SUCCESS, ly_parse_int(str, strlen(str), -10, 10, 10, &i));
+    assert_int_equal(i, 0);
+
+    /* negative value */
+    str = "-10";
+    assert_int_equal(LY_SUCCESS, ly_parse_int(str, strlen(str), -10, 10, 10, &i));
+    assert_int_equal(i, -10);
+
+    /* non-NULL terminated string */
+    str = "+5sometext";
+    assert_int_equal(LY_SUCCESS, ly_parse_int(str, 2, -10, 10, 10, &i));
+    assert_int_equal(i, 5);
+
+    /* out of bounds value */
+    str = "11";
+    assert_int_equal(LY_EDENIED, ly_parse_int(str, strlen(str), -10, 10, 10, &i));
+    str = "-11";
+    assert_int_equal(LY_EDENIED, ly_parse_int(str, strlen(str), -10, 10, 10, &i));
+
+    /* NaN */
+    str = "zero";
+    assert_int_equal(LY_EVALID, ly_parse_int(str, strlen(str), -10, 10, 10, &i));
+
+    /* mixing number with text */
+    str = "10zero";
+    assert_int_equal(LY_EVALID, ly_parse_int(str, strlen(str), -10, 10, 10, &i));
+
+    str = "10  zero";
+    assert_int_equal(LY_EVALID, ly_parse_int(str, strlen(str), -10, 10, 10, &i));
+}
+
+static void
+test_parse_uint(void **UNUSED(state))
+{
+    const char *str;
+    uint64_t u = 500;
+
+    str = "10";
+    assert_int_equal(LY_SUCCESS, ly_parse_uint(str, strlen(str), 10, 10, &u));
+    assert_int_equal(u, 10);
+
+    /* leading zeros are allowed, trailing whitespaces are allowed */
+    str = "000\n\t  ";
+    assert_int_equal(LY_SUCCESS, ly_parse_uint(str, strlen(str), 10, 10, &u));
+    assert_int_equal(u, 0);
+    /* non-NULL terminated string */
+    str = "+5sometext";
+    assert_int_equal(LY_SUCCESS, ly_parse_uint(str, 2, 10, 10, &u));
+    assert_int_equal(u, 5);
+
+    /* out of bounds value */
+    str = "11";
+    assert_int_equal(LY_EDENIED, ly_parse_uint(str, strlen(str), 10, 10, &u));
+    str = "-1";
+    assert_int_equal(LY_EDENIED, ly_parse_uint(str, strlen(str), (uint64_t)-1, 10, &u));
+
+    /* NaN */
+    str = "zero";
+    assert_int_equal(LY_EVALID, ly_parse_uint(str, strlen(str), 10, 10, &u));
+
+    /* mixing number with text */
+    str = "10zero";
+    assert_int_equal(LY_EVALID, ly_parse_uint(str, strlen(str), 10, 10, &u));
+
+    str = "10  zero";
+    assert_int_equal(LY_EVALID, ly_parse_uint(str, strlen(str), 10, 10, &u));
+}
+
+static void
+test_parse_nodeid(void **UNUSED(state))
+{
+    const char *str;
+    const char *prefix, *name;
+    size_t prefix_len, name_len;
+
+    str = "123";
+    assert_int_equal(LY_EINVAL, ly_parse_nodeid(&str, &prefix, &prefix_len, &name, &name_len));
+
+    str = "a12_-.!";
+    assert_int_equal(LY_SUCCESS, ly_parse_nodeid(&str, &prefix, &prefix_len, &name, &name_len));
+    assert_null(prefix);
+    assert_int_equal(0, prefix_len);
+    assert_non_null(name);
+    assert_int_equal(6, name_len);
+    assert_int_equal(0, strncmp("a12_-.", name, name_len));
+    assert_string_equal("!", str);
+
+    str = "a12_-.:_b2 xxx";
+    assert_int_equal(LY_SUCCESS, ly_parse_nodeid(&str, &prefix, &prefix_len, &name, &name_len));
+    assert_non_null(prefix);
+    assert_int_equal(6, prefix_len);
+    assert_int_equal(0, strncmp("a12_-.", prefix, prefix_len));
+    assert_non_null(name);
+    assert_int_equal(3, name_len);
+    assert_int_equal(0, strncmp("_b2", name, name_len));
+    assert_string_equal(" xxx", str);
+}
+
+static void
+test_parse_instance_predicate(void **UNUSED(state))
+{
+    const char *str, *errmsg;
+    const char *prefix, *id, *value;
+    size_t prefix_len, id_len, value_len;
+
+    str = "[ex:name='fred']";
+    assert_int_equal(LY_SUCCESS, ly_parse_instance_predicate(&str, strlen(str), LYD_XML, &prefix, &prefix_len, &id, &id_len, &value, &value_len, &errmsg));
+    assert_string_equal(str, "");
+    assert_string_equal(prefix, "ex:name='fred']");
+    assert_int_equal(prefix_len, 2);
+    assert_string_equal(id, "name='fred']");
+    assert_int_equal(id_len, 4);
+    assert_string_equal(value, "fred']");
+    assert_int_equal(value_len, 4);
+
+    str = "[ex:ip = \"[192.0.2.1]\"][ex:port='80']";
+    assert_int_equal(LY_SUCCESS, ly_parse_instance_predicate(&str, strlen(str), LYD_XML, &prefix, &prefix_len, &id, &id_len, &value, &value_len, &errmsg));
+    assert_string_equal(str, "[ex:port='80']");
+    assert_string_equal(prefix, "ex:ip = \"[192.0.2.1]\"][ex:port='80']");
+    assert_int_equal(prefix_len, 2);
+    assert_string_equal(id, "ip = \"[192.0.2.1]\"][ex:port='80']");
+    assert_int_equal(id_len, 2);
+    assert_string_equal(value, "[192.0.2.1]\"][ex:port='80']");
+    assert_int_equal(value_len, 11);
+
+    str = "[. = 'blowfish-cbc']";
+    assert_int_equal(LY_SUCCESS, ly_parse_instance_predicate(&str, strlen(str), LYD_XML, &prefix, &prefix_len, &id, &id_len, &value, &value_len, &errmsg));
+    assert_string_equal(str, "");
+    assert_null(prefix);
+    assert_int_equal(prefix_len, 0);
+    assert_string_equal(id, ". = 'blowfish-cbc']");
+    assert_int_equal(id_len, 1);
+    assert_string_equal(value, "blowfish-cbc']");
+    assert_int_equal(value_len, 12);
+
+    str = "[ 3 ]";
+    assert_int_equal(LY_SUCCESS, ly_parse_instance_predicate(&str, strlen(str), LYD_XML, &prefix, &prefix_len, &id, &id_len, &value, &value_len, &errmsg));
+    assert_string_equal(str, "");
+    assert_null(prefix);
+    assert_int_equal(prefix_len, 0);
+    assert_null(id);
+    assert_int_equal(id_len, 0);
+    assert_string_equal(value, "3 ]");
+    assert_int_equal(value_len, 1);
+
+    /* invalid predicates */
+    /* position must be positive integer */
+    str = "[0]";
+    assert_int_equal(LY_EVALID, ly_parse_instance_predicate(&str, strlen(str), LYD_XML, &prefix, &prefix_len, &id, &id_len, &value, &value_len, &errmsg));
+    assert_string_equal(errmsg, "The position predicate cannot be zero.");
+    str = "[-1]";
+    assert_int_equal(LY_EVALID, ly_parse_instance_predicate(&str, strlen(str), LYD_XML, &prefix, &prefix_len, &id, &id_len, &value, &value_len, &errmsg));
+    assert_string_equal(errmsg, "Invalid instance predicate format (negative position or invalid node-identifier).");
+
+    /* invalid node-identifier */
+    str = "[$node='value']";
+    assert_int_equal(LY_EVALID, ly_parse_instance_predicate(&str, strlen(str), LYD_XML, &prefix, &prefix_len, &id, &id_len, &value, &value_len, &errmsg));
+    assert_string_equal(errmsg, "Invalid node-identifier.");
+    str = "[.node='value']";
+    assert_int_equal(LY_EVALID, ly_parse_instance_predicate(&str, strlen(str), LYD_XML, &prefix, &prefix_len, &id, &id_len, &value, &value_len, &errmsg));
+    assert_string_equal(errmsg, "Unexpected character instead of '=' in leaf-list-predicate.");
+    str = "[13node='value']";
+    assert_int_equal(LY_EVALID, ly_parse_instance_predicate(&str, strlen(str), LYD_XML, &prefix, &prefix_len, &id, &id_len, &value, &value_len, &errmsg));
+    assert_string_equal(errmsg, "Predicate (pos) is not terminated by \']\' character.");
+
+    str = "[ex:node]";
+    assert_int_equal(LY_EVALID, ly_parse_instance_predicate(&str, strlen(str), LYD_XML, &prefix, &prefix_len, &id, &id_len, &value, &value_len, &errmsg));
+    assert_string_equal(errmsg, "Unexpected character instead of '=' in key-predicate.");
+
+    str = "[ex:node=  value]";
+    assert_int_equal(LY_EVALID, ly_parse_instance_predicate(&str, strlen(str), LYD_XML, &prefix, &prefix_len, &id, &id_len, &value, &value_len, &errmsg));
+    assert_string_equal(errmsg, "String value is not quoted.");
+
+    str = "[ex:node='value\"]";
+    assert_int_equal(LY_EVALID, ly_parse_instance_predicate(&str, strlen(str), LYD_XML, &prefix, &prefix_len, &id, &id_len, &value, &value_len, &errmsg));
+    assert_string_equal(errmsg, "Value is not terminated quoted-string.");
+
+    str = "[ex:node='value  ]";
+    assert_int_equal(LY_EVALID, ly_parse_instance_predicate(&str, strlen(str), LYD_XML, &prefix, &prefix_len, &id, &id_len, &value, &value_len, &errmsg));
+    assert_string_equal(errmsg, "Value is not terminated quoted-string.");
+
+    str = "[ex:node=\"value\"[3]";
+    assert_int_equal(LY_EVALID, ly_parse_instance_predicate(&str, strlen(str), LYD_XML, &prefix, &prefix_len, &id, &id_len, &value, &value_len, &errmsg));
+    assert_string_equal(errmsg, "Predicate (key-predicate) is not terminated by \']\' character.");
+    str = "[.=\"value\"[3]";
+    assert_int_equal(LY_EVALID, ly_parse_instance_predicate(&str, strlen(str), LYD_XML, &prefix, &prefix_len, &id, &id_len, &value, &value_len, &errmsg));
+    assert_string_equal(errmsg, "Predicate (leaf-list-predicate) is not terminated by \']\' character.");
+
+    /* the limit of the string is too short, it ends one character earlier */
+    str = "[ex:node='value']";
+    assert_int_equal(LY_EINVAL, ly_parse_instance_predicate(&str, strlen(str) - 1, LYD_XML, &prefix, &prefix_len, &id, &id_len, &value, &value_len, &errmsg));
+    assert_string_equal(errmsg, "Predicate is incomplete.");
+}
+
+static void
+test_value_prefix_next(void **UNUSED(state))
+{
+    const char *next;
+    ly_bool is_prefix;
+    uint32_t bytes;
+
+    assert_int_equal(LY_SUCCESS, ly_value_prefix_next(NULL, NULL, &bytes, &is_prefix, &next));
+    assert_int_equal(0, bytes);
+    assert_int_equal(LY_SUCCESS, ly_value_prefix_next("", NULL, &bytes, &is_prefix, &next));
+    assert_int_equal(0, bytes);
+
+    /* prefix */
+    next = "pref:";
+    assert_int_equal(LY_SUCCESS, ly_value_prefix_next(next, NULL, &bytes, &is_prefix, &next));
+    assert_int_equal(4, bytes);
+    assert_null(next);
+    assert_int_equal(1, is_prefix);
+
+    /* no-prefix */
+    next = "node";
+    assert_int_equal(LY_SUCCESS, ly_value_prefix_next(next, NULL, &bytes, &is_prefix, &next));
+    assert_int_equal(4, bytes);
+    assert_null(next);
+    assert_int_equal(0, is_prefix);
+
+    /* no-prefix */
+    next = "::::";
+    assert_int_equal(LY_SUCCESS, ly_value_prefix_next(next, NULL, &bytes, &is_prefix, &next));
+    assert_int_equal(4, bytes);
+    assert_null(next);
+    assert_int_equal(0, is_prefix);
+
+    /* no-prefix */
+    next = "//a/:";
+    assert_int_equal(LY_SUCCESS, ly_value_prefix_next(next, NULL, &bytes, &is_prefix, &next));
+    assert_int_equal(5, bytes);
+    assert_null(next);
+    assert_int_equal(0, is_prefix);
+
+    /* no-prefix */
+    next = "//a//";
+    assert_int_equal(LY_SUCCESS, ly_value_prefix_next(next, NULL, &bytes, &is_prefix, &next));
+    assert_int_equal(5, bytes);
+    assert_null(next);
+    assert_int_equal(0, is_prefix);
+
+    /* prefix, prefix */
+    next = "pref1:pref2:";
+    assert_int_equal(LY_SUCCESS, ly_value_prefix_next(next, NULL, &bytes, &is_prefix, &next));
+    assert_int_equal(5, bytes);
+    assert_string_equal(next, "pref2:");
+    assert_int_equal(1, is_prefix);
+    assert_int_equal(LY_SUCCESS, ly_value_prefix_next(next, NULL, &bytes, &is_prefix, &next));
+    assert_int_equal(5, bytes);
+    assert_null(next);
+    assert_int_equal(1, is_prefix);
+
+    /* prefix, no-prefix */
+    next = "pref:node";
+    assert_int_equal(LY_SUCCESS, ly_value_prefix_next(next, NULL, &bytes, &is_prefix, &next));
+    assert_int_equal(4, bytes);
+    assert_string_equal(next, "node");
+    assert_int_equal(1, is_prefix);
+    assert_int_equal(LY_SUCCESS, ly_value_prefix_next(next, NULL, &bytes, &is_prefix, &next));
+    assert_int_equal(4, bytes);
+    assert_null(next);
+    assert_int_equal(0, is_prefix);
+
+    /* no-prefix, prefix */
+    next = "/pref:";
+    assert_int_equal(LY_SUCCESS, ly_value_prefix_next(next, NULL, &bytes, &is_prefix, &next));
+    assert_int_equal(1, bytes);
+    assert_string_equal(next, "pref:");
+    assert_int_equal(0, is_prefix);
+    assert_int_equal(LY_SUCCESS, ly_value_prefix_next(next, NULL, &bytes, &is_prefix, &next));
+    assert_int_equal(4, bytes);
+    assert_null(next);
+    assert_int_equal(1, is_prefix);
+
+    /* no-prefix, prefix */
+    next = "//pref:";
+    assert_int_equal(LY_SUCCESS, ly_value_prefix_next(next, NULL, &bytes, &is_prefix, &next));
+    assert_int_equal(2, bytes);
+    assert_string_equal(next, "pref:");
+    assert_int_equal(0, is_prefix);
+    assert_int_equal(LY_SUCCESS, ly_value_prefix_next(next, NULL, &bytes, &is_prefix, &next));
+    assert_int_equal(4, bytes);
+    assert_null(next);
+    assert_int_equal(1, is_prefix);
+
+    /* no-prefix, prefix, no-prefix */
+    next = "/pref:node";
+    assert_int_equal(LY_SUCCESS, ly_value_prefix_next(next, NULL, &bytes, &is_prefix, &next));
+    assert_int_equal(1, bytes);
+    assert_string_equal(next, "pref:node");
+    assert_int_equal(0, is_prefix);
+    assert_int_equal(LY_SUCCESS, ly_value_prefix_next(next, NULL, &bytes, &is_prefix, &next));
+    assert_int_equal(4, bytes);
+    assert_string_equal(next, "node");
+    assert_int_equal(1, is_prefix);
+    assert_int_equal(LY_SUCCESS, ly_value_prefix_next(next, NULL, &bytes, &is_prefix, &next));
+    assert_int_equal(4, bytes);
+    assert_null(next);
+    assert_int_equal(0, is_prefix);
+
+    /* prefix, no-prefix, prefix */
+    next = "pref:node pref:";
+    assert_int_equal(LY_SUCCESS, ly_value_prefix_next(next, NULL, &bytes, &is_prefix, &next));
+    assert_int_equal(4, bytes);
+    assert_string_equal(next, "node pref:");
+    assert_int_equal(1, is_prefix);
+    assert_int_equal(LY_SUCCESS, ly_value_prefix_next(next, NULL, &bytes, &is_prefix, &next));
+    assert_int_equal(5, bytes);
+    assert_string_equal(next, "pref:");
+    assert_int_equal(0, is_prefix);
+    assert_int_equal(LY_SUCCESS, ly_value_prefix_next(next, NULL, &bytes, &is_prefix, &next));
+    assert_int_equal(4, bytes);
+    assert_null(next);
+    assert_int_equal(1, is_prefix);
+
+    /* prefix, no-prefix, prefix, no-prefix */
+    next = "pref:node /pref:node";
+    assert_int_equal(LY_SUCCESS, ly_value_prefix_next(next, NULL, &bytes, &is_prefix, &next));
+    assert_int_equal(4, bytes);
+    assert_string_equal(next, "node /pref:node");
+    assert_int_equal(1, is_prefix);
+    assert_int_equal(LY_SUCCESS, ly_value_prefix_next(next, NULL, &bytes, &is_prefix, &next));
+    assert_int_equal(6, bytes);
+    assert_string_equal(next, "pref:node");
+    assert_int_equal(0, is_prefix);
+    assert_int_equal(LY_SUCCESS, ly_value_prefix_next(next, NULL, &bytes, &is_prefix, &next));
+    assert_int_equal(4, bytes);
+    assert_string_equal(next, "node");
+    assert_int_equal(1, is_prefix);
+    assert_int_equal(LY_SUCCESS, ly_value_prefix_next(next, NULL, &bytes, &is_prefix, &next));
+    assert_int_equal(4, bytes);
+    assert_null(next);
+    assert_int_equal(0, is_prefix);
+}
+
+int
+main(void)
+{
+    const struct CMUnitTest tests[] = {
+        UTEST(test_utf8),
+        UTEST(test_parse_int),
+        UTEST(test_parse_uint),
+        UTEST(test_parse_nodeid),
+        UTEST(test_parse_instance_predicate),
+        UTEST(test_value_prefix_next),
+    };
+
+    return cmocka_run_group_tests(tests, NULL, NULL);
+}
diff --git a/tests/utests/basic/test_context.c b/tests/utests/basic/test_context.c
new file mode 100644
index 0000000..4c4cc3f
--- /dev/null
+++ b/tests/utests/basic/test_context.c
@@ -0,0 +1,1087 @@
+/*
+ * @file test_context.c
+ * @author: Radek Krejci <rkrejci@cesnet.cz>
+ * @brief unit tests for functions from context.c
+ *
+ * Copyright (c) 2018 CESNET, z.s.p.o.
+ *
+ * This source code is licensed under BSD 3-Clause License (the "License").
+ * You may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://opensource.org/licenses/BSD-3-Clause
+ */
+#define _UTEST_MAIN_
+#include "utests.h"
+
+#include "common.h"
+#include "context.h"
+#include "in.h"
+#include "schema_compile.h"
+#include "tests_config.h"
+#include "tree_schema_internal.h"
+#ifdef _WIN32
+static void
+slashes_to_backslashes(char *path)
+{
+    while ((path = strchr(path, '/'))) {
+        *path++ = '\\';
+    }
+}
+
+static void
+test_searchdirs(void **state)
+{
+    const char * const *list;
+    char *path1 = strdup(TESTS_BIN "/utests");
+    char *path2 = strdup(TESTS_SRC);
+
+    slashes_to_backslashes(path1);
+    slashes_to_backslashes(path2);
+
+    assert_int_equal(LY_EINVAL, ly_ctx_set_searchdir(NULL, NULL));
+    CHECK_LOG("Invalid argument ctx (ly_ctx_set_searchdir()).", NULL);
+    assert_null(ly_ctx_get_searchdirs(NULL));
+    CHECK_LOG("Invalid argument ctx (ly_ctx_get_searchdirs()).", NULL);
+    assert_int_equal(LY_EINVAL, ly_ctx_unset_searchdir(NULL, NULL));
+    CHECK_LOG("Invalid argument ctx (ly_ctx_unset_searchdir()).", NULL);
+
+    /* correct path */
+    assert_int_equal(LY_SUCCESS, ly_ctx_set_searchdir(UTEST_LYCTX, path1));
+    assert_int_equal(1, UTEST_LYCTX->search_paths.count);
+    assert_string_equal(path1, UTEST_LYCTX->search_paths.objs[0]);
+
+    /* duplicated paths */
+    assert_int_equal(LY_EEXIST, ly_ctx_set_searchdir(UTEST_LYCTX, path1));
+    assert_int_equal(1, UTEST_LYCTX->search_paths.count);
+    assert_string_equal(path1, UTEST_LYCTX->search_paths.objs[0]);
+
+    /* another path */
+    assert_int_equal(LY_SUCCESS, ly_ctx_set_searchdir(UTEST_LYCTX, path2));
+    assert_int_equal(2, UTEST_LYCTX->search_paths.count);
+    assert_string_equal(path2, UTEST_LYCTX->search_paths.objs[1]);
+
+    /* get searchpaths */
+    list = ly_ctx_get_searchdirs(UTEST_LYCTX);
+    assert_non_null(list);
+    assert_string_equal(path1, list[0]);
+    assert_string_equal(path2, list[1]);
+    assert_null(list[2]);
+
+    /* removing searchpaths */
+    /* nonexisting */
+    assert_int_equal(LY_EINVAL, ly_ctx_unset_searchdir(UTEST_LYCTX, "/nonexistingfile"));
+    CHECK_LOG_CTX("Invalid argument value (ly_ctx_unset_searchdir()).", NULL);
+
+    /* first */
+    assert_int_equal(LY_SUCCESS, ly_ctx_unset_searchdir(UTEST_LYCTX, path1));
+    assert_int_equal(1, UTEST_LYCTX->search_paths.count);
+    assert_string_not_equal(path1, list[0]);
+
+    /* second */
+    assert_int_equal(LY_SUCCESS, ly_ctx_unset_searchdir(UTEST_LYCTX, path2));
+    assert_int_equal(0, UTEST_LYCTX->search_paths.count);
+
+    free(path1);
+    free(path2);
+}
+
+#else
+
+static void
+test_searchdirs(void **state)
+{
+    const char * const *list;
+
+    /* invalid arguments */
+    assert_int_equal(LY_EINVAL, ly_ctx_set_searchdir(NULL, NULL));
+    CHECK_LOG("Invalid argument ctx (ly_ctx_set_searchdir()).", NULL);
+    assert_null(ly_ctx_get_searchdirs(NULL));
+    CHECK_LOG("Invalid argument ctx (ly_ctx_get_searchdirs()).", NULL);
+    assert_int_equal(LY_EINVAL, ly_ctx_unset_searchdir(NULL, NULL));
+    CHECK_LOG("Invalid argument ctx (ly_ctx_unset_searchdir()).", NULL);
+
+    /* readable and executable, but not a directory */
+    assert_int_equal(LY_EINVAL, ly_ctx_set_searchdir(UTEST_LYCTX, TESTS_BIN "/utest_context"));
+    CHECK_LOG_CTX("Given search directory \""TESTS_BIN "/utest_context\" is not a directory.", NULL);
+    /* not existing */
+    assert_int_equal(LY_EINVAL, ly_ctx_set_searchdir(UTEST_LYCTX, "/nonexistingfile"));
+    CHECK_LOG_CTX("Unable to use search directory \"/nonexistingfile\" (No such file or directory).", NULL);
+
+    /* ly_set_add() fails */
+    /* no change */
+    assert_int_equal(LY_SUCCESS, ly_ctx_set_searchdir(UTEST_LYCTX, NULL));
+
+    /* correct path */
+    assert_int_equal(LY_SUCCESS, ly_ctx_set_searchdir(UTEST_LYCTX, TESTS_BIN "/utests"));
+    assert_int_equal(1, UTEST_LYCTX->search_paths.count);
+    assert_string_equal(TESTS_BIN "/utests", UTEST_LYCTX->search_paths.objs[0]);
+
+    /* duplicated paths */
+    assert_int_equal(LY_EEXIST, ly_ctx_set_searchdir(UTEST_LYCTX, TESTS_BIN "/utests"));
+    assert_int_equal(1, UTEST_LYCTX->search_paths.count);
+    assert_string_equal(TESTS_BIN "/utests", UTEST_LYCTX->search_paths.objs[0]);
+
+    /* another paths - add 8 to fill the initial buffer of the searchpaths list */
+    assert_int_equal(LY_SUCCESS, ly_ctx_set_searchdir(UTEST_LYCTX, TESTS_BIN "/CMakeFiles"));
+    assert_int_equal(LY_SUCCESS, ly_ctx_set_searchdir(UTEST_LYCTX, TESTS_SRC "/../src"));
+    assert_int_equal(LY_SUCCESS, ly_ctx_set_searchdir(UTEST_LYCTX, TESTS_SRC "/../CMakeModules"));
+    assert_int_equal(LY_SUCCESS, ly_ctx_set_searchdir(UTEST_LYCTX, TESTS_SRC "/../doc"));
+    assert_int_equal(LY_SUCCESS, ly_ctx_set_searchdir(UTEST_LYCTX, TESTS_SRC));
+    assert_int_equal(LY_SUCCESS, ly_ctx_set_searchdir(UTEST_LYCTX, TESTS_BIN));
+    assert_int_equal(7, UTEST_LYCTX->search_paths.count);
+
+    /* get searchpaths */
+    list = ly_ctx_get_searchdirs(UTEST_LYCTX);
+    assert_non_null(list);
+    assert_string_equal(TESTS_BIN "/utests", list[0]);
+    assert_string_equal(TESTS_BIN "/CMakeFiles", list[1]);
+    assert_string_equal(TESTS_SRC, list[5]);
+    assert_string_equal(TESTS_BIN, list[6]);
+    assert_null(list[7]);
+
+    /* removing searchpaths */
+    /* nonexisting */
+    assert_int_equal(LY_EINVAL, ly_ctx_unset_searchdir(UTEST_LYCTX, "/nonexistingfile"));
+    CHECK_LOG_CTX("Invalid argument value (ly_ctx_unset_searchdir()).", NULL);
+    /* first */
+    assert_int_equal(LY_SUCCESS, ly_ctx_unset_searchdir(UTEST_LYCTX, TESTS_BIN "/utests"));
+    assert_string_not_equal(TESTS_BIN "/utests", list[0]);
+    assert_int_equal(6, UTEST_LYCTX->search_paths.count);
+    /* middle */
+    assert_int_equal(LY_SUCCESS, ly_ctx_unset_searchdir(UTEST_LYCTX, TESTS_SRC));
+    assert_int_equal(5, UTEST_LYCTX->search_paths.count);
+    /* last */
+    assert_int_equal(LY_SUCCESS, ly_ctx_unset_searchdir(UTEST_LYCTX, TESTS_BIN));
+    assert_int_equal(4, UTEST_LYCTX->search_paths.count);
+    /* all */
+    assert_int_equal(LY_SUCCESS, ly_ctx_unset_searchdir(UTEST_LYCTX, NULL));
+    assert_int_equal(0, UTEST_LYCTX->search_paths.count);
+
+    /* again - no change */
+    assert_int_equal(LY_SUCCESS, ly_ctx_unset_searchdir(UTEST_LYCTX, NULL));
+
+    /* cleanup */
+    ly_ctx_destroy(UTEST_LYCTX);
+
+    /* test searchdir list in ly_ctx_new() */
+    assert_int_equal(LY_EINVAL, ly_ctx_new("/nonexistingfile", 0, &UTEST_LYCTX));
+    CHECK_LOG("Unable to use search directory \"/nonexistingfile\" (No such file or directory).", NULL);
+    assert_int_equal(LY_SUCCESS,
+            ly_ctx_new(TESTS_SRC PATH_SEPARATOR TESTS_BIN PATH_SEPARATOR TESTS_BIN PATH_SEPARATOR TESTS_SRC,
+            LY_CTX_DISABLE_SEARCHDIRS, &UTEST_LYCTX));
+    assert_int_equal(2, UTEST_LYCTX->search_paths.count);
+    assert_string_equal(TESTS_SRC, UTEST_LYCTX->search_paths.objs[0]);
+    assert_string_equal(TESTS_BIN, UTEST_LYCTX->search_paths.objs[1]);
+}
+
+#endif
+
+static void
+test_options(void **state)
+{
+    /* use own context with extra flags */
+    ly_ctx_destroy(UTEST_LYCTX);
+
+    assert_int_equal(LY_SUCCESS, ly_ctx_new(NULL, 0xffff, &UTEST_LYCTX));
+
+    /* invalid arguments */
+    assert_int_equal(0, ly_ctx_get_options(NULL));
+    CHECK_LOG("Invalid argument ctx (ly_ctx_get_options()).", NULL);
+
+    assert_int_equal(LY_EINVAL, ly_ctx_set_options(NULL, 0));
+    CHECK_LOG("Invalid argument ctx (ly_ctx_set_options()).", NULL);
+    assert_int_equal(LY_EINVAL, ly_ctx_unset_options(NULL, 0));
+    CHECK_LOG("Invalid argument ctx (ly_ctx_unset_options()).", NULL);
+
+    /* unset */
+    /* LY_CTX_ALL_IMPLEMENTED */
+    assert_int_not_equal(0, UTEST_LYCTX->flags & LY_CTX_ALL_IMPLEMENTED);
+    assert_int_equal(LY_SUCCESS, ly_ctx_unset_options(UTEST_LYCTX, LY_CTX_ALL_IMPLEMENTED));
+    assert_int_equal(0, UTEST_LYCTX->flags & LY_CTX_ALL_IMPLEMENTED);
+
+    /* LY_CTX_REF_IMPLEMENTED */
+    assert_int_not_equal(0, UTEST_LYCTX->flags & LY_CTX_REF_IMPLEMENTED);
+    assert_int_equal(LY_SUCCESS, ly_ctx_unset_options(UTEST_LYCTX, LY_CTX_REF_IMPLEMENTED));
+    assert_int_equal(0, UTEST_LYCTX->flags & LY_CTX_REF_IMPLEMENTED);
+
+    /* LY_CTX_DISABLE_SEARCHDIRS */
+    assert_int_not_equal(0, UTEST_LYCTX->flags & LY_CTX_DISABLE_SEARCHDIRS);
+    assert_int_equal(LY_SUCCESS, ly_ctx_unset_options(UTEST_LYCTX, LY_CTX_DISABLE_SEARCHDIRS));
+    assert_int_equal(0, UTEST_LYCTX->flags & LY_CTX_DISABLE_SEARCHDIRS);
+
+    /* LY_CTX_DISABLE_SEARCHDIR_CWD */
+    assert_int_not_equal(0, UTEST_LYCTX->flags & LY_CTX_DISABLE_SEARCHDIR_CWD);
+    assert_int_equal(LY_SUCCESS, ly_ctx_unset_options(UTEST_LYCTX, LY_CTX_DISABLE_SEARCHDIR_CWD));
+    assert_int_equal(0, UTEST_LYCTX->flags & LY_CTX_DISABLE_SEARCHDIR_CWD);
+
+    /* LY_CTX_PREFER_SEARCHDIRS */
+    assert_int_not_equal(0, UTEST_LYCTX->flags & LY_CTX_PREFER_SEARCHDIRS);
+    assert_int_equal(LY_SUCCESS, ly_ctx_unset_options(UTEST_LYCTX, LY_CTX_PREFER_SEARCHDIRS));
+    assert_int_equal(0, UTEST_LYCTX->flags & LY_CTX_PREFER_SEARCHDIRS);
+
+    assert_int_equal(UTEST_LYCTX->flags, ly_ctx_get_options(UTEST_LYCTX));
+
+    /* set back */
+    /* LY_CTX_ALL_IMPLEMENTED */
+    assert_int_equal(LY_SUCCESS, ly_ctx_set_options(UTEST_LYCTX, LY_CTX_ALL_IMPLEMENTED));
+    assert_int_not_equal(0, UTEST_LYCTX->flags & LY_CTX_ALL_IMPLEMENTED);
+
+    /* LY_CTX_REF_IMPLEMENTED */
+    assert_int_equal(LY_SUCCESS, ly_ctx_set_options(UTEST_LYCTX, LY_CTX_REF_IMPLEMENTED));
+    assert_int_not_equal(0, UTEST_LYCTX->flags & LY_CTX_REF_IMPLEMENTED);
+
+    /* LY_CTX_DISABLE_SEARCHDIRS */
+    assert_int_equal(LY_SUCCESS, ly_ctx_set_options(UTEST_LYCTX, LY_CTX_DISABLE_SEARCHDIRS));
+    assert_int_not_equal(0, UTEST_LYCTX->flags & LY_CTX_DISABLE_SEARCHDIRS);
+
+    /* LY_CTX_DISABLE_SEARCHDIR_CWD */
+    assert_int_equal(LY_SUCCESS, ly_ctx_set_options(UTEST_LYCTX, LY_CTX_DISABLE_SEARCHDIR_CWD));
+    assert_int_not_equal(0, UTEST_LYCTX->flags & LY_CTX_DISABLE_SEARCHDIR_CWD);
+
+    /* LY_CTX_PREFER_SEARCHDIRS */
+    assert_int_equal(LY_SUCCESS, ly_ctx_set_options(UTEST_LYCTX, LY_CTX_PREFER_SEARCHDIRS));
+    assert_int_not_equal(0, UTEST_LYCTX->flags & LY_CTX_PREFER_SEARCHDIRS);
+
+    assert_int_equal(UTEST_LYCTX->flags, ly_ctx_get_options(UTEST_LYCTX));
+}
+
+static LY_ERR
+test_imp_clb(const char *UNUSED(mod_name), const char *UNUSED(mod_rev), const char *UNUSED(submod_name),
+        const char *UNUSED(sub_rev), void *user_data, LYS_INFORMAT *format,
+        const char **module_data, void (**free_module_data)(void *model_data, void *user_data))
+{
+    *module_data = user_data;
+    *format = LYS_IN_YANG;
+    *free_module_data = NULL;
+    return LY_SUCCESS;
+}
+
+static void
+test_models(void **state)
+{
+    struct ly_in *in;
+    const char *str;
+    struct lys_module *mod1, *mod2;
+    struct lys_glob_unres unres = {0};
+
+    /* use own context with extra flags */
+    ly_ctx_destroy(UTEST_LYCTX);
+
+    /* invalid arguments */
+    assert_int_equal(0, ly_ctx_get_change_count(NULL));
+    CHECK_LOG("Invalid argument ctx (ly_ctx_get_change_count()).", NULL);
+
+    assert_int_equal(LY_SUCCESS, ly_ctx_new(NULL, LY_CTX_DISABLE_SEARCHDIRS, &UTEST_LYCTX));
+    assert_int_equal(UTEST_LYCTX->change_count, ly_ctx_get_change_count(UTEST_LYCTX));
+
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory("module x {namespace urn:x;prefix x;}", &in));
+    assert_int_equal(LY_EINVAL, lys_parse_in(UTEST_LYCTX, in, 4, NULL, NULL, &unres.creating, &mod1));
+    lys_unres_glob_erase(&unres);
+    ly_in_free(in, 0);
+    CHECK_LOG_CTX("Invalid schema input format.", NULL);
+
+    /* import callback */
+    ly_ctx_set_module_imp_clb(UTEST_LYCTX, test_imp_clb, (void *)(str = "test"));
+    assert_ptr_equal(test_imp_clb, UTEST_LYCTX->imp_clb);
+    assert_ptr_equal(str, UTEST_LYCTX->imp_clb_data);
+    assert_ptr_equal(test_imp_clb, ly_ctx_get_module_imp_clb(UTEST_LYCTX, (void **)&str));
+    assert_string_equal("test", str);
+
+    ly_ctx_set_module_imp_clb(UTEST_LYCTX, NULL, NULL);
+    assert_null(UTEST_LYCTX->imp_clb);
+    assert_null(UTEST_LYCTX->imp_clb_data);
+
+    /* name collision of module and submodule */
+    ly_ctx_set_module_imp_clb(UTEST_LYCTX, test_imp_clb, "submodule y {belongs-to a {prefix a;} revision 2018-10-30;}");
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory("module y {namespace urn:y;prefix y;include y;}", &in));
+    assert_int_equal(LY_EVALID, lys_parse_in(UTEST_LYCTX, in, LYS_IN_YANG, NULL, NULL, &unres.creating, &mod1));
+    lys_unres_glob_erase(&unres);
+    ly_in_free(in, 0);
+    CHECK_LOG_CTX("Parsing module \"y\" failed.", NULL,
+            "Name collision between module and submodule of name \"y\".", "Line number 1.");
+
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory("module a {namespace urn:a;prefix a;include y;revision 2018-10-30; }", &in));
+    assert_int_equal(LY_SUCCESS, lys_parse_in(UTEST_LYCTX, in, LYS_IN_YANG, NULL, NULL, &unres.creating, &mod1));
+    ly_in_free(in, 0);
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory("module y {namespace urn:y;prefix y;}", &in));
+    assert_int_equal(LY_EVALID, lys_parse_in(UTEST_LYCTX, in, LYS_IN_YANG, NULL, NULL, &unres.creating, &mod1));
+    lys_unres_glob_erase(&unres);
+    ly_in_free(in, 0);
+    CHECK_LOG_CTX("Parsing module \"y\" failed.", NULL,
+            "Name collision between module and submodule of name \"y\".", "Line number 1.");
+
+    ly_ctx_set_module_imp_clb(UTEST_LYCTX, test_imp_clb, "submodule y {belongs-to b {prefix b;}}");
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory("module b {namespace urn:b;prefix b;include y;}", &in));
+    assert_int_equal(LY_EVALID, lys_parse_in(UTEST_LYCTX, in, LYS_IN_YANG, NULL, NULL, &unres.creating, &mod1));
+    lys_unres_glob_revert(UTEST_LYCTX, &unres);
+    lys_unres_glob_erase(&unres);
+    ly_in_free(in, 0);
+    CHECK_LOG_CTX("Parsing module \"b\" failed.", NULL,
+            "Including \"y\" submodule into \"b\" failed.", NULL,
+            "Parsing submodule failed.", NULL,
+            "Name collision between submodules of name \"y\".", "Line number 1.");
+
+    /* selecting correct revision of the submodules */
+    ly_ctx_reset_latests(UTEST_LYCTX);
+    ly_ctx_set_module_imp_clb(UTEST_LYCTX, test_imp_clb, "submodule y {belongs-to a {prefix a;} revision 2018-10-31;}");
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory("module a {namespace urn:a;prefix a;include y; revision 2018-10-31;}", &in));
+    assert_int_equal(LY_SUCCESS, lys_parse_in(UTEST_LYCTX, in, LYS_IN_YANG, NULL, NULL, &unres.creating, &mod2));
+    lys_unres_glob_erase(&unres);
+    ly_in_free(in, 0);
+    assert_string_equal("2018-10-31", mod2->parsed->includes[0].submodule->revs[0].date);
+
+    /* reloading module in case only the compiled module resists in the context */
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory("module w {namespace urn:w;prefix w;revision 2018-10-24;}", &in));
+    assert_int_equal(LY_SUCCESS, lys_parse(UTEST_LYCTX, in, LYS_IN_YANG, NULL, &mod1));
+    ly_in_free(in, 0);
+    assert_non_null(mod1->compiled);
+    assert_non_null(mod1->parsed);
+
+#if 0
+    /* TODO in case we are able to remove the parsed schema, here we will test how it will handle missing import parsed schema */
+
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory("module z {namespace urn:z;prefix z;import w {prefix w;revision-date 2018-10-24;}}", &in));
+    /* mod1->parsed is necessary to compile mod2 because of possible groupings, typedefs, ... */
+    ly_ctx_set_module_imp_clb(UTEST_LYCTX, NULL, NULL);
+    assert_int_equal(LY_ENOTFOUND, lys_create_module(UTEST_LYCTX, in, LYS_IN_YANG, 1, NULL, NULL, &mod2));
+    /*logbuf_assert("Unable to reload \"w\" module to import it into \"z\", source data not found.");*/
+    CHECK_LOG_CTX("Recompilation of module \"w\" failed.", NULL);
+    assert_null(mod2);
+    ly_in_free(in, 0);
+#endif
+
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory("module z {namespace urn:z;prefix z;import w {prefix w;revision-date 2018-10-24;}}", &in));
+    ly_ctx_set_module_imp_clb(UTEST_LYCTX, test_imp_clb, "module w {namespace urn:w;prefix w;revision 2018-10-24;}");
+    assert_int_equal(LY_SUCCESS, lys_parse(UTEST_LYCTX, in, LYS_IN_YANG, NULL, &mod2));
+    ly_in_free(in, 0);
+    assert_non_null(mod2);
+    assert_non_null(mod1->parsed);
+    assert_string_equal("w", mod1->name);
+}
+
+static void
+test_imports(void **state)
+{
+    struct lys_module *mod1, *mod2, *mod3, *import;
+    char *str;
+    uint16_t ctx_options;
+
+    /* use own context with extra flags */
+    ly_ctx_destroy(UTEST_LYCTX);
+    ctx_options = LY_CTX_DISABLE_SEARCHDIRS | LY_CTX_NO_YANGLIBRARY;
+
+    /* Import callback provides newer revision of module 'a',
+     * however the older revision is implemented soon and therefore it is preferred. */
+    assert_int_equal(LY_SUCCESS, ly_ctx_new(NULL, ctx_options, &UTEST_LYCTX));
+    ly_ctx_set_module_imp_clb(UTEST_LYCTX, test_imp_clb, "module a {namespace urn:a; prefix a; revision 2019-09-17;}");
+    assert_int_equal(LY_SUCCESS, lys_parse_mem(UTEST_LYCTX, "module a {namespace urn:a;prefix a;revision 2019-09-16;}",
+            LYS_IN_YANG, &mod1));
+    assert_true(LYS_MOD_LATEST_REV & mod1->latest_revision);
+    assert_int_equal(1, mod1->implemented);
+    assert_int_equal(LY_SUCCESS, lys_parse_mem(UTEST_LYCTX, "module b {namespace urn:b;prefix b;import a {prefix a;}}",
+            LYS_IN_YANG, &mod2));
+    assert_ptr_equal(mod1, mod2->parsed->imports[0].module);
+    assert_true((LYS_MOD_LATEST_REV | LYS_MOD_IMPORTED_REV) & mod1->latest_revision);
+    assert_string_equal("2019-09-16", mod1->revision);
+    assert_int_equal(1, mod1->implemented);
+    assert_non_null(ly_ctx_get_module(UTEST_LYCTX, "a", "2019-09-16"));
+    ly_ctx_destroy(UTEST_LYCTX);
+
+    /* Import callback provides older revision of module 'a' and it is
+     * imported by another module, so it is preferred even if newer
+     * revision is implemented later. */
+    assert_int_equal(LY_SUCCESS, ly_ctx_new(NULL, ctx_options, &UTEST_LYCTX));
+    ly_ctx_set_module_imp_clb(UTEST_LYCTX, test_imp_clb, "module a {namespace urn:a; prefix a; revision 2019-09-16;}");
+    assert_int_equal(LY_SUCCESS, lys_parse_mem(UTEST_LYCTX, "module b {namespace urn:b;prefix b;import a {prefix a;}}",
+            LYS_IN_YANG, &mod2));
+    assert_int_equal(LY_SUCCESS, lys_parse_mem(UTEST_LYCTX, "module a {namespace urn:a;prefix a;revision 2019-09-17;}",
+            LYS_IN_YANG, &mod1));
+    ly_log_level(LY_LLVRB);
+    assert_int_equal(LY_SUCCESS, lys_parse_mem(UTEST_LYCTX, "module c {namespace urn:c;prefix c;import a {prefix a;}}",
+            LYS_IN_YANG, &mod3));
+    CHECK_LOG("Implemented module \"a@2019-09-17\" is not used for import, revision \"2019-09-16\" is imported instead.", NULL);
+    ly_log_level(LY_LLWRN);
+    assert_true(LYS_MOD_LATEST_SEARCHDIRS & mod1->latest_revision);
+    assert_int_equal(1, mod1->implemented);
+    import = mod2->parsed->imports[0].module;
+    assert_true(LYS_MOD_IMPORTED_REV & import->latest_revision);
+    assert_string_equal("2019-09-16", import->revision);
+    assert_int_equal(0, import->implemented);
+    import = mod3->parsed->imports[0].module;
+    assert_string_equal("2019-09-16", import->revision);
+    assert_non_null(ly_ctx_get_module(UTEST_LYCTX, "a", "2019-09-16"));
+    assert_non_null(ly_ctx_get_module(UTEST_LYCTX, "a", "2019-09-17"));
+    assert_string_equal("2019-09-17", ly_ctx_get_module_implemented(UTEST_LYCTX, "a")->revision);
+    ly_ctx_destroy(UTEST_LYCTX);
+
+    /* check of circular dependency */
+    assert_int_equal(LY_SUCCESS, ly_ctx_new(NULL, ctx_options, &UTEST_LYCTX));
+    str = "module a {namespace urn:a; prefix a;"
+            "import b {prefix b;}"
+            "}";
+    ly_ctx_set_module_imp_clb(UTEST_LYCTX, test_imp_clb, str);
+    str = "module b { yang-version 1.1; namespace urn:b; prefix b;"
+            "import a {prefix a;}"
+            "}";
+    assert_int_equal(LY_EVALID, lys_parse_mem(UTEST_LYCTX, str, LYS_IN_YANG, NULL));
+}
+
+static void
+test_get_models(void **state)
+{
+    struct lys_module *mod, *mod2;
+    const char *str0 = "module a {namespace urn:a;prefix a;}";
+    const char *str1 = "module a {namespace urn:a;prefix a;revision 2018-10-23;}";
+    const char *str2 = "module a {namespace urn:a;prefix a;revision 2018-10-23;revision 2018-10-24;}";
+    struct ly_in *in0, *in1, *in2;
+    struct lys_glob_unres unres = {0};
+
+    unsigned int index = 0;
+    const char *names[] = {
+        "ietf-yang-metadata", "yang", "ietf-inet-types", "ietf-yang-types", "ietf-yang-schema-mount",
+        "ietf-yang-structure-ext", "ietf-datastores", "ietf-yang-library", "a", "a", "a"
+    };
+
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str0, &in0));
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str1, &in1));
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str2, &in2));
+
+    /* invalid arguments */
+    assert_ptr_equal(NULL, ly_ctx_get_module(NULL, NULL, NULL));
+    CHECK_LOG("Invalid argument ctx (ly_ctx_get_module()).", NULL);
+    assert_ptr_equal(NULL, ly_ctx_get_module(UTEST_LYCTX, NULL, NULL));
+    CHECK_LOG_CTX("Invalid argument name (ly_ctx_get_module()).", NULL);
+    assert_ptr_equal(NULL, ly_ctx_get_module_ns(NULL, NULL, NULL));
+    CHECK_LOG("Invalid argument ctx (ly_ctx_get_module_ns()).", NULL);
+    assert_ptr_equal(NULL, ly_ctx_get_module_ns(UTEST_LYCTX, NULL, NULL));
+    CHECK_LOG_CTX("Invalid argument ns (ly_ctx_get_module_ns()).", NULL);
+    assert_null(ly_ctx_get_module(UTEST_LYCTX, "nonsence", NULL));
+
+    /* internal modules */
+    assert_null(ly_ctx_get_module_implemented(UTEST_LYCTX, "ietf-yang-types"));
+    mod = ly_ctx_get_module_implemented(UTEST_LYCTX, "yang");
+    assert_non_null(mod);
+    assert_non_null(mod->parsed);
+    assert_string_equal("yang", mod->name);
+    mod2 = ly_ctx_get_module_implemented_ns(UTEST_LYCTX, mod->ns);
+    assert_ptr_equal(mod, mod2);
+    assert_non_null(ly_ctx_get_module(UTEST_LYCTX, "ietf-yang-metadata", "2016-08-05"));
+    assert_non_null(ly_ctx_get_module(UTEST_LYCTX, "ietf-yang-types", "2013-07-15"));
+    assert_non_null(ly_ctx_get_module(UTEST_LYCTX, "ietf-inet-types", "2013-07-15"));
+    assert_non_null(ly_ctx_get_module_ns(UTEST_LYCTX, "urn:ietf:params:xml:ns:yang:ietf-datastores", "2018-02-14"));
+
+    /* select module by revision */
+    assert_int_equal(LY_SUCCESS, lys_parse(UTEST_LYCTX, in1, LYS_IN_YANG, NULL, &mod));
+    /* invalid attempts - implementing module of the same name and inserting the same module */
+    assert_int_equal(LY_SUCCESS, lys_parse_in(UTEST_LYCTX, in2, LYS_IN_YANG, NULL, NULL, &unres.creating, &mod2));
+    assert_int_equal(LY_EDENIED, lys_implement(mod2, NULL, &unres));
+    CHECK_LOG_CTX("Module \"a@2018-10-24\" is already implemented in revision \"2018-10-23\".", NULL);
+    lys_unres_glob_erase(&unres);
+    ly_in_reset(in1);
+    /* it is already there, fine */
+    assert_int_equal(LY_SUCCESS, lys_parse_in(UTEST_LYCTX, in1, LYS_IN_YANG, NULL, NULL, &unres.creating, NULL));
+    /* insert the second module only as imported, not implemented */
+    lys_unres_glob_erase(&unres);
+    ly_in_reset(in2);
+    assert_int_equal(LY_SUCCESS, lys_parse_in(UTEST_LYCTX, in2, LYS_IN_YANG, NULL, NULL, &unres.creating, &mod2));
+    lys_unres_glob_erase(&unres);
+    assert_non_null(mod2);
+    assert_ptr_not_equal(mod, mod2);
+    mod = ly_ctx_get_module_latest(UTEST_LYCTX, "a");
+    assert_ptr_equal(mod, mod2);
+    mod2 = ly_ctx_get_module_latest_ns(UTEST_LYCTX, mod->ns);
+    assert_ptr_equal(mod, mod2);
+    /* work with module with no revision */
+    assert_int_equal(LY_SUCCESS, lys_parse_in(UTEST_LYCTX, in0, LYS_IN_YANG, NULL, NULL, &unres.creating, &mod));
+    lys_unres_glob_erase(&unres);
+    assert_ptr_equal(mod, ly_ctx_get_module(UTEST_LYCTX, "a", NULL));
+    assert_ptr_not_equal(mod, ly_ctx_get_module_latest(UTEST_LYCTX, "a"));
+
+    str1 = "submodule b {belongs-to a {prefix a;}}";
+    ly_in_free(in1, 0);
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str1, &in1));
+    assert_int_equal(LY_EINVAL, lys_parse_in(UTEST_LYCTX, in1, LYS_IN_YANG, NULL, NULL, &unres.creating, &mod));
+    CHECK_LOG_CTX("Input data contains submodule which cannot be parsed directly without its main module.", NULL);
+    lys_unres_glob_erase(&unres);
+
+    while ((mod = (struct lys_module *)ly_ctx_get_module_iter(UTEST_LYCTX, &index))) {
+        assert_string_equal(names[index - 1], mod->name);
+    }
+    assert_int_equal(11, index);
+
+    /* cleanup */
+    ly_in_free(in0, 0);
+    ly_in_free(in1, 0);
+    ly_in_free(in2, 0);
+}
+
+static void
+test_ylmem(void **state)
+{
+#define DATA_YANG_LIBRARY_START "<yang-library xmlns=\"urn:ietf:params:xml:ns:yang:ietf-yang-library\">\n"\
+    "  <module-set>\n"\
+    "    <name>complete</name>\n"\
+    "    <module>\n"\
+    "      <name>yang</name>\n"\
+    "      <revision>2022-06-16</revision>\n"\
+    "      <namespace>urn:ietf:params:xml:ns:yang:1</namespace>\n"\
+    "    </module>\n"\
+    "    <module>\n"\
+    "      <name>ietf-yang-library</name>\n"\
+    "      <revision>2019-01-04</revision>\n"\
+    "      <namespace>urn:ietf:params:xml:ns:yang:ietf-yang-library</namespace>\n"\
+    "    </module>\n"
+
+#define DATA_YANG_BASE_IMPORTS     "    <import-only-module>\n"\
+    "      <name>ietf-yang-metadata</name>\n"\
+    "      <revision>2016-08-05</revision>\n"\
+    "      <namespace>urn:ietf:params:xml:ns:yang:ietf-yang-metadata</namespace>\n"\
+    "    </import-only-module>\n"\
+    "    <import-only-module>\n"\
+    "      <name>ietf-inet-types</name>\n"\
+    "      <revision>2013-07-15</revision>\n"\
+    "      <namespace>urn:ietf:params:xml:ns:yang:ietf-inet-types</namespace>\n"\
+    "    </import-only-module>\n"\
+    "    <import-only-module>\n"\
+    "      <name>ietf-yang-types</name>\n"\
+    "      <revision>2013-07-15</revision>\n"\
+    "      <namespace>urn:ietf:params:xml:ns:yang:ietf-yang-types</namespace>\n"\
+    "    </import-only-module>\n"\
+    "    <import-only-module>\n"\
+    "      <name>ietf-datastores</name>\n"\
+    "      <revision>2018-02-14</revision>\n"\
+    "      <namespace>urn:ietf:params:xml:ns:yang:ietf-datastores</namespace>\n"\
+    "    </import-only-module>\n"
+
+#define DATA_YANG_SCHEMA_MODULE_STATE         "  </module-set>\n"\
+    "  <schema>\n"\
+    "    <name>complete</name>\n"\
+    "    <module-set>complete</module-set>\n"\
+    "  </schema>\n"\
+    "  <content-id>9</content-id>\n"\
+    "</yang-library>\n"\
+    "<modules-state xmlns=\"urn:ietf:params:xml:ns:yang:ietf-yang-library\">\n"\
+    "  <module-set-id>12</module-set-id>\n"\
+    "  <module>\n"\
+    "    <name>ietf-yang-metadata</name>\n"\
+    "    <revision>2016-08-05</revision>\n"\
+    "    <namespace>urn:ietf:params:xml:ns:yang:ietf-yang-metadata</namespace>\n"\
+    "    <conformance-type>import</conformance-type>\n"\
+    "  </module>\n"\
+    "  <module>\n"\
+    "    <name>yang</name>\n"\
+    "    <revision>2022-06-16</revision>\n"\
+    "    <namespace>urn:ietf:params:xml:ns:yang:1</namespace>\n"\
+    "    <conformance-type>implement</conformance-type>\n"\
+    "  </module>\n"\
+    "  <module>\n"\
+    "    <name>ietf-inet-types</name>\n"\
+    "    <revision>2013-07-15</revision>\n"\
+    "    <namespace>urn:ietf:params:xml:ns:yang:ietf-inet-types</namespace>\n"\
+    "    <conformance-type>import</conformance-type>\n"\
+    "  </module>\n"\
+    "  <module>\n"\
+    "    <name>ietf-yang-types</name>\n"\
+    "    <revision>2013-07-15</revision>\n"\
+    "    <namespace>urn:ietf:params:xml:ns:yang:ietf-yang-types</namespace>\n"\
+    "    <conformance-type>import</conformance-type>\n"\
+    "  </module>\n"\
+    "  <module>\n"\
+    "    <name>ietf-yang-library</name>\n"\
+    "    <revision>2019-01-04</revision>\n"\
+    "    <namespace>urn:ietf:params:xml:ns:yang:ietf-yang-library</namespace>\n"\
+    "    <conformance-type>implement</conformance-type>\n"\
+    "  </module>\n"\
+    "  <module>\n"\
+    "    <name>ietf-datastores</name>\n"\
+    "    <revision>2018-02-14</revision>\n"\
+    "    <namespace>urn:ietf:params:xml:ns:yang:ietf-datastores</namespace>\n"\
+    "    <conformance-type>import</conformance-type>\n"\
+    "  </module>\n"
+
+    const char *yanglibrary_only =
+            DATA_YANG_LIBRARY_START
+            DATA_YANG_BASE_IMPORTS
+            DATA_YANG_SCHEMA_MODULE_STATE
+            "</modules-state>\n";
+
+    const char *with_netconf =
+            DATA_YANG_LIBRARY_START
+            "    <module>\n"
+            "      <name>ietf-netconf</name>\n"
+            "      <revision>2011-06-01</revision>\n"
+            "      <namespace>urn:ietf:params:xml:ns:netconf:base:1.0</namespace>\n"
+            "    </module>\n"
+            DATA_YANG_BASE_IMPORTS
+            "    <import-only-module>\n"
+            "      <name>ietf-netconf-acm</name>\n"
+            "      <revision>2018-02-14</revision>\n"
+            "      <namespace>urn:ietf:params:xml:ns:yang:ietf-netconf-acm</namespace>\n"
+            "    </import-only-module>\n"
+            DATA_YANG_SCHEMA_MODULE_STATE
+            "  <module>\n"
+            "    <name>ietf-netconf</name>\n"
+            "    <revision>2011-06-01</revision>\n"
+            "    <namespace>urn:ietf:params:xml:ns:netconf:base:1.0</namespace>\n"
+            "    <conformance-type>implement</conformance-type>\n"
+            "  </module>\n"
+            "  <module>\n"
+            "    <name>ietf-netconf-acm</name>\n"
+            "    <revision>2018-02-14</revision>\n"
+            "    <namespace>urn:ietf:params:xml:ns:yang:ietf-netconf-acm</namespace>\n"
+            "    <conformance-type>import</conformance-type>\n"
+            "  </module>\n"
+            "</modules-state>";
+
+    char *with_netconf_features = malloc(8096);
+
+    strcpy(with_netconf_features,
+            DATA_YANG_LIBRARY_START
+            "    <module>\n"
+            "      <name>ietf-netconf</name>\n"
+            "      <revision>2011-06-01</revision>\n"
+            "      <namespace>urn:ietf:params:xml:ns:netconf:base:1.0</namespace>\n"
+            "      <feature>writable-running</feature>\n"
+            "      <feature>candidate</feature>\n"
+            "      <feature>confirmed-commit</feature>\n"
+            "      <feature>rollback-on-error</feature>\n"
+            "      <feature>validate</feature>\n"
+            "      <feature>startup</feature>\n"
+            "      <feature>url</feature>\n"
+            "      <feature>xpath</feature>\n"
+            "    </module>\n"
+            "    <import-only-module>\n"
+            "      <name>ietf-yang-metadata</name>\n"
+            "      <revision>2016-08-05</revision>\n"
+            "      <namespace>urn:ietf:params:xml:ns:yang:ietf-yang-metadata</namespace>\n"
+            "    </import-only-module>\n"
+            "    <import-only-module>\n"
+            "      <name>ietf-inet-types</name>\n"
+            "      <revision>2013-07-15</revision>\n"
+            "      <namespace>urn:ietf:params:xml:ns:yang:ietf-inet-types</namespace>\n"
+            "    </import-only-module>\n"
+            "    <import-only-module>\n"
+            "      <name>ietf-yang-types</name>\n"
+            "      <revision>2013-07-15</revision>\n"
+            "      <namespace>urn:ietf:params:xml:ns:yang:ietf-yang-types</namespace>\n"
+            "    </import-only-module>\n"
+            "    <import-only-module>\n"
+            "      <name>ietf-datastores</name>\n"
+            "      <revision>2018-02-14</revision>\n"
+            "      <namespace>urn:ietf:params:xml:ns:yang:ietf-datastores</namespace>\n"
+            "    </import-only-module>\n"
+            "    <import-only-module>\n"
+            "      <name>ietf-netconf-acm</name>\n"
+            "      <revision>2018-02-14</revision>\n"
+            "      <namespace>urn:ietf:params:xml:ns:yang:ietf-netconf-acm</namespace>\n"
+            "    </import-only-module>\n");
+    strcpy(with_netconf_features + strlen(with_netconf_features),
+            DATA_YANG_SCHEMA_MODULE_STATE
+            "  <module>\n"
+            "    <name>ietf-netconf</name>\n"
+            "    <revision>2011-06-01</revision>\n"
+            "    <namespace>urn:ietf:params:xml:ns:netconf:base:1.0</namespace>\n"
+            "    <feature>writable-running</feature>\n"
+            "    <feature>candidate</feature>\n"
+            "    <feature>confirmed-commit</feature>\n"
+            "    <feature>rollback-on-error</feature>\n"
+            "    <feature>validate</feature>\n"
+            "    <feature>startup</feature>\n"
+            "    <feature>url</feature>\n"
+            "    <feature>xpath</feature>\n"
+            "    <conformance-type>implement</conformance-type>\n"
+            "  </module>\n"
+            "  <module>\n"
+            "    <name>ietf-netconf-acm</name>\n"
+            "    <revision>2018-02-14</revision>\n"
+            "    <namespace>urn:ietf:params:xml:ns:yang:ietf-netconf-acm</namespace>\n"
+            "    <conformance-type>import</conformance-type>\n"
+            "  </module>\n"
+            "</modules-state>");
+
+    const char *garbage_revision =
+            "<yang-library xmlns=\"urn:ietf:params:xml:ns:yang:ietf-yang-library\">\n"
+            "  <module-set>\n"
+            "    <name>complete</name>\n"
+            "    <module>\n"
+            "      <name>yang</name>\n"
+            "      <revision>2022-06-16</revision>\n"
+            "      <namespace>urn:ietf:params:xml:ns:yang:1</namespace>\n"
+            "    </module>\n"
+            "    <module>\n"
+            "      <name>ietf-yang-library</name>\n"
+            "      <revision>2019-01-01</revision>\n"
+            "      <namespace>urn:ietf:params:xml:ns:yang:ietf-yang-library</namespace>\n"
+            "    </module>\n"
+            DATA_YANG_BASE_IMPORTS
+            DATA_YANG_SCHEMA_MODULE_STATE
+            "</modules-state>\n";
+
+    const char *no_yanglibrary =
+            "<yang-library xmlns=\"urn:ietf:params:xml:ns:yang:ietf-yang-library\">\n"
+            "  <module-set>\n"
+            "    <name>complete</name>\n"
+            "    <module>\n"
+            "      <name>yang</name>\n"
+            "      <revision>2022-06-16</revision>\n"
+            "      <namespace>urn:ietf:params:xml:ns:yang:1</namespace>\n"
+            "    </module>\n"
+            DATA_YANG_BASE_IMPORTS
+            DATA_YANG_SCHEMA_MODULE_STATE
+            "</modules-state>\n";
+
+    (void) state;
+    /* seperate context to avoid double free during teadown */
+    struct ly_ctx *ctx_test = NULL;
+
+    /* test invalid parameters */
+    assert_int_equal(LY_EINVAL, ly_ctx_new_ylpath(NULL, NULL, LYD_XML, 0, &ctx_test));
+    assert_int_equal(LY_EINVAL, ly_ctx_new_ylpath(NULL, TESTS_SRC, LYD_XML, 0, NULL));
+    assert_int_equal(LY_ESYS, ly_ctx_new_ylpath(NULL, TESTS_SRC "garbage", LYD_XML, 0, &ctx_test));
+
+    /* basic test with ietf-yang-library-only */
+    assert_int_equal(LY_SUCCESS, ly_ctx_new_ylmem(TESTS_SRC "/modules/yang/", yanglibrary_only, LYD_XML, 0, &ctx_test));
+    assert_non_null(ly_ctx_get_module(ctx_test, "ietf-yang-library", "2019-01-04"));
+    assert_null(ly_ctx_get_module(ctx_test, "ietf-netconf", "2011-06-01"));
+    ly_ctx_destroy(ctx_test);
+    ctx_test = NULL;
+
+    /* test loading module, should also import other module */
+    assert_int_equal(LY_SUCCESS, ly_ctx_new_ylmem(TESTS_SRC "/modules/yang/", with_netconf, LYD_XML, 0, &ctx_test));
+    assert_non_null(ly_ctx_get_module(ctx_test, "ietf-netconf", "2011-06-01"));
+    assert_int_equal(1, ly_ctx_get_module(ctx_test, "ietf-netconf", "2011-06-01")->implemented);
+    assert_non_null(ly_ctx_get_module(ctx_test, "ietf-netconf-acm", "2018-02-14"));
+    assert_int_equal(0, ly_ctx_get_module(ctx_test, "ietf-netconf-acm", "2018-02-14")->implemented);
+    assert_int_equal(LY_ENOT, lys_feature_value(ly_ctx_get_module(ctx_test, "ietf-netconf", "2011-06-01"), "url"));
+    ly_ctx_destroy(ctx_test);
+    ctx_test = NULL;
+
+    /* test loading module with feature if they are present */
+    assert_int_equal(LY_SUCCESS, ly_ctx_new_ylmem(TESTS_SRC "/modules/yang/", with_netconf_features, LYD_XML, 0, &ctx_test));
+    assert_non_null(ly_ctx_get_module(ctx_test, "ietf-netconf", "2011-06-01"));
+    assert_non_null(ly_ctx_get_module(ctx_test, "ietf-netconf-acm", "2018-02-14"));
+    assert_int_equal(LY_SUCCESS, lys_feature_value(ly_ctx_get_module(ctx_test, "ietf-netconf", "2011-06-01"), "url"));
+    ly_ctx_destroy(ctx_test);
+    ctx_test = NULL;
+
+    /* test with not matching revision */
+    assert_int_equal(LY_EINVAL, ly_ctx_new_ylmem(TESTS_SRC "/modules/yang/", garbage_revision, LYD_XML, 0, &ctx_test));
+
+    /* test data containing ietf-yang-library which conflicts with the option */
+    assert_int_equal(LY_EINVAL, ly_ctx_new_ylmem(TESTS_SRC "/modules/yang/", with_netconf_features, LYD_XML, LY_CTX_NO_YANGLIBRARY, &ctx_test));
+
+    /* test creating without ietf-yang-library */
+    assert_int_equal(LY_SUCCESS, ly_ctx_new_ylmem(TESTS_SRC "/modules/yang/", no_yanglibrary, LYD_XML, LY_CTX_NO_YANGLIBRARY, &ctx_test));
+    assert_int_equal(NULL, ly_ctx_get_module(ctx_test, "ietf-yang-library", "2019-01-04"));
+    ly_ctx_destroy(ctx_test);
+    free(with_netconf_features);
+}
+
+static LY_ERR
+check_node_priv_parsed_is_set(struct lysc_node *node, void *data, ly_bool *UNUSED(dfs_continue))
+{
+    const struct lysp_node *pnode;
+    const char ***iter;
+
+    pnode = (const struct lysp_node *)node->priv;
+    CHECK_POINTER(pnode, 1);
+    iter = (const char ***)data;
+    CHECK_POINTER(**iter, 1);
+    CHECK_STRING(pnode->name, **iter);
+    (*iter)++;
+
+    return LY_SUCCESS;
+}
+
+static LY_ERR
+check_node_priv_parsed_not_set(struct lysc_node *node, void *UNUSED(data), ly_bool *UNUSED(dfs_continue))
+{
+    CHECK_POINTER(node->priv, 0);
+    return LY_SUCCESS;
+}
+
+static void
+check_ext_instance_priv_parsed_is_set(struct lysc_ext_instance *ext)
+{
+    LY_ARRAY_COUNT_TYPE u, v;
+    struct lysc_ext_substmt *substmts;
+    struct lysc_node *cnode;
+    const char **iter;
+    const char *check[] = {
+        "tmp_cont", "lf", NULL
+    };
+
+    LY_ARRAY_FOR(ext, u) {
+        substmts = ext[u].substmts;
+        LY_ARRAY_FOR(substmts, v) {
+            if (substmts && substmts[v].storage && (substmts[v].stmt & LY_STMT_DATA_NODE_MASK)) {
+                cnode = *(struct lysc_node **)substmts[v].storage;
+                iter = check;
+                assert_int_equal(LY_SUCCESS, lysc_tree_dfs_full(cnode, check_node_priv_parsed_is_set, &iter));
+            }
+        }
+    }
+}
+
+static void
+check_ext_instance_priv_parsed_not_set(struct lysc_ext_instance *ext)
+{
+    LY_ARRAY_COUNT_TYPE u, v;
+    struct lysc_ext_substmt *substmts;
+    struct lysc_node *cnode;
+
+    LY_ARRAY_FOR(ext, u) {
+        substmts = ext[u].substmts;
+        LY_ARRAY_FOR(substmts, v) {
+            if (substmts && substmts[v].storage && (substmts[v].stmt & LY_STMT_DATA_NODE_MASK)) {
+                cnode = *(struct lysc_node **)substmts[v].storage;
+                if (cnode) {
+                    CHECK_POINTER((struct lysp_node *)cnode->priv, 0);
+                }
+            }
+        }
+    }
+}
+
+/**
+ * @brief Testing of LY_CTX_SET_PRIV_PARSED.
+ */
+static void
+test_set_priv_parsed(void **state)
+{
+    struct lys_module *mod;
+    const char *schema_a;
+    const char **iter;
+    const char *check[] = {
+        "cont", "contnotif", "contx", "grpleaf", "augleaf", "l1",
+        "l1a", "l1b", "l1c", "foo1", "ll", "any", "l2",
+        "l2c", "l2cx", "ch", "cas", "casx", "oper",
+        "input", "inparam", "output", "outparam", "n1", NULL
+    };
+
+    /* each node must have a unique name. */
+    schema_a = "module a {\n"
+            "  namespace urn:tests:a;\n"
+            "  prefix a;yang-version 1.1;\n"
+            "\n"
+            "  import ietf-restconf {\n"
+            "    prefix rc;\n"
+            "    revision-date 2017-01-26;\n"
+            "  }\n"
+            "\n"
+            "  rc:yang-data \"tmp\" {\n"
+            "    container tmp_cont {\n"
+            "      leaf lf {\n"
+            "        type string;\n"
+            "      }\n"
+            "    }\n"
+            "  }\n"
+            "  container cont {\n"
+            "    notification contnotif;\n"
+            "    leaf-list contx {\n"
+            "      type string;\n"
+            "    }\n"
+            "    uses grp;\n"
+            "  }\n"
+            "  list l1 {\n"
+            "    key \"l1a l1b\";\n"
+            "    leaf l1a {\n"
+            "      type string;\n"
+            "    }\n"
+            "    leaf l1b {\n"
+            "      type string;\n"
+            "    }\n"
+            "    leaf l1c {\n"
+            "      type string;\n"
+            "    }\n"
+            "  }\n"
+            "  feature f1;\n"
+            "  feature f2;\n"
+            "  leaf foo1 {\n"
+            "    type uint16;\n"
+            "    if-feature f1;\n"
+            "  }\n"
+            "  leaf foo2 {\n"
+            "    type uint16;\n"
+            "  }\n"
+            "  leaf foo3 {\n"
+            "    type uint16;\n"
+            "    if-feature f2;\n"
+            "  }\n"
+            "  leaf-list ll {\n"
+            "    type string;\n"
+            "  }\n"
+            "  anydata any {\n"
+            "    config false;\n"
+            "  }\n"
+            "  list l2 {\n"
+            "    config false;\n"
+            "    container l2c {\n"
+            "      leaf l2cx {\n"
+            "        type string;\n"
+            "      }\n"
+            "    }\n"
+            "  }\n"
+            "  choice ch {\n"
+            "    case cas {\n"
+            "      leaf casx {\n"
+            "        type string;\n"
+            "      }\n"
+            "    }\n"
+            "  }\n"
+            "  rpc oper {\n"
+            "    input {\n"
+            "      leaf inparam {\n"
+            "        type string;\n"
+            "      }\n"
+            "    }\n"
+            "    output {\n"
+            "      leaf outparam {\n"
+            "        type int8;\n"
+            "      }\n"
+            "    }\n"
+            "  }\n"
+            "  notification n1;\n"
+            "  grouping grp {\n"
+            "    leaf grpleaf {\n"
+            "      type uint16;\n"
+            "    }\n"
+            "  }\n"
+            "  augment /cont {\n"
+            "    leaf augleaf {\n"
+            "      type uint16;\n"
+            "    }\n"
+            "  }\n"
+            "  deviation /a:foo2 {\n"
+            "    deviate not-supported;\n"
+            "  }\n"
+            "}\n";
+
+    /* use own context with extra flags */
+    ly_ctx_destroy(UTEST_LYCTX);
+    const char *feats[] = {"f1", NULL};
+
+    assert_int_equal(LY_SUCCESS, ly_ctx_new(NULL, LY_CTX_SET_PRIV_PARSED, &UTEST_LYCTX));
+    assert_int_equal(LY_SUCCESS, ly_ctx_set_searchdir(UTEST_LYCTX, TESTS_DIR_MODULES_YANG));
+    assert_non_null(ly_ctx_load_module(UTEST_LYCTX, "ietf-restconf", "2017-01-26", NULL));
+    UTEST_ADD_MODULE(schema_a, LYS_IN_YANG, feats, NULL);
+
+    print_message("[          ] create context\n");
+    mod = ly_ctx_get_module(UTEST_LYCTX, "a", NULL);
+    iter = check;
+    assert_int_equal(LY_SUCCESS, lysc_module_dfs_full(mod, check_node_priv_parsed_is_set, &iter));
+    check_ext_instance_priv_parsed_is_set(mod->compiled->exts);
+
+    print_message("[          ] unset option\n");
+    assert_int_equal(LY_SUCCESS, ly_ctx_unset_options(UTEST_LYCTX, LY_CTX_SET_PRIV_PARSED));
+    mod = ly_ctx_get_module(UTEST_LYCTX, "a", NULL);
+    iter = check;
+    assert_int_equal(LY_SUCCESS, lysc_module_dfs_full(mod, check_node_priv_parsed_not_set, &iter));
+    check_ext_instance_priv_parsed_not_set(mod->compiled->exts);
+
+    print_message("[          ] set option\n");
+    assert_int_equal(LY_SUCCESS, ly_ctx_set_options(UTEST_LYCTX, LY_CTX_SET_PRIV_PARSED));
+    mod = ly_ctx_get_module(UTEST_LYCTX, "a", NULL);
+    iter = check;
+    assert_int_equal(LY_SUCCESS, lysc_module_dfs_full(mod, check_node_priv_parsed_is_set, &iter));
+    check_ext_instance_priv_parsed_is_set(mod->compiled->exts);
+}
+
+static void
+test_explicit_compile(void **state)
+{
+    uint32_t i;
+    struct lys_module *mod;
+    const char *schema_a = "module a {\n"
+            "  namespace urn:tests:a;\n"
+            "  prefix a;yang-version 1.1;\n"
+            "  feature f1;\n"
+            "  feature f2;\n"
+            "  leaf foo1 {\n"
+            "    type uint16;\n"
+            "    if-feature f1;\n"
+            "  }\n"
+            "  leaf foo2 {\n"
+            "    type uint16;\n"
+            "  }\n"
+            "  container cont {\n"
+            "    leaf foo3 {\n"
+            "      type string;\n"
+            "    }\n"
+            "  }\n"
+            "}\n";
+    const char *schema_b = "module b {\n"
+            "  namespace urn:tests:b;\n"
+            "  prefix b;yang-version 1.1;\n"
+            "  import a {\n"
+            "    prefix a;\n"
+            "  }\n"
+            "  augment /a:cont {\n"
+            "    leaf augleaf {\n"
+            "      type uint16;\n"
+            "    }\n"
+            "  }\n"
+            "}\n";
+    const char *schema_c = "module c {\n"
+            "  namespace urn:tests:c;\n"
+            "  prefix c;yang-version 1.1;\n"
+            "  import a {\n"
+            "    prefix a;\n"
+            "  }\n"
+            "  deviation /a:foo2 {\n"
+            "    deviate not-supported;\n"
+            "  }\n"
+            "}\n";
+
+    /* use own context with extra flags */
+    ly_ctx_destroy(UTEST_LYCTX);
+    const char *feats[] = {"f1", NULL};
+
+    assert_int_equal(LY_SUCCESS, ly_ctx_new(NULL, LY_CTX_EXPLICIT_COMPILE, &UTEST_LYCTX));
+    UTEST_ADD_MODULE(schema_a, LYS_IN_YANG, NULL, &mod);
+    UTEST_ADD_MODULE(schema_b, LYS_IN_YANG, NULL, NULL);
+    UTEST_ADD_MODULE(schema_c, LYS_IN_YANG, NULL, NULL);
+    assert_int_equal(LY_SUCCESS, lys_set_implemented((struct lys_module *)mod, feats));
+
+    /* none of the modules should be compiled */
+    i = 0;
+    while ((mod = ly_ctx_get_module_iter(UTEST_LYCTX, &i))) {
+        assert_null(mod->compiled);
+    }
+
+    assert_int_equal(LY_SUCCESS, ly_ctx_compile(UTEST_LYCTX));
+
+    /* check internal modules */
+    mod = ly_ctx_get_module_implemented(UTEST_LYCTX, "yang");
+    assert_non_null(mod);
+    mod = ly_ctx_get_module_implemented(UTEST_LYCTX, "ietf-datastores");
+    assert_non_null(mod);
+    mod = ly_ctx_get_module_implemented(UTEST_LYCTX, "ietf-yang-library");
+    assert_non_null(mod);
+
+    /* check test modules */
+    mod = ly_ctx_get_module_implemented(UTEST_LYCTX, "a");
+    assert_non_null(mod);
+    mod = ly_ctx_get_module_implemented(UTEST_LYCTX, "b");
+    assert_non_null(mod);
+    mod = ly_ctx_get_module_implemented(UTEST_LYCTX, "c");
+    assert_non_null(mod);
+}
+
+int
+main(void)
+{
+    const struct CMUnitTest tests[] = {
+        UTEST(test_searchdirs),
+        UTEST(test_options),
+        UTEST(test_models),
+        UTEST(test_imports),
+        UTEST(test_get_models),
+        UTEST(test_ylmem),
+        UTEST(test_set_priv_parsed),
+        UTEST(test_explicit_compile),
+    };
+
+    return cmocka_run_group_tests(tests, NULL, NULL);
+}
diff --git a/tests/utests/basic/test_hash_table.c b/tests/utests/basic/test_hash_table.c
new file mode 100644
index 0000000..25b595a
--- /dev/null
+++ b/tests/utests/basic/test_hash_table.c
@@ -0,0 +1,271 @@
+/*
+ * @file test_hash_table.c
+ * @author: Radek Krejci <rkrejci@cesnet.cz>
+ * @brief unit tests for functions from hash_table.c
+ *
+ * Copyright (c) 2018 CESNET, z.s.p.o.
+ *
+ * This source code is licensed under BSD 3-Clause License (the "License").
+ * You may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://opensource.org/licenses/BSD-3-Clause
+ */
+#define _UTEST_MAIN_
+#include "utests.h"
+
+#include <stdlib.h>
+
+#include "common.h"
+#include "hash_table.h"
+
+struct ht_rec *lyht_get_rec(unsigned char *recs, uint16_t rec_size, uint32_t idx);
+
+static void
+test_invalid_arguments(void **state)
+{
+    assert_int_equal(LY_EINVAL, lydict_insert(NULL, NULL, 0, NULL));
+    CHECK_LOG("Invalid argument ctx (lydict_insert()).", NULL);
+
+    assert_int_equal(LY_EINVAL, lydict_insert_zc(NULL, NULL, NULL));
+    CHECK_LOG("Invalid argument ctx (lydict_insert_zc()).", NULL);
+    assert_int_equal(LY_EINVAL, lydict_insert_zc(UTEST_LYCTX, NULL, NULL));
+    CHECK_LOG_CTX("Invalid argument str_p (lydict_insert_zc()).", NULL);
+}
+
+static void
+test_dict_hit(void **state)
+{
+    const char *str1, *str2, *str3;
+
+    /* insert 2 strings, one of them repeatedly */
+    assert_int_equal(LY_SUCCESS, lydict_insert(UTEST_LYCTX, "test1", 0, &str1));
+    assert_non_null(str1);
+    /* via zerocopy we have to get the same pointer as provided */
+    assert_non_null(str2 = strdup("test2"));
+    assert_int_equal(LY_SUCCESS, lydict_insert_zc(UTEST_LYCTX, (char *)str2, &str3));
+    assert_ptr_equal(str2, str3);
+    /* here we get the same pointer as in case the string was inserted first time */
+    assert_int_equal(LY_SUCCESS, lydict_insert(UTEST_LYCTX, "test1", 0, &str2));
+    assert_non_null(str2);
+    assert_ptr_equal(str1, str2);
+
+    /* remove strings, but the repeatedly inserted only once */
+    lydict_remove(UTEST_LYCTX, "test1");
+    lydict_remove(UTEST_LYCTX, "test2");
+
+    /* destroy dictionary - should raise warning about data presence */
+    ly_ctx_destroy(UTEST_LYCTX);
+    UTEST_LYCTX = NULL;
+    CHECK_LOG("String \"test1\" not freed from the dictionary, refcount 1", NULL);
+
+#ifndef NDEBUG
+    /* cleanup */
+    free((char *)str1);
+#endif
+}
+
+static uint8_t
+ht_equal_clb(void *val1, void *val2, uint8_t mod, void *cb_data)
+{
+    int *v1, *v2;
+
+    (void)mod;
+    (void)cb_data;
+
+    v1 = (int *)val1;
+    v2 = (int *)val2;
+
+    return *v1 == *v2;
+}
+
+static void
+test_ht_basic(void **state)
+{
+    uint32_t i;
+    struct hash_table *ht;
+
+    assert_non_null(ht = lyht_new(8, sizeof(int), ht_equal_clb, NULL, 0));
+
+    i = 2;
+    assert_int_equal(LY_ENOTFOUND, lyht_find(ht, &i, i, NULL));
+    assert_int_equal(LY_SUCCESS, lyht_insert(ht, &i, i, NULL));
+    assert_int_equal(LY_SUCCESS, lyht_find(ht, &i, i, NULL));
+    assert_int_equal(LY_SUCCESS, lyht_remove(ht, &i, i));
+    assert_int_equal(LY_ENOTFOUND, lyht_find(ht, &i, i, NULL));
+    assert_int_equal(LY_ENOTFOUND, lyht_remove(ht, &i, i));
+    CHECK_LOG("Invalid argument hash (lyht_remove_with_resize_cb()).", NULL);
+
+    lyht_free(ht);
+}
+
+static void
+test_ht_resize(void **state)
+{
+    uint32_t i;
+    struct ht_rec *rec;
+    struct hash_table *ht;
+
+    assert_non_null(ht = lyht_new(8, sizeof(int), ht_equal_clb, NULL, 1));
+    assert_int_equal(8, ht->size);
+
+    /* insert records into indexes 2-7 */
+    for (i = 2; i < 8; ++i) {
+        assert_int_equal(LY_SUCCESS, lyht_insert(ht, &i, i, NULL));
+    }
+    /* check that table resized */
+    assert_int_equal(16, ht->size);
+
+    /* check expected content of the table */
+    for (i = 0; i < 16; ++i) {
+        if ((i >= 2) && (i < 8)) {
+            /* inserted data on indexes 2-7 */
+            rec = lyht_get_rec(ht->recs, ht->rec_size, i);
+            assert_int_equal(1, rec->hits);
+            assert_int_equal(i, rec->hash);
+        } else {
+            /* nothing otherwise */
+            rec = lyht_get_rec(ht->recs, ht->rec_size, i);
+            assert_int_equal(0, rec->hits);
+        }
+    }
+
+    /* removing not present data should fail */
+    for (i = 0; i < 2; ++i) {
+        UTEST_LOG_CLEAN;
+        assert_int_equal(LY_ENOTFOUND, lyht_remove(ht, &i, i));
+        CHECK_LOG("Invalid argument hash (lyht_remove_with_resize_cb()).", NULL);
+    }
+    /* removing present data, resize should happened
+     * when we are below 25% of the table filled, so with 3 records left */
+    for ( ; i < 5; ++i) {
+        assert_int_equal(LY_SUCCESS, lyht_remove(ht, &i, i));
+    }
+    assert_int_equal(8, ht->size);
+
+    /* remove the rest */
+    for ( ; i < 8; ++i) {
+        assert_int_equal(LY_SUCCESS, lyht_remove(ht, &i, i));
+    }
+
+    for (i = 0; i < 8; ++i) {
+        assert_int_equal(LY_ENOTFOUND, lyht_find(ht, &i, i, NULL));
+    }
+
+    /* cleanup */
+    lyht_free(ht);
+}
+
+static void
+test_ht_collisions(void **UNUSED(state))
+{
+#define GET_REC_INT(rec) (*((uint32_t *)&(rec)->val))
+
+    uint32_t i;
+    struct ht_rec *rec;
+    struct hash_table *ht;
+
+    assert_non_null(ht = lyht_new(8, sizeof(int), ht_equal_clb, NULL, 1));
+
+    for (i = 2; i < 6; ++i) {
+        assert_int_equal(lyht_insert(ht, &i, 2, NULL), 0);
+    }
+
+    /* check all records */
+    for (i = 0; i < 2; ++i) {
+        rec = lyht_get_rec(ht->recs, ht->rec_size, i);
+        assert_int_equal(rec->hits, 0);
+    }
+    rec = lyht_get_rec(ht->recs, ht->rec_size, i);
+    assert_int_equal(rec->hits, 4);
+    assert_int_equal(GET_REC_INT(rec), i);
+    ++i;
+    for ( ; i < 6; ++i) {
+        rec = lyht_get_rec(ht->recs, ht->rec_size, i);
+        assert_int_equal(rec->hits, 1);
+        assert_int_equal(GET_REC_INT(rec), i);
+    }
+    for ( ; i < 8; ++i) {
+        rec = lyht_get_rec(ht->recs, ht->rec_size, i);
+        assert_int_equal(rec->hits, 0);
+    }
+
+    i = 4;
+    assert_int_equal(lyht_remove(ht, &i, 2), 0);
+
+    rec = lyht_get_rec(ht->recs, ht->rec_size, i);
+    assert_int_equal(rec->hits, -1);
+
+    i = 2;
+    assert_int_equal(lyht_remove(ht, &i, 2), 0);
+
+    /* check all records */
+    for (i = 0; i < 2; ++i) {
+        rec = lyht_get_rec(ht->recs, ht->rec_size, i);
+        assert_int_equal(rec->hits, 0);
+    }
+    rec = lyht_get_rec(ht->recs, ht->rec_size, i);
+    assert_int_equal(rec->hits, 2);
+    assert_int_equal(GET_REC_INT(rec), 5);
+    ++i;
+    rec = lyht_get_rec(ht->recs, ht->rec_size, i);
+    assert_int_equal(rec->hits, 1);
+    assert_int_equal(GET_REC_INT(rec), 3);
+    ++i;
+    for ( ; i < 6; ++i) {
+        rec = lyht_get_rec(ht->recs, ht->rec_size, i);
+        assert_int_equal(rec->hits, -1);
+    }
+    for ( ; i < 8; ++i) {
+        rec = lyht_get_rec(ht->recs, ht->rec_size, i);
+        assert_int_equal(rec->hits, 0);
+    }
+
+    for (i = 0; i < 3; ++i) {
+        assert_int_equal(lyht_find(ht, &i, 2, NULL), LY_ENOTFOUND);
+    }
+    assert_int_equal(lyht_find(ht, &i, 2, NULL), LY_SUCCESS);
+    ++i;
+    assert_int_equal(lyht_find(ht, &i, 2, NULL), LY_ENOTFOUND);
+    ++i;
+    assert_int_equal(lyht_find(ht, &i, 2, NULL), LY_SUCCESS);
+    ++i;
+    for ( ; i < 8; ++i) {
+        assert_int_equal(lyht_find(ht, &i, 2, NULL), LY_ENOTFOUND);
+    }
+
+    i = 3;
+    assert_int_equal(lyht_remove(ht, &i, 2), 0);
+    i = 5;
+    assert_int_equal(lyht_remove(ht, &i, 2), 0);
+
+    /* check all records */
+    for (i = 0; i < 2; ++i) {
+        rec = lyht_get_rec(ht->recs, ht->rec_size, i);
+        assert_int_equal(rec->hits, 0);
+    }
+    for ( ; i < 6; ++i) {
+        rec = lyht_get_rec(ht->recs, ht->rec_size, i);
+        assert_int_equal(rec->hits, -1);
+    }
+    for ( ; i < 8; ++i) {
+        rec = lyht_get_rec(ht->recs, ht->rec_size, i);
+        assert_int_equal(rec->hits, 0);
+    }
+
+    lyht_free(ht);
+}
+
+int
+main(void)
+{
+    const struct CMUnitTest tests[] = {
+        UTEST(test_invalid_arguments),
+        UTEST(test_dict_hit),
+        UTEST(test_ht_basic),
+        UTEST(test_ht_resize),
+        UTEST(test_ht_collisions),
+    };
+
+    return cmocka_run_group_tests(tests, NULL, NULL);
+}
diff --git a/tests/utests/basic/test_inout.c b/tests/utests/basic/test_inout.c
new file mode 100644
index 0000000..be27510
--- /dev/null
+++ b/tests/utests/basic/test_inout.c
@@ -0,0 +1,401 @@
+/**
+ * @file test_inout.c
+ * @author: Radek Krejci <rkrejci@cesnet.cz>
+ * @brief unit tests for input and output handlers functions
+ *
+ * Copyright (c) 2020 CESNET, z.s.p.o.
+ *
+ * This source code is licensed under BSD 3-Clause License (the "License").
+ * You may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://opensource.org/licenses/BSD-3-Clause
+ */
+#define _UTEST_MAIN_
+#include "utests.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "common.h"
+#include "in.h"
+#include "log.h"
+#include "out.h"
+
+#define TEST_INPUT_FILE TESTS_BIN "/libyang_test_input"
+#define TEST_OUTPUT_FILE TESTS_BIN "/libyang_test_output"
+#define TEST_OUTPUT_FILE2 TESTS_BIN "/libyang_test_output2"
+
+static int
+setup_files(void **state)
+{
+    int fd;
+
+    UTEST_SETUP;
+
+    /* create input */
+    fd = open(TEST_INPUT_FILE, O_CREAT | O_WRONLY, 00600);
+    if (fd == -1) {
+        return 1;
+    }
+
+    /* write something */
+    if (write(fd, "data", 4) != 4) {
+        return 1;
+    }
+    close(fd);
+
+    /* create output */
+    fd = open(TEST_OUTPUT_FILE, O_CREAT | O_RDONLY, 00600);
+    if (fd == -1) {
+        return 1;
+    }
+    close(fd);
+
+    /* create output2 */
+    fd = open(TEST_OUTPUT_FILE2, O_CREAT | O_RDONLY, 00600);
+    if (fd == -1) {
+        return 1;
+    }
+    close(fd);
+
+    return 0;
+}
+
+static int
+teardown_files(void **state)
+{
+    unlink(TEST_INPUT_FILE);
+    unlink(TEST_OUTPUT_FILE);
+    unlink(TEST_OUTPUT_FILE2);
+
+    UTEST_TEARDOWN;
+    return 0;
+}
+
+static void
+test_input_mem(void **UNUSED(state))
+{
+    struct ly_in *in = NULL;
+    char *str1 = "a", *str2 = "b";
+
+    assert_int_equal(LY_EINVAL, ly_in_new_memory(NULL, NULL));
+    assert_int_equal(LY_EINVAL, ly_in_new_memory(str1, NULL));
+    assert_null(ly_in_memory(NULL, NULL));
+
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str1, &in));
+    assert_int_equal(LY_IN_MEMORY, ly_in_type(in));
+    assert_ptr_equal(str1, ly_in_memory(in, str2));
+    assert_ptr_equal(str2, ly_in_memory(in, NULL));
+    assert_ptr_equal(str2, ly_in_memory(in, NULL));
+    ly_in_free(in, 0);
+}
+
+static void
+test_input_fd(void **UNUSED(state))
+{
+    struct ly_in *in = NULL;
+    int fd1, fd2;
+    struct stat statbuf;
+
+    assert_int_equal(LY_EINVAL, ly_in_new_fd(-1, NULL));
+    assert_int_equal(-1, ly_in_fd(NULL, -1));
+
+    assert_int_not_equal(-1, fd1 = open(TEST_INPUT_FILE, O_RDONLY));
+    assert_int_not_equal(-1, fd2 = open(TEST_INPUT_FILE, O_RDONLY));
+
+    assert_int_equal(LY_EINVAL, ly_in_new_fd(fd1, NULL));
+
+    assert_int_equal(LY_SUCCESS, ly_in_new_fd(fd1, &in));
+    assert_int_equal(LY_IN_FD, ly_in_type(in));
+    assert_ptr_equal(fd1, ly_in_fd(in, fd2));
+    assert_ptr_equal(fd2, ly_in_fd(in, -1));
+    assert_ptr_equal(fd2, ly_in_fd(in, -1));
+    ly_in_free(in, 1);
+    /* fd1 is still open */
+    assert_int_equal(0, fstat(fd1, &statbuf));
+    close(fd1);
+#ifndef _WIN32
+    /* But fd2 was closed by ly_in_free(). This results in an "invalid handler" on Windows. */
+    errno = 0;
+    assert_int_equal(-1, fstat(fd2, &statbuf));
+    assert_int_equal(errno, EBADF);
+#endif
+}
+
+static void
+test_input_file(void **UNUSED(state))
+{
+    struct ly_in *in = NULL;
+    FILE *f1 = NULL, *f2 = NULL;
+
+    assert_int_equal(LY_EINVAL, ly_in_new_file(NULL, NULL));
+    assert_null(ly_in_file(NULL, NULL));
+
+    assert_non_null(f1 = fopen(TEST_INPUT_FILE, "rb"));
+    assert_non_null(f2 = fopen(TEST_INPUT_FILE, "rb"));
+
+    assert_int_equal(LY_EINVAL, ly_in_new_file(f1, NULL));
+
+    assert_int_equal(LY_SUCCESS, ly_in_new_file(f1, &in));
+    assert_int_equal(LY_IN_FILE, ly_in_type(in));
+    assert_ptr_equal(f1, ly_in_file(in, f2));
+    assert_ptr_equal(f2, ly_in_file(in, NULL));
+    assert_ptr_equal(f2, ly_in_file(in, NULL));
+    ly_in_free(in, 1);
+    /* f1 is still open */
+    assert_int_not_equal(-1, fileno(f1));
+    fclose(f1);
+    /* but f2 was closed by ly_in_free() */
+}
+
+static void
+test_input_filepath(void **UNUSED(state))
+{
+    struct ly_in *in = NULL;
+    const char *path1 = TEST_INPUT_FILE, *path2 = TEST_INPUT_FILE;
+
+    assert_int_equal(LY_EINVAL, ly_in_new_filepath(NULL, 0, NULL));
+    assert_int_equal(LY_EINVAL, ly_in_new_filepath(path1, 0, NULL));
+    assert_ptr_equal(((void *)-1), ly_in_filepath(NULL, NULL, 0));
+
+    assert_int_equal(LY_SUCCESS, ly_in_new_filepath(path1, 0, &in));
+    assert_int_equal(LY_IN_FILEPATH, ly_in_type(in));
+    assert_ptr_equal(NULL, ly_in_filepath(in, path2, 0));
+    assert_string_equal(path2, ly_in_filepath(in, NULL, 0));
+    ly_in_free(in, 0);
+}
+
+static void
+test_output_mem(void **UNUSED(state))
+{
+    struct ly_out *out = NULL;
+    char *buf1 = NULL, *buf2 = NULL;
+
+    /* manipulate with the handler */
+    assert_int_equal(LY_SUCCESS, ly_out_new_memory(&buf1, 0, &out));
+    assert_int_equal(LY_OUT_MEMORY, ly_out_type(out));
+    ly_write(out, "test", 4);
+    assert_ptr_equal(buf1, ly_out_memory(out, &buf2, 0));
+    assert_ptr_equal(buf2, ly_out_memory(out, NULL, 0));
+    assert_ptr_equal(buf2, ly_out_memory(out, &buf1, strlen(buf1)));
+    ly_out_free(out, NULL, 0);
+
+    assert_int_equal(LY_SUCCESS, ly_out_new_memory(&buf1, strlen(buf1), &out));
+    ly_out_free(out, NULL, 1);
+
+    /* writing data */
+
+    assert_int_equal(LY_SUCCESS, ly_out_new_memory(&buf1, 0, &out));
+    assert_int_equal(LY_SUCCESS, ly_print(out, "test %s", "print"));
+    assert_int_equal(10, ly_out_printed(out));
+    assert_string_equal("test print", buf1);
+    assert_int_equal(LY_SUCCESS, ly_out_reset(out));
+    assert_int_equal(LY_SUCCESS, ly_write(out, "rewrite", 8));
+    assert_int_equal(8, ly_out_printed(out));
+    assert_string_equal("rewrite", buf1);
+    ly_out_free(out, NULL, 1);
+}
+
+static void
+test_output_fd(void **UNUSED(state))
+{
+    struct ly_out *out = NULL;
+    int fd1, fd2;
+    char buf[31] = {0};
+
+    assert_int_not_equal(-1, fd1 = open(TEST_OUTPUT_FILE, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR));
+    assert_int_not_equal(-1, fd2 = open(TEST_OUTPUT_FILE, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR));
+
+    /* manipulate with the handler */
+    assert_int_equal(LY_SUCCESS, ly_out_new_fd(fd1, &out));
+    assert_int_equal(LY_OUT_FD, ly_out_type(out));
+    assert_ptr_equal(fd1, ly_out_fd(out, fd2));
+    assert_ptr_equal(fd2, ly_out_fd(out, -1));
+    assert_ptr_equal(fd2, ly_out_fd(out, fd1));
+    ly_out_free(out, NULL, 0);
+    assert_int_equal(0, close(fd2));
+    assert_int_equal(LY_SUCCESS, ly_out_new_fd(fd1, &out));
+    ly_out_free(out, NULL, 1);
+
+    /* writing data */
+    assert_int_not_equal(-1, fd1 = open(TEST_OUTPUT_FILE, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR));
+    assert_int_not_equal(-1, fd2 = open(TEST_OUTPUT_FILE, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR));
+    /* truncate file to start with no data */
+    assert_int_equal(0, ftruncate(fd1, 0));
+
+    assert_int_equal(LY_SUCCESS, ly_out_new_fd(fd1, &out));
+    assert_int_equal(LY_SUCCESS, ly_print(out, "test %s", "print"));
+    assert_int_equal(10, ly_out_printed(out));
+    ly_print_flush(out);
+    assert_int_equal(10, read(fd2, buf, 30));
+    assert_string_equal("test print", buf);
+    assert_int_equal(0, lseek(fd2, 0, SEEK_SET));
+    assert_int_equal(LY_SUCCESS, ly_out_reset(out));
+
+    assert_int_equal(LY_SUCCESS, ly_write(out, "rewrite", 8));
+    assert_int_equal(8, ly_out_printed(out));
+    ly_print_flush(out);
+    assert_int_equal(8, read(fd2, buf, 30));
+    assert_string_equal("rewrite", buf);
+
+    close(fd2);
+    ly_out_free(out, NULL, 1);
+}
+
+static void
+test_output_file(void **UNUSED(state))
+{
+    struct ly_out *out = NULL;
+    FILE *f1, *f2;
+    char buf[31] = {0};
+
+    assert_non_null(f1 = fopen(TEST_OUTPUT_FILE, "wb"));
+    assert_non_null(f2 = fopen(TEST_OUTPUT_FILE, "wb"));
+
+    /* manipulate with the handler */
+    assert_int_equal(LY_SUCCESS, ly_out_new_file(f1, &out));
+    assert_int_equal(LY_OUT_FILE, ly_out_type(out));
+    assert_ptr_equal(f1, ly_out_file(out, f2));
+    assert_ptr_equal(f2, ly_out_file(out, NULL));
+    assert_ptr_equal(f2, ly_out_file(out, f1));
+    ly_out_free(out, NULL, 0);
+    assert_int_equal(0, fclose(f2));
+    assert_int_equal(LY_SUCCESS, ly_out_new_file(f1, &out));
+    ly_out_free(out, NULL, 1);
+
+    /* writing data */
+    assert_non_null(f1 = fopen(TEST_OUTPUT_FILE, "wb"));
+    assert_non_null(f2 = fopen(TEST_OUTPUT_FILE, "rb"));
+
+    assert_int_equal(LY_SUCCESS, ly_out_new_file(f1, &out));
+    assert_int_equal(LY_SUCCESS, ly_print(out, "test %s", "print"));
+    assert_int_equal(10, ly_out_printed(out));
+    ly_print_flush(out);
+    assert_non_null(fgets(buf, 31, f2));
+    assert_string_equal("test print", buf);
+    assert_int_equal(0, fseek(f2, 0, SEEK_SET));
+    assert_int_equal(LY_SUCCESS, ly_out_reset(out));
+
+    assert_int_equal(LY_SUCCESS, ly_write(out, "rewrite", 8));
+    assert_int_equal(8, ly_out_printed(out));
+    ly_print_flush(out);
+    assert_non_null(fgets(buf, 31, f2));
+    assert_string_equal("rewrite", buf);
+
+    fclose(f2);
+    ly_out_free(out, NULL, 1);
+}
+
+static void
+test_output_filepath(void **UNUSED(state))
+{
+    struct ly_out *out = NULL;
+    FILE *f1;
+    char buf[31] = {0};
+    const char *fp1 = TEST_OUTPUT_FILE;
+    const char *fp2 = TEST_OUTPUT_FILE2;
+
+    /* manipulate with the handler */
+    assert_int_equal(LY_SUCCESS, ly_out_new_filepath(fp1, &out));
+    assert_int_equal(LY_OUT_FILEPATH, ly_out_type(out));
+    assert_ptr_equal(NULL, ly_out_filepath(out, fp2));
+    assert_string_equal(fp2, ly_out_filepath(out, NULL));
+    assert_ptr_equal(NULL, ly_out_filepath(out, fp1));
+    ly_out_free(out, NULL, 0);
+    assert_int_equal(LY_SUCCESS, ly_out_new_filepath(fp1, &out));
+    ly_out_free(out, NULL, 1);
+
+    /* writing data */
+    assert_non_null(f1 = fopen(fp1, "rb"));
+
+    assert_int_equal(LY_SUCCESS, ly_out_new_filepath(fp1, &out));
+    assert_int_equal(LY_SUCCESS, ly_print(out, "test %s", "print"));
+    assert_int_equal(10, ly_out_printed(out));
+    ly_print_flush(out);
+    assert_non_null(fgets(buf, 31, f1));
+    assert_string_equal("test print", buf);
+    assert_int_equal(0, fseek(f1, 0, SEEK_SET));
+    assert_int_equal(LY_SUCCESS, ly_out_reset(out));
+
+    assert_int_equal(LY_SUCCESS, ly_write(out, "rewrite", 8));
+    assert_int_equal(8, ly_out_printed(out));
+    ly_print_flush(out);
+    assert_non_null(fgets(buf, 31, f1));
+    assert_string_equal("rewrite", buf);
+
+    fclose(f1);
+    ly_out_free(out, NULL, 1);
+}
+
+static ssize_t
+write_clb(void *user_data, const void *buf, size_t count)
+{
+    return write((uintptr_t)user_data, buf, count);
+}
+
+void
+close_clb(void *arg)
+{
+    close((uintptr_t)arg);
+}
+
+static void
+test_output_clb(void **UNUSED(state))
+{
+    struct ly_out *out = NULL;
+    int fd1, fd2;
+    char buf[31] = {0};
+
+    assert_int_not_equal(-1, fd1 = open(TEST_OUTPUT_FILE, O_RDWR));
+    assert_int_not_equal(-1, fd2 = open(TEST_OUTPUT_FILE, O_RDWR));
+
+    /* manipulate with the handler */
+    assert_int_equal(LY_SUCCESS, ly_out_new_clb(write_clb, (void *)(intptr_t)fd1, &out));
+    assert_int_equal(LY_OUT_CALLBACK, ly_out_type(out));
+    assert_ptr_equal(fd1, ly_out_clb_arg(out, (void *)(intptr_t)fd2));
+    assert_ptr_equal(fd2, ly_out_clb_arg(out, NULL));
+    assert_ptr_equal(fd2, ly_out_clb_arg(out, (void *)(intptr_t)fd1));
+    assert_ptr_equal(write_clb, ly_out_clb(out, write_clb));
+    ly_out_free(out, NULL, 0);
+    assert_int_equal(0, close(fd2));
+    assert_int_equal(LY_SUCCESS, ly_out_new_clb(write_clb, (void *)(intptr_t)fd1, &out));
+    ly_out_free(out, close_clb, 0);
+
+    /* writing data */
+    assert_int_not_equal(-1, fd1 = open(TEST_OUTPUT_FILE, O_RDWR));
+    assert_int_not_equal(-1, fd2 = open(TEST_OUTPUT_FILE, O_RDWR));
+    /* truncate file to start with no data */
+    assert_int_equal(0, ftruncate(fd1, 0));
+
+    assert_int_equal(LY_SUCCESS, ly_out_new_clb(write_clb, (void *)(intptr_t)fd1, &out));
+    assert_int_equal(LY_SUCCESS, ly_print(out, "test %s", "print"));
+    assert_int_equal(10, ly_out_printed(out));
+    assert_int_equal(10, read(fd2, buf, 30));
+    assert_string_equal("test print", buf);
+
+    close(fd2);
+    ly_out_free(out, close_clb, 0);
+}
+
+int
+main(void)
+{
+    const struct CMUnitTest tests[] = {
+        UTEST(test_input_mem),
+        UTEST(test_input_fd, setup_files, teardown_files),
+        UTEST(test_input_file, setup_files, teardown_files),
+        UTEST(test_input_filepath, setup_files, teardown_files),
+        UTEST(test_output_mem),
+        UTEST(test_output_fd, setup_files, teardown_files),
+        UTEST(test_output_file, setup_files, teardown_files),
+        UTEST(test_output_filepath, setup_files, teardown_files),
+        UTEST(test_output_clb, setup_files, teardown_files),
+    };
+
+    return cmocka_run_group_tests(tests, NULL, NULL);
+}
diff --git a/tests/utests/basic/test_json.c b/tests/utests/basic/test_json.c
new file mode 100644
index 0000000..1896b8a
--- /dev/null
+++ b/tests/utests/basic/test_json.c
@@ -0,0 +1,794 @@
+/*
+ * @file test_json.c
+ * @author: Radek Krejci <rkrejci@cesnet.cz>
+ * @brief unit tests for a generic JSON parser
+ *
+ * Copyright (c) 2020 CESNET, z.s.p.o.
+ *
+ * This source code is licensed under BSD 3-Clause License (the "License").
+ * You may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://opensource.org/licenses/BSD-3-Clause
+ */
+#define _UTEST_MAIN_
+#include "utests.h"
+
+#include "context.h"
+#include "in_internal.h"
+#include "json.h"
+static void
+test_general(void **state)
+{
+    struct lyjson_ctx *jsonctx;
+    struct ly_in *in;
+    const char *str;
+
+    /* empty */
+    str = "";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_END, lyjson_ctx_status(jsonctx, 0));
+    lyjson_ctx_free(jsonctx);
+
+    str = "  \n\t \n";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_END, lyjson_ctx_status(jsonctx, 0));
+    lyjson_ctx_free(jsonctx);
+
+    /* constant values */
+    str = "true";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_TRUE, lyjson_ctx_status(jsonctx, 0));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_next(jsonctx, NULL));
+    assert_int_equal(LYJSON_END, lyjson_ctx_status(jsonctx, 0));
+    lyjson_ctx_free(jsonctx);
+
+    str = "false";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_FALSE, lyjson_ctx_status(jsonctx, 0));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_next(jsonctx, NULL));
+    assert_int_equal(LYJSON_END, lyjson_ctx_status(jsonctx, 0));
+    lyjson_ctx_free(jsonctx);
+
+    str = "null";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NULL, lyjson_ctx_status(jsonctx, 0));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_next(jsonctx, NULL));
+    assert_int_equal(LYJSON_END, lyjson_ctx_status(jsonctx, 0));
+    lyjson_ctx_free(jsonctx);
+
+    ly_in_free(in, 0);
+}
+
+static void
+test_number(void **state)
+{
+    struct lyjson_ctx *jsonctx;
+    struct ly_in *in;
+    const char *str;
+
+    /* simple value */
+    str = "11";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("11", jsonctx->value);
+    assert_int_equal(2, jsonctx->value_len);
+    assert_int_equal(0, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    /* fraction number */
+    str = "37.7668";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("37.7668", jsonctx->value);
+    assert_int_equal(7, jsonctx->value_len);
+    assert_int_equal(0, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    /* negative number */
+    str = "-122.3959";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("-122.3959", jsonctx->value);
+    assert_int_equal(9, jsonctx->value_len);
+    assert_int_equal(0, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    /* integer, positive exponent */
+    str = "550E3";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("550000", jsonctx->value);
+    assert_int_equal(6, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "-550E3";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("-550000", jsonctx->value);
+    assert_int_equal(7, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    /* integer, negative exponent */
+    str = "1E-1";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("0.1", jsonctx->value);
+    assert_int_equal(3, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "15E-1";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("1.5", jsonctx->value);
+    assert_int_equal(3, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "-15E-1";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("-1.5", jsonctx->value);
+    assert_int_equal(4, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "16E-2";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("0.16", jsonctx->value);
+    assert_int_equal(4, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "-16E-2";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("-0.16", jsonctx->value);
+    assert_int_equal(5, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "17E-3";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("0.017", jsonctx->value);
+    assert_int_equal(5, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "-17E-3";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("-0.017", jsonctx->value);
+    assert_int_equal(6, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "21000E-2";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("210", jsonctx->value);
+    assert_int_equal(3, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "21000E-4";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("2.1", jsonctx->value);
+    assert_int_equal(3, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "21000E-7";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("0.0021", jsonctx->value);
+    assert_int_equal(6, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    /* decimal number, positive exponent */
+    str = "5.087E1";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("50.87", jsonctx->value);
+    assert_int_equal(5, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "-5.087E1";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("-50.87", jsonctx->value);
+    assert_int_equal(6, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "5.087E5";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("508700", jsonctx->value);
+    assert_int_equal(6, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "59.1e+1";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("591", jsonctx->value);
+    assert_int_equal(3, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "0.005087E1";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("0.05087", jsonctx->value);
+    assert_int_equal(7, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "0.005087E2";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("0.5087", jsonctx->value);
+    assert_int_equal(6, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "0.005087E6";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("5087", jsonctx->value);
+    assert_int_equal(4, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "0.05087E6";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("50870", jsonctx->value);
+    assert_int_equal(5, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "0.005087E8";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("508700", jsonctx->value);
+    assert_int_equal(6, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    /* decimal number, negative exponent */
+    str = "35.94e-1";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("3.594", jsonctx->value);
+    assert_int_equal(5, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "-35.94e-1";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("-3.594", jsonctx->value);
+    assert_int_equal(6, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "35.94e-2";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("0.3594", jsonctx->value);
+    assert_int_equal(6, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "35.94e-3";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("0.03594", jsonctx->value);
+    assert_int_equal(7, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "0.3594e-1";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("0.03594", jsonctx->value);
+    assert_int_equal(7, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "0.03594e-1";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("0.003594", jsonctx->value);
+    assert_int_equal(8, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "0.003594e-1";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("0.0003594", jsonctx->value);
+    assert_int_equal(9, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "0.3594e-2";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("0.003594", jsonctx->value);
+    assert_int_equal(8, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "0.03594e-2";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("0.0003594", jsonctx->value);
+    assert_int_equal(9, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "0.003594e-2";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("0.00003594", jsonctx->value);
+    assert_int_equal(10, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    /* zero */
+    str = "0";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_true(jsonctx->value[0] == '0');
+    assert_int_equal(1, jsonctx->value_len);
+    assert_int_equal(0, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "-0";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_true(jsonctx->value[0] == '-');
+    assert_true(jsonctx->value[1] == '0');
+    assert_int_equal(2, jsonctx->value_len);
+    assert_int_equal(0, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "94E0";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_true(jsonctx->value[0] == '9');
+    assert_true(jsonctx->value[1] == '4');
+    assert_int_equal(2, jsonctx->value_len);
+    assert_int_equal(0, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "0E2";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_true(jsonctx->value[0] == '0');
+    assert_int_equal(1, jsonctx->value_len);
+    assert_int_equal(0, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "-0E2";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_true(jsonctx->value[0] == '-');
+    assert_true(jsonctx->value[1] == '0');
+    assert_int_equal(2, jsonctx->value_len);
+    assert_int_equal(0, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "5.320e+2";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("532", jsonctx->value);
+    assert_int_equal(3, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    str = "5.320e-1";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_NUMBER, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("0.532", jsonctx->value);
+    assert_int_equal(5, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    /* various invalid inputs */
+    str = "-x";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_EVALID, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    CHECK_LOG_CTX("Invalid character in JSON Number value (\"x\").", "Line number 1.");
+
+    str = "  -";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_EVALID, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    CHECK_LOG_CTX("Unexpected end-of-input.", "Line number 1.");
+
+    str = "--1";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_EVALID, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    CHECK_LOG_CTX("Invalid character in JSON Number value (\"-\").", "Line number 1.");
+
+    str = "+1";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_EVALID, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    CHECK_LOG_CTX("Invalid character sequence \"+1\", expected a JSON value.", "Line number 1.");
+
+    str = "  1.x ";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_EVALID, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    CHECK_LOG_CTX("Invalid character in JSON Number value (\"x\").", "Line number 1.");
+
+    str = "1.";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_EVALID, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    CHECK_LOG_CTX("Unexpected end-of-input.", "Line number 1.");
+
+    str = "  1eo ";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_EVALID, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    CHECK_LOG_CTX("Invalid character in JSON Number value (\"o\").", "Line number 1.");
+
+    str = "1e";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_EVALID, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    CHECK_LOG_CTX("Unexpected end-of-input.", "Line number 1.");
+
+    str = "1E1000";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_EVALID, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    CHECK_LOG_CTX("Number encoded as a string exceeded the LY_NUMBER_MAXLEN limit.", "Line number 1.");
+
+    str = "1e9999999999999999999";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_EVALID, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    CHECK_LOG_CTX("Exponent out-of-bounds in a JSON Number value (1e9999999999999999999).", "Line number 1.");
+
+    str = "1.1e66000";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_EVALID, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    CHECK_LOG_CTX("Exponent out-of-bounds in a JSON Number value (1.1e66000).", "Line number 1.");
+
+    str = "1.1e-66000";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_EVALID, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    CHECK_LOG_CTX("Exponent out-of-bounds in a JSON Number value (1.1e-66000).", "Line number 1.");
+
+    str = "-2.1e0.";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_EVALID, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    CHECK_LOG_CTX("Unexpected character \".\" after JSON number.", "Line number 1.");
+
+    ly_in_free(in, 0);
+}
+
+/* now string is tested in file ./tests/utests/types/string.c */
+static void
+test_string(void **state)
+{
+    struct lyjson_ctx *jsonctx;
+    struct ly_in *in = NULL;
+    const char *str;
+
+    str = "";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+
+#if 0
+    /* simple string */
+    str = "\"hello\"";
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_STRING, lyjson_ctx_status(jsonctx, 0));
+    assert_ptr_equal(&str[1], jsonctx->value);
+    assert_int_equal(5, jsonctx->value_len);
+    assert_int_equal(0, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    /* 4-byte utf8 character */
+    str = "\"\\t𠜎\"";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_STRING, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("\t𠜎", jsonctx->value);
+    assert_int_equal(5, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    /* valid escape sequences - note that here it mixes valid JSON string characters (RFC 7159, sec. 7) and
+     * valid characters in YANG string type (RFC 7950, sec. 9.4). Since the latter is a subset of JSON string,
+     * the YANG string type's restrictions apply to the JSON escape sequences */
+    str = "\"\\\" \\\\ \\r \\/ \\n \\t \\u20ac\"";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_STRING, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("\" \\ \r / \n \t €", jsonctx->value);
+    assert_int_equal(15, jsonctx->value_len);
+    assert_int_equal(1, jsonctx->dynamic);
+    lyjson_ctx_free(jsonctx);
+
+    /* backspace and form feed are valid JSON escape sequences, but the control characters they represents are not allowed values for YANG string type */
+    str = "\"\\b\"";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_EVALID, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    CHECK_LOG_CTX("Invalid character reference \"\\b\" (0x00000008).", "Line number 1.");
+
+    str = "\"\\f\"";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_EVALID, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    CHECK_LOG_CTX("Invalid character reference \"\\f\" (0x0000000c).", "Line number 1.");
+#endif
+
+    /* unterminated string */
+    str = "\"unterminated string";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_EVALID, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    CHECK_LOG_CTX("Missing quotation-mark at the end of a JSON string.", "Line number 1.");
+#if 0
+    /* invalid escape sequence */
+    str = "\"char \\x \"";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_EVALID, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    CHECK_LOG_CTX("Invalid character escape sequence \\x.", "Line number 1.");
+
+    /* new line is allowed only as escaped character in JSON */
+    str = "\"\n\"";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_EVALID, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    CHECK_LOG_CTX("Invalid character in JSON string \"\n\" (0x0000000a).", "Line number 1.");
+#endif
+
+    ly_in_free(in, 0);
+}
+
+static void
+test_object(void **state)
+{
+    struct lyjson_ctx *jsonctx;
+    struct ly_in *in;
+    const char *str;
+
+    /* empty */
+    str = "  { }  ";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_OBJECT_EMPTY, lyjson_ctx_status(jsonctx, 0));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_next(jsonctx, NULL));
+    assert_int_equal(LYJSON_END, lyjson_ctx_status(jsonctx, 0));
+    lyjson_ctx_free(jsonctx);
+
+    /* simple value */
+    str = "{\"name\" : \"Radek\"}";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_OBJECT, lyjson_ctx_status(jsonctx, 0));
+    assert_ptr_equal(&str[2], jsonctx->value);
+    assert_int_equal(4, jsonctx->value_len);
+    assert_int_equal(0, jsonctx->dynamic);
+    assert_string_equal("\"Radek\"}", jsonctx->in->current);
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_next(jsonctx, NULL));
+    assert_int_equal(LYJSON_STRING, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("Radek\"}", jsonctx->value);
+    assert_int_equal(5, jsonctx->value_len);
+    assert_int_equal(0, jsonctx->dynamic);
+    assert_string_equal("}", jsonctx->in->current);
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_next(jsonctx, NULL));
+    assert_int_equal(LYJSON_OBJECT_CLOSED, lyjson_ctx_status(jsonctx, 0));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_next(jsonctx, NULL));
+    assert_int_equal(LYJSON_END, lyjson_ctx_status(jsonctx, 0));
+    lyjson_ctx_free(jsonctx);
+
+    /* two values */
+    str = "{\"smart\" : true,\"handsom\":false}";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_OBJECT, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("smart\" : true,\"handsom\":false}", jsonctx->value);
+    assert_int_equal(5, jsonctx->value_len);
+    assert_int_equal(0, jsonctx->dynamic);
+    assert_string_equal("true,\"handsom\":false}", jsonctx->in->current);
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_next(jsonctx, NULL));
+    assert_int_equal(LYJSON_TRUE, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal(",\"handsom\":false}", jsonctx->in->current);
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_next(jsonctx, NULL));
+    assert_int_equal(LYJSON_OBJECT, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("handsom\":false}", jsonctx->value);
+    assert_int_equal(7, jsonctx->value_len);
+    assert_int_equal(0, jsonctx->dynamic);
+    assert_string_equal("false}", jsonctx->in->current);
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_next(jsonctx, NULL));
+    assert_int_equal(LYJSON_FALSE, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("}", jsonctx->in->current);
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_next(jsonctx, NULL));
+    assert_int_equal(LYJSON_OBJECT_CLOSED, lyjson_ctx_status(jsonctx, 0));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_next(jsonctx, NULL));
+    assert_int_equal(LYJSON_END, lyjson_ctx_status(jsonctx, 0));
+    lyjson_ctx_free(jsonctx);
+
+    /* inherited objects */
+    str = "{\"person\" : {\"name\":\"Radek\"}}";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_OBJECT, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("person\" : {\"name\":\"Radek\"}}", jsonctx->value);
+    assert_int_equal(6, jsonctx->value_len);
+    assert_int_equal(0, jsonctx->dynamic);
+    assert_string_equal("{\"name\":\"Radek\"}}", jsonctx->in->current);
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_next(jsonctx, NULL));
+    assert_int_equal(LYJSON_OBJECT, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("name\":\"Radek\"}}", jsonctx->value);
+    assert_int_equal(4, jsonctx->value_len);
+    assert_int_equal(0, jsonctx->dynamic);
+    assert_string_equal("\"Radek\"}}", jsonctx->in->current);
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_next(jsonctx, NULL));
+    assert_int_equal(LYJSON_STRING, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("Radek\"}}", jsonctx->value);
+    assert_int_equal(5, jsonctx->value_len);
+    assert_int_equal(0, jsonctx->dynamic);
+    assert_string_equal("}}", jsonctx->in->current);
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_next(jsonctx, NULL));
+    assert_int_equal(LYJSON_OBJECT_CLOSED, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("}", jsonctx->in->current);
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_next(jsonctx, NULL));
+    assert_int_equal(LYJSON_OBJECT_CLOSED, lyjson_ctx_status(jsonctx, 0));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_next(jsonctx, NULL));
+    assert_int_equal(LYJSON_END, lyjson_ctx_status(jsonctx, 0));
+    lyjson_ctx_free(jsonctx);
+
+    /* new line is allowed only as escaped character in JSON */
+    str = "{ unquoted : \"data\"}";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_EVALID, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    CHECK_LOG_CTX("Invalid character sequence \"unquoted : \"data\"}\", expected a JSON object's member.", "Line number 1.");
+
+    ly_in_free(in, 0);
+}
+
+static void
+test_array(void **state)
+{
+    struct lyjson_ctx *jsonctx;
+    struct ly_in *in;
+    const char *str;
+
+    /* empty */
+    str = "  [  ]  ";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_ARRAY_EMPTY, lyjson_ctx_status(jsonctx, 0));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_next(jsonctx, NULL));
+    assert_int_equal(LYJSON_END, lyjson_ctx_status(jsonctx, 0));
+    lyjson_ctx_free(jsonctx);
+
+    /* simple value */
+    str = "[ null]";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_ARRAY, lyjson_ctx_status(jsonctx, 0));
+    assert_null(jsonctx->value);
+    assert_int_equal(0, jsonctx->value_len);
+    assert_int_equal(0, jsonctx->dynamic);
+    assert_string_equal("null]", jsonctx->in->current);
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_next(jsonctx, NULL));
+    assert_int_equal(LYJSON_NULL, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("]", jsonctx->in->current);
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_next(jsonctx, NULL));
+    assert_int_equal(LYJSON_ARRAY_CLOSED, lyjson_ctx_status(jsonctx, 0));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_next(jsonctx, NULL));
+    assert_int_equal(LYJSON_END, lyjson_ctx_status(jsonctx, 0));
+    lyjson_ctx_free(jsonctx);
+
+    /* two values */
+    str = "[{\"a\":null},\"x\"]";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LYJSON_ARRAY, lyjson_ctx_status(jsonctx, 0));
+    assert_null(jsonctx->value);
+    assert_int_equal(0, jsonctx->value_len);
+    assert_int_equal(0, jsonctx->dynamic);
+    assert_string_equal("{\"a\":null},\"x\"]", jsonctx->in->current);
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_next(jsonctx, NULL));
+    assert_int_equal(LYJSON_OBJECT, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("a\":null},\"x\"]", jsonctx->value);
+    assert_int_equal(1, jsonctx->value_len);
+    assert_int_equal(0, jsonctx->dynamic);
+    assert_string_equal("null},\"x\"]", jsonctx->in->current);
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_next(jsonctx, NULL));
+    assert_int_equal(LYJSON_NULL, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("},\"x\"]", jsonctx->in->current);
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_next(jsonctx, NULL));
+    assert_int_equal(LYJSON_OBJECT_CLOSED, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal(",\"x\"]", jsonctx->in->current);
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_next(jsonctx, NULL));
+    assert_int_equal(LYJSON_STRING, lyjson_ctx_status(jsonctx, 0));
+    assert_string_equal("x\"]", jsonctx->value);
+    assert_int_equal(1, jsonctx->value_len);
+    assert_int_equal(0, jsonctx->dynamic);
+    assert_string_equal("]", jsonctx->in->current);
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_next(jsonctx, NULL));
+    assert_int_equal(LYJSON_ARRAY_CLOSED, lyjson_ctx_status(jsonctx, 0));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_next(jsonctx, NULL));
+    assert_int_equal(LYJSON_END, lyjson_ctx_status(jsonctx, 0));
+    lyjson_ctx_free(jsonctx);
+
+    /* new line is allowed only as escaped character in JSON */
+    str = "[ , null]";
+    assert_non_null(ly_in_memory(in, str));
+    assert_int_equal(LY_SUCCESS, lyjson_ctx_new(UTEST_LYCTX, in, 0, &jsonctx));
+    assert_int_equal(LY_EVALID, lyjson_ctx_next(jsonctx, NULL));
+    CHECK_LOG_CTX("Invalid character sequence \", null]\", expected a JSON value.", "Line number 1.");
+    lyjson_ctx_free(jsonctx);
+
+    ly_in_free(in, 0);
+}
+
+int
+main(void)
+{
+    const struct CMUnitTest tests[] = {
+        UTEST(test_general),
+        UTEST(test_number),
+        UTEST(test_string),
+        UTEST(test_object),
+        UTEST(test_array),
+    };
+
+    return cmocka_run_group_tests(tests, NULL, NULL);
+}
diff --git a/tests/utests/basic/test_plugins.c b/tests/utests/basic/test_plugins.c
new file mode 100644
index 0000000..7f3fe40
--- /dev/null
+++ b/tests/utests/basic/test_plugins.c
@@ -0,0 +1,109 @@
+/*
+ * @file test_plugins.c
+ * @author: Radek Krejci <rkrejci@cesnet.cz>
+ * @brief unit tests for functions from set.c
+ *
+ * Copyright (c) 2018 CESNET, z.s.p.o.
+ *
+ * This source code is licensed under BSD 3-Clause License (the "License").
+ * You may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://opensource.org/licenses/BSD-3-Clause
+ */
+#define _UTEST_MAIN_
+#include "utests.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "config.h"
+#include "plugins.h"
+#include "plugins_internal.h"
+
+const char *simple = "module libyang-plugins-simple {"
+        "  namespace urn:libyang:tests:plugins:simple;"
+        "  prefix s;"
+        "  typedef note { type string; }"
+        "  extension hint { argument value; }"
+        "  leaf test {"
+        "    type s:note {length 255;}"
+        "    s:hint \"some hint here\";"
+        "  }"
+        "}";
+
+static void
+test_add_invalid(void **state)
+{
+    (void)state;
+    assert_int_equal(LY_ESYS, lyplg_add(TESTS_BIN "/plugins/plugin_does_not_exist" LYPLG_SUFFIX));
+}
+
+static void
+test_add_simple(void **state)
+{
+    struct lys_module *mod;
+    struct lysc_node_leaf *leaf;
+    struct lyplg_ext_record *record_e;
+    struct lyplg_type *plugin_t;
+
+    assert_int_equal(LY_SUCCESS, lyplg_add(TESTS_BIN "/plugins/plugin_simple" LYPLG_SUFFIX));
+
+    UTEST_ADD_MODULE(simple, LYS_IN_YANG, NULL, &mod);
+
+    leaf = (struct lysc_node_leaf *)mod->compiled->data;
+    assert_int_equal(LYS_LEAF, leaf->nodetype);
+
+    assert_non_null(plugin_t = lyplg_type_plugin_find("libyang-plugins-simple", NULL, "note"));
+    assert_string_equal("ly2 simple test v1", plugin_t->id);
+    assert_ptr_equal(leaf->type->plugin, plugin_t);
+
+    assert_int_equal(1, LY_ARRAY_COUNT(leaf->exts));
+    assert_non_null(record_e = lyplg_ext_record_find("libyang-plugins-simple", NULL, "hint"));
+    assert_string_equal("ly2 simple test v1", record_e->plugin.id);
+    assert_ptr_equal(leaf->exts[0].def->plugin, &record_e->plugin);
+
+    /* the second loading of the same plugin - still success */
+    assert_int_equal(LY_SUCCESS, lyplg_add(TESTS_BIN "/plugins/plugin_simple" LYPLG_SUFFIX));
+}
+
+static void
+test_not_implemented(void **state)
+{
+    struct lys_module *mod;
+    struct lyd_node *tree;
+    const char *schema = "module libyang-plugins-unknown {"
+            "  namespace urn:libyang:tests:plugins:unknown;"
+            "  prefix u;"
+            "  extension myext;"
+            "  typedef mytype { type string;}"
+            "  leaf test {"
+            "    u:myext;"
+            "    type mytype;"
+            "  }"
+            "}";
+    const char *data = "<test xmlns=\"urn:libyang:tests:plugins:unknown\">xxx</test>";
+    char *printed = NULL;
+
+    UTEST_ADD_MODULE(schema, LYS_IN_YANG, NULL, &mod);
+
+    assert_int_equal(LY_SUCCESS, lys_print_mem(&printed, mod, LYS_OUT_YANG_COMPILED, 0));
+    free(printed);
+
+    assert_int_equal(LY_SUCCESS, lyd_parse_data_mem(UTEST_LYCTX, data, LYD_XML, 0, LYD_VALIDATE_PRESENT, &tree));
+    CHECK_LOG_CTX(NULL, NULL);
+
+    lyd_free_all(tree);
+}
+
+int
+main(void)
+{
+    const struct CMUnitTest tests[] = {
+        UTEST(test_add_invalid),
+        UTEST(test_add_simple),
+        UTEST(test_not_implemented),
+    };
+
+    return cmocka_run_group_tests(tests, NULL, NULL);
+}
diff --git a/tests/utests/basic/test_set.c b/tests/utests/basic/test_set.c
new file mode 100644
index 0000000..af39afa
--- /dev/null
+++ b/tests/utests/basic/test_set.c
@@ -0,0 +1,287 @@
+/*
+ * @file test_set.c
+ * @author: Radek Krejci <rkrejci@cesnet.cz>
+ * @brief unit tests for functions from set.c
+ *
+ * Copyright (c) 2018 CESNET, z.s.p.o.
+ *
+ * This source code is licensed under BSD 3-Clause License (the "License").
+ * You may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://opensource.org/licenses/BSD-3-Clause
+ */
+#define _POSIX_C_SOURCE 200809L /* strdup */
+#define _UTEST_MAIN_
+#include "utests.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "set.h"
+
+static void
+test_basics(void **UNUSED(state))
+{
+    struct ly_set *set;
+    char *str;
+    unsigned int u;
+    void *ptr;
+    uint32_t index;
+
+    /* creation - everything is empty */
+    assert_int_equal(LY_SUCCESS, ly_set_new(&set));
+    assert_non_null(set);
+    assert_int_equal(0, set->count);
+    assert_int_equal(0, set->size);
+    assert_null(set->objs);
+
+    /* add a testing object */
+    str = strdup("test string");
+    assert_non_null(str);
+
+    assert_int_equal(LY_SUCCESS, ly_set_add(set, str, 0, NULL));
+    assert_int_not_equal(0, set->size);
+    assert_int_equal(1, set->count);
+    assert_non_null(set->objs);
+    assert_non_null(set->objs[0]);
+
+    /* check the presence of the testing data */
+    assert_int_equal(1, ly_set_contains(set, str, &index));
+    assert_int_equal(0, index);
+    assert_int_equal(0, ly_set_contains(set, str - 1, NULL));
+
+    /* remove data, but keep the set */
+    u = set->size;
+    ptr = set->objs;
+    ly_set_clean(set, free);
+    assert_int_equal(0, set->count);
+    assert_int_equal(u, set->size);
+    assert_ptr_equal(ptr, set->objs);
+
+    /* remove buffer, but keep the set object */
+    ly_set_erase(set, NULL);
+    assert_int_equal(0, set->count);
+    assert_int_equal(0, set->size);
+    assert_ptr_equal(NULL, set->objs);
+
+    /* final cleanup */
+    ly_set_free(set, NULL);
+}
+
+static void
+test_inval(void **state)
+{
+    struct ly_set set;
+
+    memset(&set, 0, sizeof set);
+
+    ly_set_clean(NULL, NULL);
+    CHECK_LOG(NULL, NULL);
+
+    ly_set_erase(NULL, NULL);
+    CHECK_LOG(NULL, NULL);
+
+    ly_set_free(NULL, NULL);
+    CHECK_LOG(NULL, NULL);
+
+    assert_int_equal(LY_EINVAL, ly_set_dup(NULL, NULL, NULL));
+    CHECK_LOG("Invalid argument set (ly_set_dup()).", NULL);
+
+    assert_int_equal(LY_EINVAL, ly_set_add(NULL, NULL, 0, NULL));
+    CHECK_LOG("Invalid argument set (ly_set_add()).", NULL);
+
+    assert_int_equal(LY_EINVAL, ly_set_merge(NULL, NULL, 0, NULL));
+    CHECK_LOG("Invalid argument trg (ly_set_merge()).", NULL);
+    assert_int_equal(LY_SUCCESS, ly_set_merge(&set, NULL, 0, NULL));
+
+    assert_int_equal(LY_EINVAL, ly_set_rm_index(NULL, 0, NULL));
+    CHECK_LOG("Invalid argument set (ly_set_rm_index()).", NULL);
+    assert_int_equal(LY_EINVAL, ly_set_rm_index(&set, 1, NULL));
+    CHECK_LOG("Invalid argument index (ly_set_rm_index()).", NULL);
+
+    assert_int_equal(LY_EINVAL, ly_set_rm(NULL, NULL, NULL));
+    CHECK_LOG("Invalid argument set (ly_set_rm()).", NULL);
+    assert_int_equal(LY_EINVAL, ly_set_rm(&set, NULL, NULL));
+    CHECK_LOG("Invalid argument object (ly_set_rm()).", NULL);
+    assert_int_equal(LY_EINVAL, ly_set_rm(&set, &set, NULL));
+    CHECK_LOG("Invalid argument object (ly_set_rm()).", NULL);
+}
+
+static void
+test_duplication(void **UNUSED(state))
+{
+    struct ly_set *orig, *new;
+    char *str;
+    uint32_t index;
+
+    assert_int_equal(LY_SUCCESS, ly_set_new(&orig));
+    assert_non_null(orig);
+
+    /* add a testing object */
+    str = strdup("test string");
+    assert_non_null(str);
+    assert_int_equal(LY_SUCCESS, ly_set_add(orig, str, 0, &index));
+    assert_int_equal(0, index);
+
+    /* duplicate the set - without duplicator, so the new set will point to the same string */
+    assert_int_equal(LY_SUCCESS, ly_set_dup(orig, NULL, &new));
+    assert_non_null(new);
+    assert_ptr_not_equal(orig, new);
+    assert_int_equal(orig->count, new->count);
+    assert_ptr_equal(orig->objs[0], new->objs[0]);
+
+    ly_set_free(new, NULL);
+
+    /* duplicate the set - with duplicator, so the new set will point to a different buffer with the same content */
+    assert_int_equal(LY_SUCCESS, ly_set_dup(orig, (void *(*)(const void *))strdup, &new));
+    assert_non_null(new);
+    assert_ptr_not_equal(orig, new);
+    assert_int_equal(orig->count, new->count);
+    assert_ptr_not_equal(orig->objs[0], new->objs[0]);
+    assert_string_equal(orig->objs[0], new->objs[0]);
+
+    /* cleanup */
+    ly_set_free(new, free);
+    ly_set_free(orig, free);
+}
+
+static void
+test_add(void **UNUSED(state))
+{
+    uint32_t u, index;
+    char *str = "test string";
+    struct ly_set set;
+
+    memset(&set, 0, sizeof set);
+
+    /* add a testing object */
+    assert_int_equal(LY_SUCCESS, ly_set_add(&set, str, 0, &index));
+    assert_int_equal(0, index);
+
+    /* test avoiding data duplicities */
+    assert_int_equal(LY_SUCCESS, ly_set_add(&set, str, 0, &index));
+    assert_int_equal(0, index);
+    assert_int_equal(1, set.count);
+    assert_int_equal(LY_SUCCESS, ly_set_add(&set, str, 1, &index));
+    assert_int_equal(1, index);
+    assert_int_equal(2, set.count);
+
+    /* test array resizing */
+    u = set.size;
+    for (uint32_t expected_index = 2; expected_index <= u; ++expected_index) {
+        assert_int_equal(LY_SUCCESS, ly_set_add(&set, str, 1, &index));
+        assert_int_equal(expected_index, index);
+    }
+    assert_true(u != set.size);
+
+    /* cleanup */
+    ly_set_erase(&set, NULL);
+}
+
+static void
+test_merge(void **UNUSED(state))
+{
+    char *str1, *str2;
+    struct ly_set one, two;
+
+    memset(&one, 0, sizeof one);
+    memset(&two, 0, sizeof two);
+
+    str1 = strdup("string1");
+    str2 = strdup("string2");
+
+    /* fill first set
+     * - str1 is the same as in two, so it must not be freed! */
+    assert_int_equal(LY_SUCCESS, ly_set_add(&one, str1, 0, NULL));
+
+    /* fill second set */
+    assert_int_equal(LY_SUCCESS, ly_set_add(&two, str1, 0, NULL));
+    assert_int_equal(LY_SUCCESS, ly_set_add(&two, str2, 0, NULL));
+
+    /* merge with checking duplicities - only one item is added into one;
+     * also without duplicating data, so it must not be freed at the end */
+    assert_int_equal(LY_SUCCESS, ly_set_merge(&one, &two, 0, NULL));
+    assert_int_equal(2, one.count);
+    assert_ptr_equal(one.objs[1], two.objs[1]);
+
+    /* clean and re-fill one (now duplicating str1, to allow testing duplicator) */
+    ly_set_clean(&one, NULL);
+    assert_int_equal(LY_SUCCESS, ly_set_add(&one, strdup(str1), 0, NULL));
+
+    /* merge without checking duplicities - two items are added into one;
+     * here also with duplicator */
+    assert_int_equal(LY_SUCCESS, ly_set_merge(&one, &two, 1, (void *(*)(const void *))strdup));
+    assert_int_equal(3, one.count);
+    assert_ptr_not_equal(one.objs[1], two.objs[0]);
+    assert_string_equal(one.objs[1], two.objs[0]);
+
+    /* cleanup */
+    ly_set_erase(&one, free);
+    ly_set_erase(&two, free);
+}
+
+static void
+test_rm(void **UNUSED(state))
+{
+    char *str1, *str2, *str3;
+    struct ly_set set;
+
+    memset(&set, 0, sizeof set);
+
+    /* fill the set */
+    assert_int_equal(LY_SUCCESS, ly_set_add(&set, "string1", 0, NULL));
+    assert_int_equal(LY_SUCCESS, ly_set_add(&set, strdup("string2"), 0, NULL));
+    assert_int_equal(LY_SUCCESS, ly_set_add(&set, "string3", 0, NULL));
+
+    /* remove by index ... */
+    /* ... in the middle ... */
+    assert_int_equal(LY_SUCCESS, ly_set_rm_index(&set, 1, free));
+    assert_int_equal(2, set.count);
+    assert_string_not_equal("string2", set.objs[0]);
+    assert_string_not_equal("string2", set.objs[1]);
+    /* ... last .. */
+    assert_int_equal(LY_SUCCESS, ly_set_rm_index(&set, 1, NULL));
+    assert_int_equal(1, set.count);
+    assert_string_not_equal("string3", set.objs[0]);
+    /* ... first .. */
+    assert_int_equal(LY_SUCCESS, ly_set_rm_index(&set, 0, NULL));
+    assert_int_equal(0, set.count);
+
+    /* fill the set */
+    assert_int_equal(LY_SUCCESS, ly_set_add(&set, str1 = "string1", 0, NULL));
+    assert_int_equal(LY_SUCCESS, ly_set_add(&set, str2 = "string2", 0, NULL));
+    assert_int_equal(LY_SUCCESS, ly_set_add(&set, str3 = strdup("string3"), 0, NULL));
+
+    /* remove by pointer ... */
+    /* ... in the middle ... */
+    assert_int_equal(LY_SUCCESS, ly_set_rm(&set, str2, NULL));
+    assert_int_equal(2, set.count);
+    assert_string_not_equal("string2", set.objs[0]);
+    assert_string_not_equal("string2", set.objs[1]);
+    /* ... last (with destructor) .. */
+    assert_int_equal(LY_SUCCESS, ly_set_rm(&set, str3, free));
+    assert_int_equal(1, set.count);
+    assert_string_not_equal("string3", set.objs[0]);
+    /* ... first .. */
+    assert_int_equal(LY_SUCCESS, ly_set_rm(&set, str1, NULL));
+    assert_int_equal(0, set.count);
+
+    /* cleanup */
+    ly_set_erase(&set, NULL);
+}
+
+int
+main(void)
+{
+    const struct CMUnitTest tests[] = {
+        UTEST(test_basics),
+        UTEST(test_duplication),
+        UTEST(test_add),
+        UTEST(test_merge),
+        UTEST(test_rm),
+        UTEST(test_inval),
+    };
+
+    return cmocka_run_group_tests(tests, NULL, NULL);
+}
diff --git a/tests/utests/basic/test_xml.c b/tests/utests/basic/test_xml.c
new file mode 100644
index 0000000..668de4b
--- /dev/null
+++ b/tests/utests/basic/test_xml.c
@@ -0,0 +1,690 @@
+/*
+ * @file test_xml.c
+ * @author: Radek Krejci <rkrejci@cesnet.cz>
+ * @brief unit tests for functions from xml.c
+ *
+ * Copyright (c) 2018 CESNET, z.s.p.o.
+ *
+ * This source code is licensed under BSD 3-Clause License (the "License").
+ * You may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://opensource.org/licenses/BSD-3-Clause
+ */
+#define _UTEST_MAIN_
+#include "utests.h"
+
+#define _POSIX_C_SOURCE 200809L /* strdup */
+
+#include <string.h>
+
+#include "context.h"
+#include "in_internal.h"
+#include "xml.h"
+
+LY_ERR lyxml_ns_add(struct lyxml_ctx *xmlctx, const char *prefix, size_t prefix_len, char *uri);
+
+static void
+test_element(void **state)
+{
+    struct lyxml_ctx *xmlctx;
+    struct ly_in *in;
+    const char *str;
+
+    /* empty */
+    str = "";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_new(UTEST_LYCTX, in, &xmlctx));
+    assert_int_equal(LYXML_END, xmlctx->status);
+    lyxml_ctx_free(xmlctx);
+    ly_in_free(in, 0);
+
+    /* end element */
+    str = "</element>";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+    assert_int_equal(LY_EVALID, lyxml_ctx_new(UTEST_LYCTX, in, &xmlctx));
+    CHECK_LOG_CTX("Stray closing element tag (\"element\").", "Line number 1.");
+    ly_in_free(in, 0);
+
+    /* no element */
+    UTEST_LOG_CLEAN;
+    str = "no data present";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+    assert_int_equal(LY_EVALID, lyxml_ctx_new(UTEST_LYCTX, in, &xmlctx));
+    CHECK_LOG_CTX("Invalid character sequence \"no data present\", expected element tag start ('<').", "Line number 1.");
+    ly_in_free(in, 0);
+
+    /* not supported DOCTYPE */
+    str = "<!DOCTYPE greeting SYSTEM \"hello.dtd\"><greeting/>";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+    assert_int_equal(LY_EVALID, lyxml_ctx_new(UTEST_LYCTX, in, &xmlctx));
+    CHECK_LOG_CTX("Document Type Declaration not supported.", "Line number 1.");
+    ly_in_free(in, 0);
+
+    /* invalid XML */
+    str = "<!NONSENSE/>";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+    assert_int_equal(LY_EVALID, lyxml_ctx_new(UTEST_LYCTX, in, &xmlctx));
+    CHECK_LOG_CTX("Unknown XML section \"<!NONSENSE/>\".", "Line number 1.");
+    ly_in_free(in, 0);
+
+    /* namespace ambiguity */
+    str = "<element xmlns=\"urn1\" xmlns=\"urn2\"/>";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+    assert_int_equal(LY_EVALID, lyxml_ctx_new(UTEST_LYCTX, in, &xmlctx));
+    CHECK_LOG_CTX("Duplicate default XML namespaces \"urn1\" and \"urn2\".", "Line number 1.");
+    ly_in_free(in, 0);
+
+    /* prefix duplicate */
+    str = "<element xmlns:a=\"urn1\" xmlns:a=\"urn2\"/>";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+    assert_int_equal(LY_EVALID, lyxml_ctx_new(UTEST_LYCTX, in, &xmlctx));
+    CHECK_LOG_CTX("Duplicate XML NS prefix \"a\" used for namespaces \"urn1\" and \"urn2\".", "Line number 1.");
+    ly_in_free(in, 0);
+
+    /* unqualified element */
+    str = "  <  element/>";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_new(UTEST_LYCTX, in, &xmlctx));
+    assert_int_equal(LYXML_ELEMENT, xmlctx->status);
+    assert_null(xmlctx->prefix);
+    assert_true(!strncmp("element", xmlctx->name, xmlctx->name_len));
+    assert_int_equal(1, xmlctx->elements.count);
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ELEM_CONTENT, xmlctx->status);
+    assert_true(!strncmp("", xmlctx->value, xmlctx->value_len));
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ELEM_CLOSE, xmlctx->status);
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_END, xmlctx->status);
+    lyxml_ctx_free(xmlctx);
+    ly_in_free(in, 0);
+
+    /* element with attribute */
+    str = "  <  element attr=\'x\'/>";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_new(UTEST_LYCTX, in, &xmlctx));
+    assert_int_equal(LYXML_ELEMENT, xmlctx->status);
+    assert_true(!strncmp("element", xmlctx->name, xmlctx->name_len));
+    assert_null(xmlctx->prefix);
+    assert_int_equal(1, xmlctx->elements.count);
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ATTRIBUTE, xmlctx->status);
+    assert_true(!strncmp("attr", xmlctx->name, xmlctx->name_len));
+    assert_null(xmlctx->prefix);
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ATTR_CONTENT, xmlctx->status);
+    assert_int_equal(1, xmlctx->elements.count);
+    assert_true(!strncmp("x", xmlctx->value, xmlctx->value_len));
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ELEM_CONTENT, xmlctx->status);
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ELEM_CLOSE, xmlctx->status);
+    assert_int_equal(0, xmlctx->elements.count);
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_END, xmlctx->status);
+    lyxml_ctx_free(xmlctx);
+    ly_in_free(in, 0);
+
+    /* headers and comments */
+    str = "<?xml version=\"1.0\"?>  <!-- comment --> <?TEST xxx?> <element/>";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_new(UTEST_LYCTX, in, &xmlctx));
+    assert_int_equal(LYXML_ELEMENT, xmlctx->status);
+    assert_true(!strncmp("element", xmlctx->name, xmlctx->name_len));
+    assert_null(xmlctx->prefix);
+    assert_int_equal(1, xmlctx->elements.count);
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ELEM_CONTENT, xmlctx->status);
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ELEM_CLOSE, xmlctx->status);
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_END, xmlctx->status);
+    lyxml_ctx_free(xmlctx);
+    ly_in_free(in, 0);
+
+    /* separate opening and closing tags, neamespaced parsed internally */
+    str = "<element xmlns=\"urn\"></element>";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_new(UTEST_LYCTX, in, &xmlctx));
+    assert_int_equal(LYXML_ELEMENT, xmlctx->status);
+    assert_true(!strncmp("element", xmlctx->name, xmlctx->name_len));
+    assert_null(xmlctx->prefix);
+    assert_int_equal(1, xmlctx->elements.count);
+    assert_int_equal(1, xmlctx->ns.count);
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ELEM_CONTENT, xmlctx->status);
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ELEM_CLOSE, xmlctx->status);
+    assert_int_equal(0, xmlctx->elements.count);
+    assert_int_equal(0, xmlctx->ns.count);
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_END, xmlctx->status);
+    lyxml_ctx_free(xmlctx);
+    ly_in_free(in, 0);
+
+    /* qualified element */
+    str = "  <  yin:element/>";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_new(UTEST_LYCTX, in, &xmlctx));
+    assert_int_equal(LYXML_ELEMENT, xmlctx->status);
+    assert_true(!strncmp("element", xmlctx->name, xmlctx->name_len));
+    assert_true(!strncmp("yin", xmlctx->prefix, xmlctx->prefix_len));
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ELEM_CONTENT, xmlctx->status);
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ELEM_CLOSE, xmlctx->status);
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_END, xmlctx->status);
+    lyxml_ctx_free(xmlctx);
+    ly_in_free(in, 0);
+
+    /* non-matching closing tag */
+    str = "<yin:element xmlns=\"urn\"></element>";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_new(UTEST_LYCTX, in, &xmlctx));
+    assert_int_equal(LYXML_ELEMENT, xmlctx->status);
+    assert_true(!strncmp("element", xmlctx->name, xmlctx->name_len));
+    assert_true(!strncmp("yin", xmlctx->prefix, xmlctx->prefix_len));
+    assert_int_equal(1, xmlctx->elements.count);
+    assert_int_equal(1, xmlctx->ns.count);
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ELEM_CONTENT, xmlctx->status);
+
+    assert_int_equal(LY_EVALID, lyxml_ctx_next(xmlctx));
+    CHECK_LOG_CTX("Opening (\"yin:element\") and closing (\"element\") elements tag mismatch.", "Line number 1.");
+    lyxml_ctx_free(xmlctx);
+    ly_in_free(in, 0);
+
+    /* invalid closing tag */
+    str = "<yin:element xmlns=\"urn\"></yin:element/>";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_new(UTEST_LYCTX, in, &xmlctx));
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LY_EVALID, lyxml_ctx_next(xmlctx));
+    CHECK_LOG_CTX("Invalid character sequence \"/>\", expected element tag termination ('>').", "Line number 1.");
+    lyxml_ctx_free(xmlctx);
+    ly_in_free(in, 0);
+
+    /* UTF8 characters */
+    str = "<𠜎€𠜎Øn:𠜎€𠜎Øn/>";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_new(UTEST_LYCTX, in, &xmlctx));
+    assert_true(!strncmp("𠜎€𠜎Øn", xmlctx->name, xmlctx->name_len));
+    assert_true(!strncmp("𠜎€𠜎Øn", xmlctx->prefix, xmlctx->prefix_len));
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ELEM_CONTENT, xmlctx->status);
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ELEM_CLOSE, xmlctx->status);
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_END, xmlctx->status);
+    lyxml_ctx_free(xmlctx);
+    ly_in_free(in, 0);
+
+    /* invalid UTF-8 characters */
+    str = "<¢:element>";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+    assert_int_equal(LY_EVALID, lyxml_ctx_new(UTEST_LYCTX, in, &xmlctx));
+    CHECK_LOG_CTX("Identifier \"¢:element>\" starts with an invalid character.", "Line number 1.");
+    ly_in_free(in, 0);
+
+    str = "<yin:c⁐element>";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_new(UTEST_LYCTX, in, &xmlctx));
+    assert_int_equal(LY_EVALID, lyxml_ctx_next(xmlctx));
+    CHECK_LOG_CTX("Invalid character sequence \"⁐element>\", expected element tag end ('>' or '/>') or an attribute.", "Line number 1.");
+    lyxml_ctx_free(xmlctx);
+    ly_in_free(in, 0);
+
+    /* mixed content */
+    str = "<a>text <b>x</b></a>";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_new(UTEST_LYCTX, in, &xmlctx));
+    assert_int_equal(LYXML_ELEMENT, xmlctx->status);
+    assert_true(!strncmp("a", xmlctx->name, xmlctx->name_len));
+    assert_null(xmlctx->prefix);
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ELEM_CONTENT, xmlctx->status);
+    assert_true(!strncmp("text ", xmlctx->value, xmlctx->value_len));
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ELEMENT, xmlctx->status);
+    assert_true(!strncmp("b", xmlctx->name, xmlctx->name_len));
+    assert_null(xmlctx->prefix);
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ELEM_CONTENT, xmlctx->status);
+    assert_true(!strncmp("x", xmlctx->value, xmlctx->value_len));
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ELEM_CLOSE, xmlctx->status);
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ELEM_CLOSE, xmlctx->status);
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_END, xmlctx->status);
+    lyxml_ctx_free(xmlctx);
+    ly_in_free(in, 0);
+
+    /* tag mismatch */
+    str = "<a>text</b>";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_new(UTEST_LYCTX, in, &xmlctx));
+    assert_int_equal(LYXML_ELEMENT, xmlctx->status);
+    assert_true(!strncmp("a", xmlctx->name, xmlctx->name_len));
+    assert_null(xmlctx->prefix);
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ELEM_CONTENT, xmlctx->status);
+    assert_true(!strncmp("text", xmlctx->value, xmlctx->value_len));
+
+    assert_int_equal(LY_EVALID, lyxml_ctx_next(xmlctx));
+    CHECK_LOG_CTX("Opening (\"a\") and closing (\"b\") elements tag mismatch.", "Line number 1.");
+    lyxml_ctx_free(xmlctx);
+    ly_in_free(in, 0);
+}
+
+static void
+test_attribute(void **state)
+{
+    const char *str;
+    struct lyxml_ctx *xmlctx;
+    struct ly_in *in;
+    struct lyxml_ns *ns;
+
+    /* not an attribute */
+    str = "<e unknown/>";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+    assert_int_equal(LY_EVALID, lyxml_ctx_new(UTEST_LYCTX, in, &xmlctx));
+    CHECK_LOG_CTX("Invalid character sequence \"/>\", expected '='.", "Line number 1.");
+    ly_in_free(in, 0);
+
+    str = "<e xxx=/>";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+    assert_int_equal(LY_EVALID, lyxml_ctx_new(UTEST_LYCTX, in, &xmlctx));
+    CHECK_LOG_CTX("Invalid character sequence \"/>\", expected either single or double quotation mark.", "Line number 1.");
+    ly_in_free(in, 0);
+
+    str = "<e xxx\n = yyy/>";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+    assert_int_equal(LY_EVALID, lyxml_ctx_new(UTEST_LYCTX, in, &xmlctx));
+    CHECK_LOG_CTX("Invalid character sequence \"yyy/>\", expected either single or double quotation mark.", "Line number 2.");
+    ly_in_free(in, 0);
+
+    /* valid attribute */
+    str = "<e attr=\"val\"";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_new(UTEST_LYCTX, in, &xmlctx));
+    assert_int_equal(LYXML_ELEMENT, xmlctx->status);
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ATTRIBUTE, xmlctx->status);
+    assert_true(!strncmp("attr", xmlctx->name, xmlctx->name_len));
+    assert_null(xmlctx->prefix);
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ATTR_CONTENT, xmlctx->status);
+    assert_true(!strncmp("val", xmlctx->value, xmlctx->value_len));
+    assert_int_equal(xmlctx->ws_only, 0);
+    assert_int_equal(xmlctx->dynamic, 0);
+    lyxml_ctx_free(xmlctx);
+    ly_in_free(in, 0);
+
+    /* valid namespace with prefix */
+    str = "<e xmlns:nc\n = \'urn\'/>";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_new(UTEST_LYCTX, in, &xmlctx));
+    assert_int_equal(LYXML_ELEMENT, xmlctx->status);
+    assert_int_equal(1, xmlctx->ns.count);
+    ns = (struct lyxml_ns *)xmlctx->ns.objs[0];
+    assert_string_equal(ns->prefix, "nc");
+    assert_string_equal(ns->uri, "urn");
+    lyxml_ctx_free(xmlctx);
+    ly_in_free(in, 0);
+}
+
+static void
+test_text(void **state)
+{
+    const char *str;
+    struct lyxml_ctx *xmlctx;
+    struct ly_in *in;
+
+    /* empty attribute value */
+    str = "<e a=\"\"";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_new(UTEST_LYCTX, in, &xmlctx));
+    assert_int_equal(LYXML_ELEMENT, xmlctx->status);
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ATTRIBUTE, xmlctx->status);
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ATTR_CONTENT, xmlctx->status);
+    assert_true(!strncmp("", xmlctx->value, xmlctx->value_len));
+    assert_int_equal(xmlctx->ws_only, 1);
+    assert_int_equal(xmlctx->dynamic, 0);
+    ly_in_free(in, 0);
+
+    /* empty value but in single quotes */
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory("=\'\'", &in));
+    xmlctx->in = in;
+    LOG_LOCSET(NULL, NULL, NULL, in);
+    xmlctx->status = LYXML_ATTRIBUTE;
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ATTR_CONTENT, xmlctx->status);
+    assert_true(!strncmp("", xmlctx->value, xmlctx->value_len));
+    assert_int_equal(xmlctx->ws_only, 1);
+    assert_int_equal(xmlctx->dynamic, 0);
+    ly_in_free(in, 0);
+
+    /* empty element content - only formating before defining child */
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(">\n  <y>", &in));
+    xmlctx->in = in;
+    LOG_LOCSET(NULL, NULL, NULL, in);
+    xmlctx->status = LYXML_ELEMENT;
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ELEM_CONTENT, xmlctx->status);
+    assert_true(!strncmp("\n  ", xmlctx->value, xmlctx->value_len));
+    assert_int_equal(xmlctx->ws_only, 1);
+    assert_int_equal(xmlctx->dynamic, 0);
+    ly_in_free(in, 0);
+
+    /* empty element content is invalid - missing content terminating character < */
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory("", &in));
+    xmlctx->in = in;
+    LOG_LOCSET(NULL, NULL, NULL, in);
+    xmlctx->status = LYXML_ELEM_CONTENT;
+    assert_int_equal(LY_EVALID, lyxml_ctx_next(xmlctx));
+    CHECK_LOG_CTX("Unexpected end-of-input.", "Line number 1.");
+    ly_in_free(in, 0);
+
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory("xxx", &in));
+    xmlctx->in = in;
+    LOG_LOCSET(NULL, NULL, NULL, in);
+    xmlctx->status = LYXML_ELEM_CONTENT;
+    assert_int_equal(LY_EVALID, lyxml_ctx_next(xmlctx));
+    CHECK_LOG_CTX("Invalid character sequence \"xxx\", expected element tag start ('<').", "Line number 1.");
+    ly_in_free(in, 0);
+
+    lyxml_ctx_free(xmlctx);
+    LOG_LOCBACK(0, 0, 0, 4);
+
+    /* valid strings */
+    str = "<a>€𠜎Øn \n&lt;&amp;&quot;&apos;&gt; &#82;&#x4f;&#x4B;</a>";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_new(UTEST_LYCTX, in, &xmlctx));
+    assert_int_equal(LYXML_ELEMENT, xmlctx->status);
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ELEM_CONTENT, xmlctx->status);
+    assert_true(!strncmp("€𠜎Øn \n<&\"\'> ROK", xmlctx->value, xmlctx->value_len));
+    assert_int_equal(xmlctx->ws_only, 0);
+    assert_int_equal(xmlctx->dynamic, 1);
+    free((char *)xmlctx->value);
+    ly_in_free(in, 0);
+
+    /* test using n-bytes UTF8 hexadecimal code points */
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory("=\'&#x0024;&#x00A2;&#x20ac;&#x10348;\'", &in));
+    xmlctx->in = in;
+    LOG_LOCSET(NULL, NULL, NULL, in);
+    xmlctx->status = LYXML_ATTRIBUTE;
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ATTR_CONTENT, xmlctx->status);
+    assert_true(!strncmp("$¢€𐍈", xmlctx->value, xmlctx->value_len));
+    assert_int_equal(xmlctx->ws_only, 0);
+    assert_int_equal(xmlctx->dynamic, 1);
+    ly_in_free(in, 0);
+
+    /* CDATA value */
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(">   <![CDATA[    special non-escaped chars <>&\"'  ]]>  </a>", &in));
+    xmlctx->in = in;
+    LOG_LOCSET(NULL, NULL, NULL, in);
+    xmlctx->status = LYXML_ATTR_CONTENT;
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ELEM_CONTENT, xmlctx->status);
+    assert_true(!strncmp("       special non-escaped chars <>&\"'    ", xmlctx->value, xmlctx->value_len));
+    assert_int_equal(xmlctx->ws_only, 0);
+    assert_int_equal(xmlctx->dynamic, 1);
+    free((char *)xmlctx->value);
+    ly_in_free(in, 0);
+
+    /* invalid characters in string */
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory("=\'&#x52\'", &in));
+    xmlctx->in = in;
+    LOG_LOCSET(NULL, NULL, NULL, in);
+    xmlctx->status = LYXML_ATTRIBUTE;
+    assert_int_equal(LY_EVALID, lyxml_ctx_next(xmlctx));
+    CHECK_LOG_CTX("Invalid character sequence \"'\", expected ;.", "Line number 1.");
+    ly_in_free(in, 0);
+
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory("=\"&#82\"", &in));
+    xmlctx->in = in;
+    LOG_LOCSET(NULL, NULL, NULL, in);
+    xmlctx->status = LYXML_ATTRIBUTE;
+    assert_int_equal(LY_EVALID, lyxml_ctx_next(xmlctx));
+    CHECK_LOG_CTX("Invalid character sequence \"\"\", expected ;.", "Line number 1.");
+    ly_in_free(in, 0);
+
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory("=\"&nonsense;\"", &in));
+    xmlctx->in = in;
+    LOG_LOCSET(NULL, NULL, NULL, in);
+    xmlctx->status = LYXML_ATTRIBUTE;
+    assert_int_equal(LY_EVALID, lyxml_ctx_next(xmlctx));
+    CHECK_LOG_CTX("Entity reference \"&nonsense;\" not supported, only predefined references allowed.", "Line number 1.");
+    ly_in_free(in, 0);
+
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(">&#o122;", &in));
+    xmlctx->in = in;
+    LOG_LOCSET(NULL, NULL, NULL, in);
+    xmlctx->status = LYXML_ELEMENT;
+    assert_int_equal(LY_EVALID, lyxml_ctx_next(xmlctx));
+    CHECK_LOG_CTX("Invalid character reference \"&#o122;\".", "Line number 1.");
+    ly_in_free(in, 0);
+
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory("=\'&#x06;\'", &in));
+    xmlctx->in = in;
+    LOG_LOCSET(NULL, NULL, NULL, in);
+    xmlctx->status = LYXML_ATTRIBUTE;
+    assert_int_equal(LY_EVALID, lyxml_ctx_next(xmlctx));
+    CHECK_LOG_CTX("Invalid character reference \"&#x06;\'\" (0x00000006).", "Line number 1.");
+    ly_in_free(in, 0);
+
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory("=\'&#xfdd0;\'", &in));
+    xmlctx->in = in;
+    LOG_LOCSET(NULL, NULL, NULL, in);
+    xmlctx->status = LYXML_ATTRIBUTE;
+    assert_int_equal(LY_EVALID, lyxml_ctx_next(xmlctx));
+    CHECK_LOG_CTX("Invalid character reference \"&#xfdd0;\'\" (0x0000fdd0).", "Line number 1.");
+    ly_in_free(in, 0);
+
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory("=\'&#xffff;\'", &in));
+    xmlctx->in = in;
+    LOG_LOCSET(NULL, NULL, NULL, in);
+    xmlctx->status = LYXML_ATTRIBUTE;
+    assert_int_equal(LY_EVALID, lyxml_ctx_next(xmlctx));
+    CHECK_LOG_CTX("Invalid character reference \"&#xffff;\'\" (0x0000ffff).", "Line number 1.");
+    ly_in_free(in, 0);
+
+    lyxml_ctx_free(xmlctx);
+    LOG_LOCBACK(0, 0, 0, 9);
+}
+
+static void
+test_ns(void **state)
+{
+    const char *str;
+    struct lyxml_ctx *xmlctx;
+    struct ly_in *in;
+    const struct lyxml_ns *ns;
+
+    /* opening element1 */
+    str = "<element1/>";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_new(UTEST_LYCTX, in, &xmlctx));
+
+    /* processing namespace definitions */
+    assert_int_equal(LY_SUCCESS, lyxml_ns_add(xmlctx, NULL, 0, strdup("urn:default")));
+    assert_int_equal(LY_SUCCESS, lyxml_ns_add(xmlctx, "nc", 2, strdup("urn:nc1")));
+    /* simulate adding open element2 into context */
+    xmlctx->elements.count++;
+    /* processing namespace definitions */
+    assert_int_equal(LY_SUCCESS, lyxml_ns_add(xmlctx, "nc", 2, strdup("urn:nc2")));
+    assert_int_equal(3, xmlctx->ns.count);
+    assert_int_not_equal(0, xmlctx->ns.size);
+
+    ns = lyxml_ns_get(&xmlctx->ns, NULL, 0);
+    assert_non_null(ns);
+    assert_null(ns->prefix);
+    assert_string_equal("urn:default", ns->uri);
+
+    ns = lyxml_ns_get(&xmlctx->ns, "nc", 2);
+    assert_non_null(ns);
+    assert_string_equal("nc", ns->prefix);
+    assert_string_equal("urn:nc2", ns->uri);
+
+    /* simulate closing element2 */
+    xmlctx->elements.count--;
+    lyxml_ns_rm(xmlctx);
+    assert_int_equal(2, xmlctx->ns.count);
+
+    ns = lyxml_ns_get(&xmlctx->ns, "nc", 2);
+    assert_non_null(ns);
+    assert_string_equal("nc", ns->prefix);
+    assert_string_equal("urn:nc1", ns->uri);
+
+    /* close element1 */
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(0, xmlctx->ns.count);
+
+    assert_null(lyxml_ns_get(&xmlctx->ns, "nc", 2));
+    assert_null(lyxml_ns_get(&xmlctx->ns, NULL, 0));
+
+    lyxml_ctx_free(xmlctx);
+    ly_in_free(in, 0);
+}
+
+static void
+test_ns2(void **state)
+{
+    const char *str;
+    struct lyxml_ctx *xmlctx;
+    struct ly_in *in;
+
+    /* opening element1 */
+    str = "<element1/>";
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(str, &in));
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_new(UTEST_LYCTX, in, &xmlctx));
+
+    /* default namespace defined in parent element1 */
+    assert_int_equal(LY_SUCCESS, lyxml_ns_add(xmlctx, NULL, 0, strdup("urn:default")));
+    assert_int_equal(1, xmlctx->ns.count);
+    /* going into child element1 */
+    /* simulate adding open element1 into context */
+    xmlctx->elements.count++;
+    /* no namespace defined, going out (first, simulate closing of so far open element) */
+    xmlctx->elements.count--;
+    lyxml_ns_rm(xmlctx);
+    assert_int_equal(1, xmlctx->ns.count);
+
+    /* nothing else, going out of the parent element1 */
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(0, xmlctx->ns.count);
+
+    lyxml_ctx_free(xmlctx);
+    ly_in_free(in, 0);
+}
+
+static void
+test_simple_xml(void **state)
+{
+    struct lyxml_ctx *xmlctx;
+    struct ly_in *in;
+    const char *test_input = "<elem1 attr1=\"value\"> <elem2 attr2=\"value\" /> </elem1>";
+
+    assert_int_equal(LY_SUCCESS, ly_in_new_memory(test_input, &in));
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_new(UTEST_LYCTX, in, &xmlctx));
+    assert_int_equal(LYXML_ELEMENT, xmlctx->status);
+    assert_string_equal(xmlctx->in->current, "attr1=\"value\"> <elem2 attr2=\"value\" /> </elem1>");
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ATTRIBUTE, xmlctx->status);
+    assert_string_equal(xmlctx->in->current, "=\"value\"> <elem2 attr2=\"value\" /> </elem1>");
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ATTR_CONTENT, xmlctx->status);
+    assert_string_equal(xmlctx->in->current, "> <elem2 attr2=\"value\" /> </elem1>");
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ELEM_CONTENT, xmlctx->status);
+    assert_string_equal(xmlctx->in->current, "<elem2 attr2=\"value\" /> </elem1>");
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ELEMENT, xmlctx->status);
+    assert_string_equal(xmlctx->in->current, "attr2=\"value\" /> </elem1>");
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ATTRIBUTE, xmlctx->status);
+    assert_string_equal(xmlctx->in->current, "=\"value\" /> </elem1>");
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ATTR_CONTENT, xmlctx->status);
+    assert_string_equal(xmlctx->in->current, " /> </elem1>");
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ELEM_CONTENT, xmlctx->status);
+    assert_string_equal(xmlctx->in->current, "/> </elem1>");
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ELEM_CLOSE, xmlctx->status);
+    assert_string_equal(xmlctx->in->current, " </elem1>");
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_ELEM_CLOSE, xmlctx->status);
+    assert_string_equal(xmlctx->in->current, "");
+
+    assert_int_equal(LY_SUCCESS, lyxml_ctx_next(xmlctx));
+    assert_int_equal(LYXML_END, xmlctx->status);
+    assert_string_equal(xmlctx->in->current, "");
+
+    lyxml_ctx_free(xmlctx);
+    ly_in_free(in, 0);
+}
+
+int
+main(void)
+{
+    const struct CMUnitTest tests[] = {
+        UTEST(test_element),
+        UTEST(test_attribute),
+        UTEST(test_text),
+        UTEST(test_ns),
+        UTEST(test_ns2),
+        UTEST(test_simple_xml),
+    };
+
+    return cmocka_run_group_tests(tests, NULL, NULL);
+}
diff --git a/tests/utests/basic/test_xpath.c b/tests/utests/basic/test_xpath.c
new file mode 100644
index 0000000..b388dc3
--- /dev/null
+++ b/tests/utests/basic/test_xpath.c
@@ -0,0 +1,1071 @@
+/**
+ * @file test_xpath.c
+ * @author: Michal Vasko <mvasko@cesnet.cz>
+ * @brief unit tests for XPath evaluation
+ *
+ * Copyright (c) 2020 CESNET, z.s.p.o.
+ *
+ * This source code is licensed under BSD 3-Clause License (the "License").
+ * You may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://opensource.org/licenses/BSD-3-Clause
+ */
+#define _UTEST_MAIN_
+#include "utests.h"
+
+#include <string.h>
+
+#include "context.h"
+#include "parser_data.h"
+#include "set.h"
+#include "tests_config.h"
+#include "tree_data.h"
+#include "tree_schema.h"
+
+const char *schema_a =
+        "module a {\n"
+        "    namespace urn:tests:a;\n"
+        "    prefix a;\n"
+        "    yang-version 1.1;\n"
+        "\n"
+        "    identity id_a;\n"
+        "    identity id_b {\n"
+        "        base id_a;\n"
+        "    }\n"
+        "    identity id_c {\n"
+        "        base id_b;\n"
+        "    }\n"
+        "\n"
+        "    list l1 {\n"
+        "        key \"a b\";\n"
+        "        leaf a {\n"
+        "            type string;\n"
+        "        }\n"
+        "        leaf b {\n"
+        "            type string;\n"
+        "        }\n"
+        "        leaf c {\n"
+        "            type string;\n"
+        "        }\n"
+        "    }\n"
+        "    leaf foo {\n"
+        "        type string;\n"
+        "    }\n"
+        "    leaf foo2 {\n"
+        "        type uint8;\n"
+        "    }\n"
+        "    leaf foo3 {\n"
+        "        type identityref {\n"
+        "            base id_a;\n"
+        "        }\n"
+        "    }\n"
+        "    leaf foo4 {\n"
+        "        type decimal64 {\n"
+        "            fraction-digits 5;\n"
+        "        }\n"
+        "    }\n"
+        "    container c {\n"
+        "        leaf x {\n"
+        "            type string;\n"
+        "        }\n"
+        "        list ll {\n"
+        "            key \"a\";\n"
+        "            leaf a {\n"
+        "                type string;\n"
+        "            }\n"
+        "            list ll {\n"
+        "                key \"a\";\n"
+        "                leaf a {\n"
+        "                    type string;\n"
+        "                }\n"
+        "                leaf b {\n"
+        "                    type string;\n"
+        "                }\n"
+        "            }\n"
+        "        }\n"
+        "        leaf-list ll2 {\n"
+        "            type string;\n"
+        "        }\n"
+        "    }\n"
+        "}";
+
+static int
+setup(void **state)
+{
+    UTEST_SETUP;
+
+    UTEST_ADD_MODULE(schema_a, LYS_IN_YANG, NULL, NULL);
+    lys_parse_path(UTEST_LYCTX, TESTS_DIR_MODULES_YANG "/ietf-interfaces@2014-05-08.yang", LYS_IN_YANG, NULL);
+
+    return 0;
+}
+
+static void
+test_predicate(void **state)
+{
+    const char *data;
+    struct lyd_node *tree;
+    struct ly_set *set;
+
+    data =
+            "<foo2 xmlns=\"urn:tests:a\">50</foo2>"
+            "<l1 xmlns=\"urn:tests:a\">"
+            "  <a>a1</a>"
+            "  <b>b1</b>"
+            "  <c>c1</c>"
+            "</l1>"
+            "<l1 xmlns=\"urn:tests:a\">"
+            "  <a>a2</a>"
+            "  <b>b2</b>"
+            "</l1>"
+            "<l1 xmlns=\"urn:tests:a\">"
+            "  <a>a3</a>"
+            "  <b>b3</b>"
+            "</l1>"
+            "<l1 xmlns=\"urn:tests:a\">"
+            "  <a>a4</a>"
+            "  <b>b4</b>"
+            "  <c>c4</c>"
+            "</l1>"
+            "<l1 xmlns=\"urn:tests:a\">"
+            "  <a>a5</a>"
+            "  <b>b5</b>"
+            "  <c>c5</c>"
+            "</l1>"
+            "<c xmlns=\"urn:tests:a\">"
+            "  <x>key2</x>"
+            "  <ll>"
+            "    <a>key1</a>"
+            "    <ll>"
+            "      <a>key11</a>"
+            "      <b>val11</b>"
+            "    </ll>"
+            "    <ll>"
+            "      <a>key12</a>"
+            "      <b>val12</b>"
+            "    </ll>"
+            "    <ll>"
+            "      <a>key13</a>"
+            "      <b>val13</b>"
+            "    </ll>"
+            "  </ll>"
+            "  <ll>"
+            "    <a>key2</a>"
+            "    <ll>"
+            "      <a>key21</a>"
+            "      <b>val21</b>"
+            "    </ll>"
+            "    <ll>"
+            "      <a>key22</a>"
+            "      <b>val22</b>"
+            "    </ll>"
+            "  </ll>"
+            "  <ll>"
+            "    <a>key3</a>"
+            "    <ll>"
+            "      <a>key31</a>"
+            "      <b>val31</b>"
+            "    </ll>"
+            "    <ll>"
+            "      <a>key32</a>"
+            "      <b>val32</b>"
+            "    </ll>"
+            "  </ll>"
+            "</c>";
+    assert_int_equal(LY_SUCCESS, lyd_parse_data_mem(UTEST_LYCTX, data, LYD_XML, LYD_PARSE_STRICT, LYD_VALIDATE_PRESENT, &tree));
+    assert_non_null(tree);
+
+    /* predicate after number */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/foo2[4[3 = 3]]", &set));
+    assert_int_equal(0, set->count);
+    ly_set_free(set, NULL);
+
+    /* reverse axis */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/c/child::ll[2]/preceding::ll[3]", &set));
+    assert_int_equal(1, set->count);
+    assert_string_equal("key11", lyd_get_value(lyd_child(set->dnodes[0])));
+    ly_set_free(set, NULL);
+
+    /* special predicate evaluated using hashes */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/a:l1[a=concat('a', '1')][b=substring('ab1',2)]", &set));
+    assert_int_equal(1, set->count);
+    ly_set_free(set, NULL);
+
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/a:c/ll[a=../x]", &set));
+    assert_int_equal(1, set->count);
+    ly_set_free(set, NULL);
+
+    /* cannot use hashes */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/a:c/ll[a=substring(ll/a,1,4)]", &set));
+    assert_int_equal(3, set->count);
+    ly_set_free(set, NULL);
+
+    /* nested predicate */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/a:c/a:ll[a:a=string(/a:l1[a:a='foo']/a:a)]/a:a", &set));
+    assert_int_equal(0, set->count);
+    ly_set_free(set, NULL);
+
+    lyd_free_all(tree);
+}
+
+static void
+test_union(void **state)
+{
+    const char *data;
+    struct lyd_node *tree;
+    struct ly_set *set;
+
+    data =
+            "<l1 xmlns=\"urn:tests:a\">\n"
+            "    <a>a1</a>\n"
+            "    <b>b1</b>\n"
+            "    <c>c1</c>\n"
+            "</l1>\n"
+            "<l1 xmlns=\"urn:tests:a\">\n"
+            "    <a>a2</a>\n"
+            "    <b>b2</b>\n"
+            "</l1>"
+            "<l1 xmlns=\"urn:tests:a\">\n"
+            "    <a>a3</a>\n"
+            "    <b>b3</b>\n"
+            "    <c>c3</c>\n"
+            "</l1>";
+    assert_int_equal(LY_SUCCESS, lyd_parse_data_mem(UTEST_LYCTX, data, LYD_XML, LYD_PARSE_STRICT, LYD_VALIDATE_PRESENT, &tree));
+    assert_non_null(tree);
+
+    /* Predicate for operand. */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/l1[c[../a = 'a1'] | c]/a", &set));
+    ly_set_free(set, NULL);
+
+    lyd_free_all(tree);
+}
+
+static void
+test_invalid(void **state)
+{
+    const char *data =
+            "<foo2 xmlns=\"urn:tests:a\">50</foo2>";
+    struct lyd_node *tree;
+    struct ly_set *set;
+
+    assert_int_equal(LY_SUCCESS, lyd_parse_data_mem(UTEST_LYCTX, data, LYD_XML, LYD_PARSE_STRICT, LYD_VALIDATE_PRESENT, &tree));
+    assert_non_null(tree);
+
+    assert_int_equal(LY_EVALID, lyd_find_xpath(tree, "/a:foo2[.=]", &set));
+    assert_null(set);
+
+    assert_int_equal(LY_EVALID, lyd_find_xpath(tree, "/a:", &set));
+    assert_null(set);
+
+    lyd_free_all(tree);
+}
+
+static void
+test_hash(void **state)
+{
+    const char *data =
+            "<l1 xmlns=\"urn:tests:a\">\n"
+            "    <a>a1</a>\n"
+            "    <b>b1</b>\n"
+            "    <c>c1</c>\n"
+            "</l1>\n"
+            "<l1 xmlns=\"urn:tests:a\">\n"
+            "    <a>a2</a>\n"
+            "    <b>b2</b>\n"
+            "</l1>\n"
+            "<l1 xmlns=\"urn:tests:a\">\n"
+            "    <a>a3</a>\n"
+            "    <b>b3</b>\n"
+            "    <c>c3</c>\n"
+            "</l1>\n"
+            "<foo xmlns=\"urn:tests:a\">foo value</foo>\n"
+            "<c xmlns=\"urn:tests:a\">\n"
+            "    <x>val</x>\n"
+            "    <ll>\n"
+            "        <a>val_a</a>\n"
+            "        <ll>\n"
+            "            <a>val_a</a>\n"
+            "            <b>val</b>\n"
+            "        </ll>\n"
+            "        <ll>\n"
+            "            <a>val_b</a>\n"
+            "        </ll>\n"
+            "    </ll>\n"
+            "    <ll>\n"
+            "        <a>val_b</a>\n"
+            "        <ll>\n"
+            "            <a>val_a</a>\n"
+            "        </ll>\n"
+            "        <ll>\n"
+            "            <a>val_b</a>\n"
+            "            <b>val</b>\n"
+            "        </ll>\n"
+            "    </ll>\n"
+            "    <ll>\n"
+            "        <a>val_c</a>\n"
+            "        <ll>\n"
+            "            <a>val_a</a>\n"
+            "        </ll>\n"
+            "        <ll>\n"
+            "            <a>val_b</a>\n"
+            "        </ll>\n"
+            "    </ll>\n"
+            "    <ll2>one</ll2>\n"
+            "    <ll2>two</ll2>\n"
+            "    <ll2>three</ll2>\n"
+            "    <ll2>four</ll2>\n"
+            "</c>";
+    struct lyd_node *tree, *node;
+    struct ly_set *set;
+
+    assert_int_equal(LY_SUCCESS, lyd_parse_data_mem(UTEST_LYCTX, data, LYD_XML, LYD_PARSE_STRICT, LYD_VALIDATE_PRESENT, &tree));
+    assert_non_null(tree);
+
+    /* top-level, so hash table is not ultimately used but instances can be compared based on hashes */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/a:l1[a='a3'][b='b3']", &set));
+    assert_int_equal(1, set->count);
+
+    node = set->objs[0];
+    assert_string_equal(node->schema->name, "l1");
+    node = lyd_child(node);
+    assert_string_equal(node->schema->name, "a");
+    assert_string_equal(lyd_get_value(node), "a3");
+
+    ly_set_free(set, NULL);
+
+    /* hashes should be used for both searches (well, there are not enough nested ll instances, so technically not true) */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/a:c/ll[a='val_b']/ll[a='val_b']", &set));
+    assert_int_equal(1, set->count);
+
+    node = set->objs[0];
+    assert_string_equal(node->schema->name, "ll");
+    node = lyd_child(node);
+    assert_string_equal(node->schema->name, "a");
+    assert_string_equal(lyd_get_value(node), "val_b");
+    node = node->next;
+    assert_string_equal(node->schema->name, "b");
+    assert_null(node->next);
+
+    ly_set_free(set, NULL);
+
+    /* hashes are not used */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/a:c//ll[a='val_b']", &set));
+    assert_int_equal(4, set->count);
+
+    ly_set_free(set, NULL);
+
+    /* hashes used even for leaf-lists */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/a:c/ll2[. = 'three']", &set));
+    assert_int_equal(1, set->count);
+
+    node = set->objs[0];
+    assert_string_equal(node->schema->name, "ll2");
+    assert_string_equal(lyd_get_value(node), "three");
+
+    ly_set_free(set, NULL);
+
+    /* not found using hashes */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/a:c/ll[a='val_d']", &set));
+    assert_int_equal(0, set->count);
+
+    ly_set_free(set, NULL);
+
+    /* white-spaces are also ok */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/a:c/ll[ \na = 'val_c' ]", &set));
+    assert_int_equal(1, set->count);
+
+    ly_set_free(set, NULL);
+
+    lyd_free_all(tree);
+}
+
+static void
+test_toplevel(void **state)
+{
+    const char *schema_b =
+            "module b {\n"
+            "    namespace urn:tests:b;\n"
+            "    prefix b;\n"
+            "    yang-version 1.1;\n"
+            "\n"
+            "    list l2 {\n"
+            "        key \"a\";\n"
+            "        leaf a {\n"
+            "            type uint16;\n"
+            "        }\n"
+            "        leaf b {\n"
+            "            type uint16;\n"
+            "        }\n"
+            "    }\n"
+            "}";
+    const char *data =
+            "<l1 xmlns=\"urn:tests:a\">\n"
+            "    <a>a1</a>\n"
+            "    <b>b1</b>\n"
+            "    <c>c1</c>\n"
+            "</l1>\n"
+            "<l1 xmlns=\"urn:tests:a\">\n"
+            "    <a>a2</a>\n"
+            "    <b>b2</b>\n"
+            "</l1>\n"
+            "<l1 xmlns=\"urn:tests:a\">\n"
+            "    <a>a3</a>\n"
+            "    <b>b3</b>\n"
+            "    <c>c3</c>\n"
+            "</l1>\n"
+            "<foo xmlns=\"urn:tests:a\">foo value</foo>\n"
+            "<l2 xmlns=\"urn:tests:b\">\n"
+            "    <a>1</a>\n"
+            "    <b>1</b>\n"
+            "</l2>\n"
+            "<l2 xmlns=\"urn:tests:b\">\n"
+            "    <a>2</a>\n"
+            "    <b>1</b>\n"
+            "</l2>\n"
+            "<l2 xmlns=\"urn:tests:b\">\n"
+            "    <a>3</a>\n"
+            "    <b>1</b>\n"
+            "</l2>";
+    struct lyd_node *tree;
+    struct ly_set *set;
+
+    UTEST_ADD_MODULE(schema_b, LYS_IN_YANG, NULL, NULL);
+
+    assert_int_equal(LY_SUCCESS, lyd_parse_data_mem(UTEST_LYCTX, data, LYD_XML, LYD_PARSE_STRICT, LYD_VALIDATE_PRESENT, &tree));
+    assert_non_null(tree);
+
+    /* all top-level nodes from one module (default container as well) */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/a:*", &set));
+    assert_int_equal(5, set->count);
+
+    ly_set_free(set, NULL);
+
+    /* all top-level nodes from all modules */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/*", &set));
+    assert_int_equal(8, set->count);
+
+    ly_set_free(set, NULL);
+
+    /* all nodes from one module */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "//a:*", &set));
+    assert_int_equal(13, set->count);
+
+    ly_set_free(set, NULL);
+
+    /* all nodes from all modules */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "//*", &set));
+    assert_int_equal(22, set->count);
+
+    ly_set_free(set, NULL);
+
+    /* all nodes from all modules #2 */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "//.", &set));
+    assert_int_equal(22, set->count);
+
+    ly_set_free(set, NULL);
+
+    lyd_free_all(tree);
+}
+
+static void
+test_atomize(void **state)
+{
+    struct ly_set *set;
+    const struct lys_module *mod;
+
+    mod = ly_ctx_get_module_latest(UTEST_LYCTX, "a");
+    assert_non_null(mod);
+
+    /* some random paths just making sure the API function works */
+    assert_int_equal(LY_SUCCESS, lys_find_xpath_atoms(UTEST_LYCTX, NULL, "/a:*", 0, &set));
+    assert_int_equal(6, set->count);
+    ly_set_free(set, NULL);
+
+    /* all nodes from all modules (including internal, which can change easily, so check just the test modules) */
+    assert_int_equal(LY_SUCCESS, lys_find_xpath_atoms(UTEST_LYCTX, NULL, "//.", 0, &set));
+    assert_in_range(set->count, 17, UINT32_MAX);
+    ly_set_free(set, NULL);
+
+    assert_int_equal(LY_SUCCESS, lys_find_xpath_atoms(UTEST_LYCTX, NULL, "/a:c/ll[a='val1']/ll[a='val2']/b", 0, &set));
+    assert_int_equal(6, set->count);
+    ly_set_free(set, NULL);
+
+    assert_int_equal(LY_SUCCESS, lys_find_xpath_atoms(UTEST_LYCTX, NULL, "/ietf-interfaces:interfaces/*", 0, &set));
+    assert_int_equal(2, set->count);
+    ly_set_free(set, NULL);
+
+    assert_int_equal(LY_SUCCESS, lys_find_xpath_atoms(UTEST_LYCTX, NULL, "/*", 0, &set));
+    assert_int_equal(13, set->count);
+    ly_set_free(set, NULL);
+
+    /*
+     * axes
+     */
+
+    /* ancestor */
+    assert_int_equal(LY_SUCCESS, lys_find_xpath_atoms(UTEST_LYCTX, NULL, "//ll[a and b]/a/ancestor::node()", 0, &set));
+    assert_int_equal(6, set->count);
+    ly_set_free(set, NULL);
+
+    /* ancestor-or-self */
+    assert_int_equal(LY_SUCCESS, lys_find_xpath_atoms(UTEST_LYCTX, NULL, "//ll[a and b]/ancestor-or-self::ll", 0, &set));
+    assert_int_equal(5, set->count);
+    ly_set_free(set, NULL);
+
+    /* attribute */
+    assert_int_equal(LY_SUCCESS, lys_find_xpath_atoms(UTEST_LYCTX, NULL, "/l1/attribute::key", 0, &set));
+    assert_int_equal(1, set->count);
+    ly_set_free(set, NULL);
+
+    /* child */
+    assert_int_equal(LY_SUCCESS, lys_find_xpath_atoms(UTEST_LYCTX, NULL, "/child::l1/child::a", 0, &set));
+    assert_int_equal(2, set->count);
+    ly_set_free(set, NULL);
+
+    /* descendant */
+    assert_int_equal(LY_SUCCESS, lys_find_xpath_atoms(UTEST_LYCTX, NULL, "/descendant::c/descendant::b", 0, &set));
+    assert_int_equal(3, set->count);
+    ly_set_free(set, NULL);
+
+    /* descendant-or-self */
+    assert_int_equal(LY_SUCCESS, lys_find_xpath_atoms(UTEST_LYCTX, NULL, "/a:*/descendant-or-self::c", 0, &set));
+    assert_int_equal(7, set->count);
+    ly_set_free(set, NULL);
+
+    /* following */
+    assert_int_equal(LY_SUCCESS, lys_find_xpath_atoms(UTEST_LYCTX, NULL, "/c/x/following::a", 0, &set));
+    assert_int_equal(4, set->count);
+    ly_set_free(set, NULL);
+
+    /* following-sibling */
+    assert_int_equal(LY_SUCCESS, lys_find_xpath_atoms(UTEST_LYCTX, NULL, "/c/x/following-sibling::ll", 0, &set));
+    assert_int_equal(3, set->count);
+    ly_set_free(set, NULL);
+
+    /* parent */
+    assert_int_equal(LY_SUCCESS, lys_find_xpath_atoms(UTEST_LYCTX, NULL, "/child::a:*/c/parent::l1", 0, &set));
+    assert_int_equal(7, set->count);
+    ly_set_free(set, NULL);
+
+    assert_int_equal(LY_SUCCESS, lys_find_xpath_atoms(UTEST_LYCTX, NULL, "/child::a:c//..", 0, &set));
+    assert_int_equal(8, set->count);
+    ly_set_free(set, NULL);
+
+    /* preceding */
+    assert_int_equal(LY_SUCCESS, lys_find_xpath_atoms(UTEST_LYCTX, NULL, "/c/preceding::a", 0, &set));
+    assert_int_equal(2, set->count);
+    ly_set_free(set, NULL);
+
+    /* preceding-sibling */
+    assert_int_equal(LY_SUCCESS, lys_find_xpath_atoms(UTEST_LYCTX, NULL, "/c/ll/preceding-sibling::node()", 0, &set));
+    assert_int_equal(3, set->count);
+    ly_set_free(set, NULL);
+
+    /* self */
+    assert_int_equal(LY_SUCCESS, lys_find_xpath_atoms(UTEST_LYCTX, NULL, "/c/self::c/ll/ll/b/self::b", 0, &set));
+    assert_int_equal(4, set->count);
+    ly_set_free(set, NULL);
+}
+
+static void
+test_canonize(void **state)
+{
+    const char *data =
+            "<foo2 xmlns=\"urn:tests:a\">50</foo2>"
+            "<foo3 xmlns=\"urn:tests:a\" xmlns:a=\"urn:tests:a\">a:id_b</foo3>"
+            "<foo4 xmlns=\"urn:tests:a\">250.5</foo4>";
+    struct lyd_node *tree;
+    struct ly_set *set;
+
+    assert_int_equal(LY_SUCCESS, lyd_parse_data_mem(UTEST_LYCTX, data, LYD_XML, LYD_PARSE_STRICT, LYD_VALIDATE_PRESENT, &tree));
+    assert_non_null(tree);
+
+    /* integer */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/a:foo2[.='050']", &set));
+    assert_int_equal(1, set->count);
+    ly_set_free(set, NULL);
+
+    /* identityref */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/a:foo3[.='id_b']", &set));
+    assert_int_equal(1, set->count);
+    ly_set_free(set, NULL);
+
+    /* decimal64 */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/a:foo4[.='0250.500']", &set));
+    assert_int_equal(1, set->count);
+    ly_set_free(set, NULL);
+
+    lyd_free_all(tree);
+}
+
+static void
+test_derived_from(void **state)
+{
+    const char *data =
+            "<foo3 xmlns=\"urn:tests:a\">id_c</foo3>";
+    struct lyd_node *tree;
+    struct ly_set *set;
+
+    assert_int_equal(LY_SUCCESS, lyd_parse_data_mem(UTEST_LYCTX, data, LYD_XML, LYD_PARSE_STRICT, LYD_VALIDATE_PRESENT, &tree));
+    assert_non_null(tree);
+
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/a:foo3[derived-from(., 'a:id_b')]", &set));
+    assert_int_equal(1, set->count);
+    ly_set_free(set, NULL);
+
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/a:foo3[derived-from(., 'a:id_a')]", &set));
+    assert_int_equal(1, set->count);
+    ly_set_free(set, NULL);
+
+    lyd_free_all(tree);
+}
+
+static void
+test_augment(void **state)
+{
+    const char *schema_b =
+            "module b {\n"
+            "    namespace urn:tests:b;\n"
+            "    prefix b;\n"
+            "    yang-version 1.1;\n"
+            "\n"
+            "    import a {\n"
+            "        prefix a;\n"
+            "    }\n"
+            "\n"
+            "    augment /a:c {\n"
+            "        leaf a {\n"
+            "            type uint16;\n"
+            "        }\n"
+            "    }\n"
+            "}";
+    const char *data =
+            "<c xmlns=\"urn:tests:a\">\n"
+            "    <x>value</x>\n"
+            "    <ll>\n"
+            "        <a>key</a>\n"
+            "    </ll>\n"
+            "    <a xmlns=\"urn:tests:b\">25</a>\n"
+            "    <ll2>c1</ll2>\n"
+            "</c>";
+    struct lyd_node *tree;
+    struct ly_set *set;
+
+    UTEST_ADD_MODULE(schema_b, LYS_IN_YANG, NULL, NULL);
+
+    assert_int_equal(LY_SUCCESS, lyd_parse_data_mem(UTEST_LYCTX, data, LYD_XML, LYD_PARSE_STRICT, LYD_VALIDATE_PRESENT, &tree));
+    assert_non_null(tree);
+
+    /* get all children ignoring their module */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/a:c/*", &set));
+    assert_int_equal(4, set->count);
+
+    ly_set_free(set, NULL);
+
+    lyd_free_all(tree);
+}
+
+static void
+test_variables(void **state)
+{
+    struct lyd_node *tree, *node;
+    struct ly_set *set;
+    const char *data;
+    struct lyxp_var *vars = NULL;
+
+#define LOCAL_SETUP(DATA, TREE) \
+    assert_int_equal(LY_SUCCESS, lyd_parse_data_mem(UTEST_LYCTX, DATA, LYD_XML, LYD_PARSE_STRICT, LYD_VALIDATE_PRESENT, &TREE)); \
+    assert_non_null(TREE);
+
+#define SET_NODE(NODE, SET, INDEX) \
+    assert_non_null(SET); \
+    assert_true(INDEX < SET->count); \
+    NODE = SET->objs[INDEX];
+
+#define LOCAL_TEARDOWN(SET, TREE, VARS) \
+    ly_set_free(SET, NULL); \
+    lyd_free_all(TREE); \
+    lyxp_vars_free(VARS); \
+    vars = NULL;
+
+    /* Eval variable to number. */
+    data =
+            "<l1 xmlns=\"urn:tests:a\">\n"
+            "    <a>a1</a>\n"
+            "    <b>b1</b>\n"
+            "    <c>c1</c>\n"
+            "</l1>"
+            "<l1 xmlns=\"urn:tests:a\">\n"
+            "    <a>a2</a>\n"
+            "    <b>b2</b>\n"
+            "    <c>c2</c>\n"
+            "</l1>";
+    LOCAL_SETUP(data, tree);
+    assert_int_equal(LY_SUCCESS, lyxp_vars_set(&vars, "var", "2"));
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath2(tree, "/l1[$var]/a", vars, &set));
+    SET_NODE(node, set, 0);
+    assert_string_equal(lyd_get_value(node), "a2");
+    LOCAL_TEARDOWN(set, tree, vars);
+
+    /* Eval variable to string. */
+    data =
+            "<foo xmlns=\"urn:tests:a\">mstr</foo>";
+    LOCAL_SETUP(data, tree);
+    assert_int_equal(LY_SUCCESS, lyxp_vars_set(&vars, "var", "\"mstr\""));
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath2(tree, "/foo[text() = $var]", vars, &set));
+    SET_NODE(node, set, 0);
+    assert_string_equal(lyd_get_value(node), "mstr");
+    LOCAL_TEARDOWN(set, tree, vars);
+
+    /* Eval variable to set of nodes. */
+    data =
+            "<l1 xmlns=\"urn:tests:a\">\n"
+            "    <a>a1</a>\n"
+            "    <b>b1</b>\n"
+            "</l1>"
+            "<l1 xmlns=\"urn:tests:a\">\n"
+            "    <a>a2</a>\n"
+            "    <b>b2</b>\n"
+            "    <c>c2</c>\n"
+            "</l1>";
+    LOCAL_SETUP(data, tree);
+    assert_int_equal(LY_SUCCESS, lyxp_vars_set(&vars, "var", "c"));
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath2(tree, "/l1[$var]/a", vars, &set));
+    SET_NODE(node, set, 0);
+    assert_string_equal(lyd_get_value(node), "a2");
+    LOCAL_TEARDOWN(set, tree, vars);
+
+    /* Variable in union expr. */
+    data =
+            "<l1 xmlns=\"urn:tests:a\">\n"
+            "    <a>a1</a>\n"
+            "    <b>b1</b>\n"
+            "    <c>c1</c>\n"
+            "</l1>"
+            "<l1 xmlns=\"urn:tests:a\">\n"
+            "    <a>a2</a>\n"
+            "    <b>b2</b>\n"
+            "    <c>c2</c>\n"
+            "</l1>"
+            "<l1 xmlns=\"urn:tests:a\">\n"
+            "    <a>a3</a>\n"
+            "    <b>b3</b>\n"
+            "    <c>c3</c>\n"
+            "</l1>";
+    LOCAL_SETUP(data, tree);
+    assert_int_equal(LY_SUCCESS, lyxp_vars_set(&vars, "var", "c[../a = 'a3']"));
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath2(tree, "/l1[c[../a = 'a1'] | $var]/a", vars, &set));
+    SET_NODE(node, set, 0);
+    assert_string_equal(lyd_get_value(node), "a1");
+    SET_NODE(node, set, 1);
+    assert_string_equal(lyd_get_value(node), "a3");
+    assert_int_equal(set->count, 2);
+    LOCAL_TEARDOWN(set, tree, vars);
+
+    /* Predicate after variable. */
+    data =
+            "<l1 xmlns=\"urn:tests:a\">\n"
+            "    <a>a1</a>\n"
+            "    <b>b1</b>\n"
+            "    <c>c1</c>\n"
+            "</l1>"
+            "<l1 xmlns=\"urn:tests:a\">\n"
+            "    <a>a2</a>\n"
+            "    <b>b2</b>\n"
+            "    <c>c2</c>\n"
+            "</l1>";
+    LOCAL_SETUP(data, tree);
+    assert_int_equal(LY_SUCCESS, lyxp_vars_set(&vars, "var", "c"));
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath2(tree, "/l1[$var[../a = 'a1']]/a", vars, &set));
+    SET_NODE(node, set, 0);
+    assert_string_equal(lyd_get_value(node), "a1");
+    LOCAL_TEARDOWN(set, tree, vars);
+
+    /* Variable in variable. */
+    data =
+            "<foo xmlns=\"urn:tests:a\">mstr</foo>";
+    LOCAL_SETUP(data, tree);
+    assert_int_equal(LY_SUCCESS, lyxp_vars_set(&vars, "var1", "$var2"));
+    assert_int_equal(LY_SUCCESS, lyxp_vars_set(&vars, "var2", "\"mstr\""));
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath2(tree, "/foo[text() = $var]", vars, &set));
+    SET_NODE(node, set, 0);
+    assert_string_equal(lyd_get_value(node), "mstr");
+    LOCAL_TEARDOWN(set, tree, vars);
+
+    /* Compare two variables. */
+    data =
+            "<foo xmlns=\"urn:tests:a\">mstr</foo>";
+    LOCAL_SETUP(data, tree);
+    assert_int_equal(LY_SUCCESS, lyxp_vars_set(&vars, "var1", "\"str\""));
+    assert_int_equal(LY_SUCCESS, lyxp_vars_set(&vars, "var2", "\"str\""));
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath2(tree, "/foo[$var1 = $var2]", vars, &set));
+    SET_NODE(node, set, 0);
+    assert_string_equal(lyd_get_value(node), "mstr");
+    LOCAL_TEARDOWN(set, tree, vars);
+
+    /* Arithmetic operation with variable. */
+    data =
+            "<foo2 xmlns=\"urn:tests:a\">4</foo2>";
+    LOCAL_SETUP(data, tree);
+    assert_int_equal(LY_SUCCESS, lyxp_vars_set(&vars, "var1", "2"));
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath2(tree, "/foo2[.= ($var1 * 2)]", vars, &set));
+    SET_NODE(node, set, 0);
+    assert_string_equal(lyd_get_value(node), "4");
+    LOCAL_TEARDOWN(set, tree, vars);
+
+    /* Variable as function parameter. */
+    data =
+            "<l1 xmlns=\"urn:tests:a\">\n"
+            "    <a>a1</a>\n"
+            "    <b>b1</b>\n"
+            "    <c>c1</c>\n"
+            "</l1>"
+            "<l1 xmlns=\"urn:tests:a\">\n"
+            "    <a>a2</a>\n"
+            "    <b>b2</b>\n"
+            "</l1>";
+    LOCAL_SETUP(data, tree);
+    assert_int_equal(LY_SUCCESS, lyxp_vars_set(&vars, "var", "./c"));
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath2(tree, "/l1[count($var) = 1]/a", vars, &set));
+    SET_NODE(node, set, 0);
+    assert_string_equal(lyd_get_value(node), "a1");
+    LOCAL_TEARDOWN(set, tree, vars);
+
+    /* Variable in path expr. */
+    /* NOTE: The variable can only be at the beginning of the expression path. */
+    data =
+            "<l1 xmlns=\"urn:tests:a\">\n"
+            "    <a>a1</a>\n"
+            "    <b>b1</b>\n"
+            "    <c>c1</c>\n"
+            "</l1>"
+            "<l1 xmlns=\"urn:tests:a\">\n"
+            "    <a>a2</a>\n"
+            "    <b>b2</b>\n"
+            "</l1>";
+    LOCAL_SETUP(data, tree);
+    assert_int_equal(LY_SUCCESS, lyxp_vars_set(&vars, "var", "/l1"));
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath2(tree, "/l1[$var/a]", vars, &set));
+    assert_int_equal(set->count, 2);
+    LOCAL_TEARDOWN(set, tree, vars);
+
+    /* Variable as function. */
+    data =
+            "<l1 xmlns=\"urn:tests:a\">\n"
+            "    <a>a1</a>\n"
+            "    <b>b1</b>\n"
+            "    <c>c1</c>\n"
+            "</l1>"
+            "<l1 xmlns=\"urn:tests:a\">\n"
+            "    <a>a2</a>\n"
+            "    <b>b2</b>\n"
+            "</l1>";
+    LOCAL_SETUP(data, tree);
+    assert_int_equal(LY_SUCCESS, lyxp_vars_set(&vars, "var", "position()"));
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath2(tree, "/l1[$var = 2]/a", vars, &set));
+    SET_NODE(node, set, 0);
+    assert_string_equal(lyd_get_value(node), "a2");
+    LOCAL_TEARDOWN(set, tree, vars);
+
+    /* Dynamic change of value. */
+    data =
+            "<l1 xmlns=\"urn:tests:a\">\n"
+            "    <a>a1</a>\n"
+            "    <b>b1</b>\n"
+            "    <c>c1</c>\n"
+            "</l1>"
+            "<l1 xmlns=\"urn:tests:a\">\n"
+            "    <a>a2</a>\n"
+            "    <b>b2</b>\n"
+            "    <c>c2</c>\n"
+            "</l1>";
+    LOCAL_SETUP(data, tree);
+    assert_int_equal(LY_SUCCESS, lyxp_vars_set(&vars, "var", "1"));
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath2(tree, "/l1[$var]/a", vars, &set));
+    SET_NODE(node, set, 0);
+    assert_string_equal(lyd_get_value(node), "a1");
+    ly_set_free(set, NULL);
+    assert_int_equal(LY_SUCCESS, lyxp_vars_set(&vars, "var", "2"));
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath2(tree, "/l1[$var]/a", vars, &set));
+    SET_NODE(node, set, 0);
+    assert_string_equal(lyd_get_value(node), "a2");
+    LOCAL_TEARDOWN(set, tree, vars);
+
+    /* Variable not defined. */
+    data =
+            "<foo xmlns=\"urn:tests:a\">mstr</foo>";
+    LOCAL_SETUP(data, tree);
+    assert_int_equal(LY_SUCCESS, lyxp_vars_set(&vars, "var1", "\"mstr\""));
+    assert_int_equal(LY_ENOTFOUND, lyd_find_xpath2(tree, "/foo[text() = $var55]", vars, &set));
+    LOCAL_TEARDOWN(set, tree, vars);
+
+    /* Syntax error in value. */
+    data =
+            "<foo xmlns=\"urn:tests:a\">mstr</foo>";
+    LOCAL_SETUP(data, tree);
+    assert_int_equal(LY_SUCCESS, lyxp_vars_set(&vars, "var", "\""));
+    assert_int_equal(LY_EVALID, lyd_find_xpath2(tree, "/foo[$var]", vars, &set));
+    LOCAL_TEARDOWN(set, tree, vars);
+
+    /* Prefix is not supported. */
+    data =
+            "<foo xmlns=\"urn:tests:a\">mstr</foo>";
+    LOCAL_SETUP(data, tree);
+    assert_int_equal(LY_SUCCESS, lyxp_vars_set(&vars, "var", "\""));
+    assert_int_equal(LY_EVALID, lyd_find_xpath2(tree, "/foo[$pref:var]", vars, &set));
+    assert_string_equal("Variable with prefix is not supported.", _UC->err_msg);
+    LOCAL_TEARDOWN(set, tree, vars);
+
+#undef LOCAL_SETUP
+#undef LOCAL_TEARDOWN
+}
+
+static void
+test_axes(void **state)
+{
+    const char *data;
+    struct lyd_node *tree;
+    struct ly_set *set;
+
+    data =
+            "<l1 xmlns=\"urn:tests:a\" xmlns:yang=\"urn:ietf:params:xml:ns:yang:1\">\n"
+            "  <a>a1</a>\n"
+            "  <b yang:operation=\"replace\">b1</b>\n"
+            "  <c yang:operation=\"none\">c1</c>\n"
+            "</l1>\n"
+            "<l1 xmlns=\"urn:tests:a\">\n"
+            "  <a>a2</a>\n"
+            "  <b>b2</b>\n"
+            "</l1>"
+            "<l1 xmlns=\"urn:tests:a\" xmlns:yang=\"urn:ietf:params:xml:ns:yang:1\">\n"
+            "  <a yang:operation=\"none\" yang:key=\"[no-key='no-value']\">a3</a>\n"
+            "  <b>b3</b>\n"
+            "  <c yang:value=\"no-val\">c3</c>\n"
+            "</l1>"
+            "<c xmlns=\"urn:tests:a\">"
+            "  <x>val</x>"
+            "  <ll>"
+            "    <a>key1</a>"
+            "    <ll>"
+            "      <a>key11</a>"
+            "      <b>val11</b>"
+            "    </ll>"
+            "    <ll>"
+            "      <a>key12</a>"
+            "      <b>val12</b>"
+            "    </ll>"
+            "    <ll>"
+            "      <a>key13</a>"
+            "      <b>val13</b>"
+            "    </ll>"
+            "  </ll>"
+            "  <ll>"
+            "    <a>key2</a>"
+            "    <ll>"
+            "      <a>key21</a>"
+            "      <b>val21</b>"
+            "    </ll>"
+            "    <ll>"
+            "      <a>key22</a>"
+            "      <b>val22</b>"
+            "    </ll>"
+            "  </ll>"
+            "</c>";
+    assert_int_equal(LY_SUCCESS, lyd_parse_data_mem(UTEST_LYCTX, data, LYD_XML, LYD_PARSE_STRICT, LYD_VALIDATE_PRESENT, &tree));
+    assert_non_null(tree);
+
+    /* ancestor */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "//ll[a and b]/a/ancestor::node()", &set));
+    assert_int_equal(8, set->count);
+    ly_set_free(set, NULL);
+
+    /* ancestor-or-self */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "//ll[a and b]/ancestor-or-self::ll", &set));
+    assert_int_equal(7, set->count);
+    ly_set_free(set, NULL);
+
+    /* attribute */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/l1/@operation", &set));
+    assert_int_equal(0, set->count);
+    ly_set_free(set, NULL);
+
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/l1/attribute::key", &set));
+    assert_int_equal(0, set->count);
+    ly_set_free(set, NULL);
+
+    /* child */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/child::l1/child::a", &set));
+    assert_int_equal(3, set->count);
+    ly_set_free(set, NULL);
+
+    /* descendant */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/descendant::c/descendant::b", &set));
+    assert_int_equal(5, set->count);
+    ly_set_free(set, NULL);
+
+    /* descendant-or-self */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "//c", &set));
+    assert_int_equal(3, set->count);
+    ly_set_free(set, NULL);
+
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/descendant-or-self::node()/c", &set));
+    assert_int_equal(3, set->count);
+    ly_set_free(set, NULL);
+
+    /* following */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/c/x/following::a", &set));
+    assert_int_equal(7, set->count);
+    ly_set_free(set, NULL);
+
+    /* following-sibling */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/c/x/following-sibling::ll", &set));
+    assert_int_equal(2, set->count);
+    ly_set_free(set, NULL);
+
+    /* parent */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/child::*/c/parent::l1", &set));
+    assert_int_equal(2, set->count);
+    ly_set_free(set, NULL);
+
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/child::c//..", &set));
+    assert_int_equal(8, set->count);
+    ly_set_free(set, NULL);
+
+    /* preceding */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/c/preceding::a", &set));
+    assert_int_equal(3, set->count);
+    ly_set_free(set, NULL);
+
+    /* preceding-sibling */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/c/ll/preceding-sibling::node()", &set));
+    assert_int_equal(2, set->count);
+    ly_set_free(set, NULL);
+
+    /* self */
+    assert_int_equal(LY_SUCCESS, lyd_find_xpath(tree, "/c/self::c/ll/ll/b/self::b", &set));
+    assert_int_equal(5, set->count);
+    ly_set_free(set, NULL);
+
+    lyd_free_all(tree);
+}
+
+int
+main(void)
+{
+    const struct CMUnitTest tests[] = {
+        UTEST(test_predicate, setup),
+        UTEST(test_union, setup),
+        UTEST(test_invalid, setup),
+        UTEST(test_hash, setup),
+        UTEST(test_toplevel, setup),
+        UTEST(test_atomize, setup),
+        UTEST(test_canonize, setup),
+        UTEST(test_derived_from, setup),
+        UTEST(test_augment, setup),
+        UTEST(test_variables, setup),
+        UTEST(test_axes, setup),
+    };
+
+    return cmocka_run_group_tests(tests, NULL, NULL);
+}
diff --git a/tests/utests/basic/test_yanglib.c b/tests/utests/basic/test_yanglib.c
new file mode 100644
index 0000000..0349157
--- /dev/null
+++ b/tests/utests/basic/test_yanglib.c
@@ -0,0 +1,144 @@
+/**
+ * @file test_yanglib.c
+ * @author: Michal Vasko <mvasko@cesnet.cz>
+ * @brief unit tests for ietf-yang-library data
+ *
+ * Copyright (c) 2020 CESNET, z.s.p.o.
+ *
+ * This source code is licensed under BSD 3-Clause License (the "License").
+ * You may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://opensource.org/licenses/BSD-3-Clause
+ */
+#define _UTEST_MAIN_
+#include "utests.h"
+
+#include <string.h>
+
+#include "context.h"
+#include "in.h"
+#include "log.h"
+#include "set.h"
+#include "tests_config.h"
+#include "tree_data.h"
+#include "tree_schema.h"
+
+const char *schema_a =
+        "module a {\n"
+        "  namespace urn:tests:a;\n"
+        "  prefix a;\n"
+        "  yang-version 1.1;\n"
+        "\n"
+        "  include a_sub;\n"
+        "\n"
+        "  list l2 {\n"
+        "    key \"a\";\n"
+        "    leaf a {\n"
+        "      type uint16;\n"
+        "    }\n"
+        "    leaf b {\n"
+        "      type uint16;\n"
+        "    }\n"
+        "  }\n"
+        "}";
+const char *schema_b =
+        "module b {\n"
+        "  namespace urn:tests:b;\n"
+        "  prefix b;\n"
+        "  yang-version 1.1;\n"
+        "\n"
+        "  import a {\n"
+        "    prefix a;\n"
+        "  }\n"
+        "\n"
+        "  deviation /a:l2 {\n"
+        "    deviate add {\n"
+        "      max-elements 40;\n"
+        "    }\n"
+        "  }\n"
+        "\n"
+        "  leaf foo {\n"
+        "    type string;\n"
+        "  }\n"
+        "}";
+
+static LY_ERR
+test_imp_clb(const char *mod_name, const char *mod_rev, const char *submod_name, const char *sub_rev, void *user_data,
+        LYS_INFORMAT *format, const char **module_data, void (**free_module_data)(void *model_data, void *user_data))
+{
+    const char *schema_a_sub =
+            "submodule a_sub {\n"
+            "    belongs-to a {\n"
+            "        prefix a;\n"
+            "    }\n"
+            "    yang-version 1.1;\n"
+            "\n"
+            "    feature feat1;\n"
+            "\n"
+            "    list l3 {\n"
+            "        key \"a\";\n"
+            "        leaf a {\n"
+            "            type uint16;\n"
+            "        }\n"
+            "        leaf b {\n"
+            "            type uint16;\n"
+            "        }\n"
+            "    }\n"
+            "}\n";
+
+    assert_string_equal(mod_name, "a");
+    assert_null(mod_rev);
+    if (!submod_name) {
+        return LY_ENOTFOUND;
+    }
+    assert_string_equal(submod_name, "a_sub");
+    assert_null(sub_rev);
+    assert_null(user_data);
+
+    *format = LYS_IN_YANG;
+    *module_data = schema_a_sub;
+    *free_module_data = NULL;
+    return LY_SUCCESS;
+}
+
+static void
+test_yanglib(void **state)
+{
+    const char *feats[] = {"feat1", NULL};
+    struct lyd_node *tree;
+    struct ly_set *set;
+    LY_ERR ret;
+
+    ly_ctx_set_module_imp_clb(UTEST_LYCTX, test_imp_clb, NULL);
+    UTEST_ADD_MODULE(schema_a, LYS_IN_YANG, feats, NULL);
+    UTEST_ADD_MODULE(schema_b, LYS_IN_YANG, NULL, NULL);
+
+    assert_int_equal(LY_SUCCESS, ly_ctx_get_yanglib_data(UTEST_LYCTX, &tree, "<<%u>>", ly_ctx_get_change_count(UTEST_LYCTX)));
+    lyd_free_all(tree);
+    assert_int_equal(LY_SUCCESS, ly_ctx_get_yanglib_data(UTEST_LYCTX, &tree, "%u", -10));
+    lyd_free_all(tree);
+    assert_int_equal(LY_SUCCESS, ly_ctx_get_yanglib_data(UTEST_LYCTX, &tree, ""));
+    lyd_free_all(tree);
+    assert_int_equal(LY_SUCCESS, ly_ctx_get_yanglib_data(UTEST_LYCTX, &tree, "%u", ly_ctx_get_change_count(UTEST_LYCTX)));
+
+    /* make sure there is "a" with a submodule and deviation */
+    ret = lyd_find_xpath(tree, "/ietf-yang-library:yang-library/module-set/module[name='a'][submodule/name='a_sub']"
+            "[feature='feat1'][deviation='b']", &set);
+    assert_int_equal(ret, LY_SUCCESS);
+
+    assert_int_equal(set->count, 1);
+    ly_set_free(set, NULL);
+
+    lyd_free_all(tree);
+}
+
+int
+main(void)
+{
+    const struct CMUnitTest tests[] = {
+        UTEST(test_yanglib),
+    };
+
+    return cmocka_run_group_tests(tests, NULL, NULL);
+}