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-rw-r--r--lib/kunit/assert.c274
1 files changed, 274 insertions, 0 deletions
diff --git a/lib/kunit/assert.c b/lib/kunit/assert.c
new file mode 100644
index 0000000000..05a09652f5
--- /dev/null
+++ b/lib/kunit/assert.c
@@ -0,0 +1,274 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Assertion and expectation serialization API.
+ *
+ * Copyright (C) 2019, Google LLC.
+ * Author: Brendan Higgins <brendanhiggins@google.com>
+ */
+#include <kunit/assert.h>
+#include <kunit/test.h>
+
+#include "string-stream.h"
+
+void kunit_assert_prologue(const struct kunit_loc *loc,
+ enum kunit_assert_type type,
+ struct string_stream *stream)
+{
+ const char *expect_or_assert = NULL;
+
+ switch (type) {
+ case KUNIT_EXPECTATION:
+ expect_or_assert = "EXPECTATION";
+ break;
+ case KUNIT_ASSERTION:
+ expect_or_assert = "ASSERTION";
+ break;
+ }
+
+ string_stream_add(stream, "%s FAILED at %s:%d\n",
+ expect_or_assert, loc->file, loc->line);
+}
+EXPORT_SYMBOL_GPL(kunit_assert_prologue);
+
+static void kunit_assert_print_msg(const struct va_format *message,
+ struct string_stream *stream)
+{
+ if (message->fmt)
+ string_stream_add(stream, "\n%pV", message);
+}
+
+void kunit_fail_assert_format(const struct kunit_assert *assert,
+ const struct va_format *message,
+ struct string_stream *stream)
+{
+ string_stream_add(stream, "%pV", message);
+}
+EXPORT_SYMBOL_GPL(kunit_fail_assert_format);
+
+void kunit_unary_assert_format(const struct kunit_assert *assert,
+ const struct va_format *message,
+ struct string_stream *stream)
+{
+ struct kunit_unary_assert *unary_assert;
+
+ unary_assert = container_of(assert, struct kunit_unary_assert, assert);
+
+ if (unary_assert->expected_true)
+ string_stream_add(stream,
+ KUNIT_SUBTEST_INDENT "Expected %s to be true, but is false\n",
+ unary_assert->condition);
+ else
+ string_stream_add(stream,
+ KUNIT_SUBTEST_INDENT "Expected %s to be false, but is true\n",
+ unary_assert->condition);
+ kunit_assert_print_msg(message, stream);
+}
+EXPORT_SYMBOL_GPL(kunit_unary_assert_format);
+
+void kunit_ptr_not_err_assert_format(const struct kunit_assert *assert,
+ const struct va_format *message,
+ struct string_stream *stream)
+{
+ struct kunit_ptr_not_err_assert *ptr_assert;
+
+ ptr_assert = container_of(assert, struct kunit_ptr_not_err_assert,
+ assert);
+
+ if (!ptr_assert->value) {
+ string_stream_add(stream,
+ KUNIT_SUBTEST_INDENT "Expected %s is not null, but is\n",
+ ptr_assert->text);
+ } else if (IS_ERR(ptr_assert->value)) {
+ string_stream_add(stream,
+ KUNIT_SUBTEST_INDENT "Expected %s is not error, but is: %ld\n",
+ ptr_assert->text,
+ PTR_ERR(ptr_assert->value));
+ }
+ kunit_assert_print_msg(message, stream);
+}
+EXPORT_SYMBOL_GPL(kunit_ptr_not_err_assert_format);
+
+/* Checks if `text` is a literal representing `value`, e.g. "5" and 5 */
+static bool is_literal(struct kunit *test, const char *text, long long value,
+ gfp_t gfp)
+{
+ char *buffer;
+ int len;
+ bool ret;
+
+ len = snprintf(NULL, 0, "%lld", value);
+ if (strlen(text) != len)
+ return false;
+
+ buffer = kunit_kmalloc(test, len+1, gfp);
+ if (!buffer)
+ return false;
+
+ snprintf(buffer, len+1, "%lld", value);
+ ret = strncmp(buffer, text, len) == 0;
+
+ kunit_kfree(test, buffer);
+ return ret;
+}
+
+void kunit_binary_assert_format(const struct kunit_assert *assert,
+ const struct va_format *message,
+ struct string_stream *stream)
+{
+ struct kunit_binary_assert *binary_assert;
+
+ binary_assert = container_of(assert, struct kunit_binary_assert,
+ assert);
+
+ string_stream_add(stream,
+ KUNIT_SUBTEST_INDENT "Expected %s %s %s, but\n",
+ binary_assert->text->left_text,
+ binary_assert->text->operation,
+ binary_assert->text->right_text);
+ if (!is_literal(stream->test, binary_assert->text->left_text,
+ binary_assert->left_value, stream->gfp))
+ string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s == %lld (0x%llx)\n",
+ binary_assert->text->left_text,
+ binary_assert->left_value,
+ binary_assert->left_value);
+ if (!is_literal(stream->test, binary_assert->text->right_text,
+ binary_assert->right_value, stream->gfp))
+ string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s == %lld (0x%llx)",
+ binary_assert->text->right_text,
+ binary_assert->right_value,
+ binary_assert->right_value);
+ kunit_assert_print_msg(message, stream);
+}
+EXPORT_SYMBOL_GPL(kunit_binary_assert_format);
+
+void kunit_binary_ptr_assert_format(const struct kunit_assert *assert,
+ const struct va_format *message,
+ struct string_stream *stream)
+{
+ struct kunit_binary_ptr_assert *binary_assert;
+
+ binary_assert = container_of(assert, struct kunit_binary_ptr_assert,
+ assert);
+
+ string_stream_add(stream,
+ KUNIT_SUBTEST_INDENT "Expected %s %s %s, but\n",
+ binary_assert->text->left_text,
+ binary_assert->text->operation,
+ binary_assert->text->right_text);
+ string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s == %px\n",
+ binary_assert->text->left_text,
+ binary_assert->left_value);
+ string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s == %px",
+ binary_assert->text->right_text,
+ binary_assert->right_value);
+ kunit_assert_print_msg(message, stream);
+}
+EXPORT_SYMBOL_GPL(kunit_binary_ptr_assert_format);
+
+/* Checks if KUNIT_EXPECT_STREQ() args were string literals.
+ * Note: `text` will have ""s where as `value` will not.
+ */
+static bool is_str_literal(const char *text, const char *value)
+{
+ int len;
+
+ len = strlen(text);
+ if (len < 2)
+ return false;
+ if (text[0] != '\"' || text[len - 1] != '\"')
+ return false;
+
+ return strncmp(text + 1, value, len - 2) == 0;
+}
+
+void kunit_binary_str_assert_format(const struct kunit_assert *assert,
+ const struct va_format *message,
+ struct string_stream *stream)
+{
+ struct kunit_binary_str_assert *binary_assert;
+
+ binary_assert = container_of(assert, struct kunit_binary_str_assert,
+ assert);
+
+ string_stream_add(stream,
+ KUNIT_SUBTEST_INDENT "Expected %s %s %s, but\n",
+ binary_assert->text->left_text,
+ binary_assert->text->operation,
+ binary_assert->text->right_text);
+ if (!is_str_literal(binary_assert->text->left_text, binary_assert->left_value))
+ string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s == \"%s\"\n",
+ binary_assert->text->left_text,
+ binary_assert->left_value);
+ if (!is_str_literal(binary_assert->text->right_text, binary_assert->right_value))
+ string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s == \"%s\"",
+ binary_assert->text->right_text,
+ binary_assert->right_value);
+ kunit_assert_print_msg(message, stream);
+}
+EXPORT_SYMBOL_GPL(kunit_binary_str_assert_format);
+
+/* Adds a hexdump of a buffer to a string_stream comparing it with
+ * a second buffer. The different bytes are marked with <>.
+ */
+static void kunit_assert_hexdump(struct string_stream *stream,
+ const void *buf,
+ const void *compared_buf,
+ const size_t len)
+{
+ size_t i;
+ const u8 *buf1 = buf;
+ const u8 *buf2 = compared_buf;
+
+ string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT);
+
+ for (i = 0; i < len; ++i) {
+ if (!(i % 16) && i)
+ string_stream_add(stream, "\n" KUNIT_SUBSUBTEST_INDENT);
+
+ if (buf1[i] != buf2[i])
+ string_stream_add(stream, "<%02x>", buf1[i]);
+ else
+ string_stream_add(stream, " %02x ", buf1[i]);
+ }
+}
+
+void kunit_mem_assert_format(const struct kunit_assert *assert,
+ const struct va_format *message,
+ struct string_stream *stream)
+{
+ struct kunit_mem_assert *mem_assert;
+
+ mem_assert = container_of(assert, struct kunit_mem_assert,
+ assert);
+
+ if (!mem_assert->left_value) {
+ string_stream_add(stream,
+ KUNIT_SUBTEST_INDENT "Expected %s is not null, but is\n",
+ mem_assert->text->left_text);
+ } else if (!mem_assert->right_value) {
+ string_stream_add(stream,
+ KUNIT_SUBTEST_INDENT "Expected %s is not null, but is\n",
+ mem_assert->text->right_text);
+ } else {
+ string_stream_add(stream,
+ KUNIT_SUBTEST_INDENT "Expected %s %s %s, but\n",
+ mem_assert->text->left_text,
+ mem_assert->text->operation,
+ mem_assert->text->right_text);
+
+ string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s ==\n",
+ mem_assert->text->left_text);
+ kunit_assert_hexdump(stream, mem_assert->left_value,
+ mem_assert->right_value, mem_assert->size);
+
+ string_stream_add(stream, "\n");
+
+ string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s ==\n",
+ mem_assert->text->right_text);
+ kunit_assert_hexdump(stream, mem_assert->right_value,
+ mem_assert->left_value, mem_assert->size);
+
+ kunit_assert_print_msg(message, stream);
+ }
+}
+EXPORT_SYMBOL_GPL(kunit_mem_assert_format);
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