diff options
| -rw-r--r-- | include/kunit/assert.h | 33 | ||||
| -rw-r--r-- | include/kunit/test.h | 87 | ||||
| -rw-r--r-- | lib/kunit/assert.c | 56 |
3 files changed, 176 insertions, 0 deletions
diff --git a/include/kunit/assert.h b/include/kunit/assert.h index ace3de8d1ee7..e8a59487fd59 100644 --- a/include/kunit/assert.h +++ b/include/kunit/assert.h @@ -240,4 +240,37 @@ void kunit_binary_str_assert_format(const struct kunit_assert *assert, const struct va_format *message, struct string_stream *stream); +#define KUNIT_INIT_MEM_ASSERT_STRUCT(text_, left_val, right_val, size_) { \ + .text = text_, \ + .left_value = left_val, \ + .right_value = right_val, \ + .size = size_ \ +} + +/** + * struct kunit_mem_assert - An expectation/assertion that compares two + * memory blocks. + * @assert: The parent of this type. + * @text: Holds the textual representations of the operands and comparator. + * @left_value: The actual evaluated value of the expression in the left slot. + * @right_value: The actual evaluated value of the expression in the right slot. + * @size: Size of the memory block analysed in bytes. + * + * Represents an expectation/assertion that compares two memory blocks. For + * example, to expect that the first three bytes of foo is equal to the + * first three bytes of bar, you can use the expectation + * KUNIT_EXPECT_MEMEQ(test, foo, bar, 3); + */ +struct kunit_mem_assert { + struct kunit_assert assert; + const struct kunit_binary_assert_text *text; + const void *left_value; + const void *right_value; + const size_t size; +}; + +void kunit_mem_assert_format(const struct kunit_assert *assert, + const struct va_format *message, + struct string_stream *stream); + #endif /* _KUNIT_ASSERT_H */ diff --git a/include/kunit/test.h b/include/kunit/test.h index b1ab6b32216d..cde97dc4eed5 100644 --- a/include/kunit/test.h +++ b/include/kunit/test.h @@ -658,6 +658,39 @@ do { \ ##__VA_ARGS__); \ } while (0) +#define KUNIT_MEM_ASSERTION(test, \ + assert_type, \ + left, \ + op, \ + right, \ + size, \ + fmt, \ + ...) \ +do { \ + const void *__left = (left); \ + const void *__right = (right); \ + const size_t __size = (size); \ + static const struct kunit_binary_assert_text __text = { \ + .operation = #op, \ + .left_text = #left, \ + .right_text = #right, \ + }; \ + \ + if (likely(memcmp(__left, __right, __size) op 0)) \ + break; \ + \ + _KUNIT_FAILED(test, \ + assert_type, \ + kunit_mem_assert, \ + kunit_mem_assert_format, \ + KUNIT_INIT_MEM_ASSERT_STRUCT(&__text, \ + __left, \ + __right, \ + __size), \ + fmt, \ + ##__VA_ARGS__); \ +} while (0) + #define KUNIT_PTR_NOT_ERR_OR_NULL_MSG_ASSERTION(test, \ assert_type, \ ptr, \ @@ -929,6 +962,60 @@ do { \ ##__VA_ARGS__) /** + * KUNIT_EXPECT_MEMEQ() - Expects that the first @size bytes of @left and @right are equal. + * @test: The test context object. + * @left: An arbitrary expression that evaluates to the specified size. + * @right: An arbitrary expression that evaluates to the specified size. + * @size: Number of bytes compared. + * + * Sets an expectation that the values that @left and @right evaluate to are + * equal. This is semantically equivalent to + * KUNIT_EXPECT_TRUE(@test, !memcmp((@left), (@right), (@size))). See + * KUNIT_EXPECT_TRUE() for more information. + * + * Although this expectation works for any memory block, it is not recommended + * for comparing more structured data, such as structs. This expectation is + * recommended for comparing, for example, data arrays. + */ +#define KUNIT_EXPECT_MEMEQ(test, left, right, size) \ + KUNIT_EXPECT_MEMEQ_MSG(test, left, right, size, NULL) + +#define KUNIT_EXPECT_MEMEQ_MSG(test, left, right, size, fmt, ...) \ + KUNIT_MEM_ASSERTION(test, \ + KUNIT_EXPECTATION, \ + left, ==, right, \ + size, \ + fmt, \ + ##__VA_ARGS__) + +/** + * KUNIT_EXPECT_MEMNEQ() - Expects that the first @size bytes of @left and @right are not equal. + * @test: The test context object. + * @left: An arbitrary expression that evaluates to the specified size. + * @right: An arbitrary expression that evaluates to the specified size. + * @size: Number of bytes compared. + * + * Sets an expectation that the values that @left and @right evaluate to are + * not equal. This is semantically equivalent to + * KUNIT_EXPECT_TRUE(@test, memcmp((@left), (@right), (@size))). See + * KUNIT_EXPECT_TRUE() for more information. + * + * Although this expectation works for any memory block, it is not recommended + * for comparing more structured data, such as structs. This expectation is + * recommended for comparing, for example, data arrays. + */ +#define KUNIT_EXPECT_MEMNEQ(test, left, right, size) \ + KUNIT_EXPECT_MEMNEQ_MSG(test, left, right, size, NULL) + +#define KUNIT_EXPECT_MEMNEQ_MSG(test, left, right, size, fmt, ...) \ + KUNIT_MEM_ASSERTION(test, \ + KUNIT_EXPECTATION, \ + left, !=, right, \ + size, \ + fmt, \ + ##__VA_ARGS__) + +/** * KUNIT_EXPECT_NULL() - Expects that @ptr is null. * @test: The test context object. * @ptr: an arbitrary pointer. diff --git a/lib/kunit/assert.c b/lib/kunit/assert.c index 24dec5b48722..f5b50babe38d 100644 --- a/lib/kunit/assert.c +++ b/lib/kunit/assert.c @@ -206,3 +206,59 @@ void kunit_binary_str_assert_format(const struct kunit_assert *assert, 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); + + 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); |