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Message-ID: <CA+GJov6hq0WsjqX1LrC2m7YS1nD37+zGmO+i1R1OajwYQZXY8w@mail.gmail.com>
Date: Mon, 13 May 2024 20:17:33 -0400
From: Rae Moar <rmoar@...gle.com>
To: Ivan Orlov <ivan.orlov0322@...il.com>
Cc: brendan.higgins@...ux.dev, davidgow@...gle.com,
linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org,
kunit-dev@...glegroups.com, skhan@...uxfoundation.org
Subject: Re: [PATCH v3] kunit: Cover 'assert.c' with tests
On Thu, May 9, 2024 at 5:05 AM Ivan Orlov <ivan.orlov0322@...il.com> wrote:
>
> There are multiple assertion formatting functions in the `assert.c`
> file, which are not covered with tests yet. Implement the KUnit test
> for these functions.
>
> The test consists of 11 test cases for the following functions:
>
> 1) 'is_literal'
> 2) 'is_str_literal'
> 3) 'kunit_assert_prologue', test case for multiple assert types
> 4) 'kunit_assert_print_msg'
> 5) 'kunit_unary_assert_format'
> 6) 'kunit_ptr_not_err_assert_format'
> 7) 'kunit_binary_assert_format'
> 8) 'kunit_binary_ptr_assert_format'
> 9) 'kunit_binary_str_assert_format'
> 10) 'kunit_assert_hexdump'
> 11) 'kunit_mem_assert_format'
>
> The test aims at maximizing the branch coverage for the assertion
> formatting functions.
>
> As you can see, it covers some of the static helper functions as
> well, so mark the static functions in `assert.c` as 'VISIBLE_IF_KUNIT'
> and conditionally export them with EXPORT_SYMBOL_IF_KUNIT. Add the
> corresponding definitions to `assert.h`.
>
> Build the assert test when CONFIG_KUNIT_TEST is enabled, similar to
> how it is done for the string stream test.
Hello!
This looks great to me! Thanks for all your work on this! There is
just one comment I have below. Once that is fixed up, I am happy to
add a reviewed-by.
Thanks!
-Rae
>
> Signed-off-by: Ivan Orlov <ivan.orlov0322@...il.com>
> ---
> V1 -> V2:
> - Check the output from the string stream for containing the key parts
> instead of comparing the results with expected strings char by char, as
> it was suggested by Rae Moar <rmoar@...gle.com>. Define two macros to
> make it possible (ASSERT_TEST_EXPECT_CONTAIN and
> ASSERT_TEST_EXPECT_NCONTAIN).
> - Mark the static functions in `assert.c` as VISIBLE_IF_KUNIT and export
> them conditionally if kunit is enabled instead of including the
> `assert_test.c` file in the end of `assert.c`. This way we will decouple
> the test from the implementation (SUT).
> - Update the kunit_assert_hexdump test: now it checks for presense of
> the brackets '<>' around the non-matching bytes, instead of comparing
> the kunit_assert_hexdump output char by char.
> V2 -> V3:
> - Make test case array and test suite definitions static
> - Change the condition in `assert.h`: we should declare VISIBLE_IF_KUNIT
> functions in the header file when CONFIG_KUNIT is enabled, not
> CONFIG_KUNIT_TEST. Otherwise, if CONFIG_KUNIT_TEST is disabled,
> VISIBLE_IF_KUNIT functions in the `assert.c` are not static, and
> prototypes for them can't be found.
> - Add MODULE_LICENSE and MODULE_DESCRIPTION macros
>
> include/kunit/assert.h | 11 ++
> lib/kunit/Makefile | 1 +
> lib/kunit/assert.c | 24 ++-
> lib/kunit/assert_test.c | 391 ++++++++++++++++++++++++++++++++++++++++
> 4 files changed, 419 insertions(+), 8 deletions(-)
> create mode 100644 lib/kunit/assert_test.c
>
> diff --git a/include/kunit/assert.h b/include/kunit/assert.h
> index 24c2b9fa61e8..7e7490a74b13 100644
> --- a/include/kunit/assert.h
> +++ b/include/kunit/assert.h
> @@ -218,4 +218,15 @@ void kunit_mem_assert_format(const struct kunit_assert *assert,
> const struct va_format *message,
> struct string_stream *stream);
>
> +#if IS_ENABLED(CONFIG_KUNIT)
> +void kunit_assert_print_msg(const struct va_format *message,
> + struct string_stream *stream);
> +bool is_literal(const char *text, long long value);
> +bool is_str_literal(const char *text, const char *value);
> +void kunit_assert_hexdump(struct string_stream *stream,
> + const void *buf,
> + const void *compared_buf,
> + const size_t len);
> +#endif
> +
> #endif /* _KUNIT_ASSERT_H */
> diff --git a/lib/kunit/Makefile b/lib/kunit/Makefile
> index 309659a32a78..be7c9903936f 100644
> --- a/lib/kunit/Makefile
> +++ b/lib/kunit/Makefile
> @@ -18,6 +18,7 @@ endif
> obj-y += hooks.o
>
> obj-$(CONFIG_KUNIT_TEST) += kunit-test.o
> +obj-$(CONFIG_KUNIT_TEST) += assert_test.o
>
> # string-stream-test compiles built-in only.
> ifeq ($(CONFIG_KUNIT_TEST),y)
> diff --git a/lib/kunit/assert.c b/lib/kunit/assert.c
> index dd1d633d0fe2..382eb409d34b 100644
> --- a/lib/kunit/assert.c
> +++ b/lib/kunit/assert.c
> @@ -7,6 +7,7 @@
> */
> #include <kunit/assert.h>
> #include <kunit/test.h>
> +#include <kunit/visibility.h>
>
> #include "string-stream.h"
>
> @@ -30,12 +31,14 @@ void kunit_assert_prologue(const struct kunit_loc *loc,
> }
> EXPORT_SYMBOL_GPL(kunit_assert_prologue);
>
> -static void kunit_assert_print_msg(const struct va_format *message,
> - struct string_stream *stream)
> +VISIBLE_IF_KUNIT
> +void kunit_assert_print_msg(const struct va_format *message,
> + struct string_stream *stream)
> {
> if (message->fmt)
> string_stream_add(stream, "\n%pV", message);
> }
> +EXPORT_SYMBOL_IF_KUNIT(kunit_assert_print_msg);
>
> void kunit_fail_assert_format(const struct kunit_assert *assert,
> const struct va_format *message,
> @@ -89,7 +92,7 @@ void kunit_ptr_not_err_assert_format(const struct kunit_assert *assert,
> 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(const char *text, long long value)
> +VISIBLE_IF_KUNIT bool is_literal(const char *text, long long value)
> {
> char *buffer;
> int len;
> @@ -110,6 +113,7 @@ static bool is_literal(const char *text, long long value)
>
> return ret;
> }
> +EXPORT_SYMBOL_IF_KUNIT(is_literal);
>
> void kunit_binary_assert_format(const struct kunit_assert *assert,
> const struct va_format *message,
> @@ -166,7 +170,7 @@ 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)
> +VISIBLE_IF_KUNIT bool is_str_literal(const char *text, const char *value)
> {
> int len;
>
> @@ -178,6 +182,7 @@ static bool is_str_literal(const char *text, const char *value)
>
> return strncmp(text + 1, value, len - 2) == 0;
> }
> +EXPORT_SYMBOL_IF_KUNIT(is_str_literal);
>
> void kunit_binary_str_assert_format(const struct kunit_assert *assert,
> const struct va_format *message,
> @@ -208,10 +213,11 @@ 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)
> +VISIBLE_IF_KUNIT
> +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;
> @@ -229,6 +235,7 @@ static void kunit_assert_hexdump(struct string_stream *stream,
> string_stream_add(stream, " %02x ", buf1[i]);
> }
> }
> +EXPORT_SYMBOL_IF_KUNIT(kunit_assert_hexdump);
>
> void kunit_mem_assert_format(const struct kunit_assert *assert,
> const struct va_format *message,
> @@ -269,4 +276,5 @@ void kunit_mem_assert_format(const struct kunit_assert *assert,
> kunit_assert_print_msg(message, stream);
> }
> }
> +
> EXPORT_SYMBOL_GPL(kunit_mem_assert_format);
> diff --git a/lib/kunit/assert_test.c b/lib/kunit/assert_test.c
> new file mode 100644
> index 000000000000..1347a964204b
> --- /dev/null
> +++ b/lib/kunit/assert_test.c
> @@ -0,0 +1,391 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * KUnit test for the assertion formatting functions.
> + * Author: Ivan Orlov <ivan.orlov0322@...il.com>
> + */
> +#include <kunit/test.h>
> +#include "string-stream.h"
> +
> +#define TEST_PTR_EXPECTED_BUF_SIZE 32
> +#define HEXDUMP_TEST_BUF_LEN 5
> +#define ASSERT_TEST_EXPECT_CONTAIN(test, str, substr) KUNIT_EXPECT_TRUE(test, strstr(str, substr))
> +#define ASSERT_TEST_EXPECT_NCONTAIN(test, str, substr) KUNIT_EXPECT_FALSE(test, strstr(str, substr))
> +
> +static void kunit_test_is_literal(struct kunit *test)
> +{
> + KUNIT_EXPECT_TRUE(test, is_literal("5", 5));
> + KUNIT_EXPECT_TRUE(test, is_literal("0", 0));
> + KUNIT_EXPECT_TRUE(test, is_literal("1234567890", 1234567890));
> + KUNIT_EXPECT_TRUE(test, is_literal("-1234567890", -1234567890));
> + KUNIT_EXPECT_FALSE(test, is_literal("05", 5));
> + KUNIT_EXPECT_FALSE(test, is_literal("", 0));
> + KUNIT_EXPECT_FALSE(test, is_literal("-0", 0));
> + KUNIT_EXPECT_FALSE(test, is_literal("12#45", 1245));
> +}
> +
> +static void kunit_test_is_str_literal(struct kunit *test)
> +{
> + KUNIT_EXPECT_TRUE(test, is_str_literal("\"Hello, World!\"", "Hello, World!"));
> + KUNIT_EXPECT_TRUE(test, is_str_literal("\"\"", ""));
> + KUNIT_EXPECT_TRUE(test, is_str_literal("\"\"\"", "\""));
> + KUNIT_EXPECT_FALSE(test, is_str_literal("", ""));
> + KUNIT_EXPECT_FALSE(test, is_str_literal("\"", "\""));
> + KUNIT_EXPECT_FALSE(test, is_str_literal("\"Abacaba", "Abacaba"));
> + KUNIT_EXPECT_FALSE(test, is_str_literal("Abacaba\"", "Abacaba"));
> + KUNIT_EXPECT_FALSE(test, is_str_literal("\"Abacaba\"", "\"Abacaba\""));
> +}
> +
> +KUNIT_DEFINE_ACTION_WRAPPER(kfree_wrapper, kfree, const void *);
> +
> +/* this function is used to get a "char *" string from the string stream and defer its cleanup */
> +static char *get_str_from_stream(struct kunit *test, struct string_stream *stream)
> +{
> + char *str = string_stream_get_string(stream);
> +
When trying to make the kernel with this test loaded in, I am getting
an error that string_stream_get_string, string_stream_clear, and
kunit_alloc_string_stream are undefined.
So either these three methods will have to be exported using
EXPORT_SYMBOL_KUNIT or this test cannot be loaded and run as a module.
But once this is fixed up this should be good to go.
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, str);
> + kunit_add_action(test, kfree_wrapper, (void *)str);
> +
> + return str;
> +}
> +
> +static void kunit_test_assert_prologue(struct kunit *test)
> +{
> + struct string_stream *stream;
> + char *str;
> + const struct kunit_loc location = {
> + .file = "testfile.c",
> + .line = 1337,
> + };
> +
> + stream = kunit_alloc_string_stream(test, GFP_KERNEL);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, stream);
> +
> + /* Test an expectation fail prologue */
> + kunit_assert_prologue(&location, KUNIT_EXPECTATION, stream);
> + str = get_str_from_stream(test, stream);
> + ASSERT_TEST_EXPECT_CONTAIN(test, str, "EXPECTATION");
> + ASSERT_TEST_EXPECT_CONTAIN(test, str, "testfile.c");
> + ASSERT_TEST_EXPECT_CONTAIN(test, str, "1337");
> +
> + /* Test an assertion fail prologue */
> + string_stream_clear(stream);
> + kunit_assert_prologue(&location, KUNIT_ASSERTION, stream);
> + str = get_str_from_stream(test, stream);
> + ASSERT_TEST_EXPECT_CONTAIN(test, str, "ASSERTION");
> + ASSERT_TEST_EXPECT_CONTAIN(test, str, "testfile.c");
> + ASSERT_TEST_EXPECT_CONTAIN(test, str, "1337");
> +}
> +
> +/*
> + * This function accepts an arbitrary count of parameters and generates a va_format struct,
> + * which can be used to validate kunit_assert_print_msg function
> + */
> +static void verify_assert_print_msg(struct kunit *test,
> + struct string_stream *stream,
> + char *expected, const char *format, ..)
> +{
> + va_list list;
> + const struct va_format vformat = {
> + .fmt = format,
> + .va = &list,
> + };
> +
> + va_start(list, format);
> + string_stream_clear(stream);
> + kunit_assert_print_msg(&vformat, stream);
> + KUNIT_EXPECT_STREQ(test, get_str_from_stream(test, stream), expected);
> +}
> +
> +static void kunit_test_assert_print_msg(struct kunit *test)
> +{
> + struct string_stream *stream;
> +
> + stream = kunit_alloc_string_stream(test, GFP_KERNEL);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, stream);
> +
> + verify_assert_print_msg(test, stream, "\nTest", "Test");
> + verify_assert_print_msg(test, stream, "\nAbacaba -123 234", "%s %d %u",
> + "Abacaba", -123, 234U);
> + verify_assert_print_msg(test, stream, "", NULL);
> +}
> +
> +/*
> + * Further code contains the tests for different assert format functions.
> + * This helper function accepts the assert format function, executes it and
> + * validates the result string from the stream by checking that all of the
> + * substrings exist in the output.
> + */
> +static void validate_assert(assert_format_t format_func, struct kunit *test,
> + const struct kunit_assert *assert,
> + struct string_stream *stream, int num_checks, ...)
> +{
> + size_t i;
> + va_list checks;
> + char *cur_substr_exp;
> + struct va_format message = { NULL, NULL };
> +
> + va_start(checks, num_checks);
> + string_stream_clear(stream);
> + format_func(assert, &message, stream);
> +
> + for (i = 0; i < num_checks; i++) {
> + cur_substr_exp = va_arg(checks, char *);
> + ASSERT_TEST_EXPECT_CONTAIN(test, get_str_from_stream(test, stream), cur_substr_exp);
> + }
> +}
> +
> +static void kunit_test_unary_assert_format(struct kunit *test)
> +{
> + struct string_stream *stream;
> + struct kunit_assert assert = {};
> + struct kunit_unary_assert un_assert = {
> + .assert = assert,
> + .condition = "expr",
> + .expected_true = true,
> + };
> +
> + stream = kunit_alloc_string_stream(test, GFP_KERNEL);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, stream);
> +
> + validate_assert(kunit_unary_assert_format, test, &un_assert.assert,
> + stream, 2, "true", "is false");
> +
> + un_assert.expected_true = false;
> + validate_assert(kunit_unary_assert_format, test, &un_assert.assert,
> + stream, 2, "false", "is true");
> +}
> +
> +static void kunit_test_ptr_not_err_assert_format(struct kunit *test)
> +{
> + struct string_stream *stream;
> + struct kunit_assert assert = {};
> + struct kunit_ptr_not_err_assert not_err_assert = {
> + .assert = assert,
> + .text = "expr",
> + .value = NULL,
> + };
> +
> + stream = kunit_alloc_string_stream(test, GFP_KERNEL);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, stream);
> +
> + /* Value is NULL. The corresponding message should be printed out */
> + validate_assert(kunit_ptr_not_err_assert_format, test,
> + ¬_err_assert.assert,
> + stream, 1, "null");
> +
> + /* Value is not NULL, but looks like an error pointer. Error should be printed out */
> + not_err_assert.value = (void *)-12;
> + validate_assert(kunit_ptr_not_err_assert_format, test,
> + ¬_err_assert.assert, stream, 2,
> + "error", "-12");
> +}
> +
> +static void kunit_test_binary_assert_format(struct kunit *test)
> +{
> + struct string_stream *stream;
> + struct kunit_assert assert = {};
> + struct kunit_binary_assert_text text = {
> + .left_text = "1 + 2",
> + .operation = "==",
> + .right_text = "2",
> + };
> + const struct kunit_binary_assert binary_assert = {
> + .assert = assert,
> + .text = &text,
> + .left_value = 3,
> + .right_value = 2,
> + };
> +
> + stream = kunit_alloc_string_stream(test, GFP_KERNEL);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, stream);
> +
> + /*
> + * Printed values should depend on the input we provide: the left text, right text, left
> + * value and the right value.
> + */
> + validate_assert(kunit_binary_assert_format, test, &binary_assert.assert,
> + stream, 4, "1 + 2", "2", "3", "==");
> +
> + text.right_text = "4 - 2";
> + validate_assert(kunit_binary_assert_format, test, &binary_assert.assert,
> + stream, 3, "==", "1 + 2", "4 - 2");
> +
> + text.left_text = "3";
> + validate_assert(kunit_binary_assert_format, test, &binary_assert.assert,
> + stream, 4, "3", "4 - 2", "2", "==");
> +
> + text.right_text = "2";
> + validate_assert(kunit_binary_assert_format, test, &binary_assert.assert,
> + stream, 3, "3", "2", "==");
> +}
> +
> +static void kunit_test_binary_ptr_assert_format(struct kunit *test)
> +{
> + struct string_stream *stream;
> + struct kunit_assert assert = {};
> + char *addr_var_a, *addr_var_b;
> + static const void *var_a = (void *)0xDEADBEEF;
> + static const void *var_b = (void *)0xBADDCAFE;
> + struct kunit_binary_assert_text text = {
> + .left_text = "var_a",
> + .operation = "==",
> + .right_text = "var_b",
> + };
> + struct kunit_binary_ptr_assert binary_ptr_assert = {
> + .assert = assert,
> + .text = &text,
> + .left_value = var_a,
> + .right_value = var_b,
> + };
> +
> + addr_var_a = kunit_kzalloc(test, TEST_PTR_EXPECTED_BUF_SIZE, GFP_KERNEL);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, addr_var_a);
> + addr_var_b = kunit_kzalloc(test, TEST_PTR_EXPECTED_BUF_SIZE, GFP_KERNEL);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, addr_var_b);
> + /*
> + * Print the addresses to the buffers first.
> + * This is necessary as we may have different count of leading zeros in the pointer
> + * on different architectures.
> + */
> + snprintf(addr_var_a, TEST_PTR_EXPECTED_BUF_SIZE, "%px", var_a);
> + snprintf(addr_var_b, TEST_PTR_EXPECTED_BUF_SIZE, "%px", var_b);
> +
> + stream = kunit_alloc_string_stream(test, GFP_KERNEL);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, stream);
> + validate_assert(kunit_binary_ptr_assert_format, test, &binary_ptr_assert.assert,
> + stream, 3, addr_var_a, addr_var_b, "==");
> +}
> +
> +static void kunit_test_binary_str_assert_format(struct kunit *test)
> +{
> + struct string_stream *stream;
> + struct kunit_assert assert = {};
> + static const char *var_a = "abacaba";
> + static const char *var_b = "kernel";
> + struct kunit_binary_assert_text text = {
> + .left_text = "var_a",
> + .operation = "==",
> + .right_text = "var_b",
> + };
> + struct kunit_binary_str_assert binary_str_assert = {
> + .assert = assert,
> + .text = &text,
> + .left_value = var_a,
> + .right_value = var_b,
> + };
> +
> + stream = kunit_alloc_string_stream(test, GFP_KERNEL);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, stream);
> +
> + validate_assert(kunit_binary_str_assert_format, test,
> + &binary_str_assert.assert,
> + stream, 5, "var_a", "var_b", "\"abacaba\"",
> + "\"kernel\"", "==");
> +
> + text.left_text = "\"abacaba\"";
> + validate_assert(kunit_binary_str_assert_format, test, &binary_str_assert.assert,
> + stream, 4, "\"abacaba\"", "var_b", "\"kernel\"", "==");
> +
> + text.right_text = "\"kernel\"";
> + validate_assert(kunit_binary_str_assert_format, test, &binary_str_assert.assert,
> + stream, 3, "\"abacaba\"", "\"kernel\"", "==");
> +}
> +
> +static const u8 hex_testbuf1[] = { 0x26, 0x74, 0x6b, 0x9c, 0x55,
> + 0x45, 0x9d, 0x47, 0xd6, 0x47,
> + 0x2, 0x89, 0x8c, 0x81, 0x94,
> + 0x12, 0xfe, 0x01 };
> +static const u8 hex_testbuf2[] = { 0x26, 0x74, 0x6b, 0x9c, 0x55,
> + 0x45, 0x9d, 0x47, 0x21, 0x47,
> + 0xcd, 0x89, 0x24, 0x50, 0x94,
> + 0x12, 0xba, 0x01 };
> +static void kunit_test_assert_hexdump(struct kunit *test)
> +{
> + struct string_stream *stream;
> + char *str;
> + size_t i;
> + char buf[HEXDUMP_TEST_BUF_LEN];
> +
> + stream = kunit_alloc_string_stream(test, GFP_KERNEL);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, stream);
> + /* Check that we are getting output like <xx> for non-matching numbers. */
> + kunit_assert_hexdump(stream, hex_testbuf1, hex_testbuf2, sizeof(hex_testbuf1));
> + str = get_str_from_stream(test, stream);
> + for (i = 0; i < sizeof(hex_testbuf1); i++) {
> + snprintf(buf, HEXDUMP_TEST_BUF_LEN, "<%02x>", hex_testbuf1[i]);
> + if (hex_testbuf1[i] != hex_testbuf2[i])
> + ASSERT_TEST_EXPECT_CONTAIN(test, str, buf);
> + }
> + /* We shouldn't get any <xx> numbers when comparing the buffer with itself. */
> + string_stream_clear(stream);
> + kunit_assert_hexdump(stream, hex_testbuf1, hex_testbuf1, sizeof(hex_testbuf1));
> + str = get_str_from_stream(test, stream);
> + ASSERT_TEST_EXPECT_NCONTAIN(test, str, "<");
> + ASSERT_TEST_EXPECT_NCONTAIN(test, str, ">");
> +}
> +
> +static void kunit_test_mem_assert_format(struct kunit *test)
> +{
> + struct string_stream *stream;
> + struct string_stream *expected_stream;
> + struct kunit_assert assert = {};
> + static const struct kunit_binary_assert_text text = {
> + .left_text = "hex_testbuf1",
> + .operation = "==",
> + .right_text = "hex_testbuf2",
> + };
> + struct kunit_mem_assert mem_assert = {
> + .assert = assert,
> + .text = &text,
> + .left_value = NULL,
> + .right_value = hex_testbuf2,
> + .size = sizeof(hex_testbuf1),
> + };
> +
> + expected_stream = kunit_alloc_string_stream(test, GFP_KERNEL);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, expected_stream);
> + stream = kunit_alloc_string_stream(test, GFP_KERNEL);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, stream);
> +
> + /* The left value is NULL */
> + validate_assert(kunit_mem_assert_format, test, &mem_assert.assert,
> + stream, 2, "hex_testbuf1", "is not null");
> +
> + /* The right value is NULL, the left value is not NULL */
> + mem_assert.left_value = hex_testbuf1;
> + mem_assert.right_value = NULL;
> + validate_assert(kunit_mem_assert_format, test, &mem_assert.assert,
> + stream, 2, "hex_testbuf2", "is not null");
> +
> + /* Both arguments are not null */
> + mem_assert.left_value = hex_testbuf1;
> + mem_assert.right_value = hex_testbuf2;
> +
> + validate_assert(kunit_mem_assert_format, test, &mem_assert.assert,
> + stream, 3, "hex_testbuf1", "hex_testbuf2", "==");
> +}
> +
> +static struct kunit_case assert_test_cases[] = {
> + KUNIT_CASE(kunit_test_is_literal),
> + KUNIT_CASE(kunit_test_is_str_literal),
> + KUNIT_CASE(kunit_test_assert_prologue),
> + KUNIT_CASE(kunit_test_assert_print_msg),
> + KUNIT_CASE(kunit_test_unary_assert_format),
> + KUNIT_CASE(kunit_test_ptr_not_err_assert_format),
> + KUNIT_CASE(kunit_test_binary_assert_format),
> + KUNIT_CASE(kunit_test_binary_ptr_assert_format),
> + KUNIT_CASE(kunit_test_binary_str_assert_format),
> + KUNIT_CASE(kunit_test_assert_hexdump),
> + KUNIT_CASE(kunit_test_mem_assert_format),
> + {}
> +};
> +
> +static struct kunit_suite assert_test_suite = {
> + .name = "kunit-assert",
> + .test_cases = assert_test_cases,
> +};
> +
> +MODULE_IMPORT_NS(EXPORTED_FOR_KUNIT_TESTING);
> +kunit_test_suites(&assert_test_suite);
> +MODULE_LICENSE("GPL");
> +MODULE_DESCRIPTION("Test for the KUnit assertion format functions.");
> --
> 2.34.1
>
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