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Documentation/dev-tools: Add kselftest_harness documentation 

Add ReST metadata to kselftest_harness.h to be able to include the
comments in the Sphinx documentation.

Signed-off-by: Mickaël Salaün <mic@digikod.net>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kees Cook <keescook@chromium.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Will Drewry <wad@chromium.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
This commit is contained in:
Mickaël Salaün 2017-06-05 20:37:17 +02:00 committed by Shuah Khan
parent 1256a52557
commit 7e6a32abdd
2 changed files with 363 additions and 85 deletions
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33
Documentation/dev-tools/kselftest.rst
View File

@ -120,3 +120,36 @@ Contributing new tests (details)
executable which is not tested by default.
TEST_FILES, TEST_GEN_FILES mean it is the file which is used by
test.
Test Harness
============
The kselftest_harness.h file contains useful helpers to build tests. The tests
from tools/testing/selftests/seccomp/seccomp_bpf.c can be used as example.
Example
-------
.. kernel-doc:: tools/testing/selftests/kselftest_harness.h
:doc: example
Helpers
-------
.. kernel-doc:: tools/testing/selftests/kselftest_harness.h
:functions: TH_LOG TEST TEST_SIGNAL FIXTURE FIXTURE_DATA FIXTURE_SETUP
FIXTURE_TEARDOWN TEST_F TEST_HARNESS_MAIN
Operators
---------
.. kernel-doc:: tools/testing/selftests/kselftest_harness.h
:doc: operators
.. kernel-doc:: tools/testing/selftests/kselftest_harness.h
:functions: ASSERT_EQ ASSERT_NE ASSERT_LT ASSERT_LE ASSERT_GT ASSERT_GE
ASSERT_NULL ASSERT_TRUE ASSERT_NULL ASSERT_TRUE ASSERT_FALSE
ASSERT_STREQ ASSERT_STRNE EXPECT_EQ EXPECT_NE EXPECT_LT
EXPECT_LE EXPECT_GT EXPECT_GE EXPECT_NULL EXPECT_TRUE
EXPECT_FALSE EXPECT_STREQ EXPECT_STRNE

415
tools/testing/selftests/kselftest_harness.h
View File

@ -4,41 +4,49 @@
*
* kselftest_harness.h: simple C unit test helper.
*
* Usage:
* #include "../kselftest_harness.h"
* TEST(standalone_test) {
* do_some_stuff;
* EXPECT_GT(10, stuff) {
* stuff_state_t state;
* enumerate_stuff_state(&state);
* TH_LOG("expectation failed with state: %s", state.msg);
* }
* more_stuff;
* ASSERT_NE(some_stuff, NULL) TH_LOG("how did it happen?!");
* last_stuff;
* EXPECT_EQ(0, last_stuff);
* }
*
* FIXTURE(my_fixture) {
* mytype_t *data;
* int awesomeness_level;
* };
* FIXTURE_SETUP(my_fixture) {
* self->data = mytype_new();
* ASSERT_NE(NULL, self->data);
* }
* FIXTURE_TEARDOWN(my_fixture) {
* mytype_free(self->data);
* }
* TEST_F(my_fixture, data_is_good) {
* EXPECT_EQ(1, is_my_data_good(self->data));
* }
*
* TEST_HARNESS_MAIN
* See documentation in Documentation/dev-tools/kselftest.rst
*
* API inspired by code.google.com/p/googletest
*/
/**
* DOC: example
*
* .. code-block:: c
*
* #include "../kselftest_harness.h"
*
* TEST(standalone_test) {
* do_some_stuff;
* EXPECT_GT(10, stuff) {
* stuff_state_t state;
* enumerate_stuff_state(&state);
* TH_LOG("expectation failed with state: %s", state.msg);
* }
* more_stuff;
* ASSERT_NE(some_stuff, NULL) TH_LOG("how did it happen?!");
* last_stuff;
* EXPECT_EQ(0, last_stuff);
* }
*
* FIXTURE(my_fixture) {
* mytype_t *data;
* int awesomeness_level;
* };
* FIXTURE_SETUP(my_fixture) {
* self->data = mytype_new();
* ASSERT_NE(NULL, self->data);
* }
* FIXTURE_TEARDOWN(my_fixture) {
* mytype_free(self->data);
* }
* TEST_F(my_fixture, data_is_good) {
* EXPECT_EQ(1, is_my_data_good(self->data));
* }
*
* TEST_HARNESS_MAIN
*/
#ifndef __KSELFTEST_HARNESS_H
#define __KSELFTEST_HARNESS_H
@ -61,10 +69,20 @@
# define TH_LOG_ENABLED 1
#endif
/* TH_LOG(format, ...)
/**
* TH_LOG(fmt, ...)
*
* @fmt: format string
* @...: optional arguments
*
* .. code-block:: c
*
* TH_LOG(format, ...)
*
* Optional debug logging function available for use in tests.
* Logging may be enabled or disabled by defining TH_LOG_ENABLED.
* E.g., #define TH_LOG_ENABLED 1
*
* If no definition is provided, logging is enabled by default.
*/
#define TH_LOG(fmt, ...) do { \
@ -77,7 +95,16 @@
fprintf(TH_LOG_STREAM, "%s:%d:%s:" fmt "\n", \
__FILE__, __LINE__, _metadata->name, ##__VA_ARGS__)
/* TEST(name) { implementation }
/**
* TEST(test_name) - Defines the test function and creates the registration
* stub
*
* @test_name: test name
*
* .. code-block:: c
*
* TEST(name) { implementation }
*
* Defines a test by name.
* Names must be unique and tests must not be run in parallel. The
* implementation containing block is a function and scoping should be treated
@ -85,10 +112,18 @@
*
* EXPECT_* and ASSERT_* are valid in a TEST() { } context.
*/
/* Defines the test function and creates the registration stub. */
#define TEST(test_name) __TEST_IMPL(test_name, -1)
/* TEST_SIGNAL(name, signal) { implementation }
/**
* TEST_SIGNAL(test_name, signal)
*
* @test_name: test name
* @signal: signal number
*
* .. code-block:: c
*
* TEST_SIGNAL(name, signal) { implementation }
*
* Defines a test by name and the expected term signal.
* Names must be unique and tests must not be run in parallel. The
* implementation containing block is a function and scoping should be treated
@ -110,22 +145,38 @@
static void test_name( \
struct __test_metadata __attribute__((unused)) *_metadata)
/* FIXTURE_DATA(datatype name)
/**
* FIXTURE_DATA(datatype_name) - Wraps the struct name so we have one less
* argument to pass around
*
* @datatype_name: datatype name
*
* .. code-block:: c
*
* FIXTURE_DATA(datatype name)
*
* This call may be used when the type of the fixture data
* is needed. In general, this should not be needed unless
* the |self| is being passed to a helper directly.
* the *self* is being passed to a helper directly.
*/
/* Wraps the struct name so we have one less argument to pass around. */
#define FIXTURE_DATA(datatype_name) struct _test_data_##datatype_name
/* FIXTURE(datatype name) {
* type property1;
* ...
* };
* Defines the data provided to TEST_F()-defined tests as |self|. It should be
* populated and cleaned up using FIXTURE_SETUP and FIXTURE_TEARDOWN.
/**
* FIXTURE(fixture_name) - Called once per fixture to setup the data and
* register
*
* @fixture_name: fixture name
*
* .. code-block:: c
*
* FIXTURE(datatype name) {
* type property1;
* ...
* };
*
* Defines the data provided to TEST_F()-defined tests as *self*. It should be
* populated and cleaned up using FIXTURE_SETUP() and FIXTURE_TEARDOWN().
*/
/* Called once per fixture to setup the data and register. */
#define FIXTURE(fixture_name) \
static void __attribute__((constructor)) \
_register_##fixture_name##_data(void) \
@ -134,9 +185,18 @@
} \
FIXTURE_DATA(fixture_name)
/* FIXTURE_SETUP(fixture name) { implementation }
/**
* FIXTURE_SETUP(fixture_name) - Prepares the setup function for the fixture.
* *_metadata* is included so that ASSERT_* work as a convenience
*
* @fixture_name: fixture name
*
* .. code-block:: c
*
* FIXTURE_SETUP(fixture name) { implementation }
*
* Populates the required "setup" function for a fixture. An instance of the
* datatype defined with _FIXTURE_DATA will be exposed as |self| for the
* datatype defined with FIXTURE_DATA() will be exposed as *self* for the
* implementation.
*
* ASSERT_* are valid for use in this context and will prempt the execution
@ -144,16 +204,21 @@
*
* A bare "return;" statement may be used to return early.
*/
/* Prepares the setup function for the fixture. |_metadata| is included
* so that ASSERT_* work as a convenience.
*/
#define FIXTURE_SETUP(fixture_name) \
void fixture_name##_setup( \
struct __test_metadata __attribute__((unused)) *_metadata, \
FIXTURE_DATA(fixture_name) __attribute__((unused)) *self)
/* FIXTURE_TEARDOWN(fixture name) { implementation }
/**
* FIXTURE_TEARDOWN(fixture_name)
*
* @fixture_name: fixture name
*
* .. code-block:: c
*
* FIXTURE_TEARDOWN(fixture name) { implementation }
*
* Populates the required "teardown" function for a fixture. An instance of the
* datatype defined with _FIXTURE_DATA will be exposed as |self| for the
* datatype defined with FIXTURE_DATA() will be exposed as *self* for the
* implementation to clean up.
*
* A bare "return;" statement may be used to return early.
@ -163,15 +228,22 @@
struct __test_metadata __attribute__((unused)) *_metadata, \
FIXTURE_DATA(fixture_name) __attribute__((unused)) *self)
/* TEST_F(fixture, name) { implementation }
/**
* TEST_F(fixture_name, test_name) - Emits test registration and helpers for
* fixture-based test cases
*
* @fixture_name: fixture name
* @test_name: test name
*
* .. code-block:: c
*
* TEST_F(fixture, name) { implementation }
*
* Defines a test that depends on a fixture (e.g., is part of a test case).
* Very similar to TEST() except that |self| is the setup instance of fixture's
* Very similar to TEST() except that *self* is the setup instance of fixture's
* datatype exposed for use by the implementation.
*/
/* Emits test registration and helpers for fixture-based test
* cases.
* TODO(wad) register fixtures on dedicated test lists.
*/
/* TODO(wad) register fixtures on dedicated test lists. */
#define TEST_F(fixture_name, test_name) \
__TEST_F_IMPL(fixture_name, test_name, -1)
@ -210,10 +282,15 @@
struct __test_metadata __attribute__((unused)) *_metadata, \
FIXTURE_DATA(fixture_name) __attribute__((unused)) *self)
/* Use once to append a main() to the test file. E.g.,
* TEST_HARNESS_MAIN
/**
* TEST_HARNESS_MAIN - Simple wrapper to run the test harness
*
* .. code-block:: c
*
* TEST_HARNESS_MAIN
*
* Use once to append a main() to the test file.
*/
/* Exports a simple wrapper to run the test harness. */
#define TEST_HARNESS_MAIN \
static void __attribute__((constructor)) \
__constructor_order_last(void) \
@ -225,79 +302,247 @@
return test_harness_run(argc, argv); \
}
/*
* Operators for use in TEST and TEST_F.
/**
* DOC: operators
*
* Operators for use in TEST() and TEST_F().
* ASSERT_* calls will stop test execution immediately.
* EXPECT_* calls will emit a failure warning, note it, and continue.
*/
/* ASSERT_EQ(expected, measured): expected == measured */
/**
* ASSERT_EQ(expected, seen)
*
* @expected: expected value
* @seen: measured value
*
* ASSERT_EQ(expected, measured): expected == measured
*/
#define ASSERT_EQ(expected, seen) \
__EXPECT(expected, seen, ==, 1)
/* ASSERT_NE(expected, measured): expected != measured */
/**
* ASSERT_NE(expected, seen)
*
* @expected: expected value
* @seen: measured value
*
* ASSERT_NE(expected, measured): expected != measured
*/
#define ASSERT_NE(expected, seen) \
__EXPECT(expected, seen, !=, 1)
/* ASSERT_LT(expected, measured): expected < measured */
/**
* ASSERT_LT(expected, seen)
*
* @expected: expected value
* @seen: measured value
*
* ASSERT_LT(expected, measured): expected < measured
*/
#define ASSERT_LT(expected, seen) \
__EXPECT(expected, seen, <, 1)
/* ASSERT_LE(expected, measured): expected <= measured */
/**
* ASSERT_LE(expected, seen)
*
* @expected: expected value
* @seen: measured value
*
* ASSERT_LE(expected, measured): expected <= measured
*/
#define ASSERT_LE(expected, seen) \
__EXPECT(expected, seen, <=, 1)
/* ASSERT_GT(expected, measured): expected > measured */
/**
* ASSERT_GT(expected, seen)
*
* @expected: expected value
* @seen: measured value
*
* ASSERT_GT(expected, measured): expected > measured
*/
#define ASSERT_GT(expected, seen) \
__EXPECT(expected, seen, >, 1)
/* ASSERT_GE(expected, measured): expected >= measured */
/**
* ASSERT_GE(expected, seen)
*
* @expected: expected value
* @seen: measured value
*
* ASSERT_GE(expected, measured): expected >= measured
*/
#define ASSERT_GE(expected, seen) \
__EXPECT(expected, seen, >=, 1)
/* ASSERT_NULL(measured): NULL == measured */
/**
* ASSERT_NULL(seen)
*
* @seen: measured value
*
* ASSERT_NULL(measured): NULL == measured
*/
#define ASSERT_NULL(seen) \
__EXPECT(NULL, seen, ==, 1)
/* ASSERT_TRUE(measured): measured != 0 */
/**
* ASSERT_TRUE(seen)
*
* @seen: measured value
*
* ASSERT_TRUE(measured): measured != 0
*/
#define ASSERT_TRUE(seen) \
ASSERT_NE(0, seen)
/* ASSERT_FALSE(measured): measured == 0 */
/**
* ASSERT_FALSE(seen)
*
* @seen: measured value
*
* ASSERT_FALSE(measured): measured == 0
*/
#define ASSERT_FALSE(seen) \
ASSERT_EQ(0, seen)
/* ASSERT_STREQ(expected, measured): !strcmp(expected, measured) */
/**
* ASSERT_STREQ(expected, seen)
*
* @expected: expected value
* @seen: measured value
*
* ASSERT_STREQ(expected, measured): !strcmp(expected, measured)
*/
#define ASSERT_STREQ(expected, seen) \
__EXPECT_STR(expected, seen, ==, 1)
/* ASSERT_STRNE(expected, measured): strcmp(expected, measured) */
/**
* ASSERT_STRNE(expected, seen)
*
* @expected: expected value
* @seen: measured value
*
* ASSERT_STRNE(expected, measured): strcmp(expected, measured)
*/
#define ASSERT_STRNE(expected, seen) \
__EXPECT_STR(expected, seen, !=, 1)
/* EXPECT_EQ(expected, measured): expected == measured */
/**
* EXPECT_EQ(expected, seen)
*
* @expected: expected value
* @seen: measured value
*
* EXPECT_EQ(expected, measured): expected == measured
*/
#define EXPECT_EQ(expected, seen) \
__EXPECT(expected, seen, ==, 0)
/* EXPECT_NE(expected, measured): expected != measured */
/**
* EXPECT_NE(expected, seen)
*
* @expected: expected value
* @seen: measured value
*
* EXPECT_NE(expected, measured): expected != measured
*/
#define EXPECT_NE(expected, seen) \
__EXPECT(expected, seen, !=, 0)
/* EXPECT_LT(expected, measured): expected < measured */
/**
* EXPECT_LT(expected, seen)
*
* @expected: expected value
* @seen: measured value
*
* EXPECT_LT(expected, measured): expected < measured
*/
#define EXPECT_LT(expected, seen) \
__EXPECT(expected, seen, <, 0)
/* EXPECT_LE(expected, measured): expected <= measured */
/**
* EXPECT_LE(expected, seen)
*
* @expected: expected value
* @seen: measured value
*
* EXPECT_LE(expected, measured): expected <= measured
*/
#define EXPECT_LE(expected, seen) \
__EXPECT(expected, seen, <=, 0)
/* EXPECT_GT(expected, measured): expected > measured */
/**
* EXPECT_GT(expected, seen)
*
* @expected: expected value
* @seen: measured value
*
* EXPECT_GT(expected, measured): expected > measured
*/
#define EXPECT_GT(expected, seen) \
__EXPECT(expected, seen, >, 0)
/* EXPECT_GE(expected, measured): expected >= measured */
/**
* EXPECT_GE(expected, seen)
*
* @expected: expected value
* @seen: measured value
*
* EXPECT_GE(expected, measured): expected >= measured
*/
#define EXPECT_GE(expected, seen) \
__EXPECT(expected, seen, >=, 0)
/* EXPECT_NULL(measured): NULL == measured */
/**
* EXPECT_NULL(seen)
*
* @seen: measured value
*
* EXPECT_NULL(measured): NULL == measured
*/
#define EXPECT_NULL(seen) \
__EXPECT(NULL, seen, ==, 0)
/* EXPECT_TRUE(measured): 0 != measured */
/**
* EXPECT_TRUE(seen)
*
* @seen: measured value
*
* EXPECT_TRUE(measured): 0 != measured
*/
#define EXPECT_TRUE(seen) \
EXPECT_NE(0, seen)
/* EXPECT_FALSE(measured): 0 == measured */
/**
* EXPECT_FALSE(seen)
*
* @seen: measured value
*
* EXPECT_FALSE(measured): 0 == measured
*/
#define EXPECT_FALSE(seen) \
EXPECT_EQ(0, seen)
/* EXPECT_STREQ(expected, measured): !strcmp(expected, measured) */
/**
* EXPECT_STREQ(expected, seen)
*
* @expected: expected value
* @seen: measured value
*
* EXPECT_STREQ(expected, measured): !strcmp(expected, measured)
*/
#define EXPECT_STREQ(expected, seen) \
__EXPECT_STR(expected, seen, ==, 0)
/* EXPECT_STRNE(expected, measured): strcmp(expected, measured) */
/**
* EXPECT_STRNE(expected, seen)
*
* @expected: expected value
* @seen: measured value
*
* EXPECT_STRNE(expected, measured): strcmp(expected, measured)
*/
#define EXPECT_STRNE(expected, seen) \
__EXPECT_STR(expected, seen, !=, 0)