include/kunit/test.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Base unit test (KUnit) API.
   4  *
   5  * Copyright (C) 2019, Google LLC.
   6  * Author: Brendan Higgins <brendanhiggins@google.com>
   7  */
   8
   9 #ifndef _KUNIT_TEST_H
  10 #define _KUNIT_TEST_H
  11
  12 #include <kunit/assert.h>
  13 #include <kunit/try-catch.h>
  14
  15 #include <linux/args.h>
  16 #include <linux/compiler.h>
  17 #include <linux/container_of.h>
  18 #include <linux/err.h>
  19 #include <linux/init.h>
  20 #include <linux/jump_label.h>
  21 #include <linux/kconfig.h>
  22 #include <linux/kref.h>
  23 #include <linux/list.h>
  24 #include <linux/module.h>
  25 #include <linux/slab.h>
  26 #include <linux/spinlock.h>
  27 #include <linux/string.h>
  28 #include <linux/types.h>
  29
  30 #include <asm/rwonce.h>
  31
  32 /* Static key: true if any KUnit tests are currently running */
  33 DECLARE_STATIC_KEY_FALSE(kunit_running);
  34
  35 struct kunit;
  36 struct string_stream;
  37
  38 /* Maximum size of parameter description string. */
  39 #define KUNIT_PARAM_DESC_SIZE 128
  40
  41 /* Maximum size of a status comment. */
  42 #define KUNIT_STATUS_COMMENT_SIZE 256
  43
  44 /*
  45  * TAP specifies subtest stream indentation of 4 spaces, 8 spaces for a
  46  * sub-subtest.  See the "Subtests" section in
  47  * https://node-tap.org/tap-protocol/
  48  */
  49 #define KUNIT_INDENT_LEN                4
  50 #define KUNIT_SUBTEST_INDENT            "    "
  51 #define KUNIT_SUBSUBTEST_INDENT         "        "
  52
  53 /**
  54  * enum kunit_status - Type of result for a test or test suite
  55  * @KUNIT_SUCCESS: Denotes the test suite has not failed nor been skipped
  56  * @KUNIT_FAILURE: Denotes the test has failed.
  57  * @KUNIT_SKIPPED: Denotes the test has been skipped.
  58  */
  59 enum kunit_status {
  60         KUNIT_SUCCESS,
  61         KUNIT_FAILURE,
  62         KUNIT_SKIPPED,
  63 };
  64
  65 /* Attribute struct/enum definitions */
  66
  67 /*
  68  * Speed Attribute is stored as an enum and separated into categories of
  69  * speed: very_slowm, slow, and normal. These speeds are relative to
  70  * other KUnit tests.
  71  *
  72  * Note: unset speed attribute acts as default of KUNIT_SPEED_NORMAL.
  73  */
  74 enum kunit_speed {
  75         KUNIT_SPEED_UNSET,
  76         KUNIT_SPEED_VERY_SLOW,
  77         KUNIT_SPEED_SLOW,
  78         KUNIT_SPEED_NORMAL,
  79         KUNIT_SPEED_MAX = KUNIT_SPEED_NORMAL,
  80 };
  81
  82 /* Holds attributes for each test case and suite */
  83 struct kunit_attributes {
  84         enum kunit_speed speed;
  85 };
  86
  87 /**
  88  * struct kunit_case - represents an individual test case.
  89  *
  90  * @run_case: the function representing the actual test case.
  91  * @name:     the name of the test case.
  92  * @generate_params: the generator function for parameterized tests.
  93  * @attr:     the attributes associated with the test
  94  *
  95  * A test case is a function with the signature,
  96  * ``void (*)(struct kunit *)``
  97  * that makes expectations and assertions (see KUNIT_EXPECT_TRUE() and
  98  * KUNIT_ASSERT_TRUE()) about code under test. Each test case is associated
  99  * with a &struct kunit_suite and will be run after the suite's init
 100  * function and followed by the suite's exit function.
 101  *
 102  * A test case should be static and should only be created with the
 103  * KUNIT_CASE() macro; additionally, every array of test cases should be
 104  * terminated with an empty test case.
 105  *
 106  * Example:
 107  *
 108  * .. code-block:: c
 109  *
 110  *      void add_test_basic(struct kunit *test)
 111  *      {
 112  *              KUNIT_EXPECT_EQ(test, 1, add(1, 0));
 113  *              KUNIT_EXPECT_EQ(test, 2, add(1, 1));
 114  *              KUNIT_EXPECT_EQ(test, 0, add(-1, 1));
 115  *              KUNIT_EXPECT_EQ(test, INT_MAX, add(0, INT_MAX));
 116  *              KUNIT_EXPECT_EQ(test, -1, add(INT_MAX, INT_MIN));
 117  *      }
 118  *
 119  *      static struct kunit_case example_test_cases[] = {
 120  *              KUNIT_CASE(add_test_basic),
 121  *              {}
 122  *      };
 123  *
 124  */
 125 struct kunit_case {
 126         void (*run_case)(struct kunit *test);
 127         const char *name;
 128         const void* (*generate_params)(const void *prev, char *desc);
 129         struct kunit_attributes attr;
 130
 131         /* private: internal use only. */
 132         enum kunit_status status;
 133         char *module_name;
 134         struct string_stream *log;
 135 };
 136
 137 static inline char *kunit_status_to_ok_not_ok(enum kunit_status status)
 138 {
 139         switch (status) {
 140         case KUNIT_SKIPPED:
 141         case KUNIT_SUCCESS:
 142                 return "ok";
 143         case KUNIT_FAILURE:
 144                 return "not ok";
 145         }
 146         return "invalid";
 147 }
 148
 149 /**
 150  * KUNIT_CASE - A helper for creating a &struct kunit_case
 151  *
 152  * @test_name: a reference to a test case function.
 153  *
 154  * Takes a symbol for a function representing a test case and creates a
 155  * &struct kunit_case object from it. See the documentation for
 156  * &struct kunit_case for an example on how to use it.
 157  */
 158 #define KUNIT_CASE(test_name)                   \
 159                 { .run_case = test_name, .name = #test_name,    \
 160                   .module_name = KBUILD_MODNAME}
 161
 162 /**
 163  * KUNIT_CASE_ATTR - A helper for creating a &struct kunit_case
 164  * with attributes
 165  *
 166  * @test_name: a reference to a test case function.
 167  * @attributes: a reference to a struct kunit_attributes object containing
 168  * test attributes
 169  */
 170 #define KUNIT_CASE_ATTR(test_name, attributes)                  \
 171                 { .run_case = test_name, .name = #test_name,    \
 172                   .attr = attributes, .module_name = KBUILD_MODNAME}
 173
 174 /**
 175  * KUNIT_CASE_SLOW - A helper for creating a &struct kunit_case
 176  * with the slow attribute
 177  *
 178  * @test_name: a reference to a test case function.
 179  */
 180
 181 #define KUNIT_CASE_SLOW(test_name)                      \
 182                 { .run_case = test_name, .name = #test_name,    \
 183                   .attr.speed = KUNIT_SPEED_SLOW, .module_name = KBUILD_MODNAME}
 184
 185 /**
 186  * KUNIT_CASE_PARAM - A helper for creation a parameterized &struct kunit_case
 187  *
 188  * @test_name: a reference to a test case function.
 189  * @gen_params: a reference to a parameter generator function.
 190  *
 191  * The generator function::
 192  *
 193  *      const void* gen_params(const void *prev, char *desc)
 194  *
 195  * is used to lazily generate a series of arbitrarily typed values that fit into
 196  * a void*. The argument @prev is the previously returned value, which should be
 197  * used to derive the next value; @prev is set to NULL on the initial generator
 198  * call. When no more values are available, the generator must return NULL.
 199  * Optionally write a string into @desc (size of KUNIT_PARAM_DESC_SIZE)
 200  * describing the parameter.
 201  */
 202 #define KUNIT_CASE_PARAM(test_name, gen_params)                 \
 203                 { .run_case = test_name, .name = #test_name,    \
 204                   .generate_params = gen_params, .module_name = KBUILD_MODNAME}
 205
 206 /**
 207  * KUNIT_CASE_PARAM_ATTR - A helper for creating a parameterized &struct
 208  * kunit_case with attributes
 209  *
 210  * @test_name: a reference to a test case function.
 211  * @gen_params: a reference to a parameter generator function.
 212  * @attributes: a reference to a struct kunit_attributes object containing
 213  * test attributes
 214  */
 215 #define KUNIT_CASE_PARAM_ATTR(test_name, gen_params, attributes)        \
 216                 { .run_case = test_name, .name = #test_name,    \
 217                   .generate_params = gen_params,                                \
 218                   .attr = attributes, .module_name = KBUILD_MODNAME}
 219
 220 /**
 221  * struct kunit_suite - describes a related collection of &struct kunit_case
 222  *
 223  * @name:       the name of the test. Purely informational.
 224  * @suite_init: called once per test suite before the test cases.
 225  * @suite_exit: called once per test suite after all test cases.
 226  * @init:       called before every test case.
 227  * @exit:       called after every test case.
 228  * @test_cases: a null terminated array of test cases.
 229  * @attr:       the attributes associated with the test suite
 230  *
 231  * A kunit_suite is a collection of related &struct kunit_case s, such that
 232  * @init is called before every test case and @exit is called after every
 233  * test case, similar to the notion of a *test fixture* or a *test class*
 234  * in other unit testing frameworks like JUnit or Googletest.
 235  *
 236  * Note that @exit and @suite_exit will run even if @init or @suite_init
 237  * fail: make sure they can handle any inconsistent state which may result.
 238  *
 239  * Every &struct kunit_case must be associated with a kunit_suite for KUnit
 240  * to run it.
 241  */
 242 struct kunit_suite {
 243         const char name[256];
 244         int (*suite_init)(struct kunit_suite *suite);
 245         void (*suite_exit)(struct kunit_suite *suite);
 246         int (*init)(struct kunit *test);
 247         void (*exit)(struct kunit *test);
 248         struct kunit_case *test_cases;
 249         struct kunit_attributes attr;
 250
 251         /* private: internal use only */
 252         char status_comment[KUNIT_STATUS_COMMENT_SIZE];
 253         struct dentry *debugfs;
 254         struct string_stream *log;
 255         int suite_init_err;
 256 };
 257
 258 /* Stores an array of suites, end points one past the end */
 259 struct kunit_suite_set {
 260         struct kunit_suite * const *start;
 261         struct kunit_suite * const *end;
 262 };
 263
 264 /**
 265  * struct kunit - represents a running instance of a test.
 266  *
 267  * @priv: for user to store arbitrary data. Commonly used to pass data
 268  *        created in the init function (see &struct kunit_suite).
 269  *
 270  * Used to store information about the current context under which the test
 271  * is running. Most of this data is private and should only be accessed
 272  * indirectly via public functions; the one exception is @priv which can be
 273  * used by the test writer to store arbitrary data.
 274  */
 275 struct kunit {
 276         void *priv;
 277
 278         /* private: internal use only. */
 279         const char *name; /* Read only after initialization! */
 280         struct string_stream *log; /* Points at case log after initialization */
 281         struct kunit_try_catch try_catch;
 282         /* param_value is the current parameter value for a test case. */
 283         const void *param_value;
 284         /* param_index stores the index of the parameter in parameterized tests. */
 285         int param_index;
 286         /*
 287          * success starts as true, and may only be set to false during a
 288          * test case; thus, it is safe to update this across multiple
 289          * threads using WRITE_ONCE; however, as a consequence, it may only
 290          * be read after the test case finishes once all threads associated
 291          * with the test case have terminated.
 292          */
 293         spinlock_t lock; /* Guards all mutable test state. */
 294         enum kunit_status status; /* Read only after test_case finishes! */
 295         /*
 296          * Because resources is a list that may be updated multiple times (with
 297          * new resources) from any thread associated with a test case, we must
 298          * protect it with some type of lock.
 299          */
 300         struct list_head resources; /* Protected by lock. */
 301
 302         char status_comment[KUNIT_STATUS_COMMENT_SIZE];
 303 };
 304
 305 static inline void kunit_set_failure(struct kunit *test)
 306 {
 307         WRITE_ONCE(test->status, KUNIT_FAILURE);
 308 }
 309
 310 bool kunit_enabled(void);
 311 const char *kunit_action(void);
 312 const char *kunit_filter_glob(void);
 313 char *kunit_filter(void);
 314 char *kunit_filter_action(void);
 315
 316 void kunit_init_test(struct kunit *test, const char *name, struct string_stream *log);
 317
 318 int kunit_run_tests(struct kunit_suite *suite);
 319
 320 size_t kunit_suite_num_test_cases(struct kunit_suite *suite);
 321
 322 unsigned int kunit_test_case_num(struct kunit_suite *suite,
 323                                  struct kunit_case *test_case);
 324
 325 struct kunit_suite_set
 326 kunit_filter_suites(const struct kunit_suite_set *suite_set,
 327                     const char *filter_glob,
 328                     char *filters,
 329                     char *filter_action,
 330                     int *err);
 331 void kunit_free_suite_set(struct kunit_suite_set suite_set);
 332
 333 int __kunit_test_suites_init(struct kunit_suite * const * const suites, int num_suites);
 334
 335 void __kunit_test_suites_exit(struct kunit_suite **suites, int num_suites);
 336
 337 void kunit_exec_run_tests(struct kunit_suite_set *suite_set, bool builtin);
 338 void kunit_exec_list_tests(struct kunit_suite_set *suite_set, bool include_attr);
 339
 340 #if IS_BUILTIN(CONFIG_KUNIT)
 341 int kunit_run_all_tests(void);
 342 #else
 343 static inline int kunit_run_all_tests(void)
 344 {
 345         return 0;
 346 }
 347 #endif /* IS_BUILTIN(CONFIG_KUNIT) */
 348
 349 #define __kunit_test_suites(unique_array, ...)                                 \
 350         static struct kunit_suite *unique_array[]                              \
 351         __aligned(sizeof(struct kunit_suite *))                                \
 352         __used __section(".kunit_test_suites") = { __VA_ARGS__ }
 353
 354 /**
 355  * kunit_test_suites() - used to register one or more &struct kunit_suite
 356  *                       with KUnit.
 357  *
 358  * @__suites: a statically allocated list of &struct kunit_suite.
 359  *
 360  * Registers @suites with the test framework.
 361  * This is done by placing the array of struct kunit_suite * in the
 362  * .kunit_test_suites ELF section.
 363  *
 364  * When builtin, KUnit tests are all run via the executor at boot, and when
 365  * built as a module, they run on module load.
 366  *
 367  */
 368 #define kunit_test_suites(__suites...)                                          \
 369         __kunit_test_suites(__UNIQUE_ID(array),                         \
 370                             ##__suites)
 371
 372 #define kunit_test_suite(suite) kunit_test_suites(&suite)
 373
 374 /**
 375  * kunit_test_init_section_suites() - used to register one or more &struct
 376  *                                    kunit_suite containing init functions or
 377  *                                    init data.
 378  *
 379  * @__suites: a statically allocated list of &struct kunit_suite.
 380  *
 381  * This functions identically as kunit_test_suites() except that it suppresses
 382  * modpost warnings for referencing functions marked __init or data marked
 383  * __initdata; this is OK because currently KUnit only runs tests upon boot
 384  * during the init phase or upon loading a module during the init phase.
 385  *
 386  * NOTE TO KUNIT DEVS: If we ever allow KUnit tests to be run after boot, these
 387  * tests must be excluded.
 388  *
 389  * The only thing this macro does that's different from kunit_test_suites is
 390  * that it suffixes the array and suite declarations it makes with _probe;
 391  * modpost suppresses warnings about referencing init data for symbols named in
 392  * this manner.
 393  */
 394 #define kunit_test_init_section_suites(__suites...)                     \
 395         __kunit_test_suites(CONCATENATE(__UNIQUE_ID(array), _probe),    \
 396                             ##__suites)
 397
 398 #define kunit_test_init_section_suite(suite)    \
 399         kunit_test_init_section_suites(&suite)
 400
 401 #define kunit_suite_for_each_test_case(suite, test_case)                \
 402         for (test_case = suite->test_cases; test_case->run_case; test_case++)
 403
 404 enum kunit_status kunit_suite_has_succeeded(struct kunit_suite *suite);
 405
 406 /**
 407  * kunit_kmalloc_array() - Like kmalloc_array() except the allocation is *test managed*.
 408  * @test: The test context object.
 409  * @n: number of elements.
 410  * @size: The size in bytes of the desired memory.
 411  * @gfp: flags passed to underlying kmalloc().
 412  *
 413  * Just like `kmalloc_array(...)`, except the allocation is managed by the test case
 414  * and is automatically cleaned up after the test case concludes. See kunit_add_action()
 415  * for more information.
 416  *
 417  * Note that some internal context data is also allocated with GFP_KERNEL,
 418  * regardless of the gfp passed in.
 419  */
 420 void *kunit_kmalloc_array(struct kunit *test, size_t n, size_t size, gfp_t gfp);
 421
 422 /**
 423  * kunit_kmalloc() - Like kmalloc() except the allocation is *test managed*.
 424  * @test: The test context object.
 425  * @size: The size in bytes of the desired memory.
 426  * @gfp: flags passed to underlying kmalloc().
 427  *
 428  * See kmalloc() and kunit_kmalloc_array() for more information.
 429  *
 430  * Note that some internal context data is also allocated with GFP_KERNEL,
 431  * regardless of the gfp passed in.
 432  */
 433 static inline void *kunit_kmalloc(struct kunit *test, size_t size, gfp_t gfp)
 434 {
 435         return kunit_kmalloc_array(test, 1, size, gfp);
 436 }
 437
 438 /**
 439  * kunit_kfree() - Like kfree except for allocations managed by KUnit.
 440  * @test: The test case to which the resource belongs.
 441  * @ptr: The memory allocation to free.
 442  */
 443 void kunit_kfree(struct kunit *test, const void *ptr);
 444
 445 /**
 446  * kunit_kzalloc() - Just like kunit_kmalloc(), but zeroes the allocation.
 447  * @test: The test context object.
 448  * @size: The size in bytes of the desired memory.
 449  * @gfp: flags passed to underlying kmalloc().
 450  *
 451  * See kzalloc() and kunit_kmalloc_array() for more information.
 452  */
 453 static inline void *kunit_kzalloc(struct kunit *test, size_t size, gfp_t gfp)
 454 {
 455         return kunit_kmalloc(test, size, gfp | __GFP_ZERO);
 456 }
 457
 458 /**
 459  * kunit_kcalloc() - Just like kunit_kmalloc_array(), but zeroes the allocation.
 460  * @test: The test context object.
 461  * @n: number of elements.
 462  * @size: The size in bytes of the desired memory.
 463  * @gfp: flags passed to underlying kmalloc().
 464  *
 465  * See kcalloc() and kunit_kmalloc_array() for more information.
 466  */
 467 static inline void *kunit_kcalloc(struct kunit *test, size_t n, size_t size, gfp_t gfp)
 468 {
 469         return kunit_kmalloc_array(test, n, size, gfp | __GFP_ZERO);
 470 }
 471
 472 void kunit_cleanup(struct kunit *test);
 473
 474 void __printf(2, 3) kunit_log_append(struct string_stream *log, const char *fmt, ...);
 475
 476 /**
 477  * kunit_mark_skipped() - Marks @test_or_suite as skipped
 478  *
 479  * @test_or_suite: The test context object.
 480  * @fmt:  A printk() style format string.
 481  *
 482  * Marks the test as skipped. @fmt is given output as the test status
 483  * comment, typically the reason the test was skipped.
 484  *
 485  * Test execution continues after kunit_mark_skipped() is called.
 486  */
 487 #define kunit_mark_skipped(test_or_suite, fmt, ...)                     \
 488         do {                                                            \
 489                 WRITE_ONCE((test_or_suite)->status, KUNIT_SKIPPED);     \
 490                 scnprintf((test_or_suite)->status_comment,              \
 491                           KUNIT_STATUS_COMMENT_SIZE,                    \
 492                           fmt, ##__VA_ARGS__);                          \
 493         } while (0)
 494
 495 /**
 496  * kunit_skip() - Marks @test_or_suite as skipped
 497  *
 498  * @test_or_suite: The test context object.
 499  * @fmt:  A printk() style format string.
 500  *
 501  * Skips the test. @fmt is given output as the test status
 502  * comment, typically the reason the test was skipped.
 503  *
 504  * Test execution is halted after kunit_skip() is called.
 505  */
 506 #define kunit_skip(test_or_suite, fmt, ...)                             \
 507         do {                                                            \
 508                 kunit_mark_skipped((test_or_suite), fmt, ##__VA_ARGS__);\
 509                 kunit_try_catch_throw(&((test_or_suite)->try_catch));   \
 510         } while (0)
 511
 512 /*
 513  * printk and log to per-test or per-suite log buffer.  Logging only done
 514  * if CONFIG_KUNIT_DEBUGFS is 'y'; if it is 'n', no log is allocated/used.
 515  */
 516 #define kunit_log(lvl, test_or_suite, fmt, ...)                         \
 517         do {                                                            \
 518                 printk(lvl fmt, ##__VA_ARGS__);                         \
 519                 kunit_log_append((test_or_suite)->log,  fmt,            \
 520                                  ##__VA_ARGS__);                        \
 521         } while (0)
 522
 523 #define kunit_printk(lvl, test, fmt, ...)                               \
 524         kunit_log(lvl, test, KUNIT_SUBTEST_INDENT "# %s: " fmt,         \
 525                   (test)->name, ##__VA_ARGS__)
 526
 527 /**
 528  * kunit_info() - Prints an INFO level message associated with @test.
 529  *
 530  * @test: The test context object.
 531  * @fmt:  A printk() style format string.
 532  *
 533  * Prints an info level message associated with the test suite being run.
 534  * Takes a variable number of format parameters just like printk().
 535  */
 536 #define kunit_info(test, fmt, ...) \
 537         kunit_printk(KERN_INFO, test, fmt, ##__VA_ARGS__)
 538
 539 /**
 540  * kunit_warn() - Prints a WARN level message associated with @test.
 541  *
 542  * @test: The test context object.
 543  * @fmt:  A printk() style format string.
 544  *
 545  * Prints a warning level message.
 546  */
 547 #define kunit_warn(test, fmt, ...) \
 548         kunit_printk(KERN_WARNING, test, fmt, ##__VA_ARGS__)
 549
 550 /**
 551  * kunit_err() - Prints an ERROR level message associated with @test.
 552  *
 553  * @test: The test context object.
 554  * @fmt:  A printk() style format string.
 555  *
 556  * Prints an error level message.
 557  */
 558 #define kunit_err(test, fmt, ...) \
 559         kunit_printk(KERN_ERR, test, fmt, ##__VA_ARGS__)
 560
 561 /**
 562  * KUNIT_SUCCEED() - A no-op expectation. Only exists for code clarity.
 563  * @test: The test context object.
 564  *
 565  * The opposite of KUNIT_FAIL(), it is an expectation that cannot fail. In other
 566  * words, it does nothing and only exists for code clarity. See
 567  * KUNIT_EXPECT_TRUE() for more information.
 568  */
 569 #define KUNIT_SUCCEED(test) do {} while (0)
 570
 571 void __noreturn __kunit_abort(struct kunit *test);
 572
 573 void __kunit_do_failed_assertion(struct kunit *test,
 574                                const struct kunit_loc *loc,
 575                                enum kunit_assert_type type,
 576                                const struct kunit_assert *assert,
 577                                assert_format_t assert_format,
 578                                const char *fmt, ...);
 579
 580 #define _KUNIT_FAILED(test, assert_type, assert_class, assert_format, INITIALIZER, fmt, ...) do { \
 581         static const struct kunit_loc __loc = KUNIT_CURRENT_LOC;               \
 582         const struct assert_class __assertion = INITIALIZER;                   \
 583         __kunit_do_failed_assertion(test,                                      \
 584                                     &__loc,                                    \
 585                                     assert_type,                               \
 586                                     &__assertion.assert,                       \
 587                                     assert_format,                             \
 588                                     fmt,                                       \
 589                                     ##__VA_ARGS__);                            \
 590         if (assert_type == KUNIT_ASSERTION)                                    \
 591                 __kunit_abort(test);                                           \
 592 } while (0)
 593
 594
 595 #define KUNIT_FAIL_ASSERTION(test, assert_type, fmt, ...)                      \
 596         _KUNIT_FAILED(test,                                                    \
 597                       assert_type,                                             \
 598                       kunit_fail_assert,                                       \
 599                       kunit_fail_assert_format,                                \
 600                       {},                                                      \
 601                       fmt,                                                     \
 602                       ##__VA_ARGS__)
 603
 604 /**
 605  * KUNIT_FAIL() - Always causes a test to fail when evaluated.
 606  * @test: The test context object.
 607  * @fmt: an informational message to be printed when the assertion is made.
 608  * @...: string format arguments.
 609  *
 610  * The opposite of KUNIT_SUCCEED(), it is an expectation that always fails. In
 611  * other words, it always results in a failed expectation, and consequently
 612  * always causes the test case to fail when evaluated. See KUNIT_EXPECT_TRUE()
 613  * for more information.
 614  */
 615 #define KUNIT_FAIL(test, fmt, ...)                                             \
 616         KUNIT_FAIL_ASSERTION(test,                                             \
 617                              KUNIT_EXPECTATION,                                \
 618                              fmt,                                              \
 619                              ##__VA_ARGS__)
 620
 621 /* Helper to safely pass around an initializer list to other macros. */
 622 #define KUNIT_INIT_ASSERT(initializers...) { initializers }
 623
 624 #define KUNIT_UNARY_ASSERTION(test,                                            \
 625                               assert_type,                                     \
 626                               condition_,                                      \
 627                               expected_true_,                                  \
 628                               fmt,                                             \
 629                               ...)                                             \
 630 do {                                                                           \
 631         if (likely(!!(condition_) == !!expected_true_))                        \
 632                 break;                                                         \
 633                                                                                \
 634         _KUNIT_FAILED(test,                                                    \
 635                       assert_type,                                             \
 636                       kunit_unary_assert,                                      \
 637                       kunit_unary_assert_format,                               \
 638                       KUNIT_INIT_ASSERT(.condition = #condition_,              \
 639                                         .expected_true = expected_true_),      \
 640                       fmt,                                                     \
 641                       ##__VA_ARGS__);                                          \
 642 } while (0)
 643
 644 #define KUNIT_TRUE_MSG_ASSERTION(test, assert_type, condition, fmt, ...)       \
 645         KUNIT_UNARY_ASSERTION(test,                                            \
 646                               assert_type,                                     \
 647                               condition,                                       \
 648                               true,                                            \
 649                               fmt,                                             \
 650                               ##__VA_ARGS__)
 651
 652 #define KUNIT_FALSE_MSG_ASSERTION(test, assert_type, condition, fmt, ...)      \
 653         KUNIT_UNARY_ASSERTION(test,                                            \
 654                               assert_type,                                     \
 655                               condition,                                       \
 656                               false,                                           \
 657                               fmt,                                             \
 658                               ##__VA_ARGS__)
 659
 660 /*
 661  * A factory macro for defining the assertions and expectations for the basic
 662  * comparisons defined for the built in types.
 663  *
 664  * Unfortunately, there is no common type that all types can be promoted to for
 665  * which all the binary operators behave the same way as for the actual types
 666  * (for example, there is no type that long long and unsigned long long can
 667  * both be cast to where the comparison result is preserved for all values). So
 668  * the best we can do is do the comparison in the original types and then coerce
 669  * everything to long long for printing; this way, the comparison behaves
 670  * correctly and the printed out value usually makes sense without
 671  * interpretation, but can always be interpreted to figure out the actual
 672  * value.
 673  */
 674 #define KUNIT_BASE_BINARY_ASSERTION(test,                                      \
 675                                     assert_class,                              \
 676                                     format_func,                               \
 677                                     assert_type,                               \
 678                                     left,                                      \
 679                                     op,                                        \
 680                                     right,                                     \
 681                                     fmt,                                       \
 682                                     ...)                                       \
 683 do {                                                                           \
 684         const typeof(left) __left = (left);                                    \
 685         const typeof(right) __right = (right);                                 \
 686         static const struct kunit_binary_assert_text __text = {                \
 687                 .operation = #op,                                              \
 688                 .left_text = #left,                                            \
 689                 .right_text = #right,                                          \
 690         };                                                                     \
 691                                                                                \
 692         if (likely(__left op __right))                                         \
 693                 break;                                                         \
 694                                                                                \
 695         _KUNIT_FAILED(test,                                                    \
 696                       assert_type,                                             \
 697                       assert_class,                                            \
 698                       format_func,                                             \
 699                       KUNIT_INIT_ASSERT(.text = &__text,                       \
 700                                         .left_value = __left,                  \
 701                                         .right_value = __right),               \
 702                       fmt,                                                     \
 703                       ##__VA_ARGS__);                                          \
 704 } while (0)
 705
 706 #define KUNIT_BINARY_INT_ASSERTION(test,                                       \
 707                                    assert_type,                                \
 708                                    left,                                       \
 709                                    op,                                         \
 710                                    right,                                      \
 711                                    fmt,                                        \
 712                                     ...)                                       \
 713         KUNIT_BASE_BINARY_ASSERTION(test,                                      \
 714                                     kunit_binary_assert,                       \
 715                                     kunit_binary_assert_format,                \
 716                                     assert_type,                               \
 717                                     left, op, right,                           \
 718                                     fmt,                                       \
 719                                     ##__VA_ARGS__)
 720
 721 #define KUNIT_BINARY_PTR_ASSERTION(test,                                       \
 722                                    assert_type,                                \
 723                                    left,                                       \
 724                                    op,                                         \
 725                                    right,                                      \
 726                                    fmt,                                        \
 727                                     ...)                                       \
 728         KUNIT_BASE_BINARY_ASSERTION(test,                                      \
 729                                     kunit_binary_ptr_assert,                   \
 730                                     kunit_binary_ptr_assert_format,            \
 731                                     assert_type,                               \
 732                                     left, op, right,                           \
 733                                     fmt,                                       \
 734                                     ##__VA_ARGS__)
 735
 736 #define KUNIT_BINARY_STR_ASSERTION(test,                                       \
 737                                    assert_type,                                \
 738                                    left,                                       \
 739                                    op,                                         \
 740                                    right,                                      \
 741                                    fmt,                                        \
 742                                    ...)                                        \
 743 do {                                                                           \
 744         const char *__left = (left);                                           \
 745         const char *__right = (right);                                         \
 746         static const struct kunit_binary_assert_text __text = {                \
 747                 .operation = #op,                                              \
 748                 .left_text = #left,                                            \
 749                 .right_text = #right,                                          \
 750         };                                                                     \
 751                                                                                \
 752         if (likely(strcmp(__left, __right) op 0))                              \
 753                 break;                                                         \
 754                                                                                \
 755                                                                                \
 756         _KUNIT_FAILED(test,                                                    \
 757                       assert_type,                                             \
 758                       kunit_binary_str_assert,                                 \
 759                       kunit_binary_str_assert_format,                          \
 760                       KUNIT_INIT_ASSERT(.text = &__text,                       \
 761                                         .left_value = __left,                  \
 762                                         .right_value = __right),               \
 763                       fmt,                                                     \
 764                       ##__VA_ARGS__);                                          \
 765 } while (0)
 766
 767 #define KUNIT_MEM_ASSERTION(test,                                              \
 768                             assert_type,                                       \
 769                             left,                                              \
 770                             op,                                                \
 771                             right,                                             \
 772                             size_,                                             \
 773                             fmt,                                               \
 774                             ...)                                               \
 775 do {                                                                           \
 776         const void *__left = (left);                                           \
 777         const void *__right = (right);                                         \
 778         const size_t __size = (size_);                                         \
 779         static const struct kunit_binary_assert_text __text = {                \
 780                 .operation = #op,                                              \
 781                 .left_text = #left,                                            \
 782                 .right_text = #right,                                          \
 783         };                                                                     \
 784                                                                                \
 785         if (likely(__left && __right))                                         \
 786                 if (likely(memcmp(__left, __right, __size) op 0))              \
 787                         break;                                                 \
 788                                                                                \
 789         _KUNIT_FAILED(test,                                                    \
 790                       assert_type,                                             \
 791                       kunit_mem_assert,                                        \
 792                       kunit_mem_assert_format,                                 \
 793                       KUNIT_INIT_ASSERT(.text = &__text,                       \
 794                                         .left_value = __left,                  \
 795                                         .right_value = __right,                \
 796                                         .size = __size),                       \
 797                       fmt,                                                     \
 798                       ##__VA_ARGS__);                                          \
 799 } while (0)
 800
 801 #define KUNIT_PTR_NOT_ERR_OR_NULL_MSG_ASSERTION(test,                          \
 802                                                 assert_type,                   \
 803                                                 ptr,                           \
 804                                                 fmt,                           \
 805                                                 ...)                           \
 806 do {                                                                           \
 807         const typeof(ptr) __ptr = (ptr);                                       \
 808                                                                                \
 809         if (!IS_ERR_OR_NULL(__ptr))                                            \
 810                 break;                                                         \
 811                                                                                \
 812         _KUNIT_FAILED(test,                                                    \
 813                       assert_type,                                             \
 814                       kunit_ptr_not_err_assert,                                \
 815                       kunit_ptr_not_err_assert_format,                         \
 816                       KUNIT_INIT_ASSERT(.text = #ptr, .value = __ptr),         \
 817                       fmt,                                                     \
 818                       ##__VA_ARGS__);                                          \
 819 } while (0)
 820
 821 /**
 822  * KUNIT_EXPECT_TRUE() - Causes a test failure when the expression is not true.
 823  * @test: The test context object.
 824  * @condition: an arbitrary boolean expression. The test fails when this does
 825  * not evaluate to true.
 826  *
 827  * This and expectations of the form `KUNIT_EXPECT_*` will cause the test case
 828  * to fail when the specified condition is not met; however, it will not prevent
 829  * the test case from continuing to run; this is otherwise known as an
 830  * *expectation failure*.
 831  */
 832 #define KUNIT_EXPECT_TRUE(test, condition) \
 833         KUNIT_EXPECT_TRUE_MSG(test, condition, NULL)
 834
 835 #define KUNIT_EXPECT_TRUE_MSG(test, condition, fmt, ...)                       \
 836         KUNIT_TRUE_MSG_ASSERTION(test,                                         \
 837                                  KUNIT_EXPECTATION,                            \
 838                                  condition,                                    \
 839                                  fmt,                                          \
 840                                  ##__VA_ARGS__)
 841
 842 /**
 843  * KUNIT_EXPECT_FALSE() - Makes a test failure when the expression is not false.
 844  * @test: The test context object.
 845  * @condition: an arbitrary boolean expression. The test fails when this does
 846  * not evaluate to false.
 847  *
 848  * Sets an expectation that @condition evaluates to false. See
 849  * KUNIT_EXPECT_TRUE() for more information.
 850  */
 851 #define KUNIT_EXPECT_FALSE(test, condition) \
 852         KUNIT_EXPECT_FALSE_MSG(test, condition, NULL)
 853
 854 #define KUNIT_EXPECT_FALSE_MSG(test, condition, fmt, ...)                      \
 855         KUNIT_FALSE_MSG_ASSERTION(test,                                        \
 856                                   KUNIT_EXPECTATION,                           \
 857                                   condition,                                   \
 858                                   fmt,                                         \
 859                                   ##__VA_ARGS__)
 860
 861 /**
 862  * KUNIT_EXPECT_EQ() - Sets an expectation that @left and @right are equal.
 863  * @test: The test context object.
 864  * @left: an arbitrary expression that evaluates to a primitive C type.
 865  * @right: an arbitrary expression that evaluates to a primitive C type.
 866  *
 867  * Sets an expectation that the values that @left and @right evaluate to are
 868  * equal. This is semantically equivalent to
 869  * KUNIT_EXPECT_TRUE(@test, (@left) == (@right)). See KUNIT_EXPECT_TRUE() for
 870  * more information.
 871  */
 872 #define KUNIT_EXPECT_EQ(test, left, right) \
 873         KUNIT_EXPECT_EQ_MSG(test, left, right, NULL)
 874
 875 #define KUNIT_EXPECT_EQ_MSG(test, left, right, fmt, ...)                       \
 876         KUNIT_BINARY_INT_ASSERTION(test,                                       \
 877                                    KUNIT_EXPECTATION,                          \
 878                                    left, ==, right,                            \
 879                                    fmt,                                        \
 880                                     ##__VA_ARGS__)
 881
 882 /**
 883  * KUNIT_EXPECT_PTR_EQ() - Expects that pointers @left and @right are equal.
 884  * @test: The test context object.
 885  * @left: an arbitrary expression that evaluates to a pointer.
 886  * @right: an arbitrary expression that evaluates to a pointer.
 887  *
 888  * Sets an expectation that the values that @left and @right evaluate to are
 889  * equal. This is semantically equivalent to
 890  * KUNIT_EXPECT_TRUE(@test, (@left) == (@right)). See KUNIT_EXPECT_TRUE() for
 891  * more information.
 892  */
 893 #define KUNIT_EXPECT_PTR_EQ(test, left, right)                                 \
 894         KUNIT_EXPECT_PTR_EQ_MSG(test, left, right, NULL)
 895
 896 #define KUNIT_EXPECT_PTR_EQ_MSG(test, left, right, fmt, ...)                   \
 897         KUNIT_BINARY_PTR_ASSERTION(test,                                       \
 898                                    KUNIT_EXPECTATION,                          \
 899                                    left, ==, right,                            \
 900                                    fmt,                                        \
 901                                    ##__VA_ARGS__)
 902
 903 /**
 904  * KUNIT_EXPECT_NE() - An expectation that @left and @right are not equal.
 905  * @test: The test context object.
 906  * @left: an arbitrary expression that evaluates to a primitive C type.
 907  * @right: an arbitrary expression that evaluates to a primitive C type.
 908  *
 909  * Sets an expectation that the values that @left and @right evaluate to are not
 910  * equal. This is semantically equivalent to
 911  * KUNIT_EXPECT_TRUE(@test, (@left) != (@right)). See KUNIT_EXPECT_TRUE() for
 912  * more information.
 913  */
 914 #define KUNIT_EXPECT_NE(test, left, right) \
 915         KUNIT_EXPECT_NE_MSG(test, left, right, NULL)
 916
 917 #define KUNIT_EXPECT_NE_MSG(test, left, right, fmt, ...)                       \
 918         KUNIT_BINARY_INT_ASSERTION(test,                                       \
 919                                    KUNIT_EXPECTATION,                          \
 920                                    left, !=, right,                            \
 921                                    fmt,                                        \
 922                                     ##__VA_ARGS__)
 923
 924 /**
 925  * KUNIT_EXPECT_PTR_NE() - Expects that pointers @left and @right are not equal.
 926  * @test: The test context object.
 927  * @left: an arbitrary expression that evaluates to a pointer.
 928  * @right: an arbitrary expression that evaluates to a pointer.
 929  *
 930  * Sets an expectation that the values that @left and @right evaluate to are not
 931  * equal. This is semantically equivalent to
 932  * KUNIT_EXPECT_TRUE(@test, (@left) != (@right)). See KUNIT_EXPECT_TRUE() for
 933  * more information.
 934  */
 935 #define KUNIT_EXPECT_PTR_NE(test, left, right)                                 \
 936         KUNIT_EXPECT_PTR_NE_MSG(test, left, right, NULL)
 937
 938 #define KUNIT_EXPECT_PTR_NE_MSG(test, left, right, fmt, ...)                   \
 939         KUNIT_BINARY_PTR_ASSERTION(test,                                       \
 940                                    KUNIT_EXPECTATION,                          \
 941                                    left, !=, right,                            \
 942                                    fmt,                                        \
 943                                    ##__VA_ARGS__)
 944
 945 /**
 946  * KUNIT_EXPECT_LT() - An expectation that @left is less than @right.
 947  * @test: The test context object.
 948  * @left: an arbitrary expression that evaluates to a primitive C type.
 949  * @right: an arbitrary expression that evaluates to a primitive C type.
 950  *
 951  * Sets an expectation that the value that @left evaluates to is less than the
 952  * value that @right evaluates to. This is semantically equivalent to
 953  * KUNIT_EXPECT_TRUE(@test, (@left) < (@right)). See KUNIT_EXPECT_TRUE() for
 954  * more information.
 955  */
 956 #define KUNIT_EXPECT_LT(test, left, right) \
 957         KUNIT_EXPECT_LT_MSG(test, left, right, NULL)
 958
 959 #define KUNIT_EXPECT_LT_MSG(test, left, right, fmt, ...)                       \
 960         KUNIT_BINARY_INT_ASSERTION(test,                                       \
 961                                    KUNIT_EXPECTATION,                          \
 962                                    left, <, right,                             \
 963                                    fmt,                                        \
 964                                     ##__VA_ARGS__)
 965
 966 /**
 967  * KUNIT_EXPECT_LE() - Expects that @left is less than or equal to @right.
 968  * @test: The test context object.
 969  * @left: an arbitrary expression that evaluates to a primitive C type.
 970  * @right: an arbitrary expression that evaluates to a primitive C type.
 971  *
 972  * Sets an expectation that the value that @left evaluates to is less than or
 973  * equal to the value that @right evaluates to. Semantically this is equivalent
 974  * to KUNIT_EXPECT_TRUE(@test, (@left) <= (@right)). See KUNIT_EXPECT_TRUE() for
 975  * more information.
 976  */
 977 #define KUNIT_EXPECT_LE(test, left, right) \
 978         KUNIT_EXPECT_LE_MSG(test, left, right, NULL)
 979
 980 #define KUNIT_EXPECT_LE_MSG(test, left, right, fmt, ...)                       \
 981         KUNIT_BINARY_INT_ASSERTION(test,                                       \
 982                                    KUNIT_EXPECTATION,                          \
 983                                    left, <=, right,                            \
 984                                    fmt,                                        \
 985                                     ##__VA_ARGS__)
 986
 987 /**
 988  * KUNIT_EXPECT_GT() - An expectation that @left is greater than @right.
 989  * @test: The test context object.
 990  * @left: an arbitrary expression that evaluates to a primitive C type.
 991  * @right: an arbitrary expression that evaluates to a primitive C type.
 992  *
 993  * Sets an expectation that the value that @left evaluates to is greater than
 994  * the value that @right evaluates to. This is semantically equivalent to
 995  * KUNIT_EXPECT_TRUE(@test, (@left) > (@right)). See KUNIT_EXPECT_TRUE() for
 996  * more information.
 997  */
 998 #define KUNIT_EXPECT_GT(test, left, right) \
 999         KUNIT_EXPECT_GT_MSG(test, left, right, NULL)
1000
1001 #define KUNIT_EXPECT_GT_MSG(test, left, right, fmt, ...)                       \
1002         KUNIT_BINARY_INT_ASSERTION(test,                                       \
1003                                    KUNIT_EXPECTATION,                          \
1004                                    left, >, right,                             \
1005                                    fmt,                                        \
1006                                     ##__VA_ARGS__)
1007
1008 /**
1009  * KUNIT_EXPECT_GE() - Expects that @left is greater than or equal to @right.
1010  * @test: The test context object.
1011  * @left: an arbitrary expression that evaluates to a primitive C type.
1012  * @right: an arbitrary expression that evaluates to a primitive C type.
1013  *
1014  * Sets an expectation that the value that @left evaluates to is greater than
1015  * the value that @right evaluates to. This is semantically equivalent to
1016  * KUNIT_EXPECT_TRUE(@test, (@left) >= (@right)). See KUNIT_EXPECT_TRUE() for
1017  * more information.
1018  */
1019 #define KUNIT_EXPECT_GE(test, left, right) \
1020         KUNIT_EXPECT_GE_MSG(test, left, right, NULL)
1021
1022 #define KUNIT_EXPECT_GE_MSG(test, left, right, fmt, ...)                       \
1023         KUNIT_BINARY_INT_ASSERTION(test,                                       \
1024                                    KUNIT_EXPECTATION,                          \
1025                                    left, >=, right,                            \
1026                                    fmt,                                        \
1027                                     ##__VA_ARGS__)
1028
1029 /**
1030  * KUNIT_EXPECT_STREQ() - Expects that strings @left and @right are equal.
1031  * @test: The test context object.
1032  * @left: an arbitrary expression that evaluates to a null terminated string.
1033  * @right: an arbitrary expression that evaluates to a null terminated string.
1034  *
1035  * Sets an expectation that the values that @left and @right evaluate to are
1036  * equal. This is semantically equivalent to
1037  * KUNIT_EXPECT_TRUE(@test, !strcmp((@left), (@right))). See KUNIT_EXPECT_TRUE()
1038  * for more information.
1039  */
1040 #define KUNIT_EXPECT_STREQ(test, left, right) \
1041         KUNIT_EXPECT_STREQ_MSG(test, left, right, NULL)
1042
1043 #define KUNIT_EXPECT_STREQ_MSG(test, left, right, fmt, ...)                    \
1044         KUNIT_BINARY_STR_ASSERTION(test,                                       \
1045                                    KUNIT_EXPECTATION,                          \
1046                                    left, ==, right,                            \
1047                                    fmt,                                        \
1048                                    ##__VA_ARGS__)
1049
1050 /**
1051  * KUNIT_EXPECT_STRNEQ() - Expects that strings @left and @right are not equal.
1052  * @test: The test context object.
1053  * @left: an arbitrary expression that evaluates to a null terminated string.
1054  * @right: an arbitrary expression that evaluates to a null terminated string.
1055  *
1056  * Sets an expectation that the values that @left and @right evaluate to are
1057  * not equal. This is semantically equivalent to
1058  * KUNIT_EXPECT_TRUE(@test, strcmp((@left), (@right))). See KUNIT_EXPECT_TRUE()
1059  * for more information.
1060  */
1061 #define KUNIT_EXPECT_STRNEQ(test, left, right) \
1062         KUNIT_EXPECT_STRNEQ_MSG(test, left, right, NULL)
1063
1064 #define KUNIT_EXPECT_STRNEQ_MSG(test, left, right, fmt, ...)                   \
1065         KUNIT_BINARY_STR_ASSERTION(test,                                       \
1066                                    KUNIT_EXPECTATION,                          \
1067                                    left, !=, right,                            \
1068                                    fmt,                                        \
1069                                    ##__VA_ARGS__)
1070
1071 /**
1072  * KUNIT_EXPECT_MEMEQ() - Expects that the first @size bytes of @left and @right are equal.
1073  * @test: The test context object.
1074  * @left: An arbitrary expression that evaluates to the specified size.
1075  * @right: An arbitrary expression that evaluates to the specified size.
1076  * @size: Number of bytes compared.
1077  *
1078  * Sets an expectation that the values that @left and @right evaluate to are
1079  * equal. This is semantically equivalent to
1080  * KUNIT_EXPECT_TRUE(@test, !memcmp((@left), (@right), (@size))). See
1081  * KUNIT_EXPECT_TRUE() for more information.
1082  *
1083  * Although this expectation works for any memory block, it is not recommended
1084  * for comparing more structured data, such as structs. This expectation is
1085  * recommended for comparing, for example, data arrays.
1086  */
1087 #define KUNIT_EXPECT_MEMEQ(test, left, right, size) \
1088         KUNIT_EXPECT_MEMEQ_MSG(test, left, right, size, NULL)
1089
1090 #define KUNIT_EXPECT_MEMEQ_MSG(test, left, right, size, fmt, ...)              \
1091         KUNIT_MEM_ASSERTION(test,                                              \
1092                             KUNIT_EXPECTATION,                                 \
1093                             left, ==, right,                                   \
1094                             size,                                              \
1095                             fmt,                                               \
1096                             ##__VA_ARGS__)
1097
1098 /**
1099  * KUNIT_EXPECT_MEMNEQ() - Expects that the first @size bytes of @left and @right are not equal.
1100  * @test: The test context object.
1101  * @left: An arbitrary expression that evaluates to the specified size.
1102  * @right: An arbitrary expression that evaluates to the specified size.
1103  * @size: Number of bytes compared.
1104  *
1105  * Sets an expectation that the values that @left and @right evaluate to are
1106  * not equal. This is semantically equivalent to
1107  * KUNIT_EXPECT_TRUE(@test, memcmp((@left), (@right), (@size))). See
1108  * KUNIT_EXPECT_TRUE() for more information.
1109  *
1110  * Although this expectation works for any memory block, it is not recommended
1111  * for comparing more structured data, such as structs. This expectation is
1112  * recommended for comparing, for example, data arrays.
1113  */
1114 #define KUNIT_EXPECT_MEMNEQ(test, left, right, size) \
1115         KUNIT_EXPECT_MEMNEQ_MSG(test, left, right, size, NULL)
1116
1117 #define KUNIT_EXPECT_MEMNEQ_MSG(test, left, right, size, fmt, ...)             \
1118         KUNIT_MEM_ASSERTION(test,                                              \
1119                             KUNIT_EXPECTATION,                                 \
1120                             left, !=, right,                                   \
1121                             size,                                              \
1122                             fmt,                                               \
1123                             ##__VA_ARGS__)
1124
1125 /**
1126  * KUNIT_EXPECT_NULL() - Expects that @ptr is null.
1127  * @test: The test context object.
1128  * @ptr: an arbitrary pointer.
1129  *
1130  * Sets an expectation that the value that @ptr evaluates to is null. This is
1131  * semantically equivalent to KUNIT_EXPECT_PTR_EQ(@test, ptr, NULL).
1132  * See KUNIT_EXPECT_TRUE() for more information.
1133  */
1134 #define KUNIT_EXPECT_NULL(test, ptr)                                           \
1135         KUNIT_EXPECT_NULL_MSG(test,                                            \
1136                               ptr,                                             \
1137                               NULL)
1138
1139 #define KUNIT_EXPECT_NULL_MSG(test, ptr, fmt, ...)                             \
1140         KUNIT_BINARY_PTR_ASSERTION(test,                                       \
1141                                    KUNIT_EXPECTATION,                          \
1142                                    ptr, ==, NULL,                              \
1143                                    fmt,                                        \
1144                                    ##__VA_ARGS__)
1145
1146 /**
1147  * KUNIT_EXPECT_NOT_NULL() - Expects that @ptr is not null.
1148  * @test: The test context object.
1149  * @ptr: an arbitrary pointer.
1150  *
1151  * Sets an expectation that the value that @ptr evaluates to is not null. This
1152  * is semantically equivalent to KUNIT_EXPECT_PTR_NE(@test, ptr, NULL).
1153  * See KUNIT_EXPECT_TRUE() for more information.
1154  */
1155 #define KUNIT_EXPECT_NOT_NULL(test, ptr)                                       \
1156         KUNIT_EXPECT_NOT_NULL_MSG(test,                                        \
1157                                   ptr,                                         \
1158                                   NULL)
1159
1160 #define KUNIT_EXPECT_NOT_NULL_MSG(test, ptr, fmt, ...)                         \
1161         KUNIT_BINARY_PTR_ASSERTION(test,                                       \
1162                                    KUNIT_EXPECTATION,                          \
1163                                    ptr, !=, NULL,                              \
1164                                    fmt,                                        \
1165                                    ##__VA_ARGS__)
1166
1167 /**
1168  * KUNIT_EXPECT_NOT_ERR_OR_NULL() - Expects that @ptr is not null and not err.
1169  * @test: The test context object.
1170  * @ptr: an arbitrary pointer.
1171  *
1172  * Sets an expectation that the value that @ptr evaluates to is not null and not
1173  * an errno stored in a pointer. This is semantically equivalent to
1174  * KUNIT_EXPECT_TRUE(@test, !IS_ERR_OR_NULL(@ptr)). See KUNIT_EXPECT_TRUE() for
1175  * more information.
1176  */
1177 #define KUNIT_EXPECT_NOT_ERR_OR_NULL(test, ptr) \
1178         KUNIT_EXPECT_NOT_ERR_OR_NULL_MSG(test, ptr, NULL)
1179
1180 #define KUNIT_EXPECT_NOT_ERR_OR_NULL_MSG(test, ptr, fmt, ...)                  \
1181         KUNIT_PTR_NOT_ERR_OR_NULL_MSG_ASSERTION(test,                          \
1182                                                 KUNIT_EXPECTATION,             \
1183                                                 ptr,                           \
1184                                                 fmt,                           \
1185                                                 ##__VA_ARGS__)
1186
1187 #define KUNIT_ASSERT_FAILURE(test, fmt, ...) \
1188         KUNIT_FAIL_ASSERTION(test, KUNIT_ASSERTION, fmt, ##__VA_ARGS__)
1189
1190 /**
1191  * KUNIT_ASSERT_TRUE() - Sets an assertion that @condition is true.
1192  * @test: The test context object.
1193  * @condition: an arbitrary boolean expression. The test fails and aborts when
1194  * this does not evaluate to true.
1195  *
1196  * This and assertions of the form `KUNIT_ASSERT_*` will cause the test case to
1197  * fail *and immediately abort* when the specified condition is not met. Unlike
1198  * an expectation failure, it will prevent the test case from continuing to run;
1199  * this is otherwise known as an *assertion failure*.
1200  */
1201 #define KUNIT_ASSERT_TRUE(test, condition) \
1202         KUNIT_ASSERT_TRUE_MSG(test, condition, NULL)
1203
1204 #define KUNIT_ASSERT_TRUE_MSG(test, condition, fmt, ...)                       \
1205         KUNIT_TRUE_MSG_ASSERTION(test,                                         \
1206                                  KUNIT_ASSERTION,                              \
1207                                  condition,                                    \
1208                                  fmt,                                          \
1209                                  ##__VA_ARGS__)
1210
1211 /**
1212  * KUNIT_ASSERT_FALSE() - Sets an assertion that @condition is false.
1213  * @test: The test context object.
1214  * @condition: an arbitrary boolean expression.
1215  *
1216  * Sets an assertion that the value that @condition evaluates to is false. This
1217  * is the same as KUNIT_EXPECT_FALSE(), except it causes an assertion failure
1218  * (see KUNIT_ASSERT_TRUE()) when the assertion is not met.
1219  */
1220 #define KUNIT_ASSERT_FALSE(test, condition) \
1221         KUNIT_ASSERT_FALSE_MSG(test, condition, NULL)
1222
1223 #define KUNIT_ASSERT_FALSE_MSG(test, condition, fmt, ...)                      \
1224         KUNIT_FALSE_MSG_ASSERTION(test,                                        \
1225                                   KUNIT_ASSERTION,                             \
1226                                   condition,                                   \
1227                                   fmt,                                         \
1228                                   ##__VA_ARGS__)
1229
1230 /**
1231  * KUNIT_ASSERT_EQ() - Sets an assertion that @left and @right are equal.
1232  * @test: The test context object.
1233  * @left: an arbitrary expression that evaluates to a primitive C type.
1234  * @right: an arbitrary expression that evaluates to a primitive C type.
1235  *
1236  * Sets an assertion that the values that @left and @right evaluate to are
1237  * equal. This is the same as KUNIT_EXPECT_EQ(), except it causes an assertion
1238  * failure (see KUNIT_ASSERT_TRUE()) when the assertion is not met.
1239  */
1240 #define KUNIT_ASSERT_EQ(test, left, right) \
1241         KUNIT_ASSERT_EQ_MSG(test, left, right, NULL)
1242
1243 #define KUNIT_ASSERT_EQ_MSG(test, left, right, fmt, ...)                       \
1244         KUNIT_BINARY_INT_ASSERTION(test,                                       \
1245                                    KUNIT_ASSERTION,                            \
1246                                    left, ==, right,                            \
1247                                    fmt,                                        \
1248                                     ##__VA_ARGS__)
1249
1250 /**
1251  * KUNIT_ASSERT_PTR_EQ() - Asserts that pointers @left and @right are equal.
1252  * @test: The test context object.
1253  * @left: an arbitrary expression that evaluates to a pointer.
1254  * @right: an arbitrary expression that evaluates to a pointer.
1255  *
1256  * Sets an assertion that the values that @left and @right evaluate to are
1257  * equal. This is the same as KUNIT_EXPECT_EQ(), except it causes an assertion
1258  * failure (see KUNIT_ASSERT_TRUE()) when the assertion is not met.
1259  */
1260 #define KUNIT_ASSERT_PTR_EQ(test, left, right) \
1261         KUNIT_ASSERT_PTR_EQ_MSG(test, left, right, NULL)
1262
1263 #define KUNIT_ASSERT_PTR_EQ_MSG(test, left, right, fmt, ...)                   \
1264         KUNIT_BINARY_PTR_ASSERTION(test,                                       \
1265                                    KUNIT_ASSERTION,                            \
1266                                    left, ==, right,                            \
1267                                    fmt,                                        \
1268                                    ##__VA_ARGS__)
1269
1270 /**
1271  * KUNIT_ASSERT_NE() - An assertion that @left and @right are not equal.
1272  * @test: The test context object.
1273  * @left: an arbitrary expression that evaluates to a primitive C type.
1274  * @right: an arbitrary expression that evaluates to a primitive C type.
1275  *
1276  * Sets an assertion that the values that @left and @right evaluate to are not
1277  * equal. This is the same as KUNIT_EXPECT_NE(), except it causes an assertion
1278  * failure (see KUNIT_ASSERT_TRUE()) when the assertion is not met.
1279  */
1280 #define KUNIT_ASSERT_NE(test, left, right) \
1281         KUNIT_ASSERT_NE_MSG(test, left, right, NULL)
1282
1283 #define KUNIT_ASSERT_NE_MSG(test, left, right, fmt, ...)                       \
1284         KUNIT_BINARY_INT_ASSERTION(test,                                       \
1285                                    KUNIT_ASSERTION,                            \
1286                                    left, !=, right,                            \
1287                                    fmt,                                        \
1288                                     ##__VA_ARGS__)
1289
1290 /**
1291  * KUNIT_ASSERT_PTR_NE() - Asserts that pointers @left and @right are not equal.
1292  * KUNIT_ASSERT_PTR_EQ() - Asserts that pointers @left and @right are equal.
1293  * @test: The test context object.
1294  * @left: an arbitrary expression that evaluates to a pointer.
1295  * @right: an arbitrary expression that evaluates to a pointer.
1296  *
1297  * Sets an assertion that the values that @left and @right evaluate to are not
1298  * equal. This is the same as KUNIT_EXPECT_NE(), except it causes an assertion
1299  * failure (see KUNIT_ASSERT_TRUE()) when the assertion is not met.
1300  */
1301 #define KUNIT_ASSERT_PTR_NE(test, left, right) \
1302         KUNIT_ASSERT_PTR_NE_MSG(test, left, right, NULL)
1303
1304 #define KUNIT_ASSERT_PTR_NE_MSG(test, left, right, fmt, ...)                   \
1305         KUNIT_BINARY_PTR_ASSERTION(test,                                       \
1306                                    KUNIT_ASSERTION,                            \
1307                                    left, !=, right,                            \
1308                                    fmt,                                        \
1309                                    ##__VA_ARGS__)
1310 /**
1311  * KUNIT_ASSERT_LT() - An assertion that @left is less than @right.
1312  * @test: The test context object.
1313  * @left: an arbitrary expression that evaluates to a primitive C type.
1314  * @right: an arbitrary expression that evaluates to a primitive C type.
1315  *
1316  * Sets an assertion that the value that @left evaluates to is less than the
1317  * value that @right evaluates to. This is the same as KUNIT_EXPECT_LT(), except
1318  * it causes an assertion failure (see KUNIT_ASSERT_TRUE()) when the assertion
1319  * is not met.
1320  */
1321 #define KUNIT_ASSERT_LT(test, left, right) \
1322         KUNIT_ASSERT_LT_MSG(test, left, right, NULL)
1323
1324 #define KUNIT_ASSERT_LT_MSG(test, left, right, fmt, ...)                       \
1325         KUNIT_BINARY_INT_ASSERTION(test,                                       \
1326                                    KUNIT_ASSERTION,                            \
1327                                    left, <, right,                             \
1328                                    fmt,                                        \
1329                                     ##__VA_ARGS__)
1330 /**
1331  * KUNIT_ASSERT_LE() - An assertion that @left is less than or equal to @right.
1332  * @test: The test context object.
1333  * @left: an arbitrary expression that evaluates to a primitive C type.
1334  * @right: an arbitrary expression that evaluates to a primitive C type.
1335  *
1336  * Sets an assertion that the value that @left evaluates to is less than or
1337  * equal to the value that @right evaluates to. This is the same as
1338  * KUNIT_EXPECT_LE(), except it causes an assertion failure (see
1339  * KUNIT_ASSERT_TRUE()) when the assertion is not met.
1340  */
1341 #define KUNIT_ASSERT_LE(test, left, right) \
1342         KUNIT_ASSERT_LE_MSG(test, left, right, NULL)
1343
1344 #define KUNIT_ASSERT_LE_MSG(test, left, right, fmt, ...)                       \
1345         KUNIT_BINARY_INT_ASSERTION(test,                                       \
1346                                    KUNIT_ASSERTION,                            \
1347                                    left, <=, right,                            \
1348                                    fmt,                                        \
1349                                     ##__VA_ARGS__)
1350
1351 /**
1352  * KUNIT_ASSERT_GT() - An assertion that @left is greater than @right.
1353  * @test: The test context object.
1354  * @left: an arbitrary expression that evaluates to a primitive C type.
1355  * @right: an arbitrary expression that evaluates to a primitive C type.
1356  *
1357  * Sets an assertion that the value that @left evaluates to is greater than the
1358  * value that @right evaluates to. This is the same as KUNIT_EXPECT_GT(), except
1359  * it causes an assertion failure (see KUNIT_ASSERT_TRUE()) when the assertion
1360  * is not met.
1361  */
1362 #define KUNIT_ASSERT_GT(test, left, right) \
1363         KUNIT_ASSERT_GT_MSG(test, left, right, NULL)
1364
1365 #define KUNIT_ASSERT_GT_MSG(test, left, right, fmt, ...)                       \
1366         KUNIT_BINARY_INT_ASSERTION(test,                                       \
1367                                    KUNIT_ASSERTION,                            \
1368                                    left, >, right,                             \
1369                                    fmt,                                        \
1370                                     ##__VA_ARGS__)
1371
1372 /**
1373  * KUNIT_ASSERT_GE() - Assertion that @left is greater than or equal to @right.
1374  * @test: The test context object.
1375  * @left: an arbitrary expression that evaluates to a primitive C type.
1376  * @right: an arbitrary expression that evaluates to a primitive C type.
1377  *
1378  * Sets an assertion that the value that @left evaluates to is greater than the
1379  * value that @right evaluates to. This is the same as KUNIT_EXPECT_GE(), except
1380  * it causes an assertion failure (see KUNIT_ASSERT_TRUE()) when the assertion
1381  * is not met.
1382  */
1383 #define KUNIT_ASSERT_GE(test, left, right) \
1384         KUNIT_ASSERT_GE_MSG(test, left, right, NULL)
1385
1386 #define KUNIT_ASSERT_GE_MSG(test, left, right, fmt, ...)                       \
1387         KUNIT_BINARY_INT_ASSERTION(test,                                       \
1388                                    KUNIT_ASSERTION,                            \
1389                                    left, >=, right,                            \
1390                                    fmt,                                        \
1391                                     ##__VA_ARGS__)
1392
1393 /**
1394  * KUNIT_ASSERT_STREQ() - An assertion that strings @left and @right are equal.
1395  * @test: The test context object.
1396  * @left: an arbitrary expression that evaluates to a null terminated string.
1397  * @right: an arbitrary expression that evaluates to a null terminated string.
1398  *
1399  * Sets an assertion that the values that @left and @right evaluate to are
1400  * equal. This is the same as KUNIT_EXPECT_STREQ(), except it causes an
1401  * assertion failure (see KUNIT_ASSERT_TRUE()) when the assertion is not met.
1402  */
1403 #define KUNIT_ASSERT_STREQ(test, left, right) \
1404         KUNIT_ASSERT_STREQ_MSG(test, left, right, NULL)
1405
1406 #define KUNIT_ASSERT_STREQ_MSG(test, left, right, fmt, ...)                    \
1407         KUNIT_BINARY_STR_ASSERTION(test,                                       \
1408                                    KUNIT_ASSERTION,                            \
1409                                    left, ==, right,                            \
1410                                    fmt,                                        \
1411                                    ##__VA_ARGS__)
1412
1413 /**
1414  * KUNIT_ASSERT_STRNEQ() - Expects that strings @left and @right are not equal.
1415  * @test: The test context object.
1416  * @left: an arbitrary expression that evaluates to a null terminated string.
1417  * @right: an arbitrary expression that evaluates to a null terminated string.
1418  *
1419  * Sets an expectation that the values that @left and @right evaluate to are
1420  * not equal. This is semantically equivalent to
1421  * KUNIT_ASSERT_TRUE(@test, strcmp((@left), (@right))). See KUNIT_ASSERT_TRUE()
1422  * for more information.
1423  */
1424 #define KUNIT_ASSERT_STRNEQ(test, left, right) \
1425         KUNIT_ASSERT_STRNEQ_MSG(test, left, right, NULL)
1426
1427 #define KUNIT_ASSERT_STRNEQ_MSG(test, left, right, fmt, ...)                   \
1428         KUNIT_BINARY_STR_ASSERTION(test,                                       \
1429                                    KUNIT_ASSERTION,                            \
1430                                    left, !=, right,                            \
1431                                    fmt,                                        \
1432                                    ##__VA_ARGS__)
1433
1434 /**
1435  * KUNIT_ASSERT_NULL() - Asserts that pointers @ptr is null.
1436  * @test: The test context object.
1437  * @ptr: an arbitrary pointer.
1438  *
1439  * Sets an assertion that the values that @ptr evaluates to is null. This is
1440  * the same as KUNIT_EXPECT_NULL(), except it causes an assertion
1441  * failure (see KUNIT_ASSERT_TRUE()) when the assertion is not met.
1442  */
1443 #define KUNIT_ASSERT_NULL(test, ptr) \
1444         KUNIT_ASSERT_NULL_MSG(test,                                            \
1445                               ptr,                                             \
1446                               NULL)
1447
1448 #define KUNIT_ASSERT_NULL_MSG(test, ptr, fmt, ...) \
1449         KUNIT_BINARY_PTR_ASSERTION(test,                                       \
1450                                    KUNIT_ASSERTION,                            \
1451                                    ptr, ==, NULL,                              \
1452                                    fmt,                                        \
1453                                    ##__VA_ARGS__)
1454
1455 /**
1456  * KUNIT_ASSERT_NOT_NULL() - Asserts that pointers @ptr is not null.
1457  * @test: The test context object.
1458  * @ptr: an arbitrary pointer.
1459  *
1460  * Sets an assertion that the values that @ptr evaluates to is not null. This
1461  * is the same as KUNIT_EXPECT_NOT_NULL(), except it causes an assertion
1462  * failure (see KUNIT_ASSERT_TRUE()) when the assertion is not met.
1463  */
1464 #define KUNIT_ASSERT_NOT_NULL(test, ptr) \
1465         KUNIT_ASSERT_NOT_NULL_MSG(test,                                        \
1466                                   ptr,                                         \
1467                                   NULL)
1468
1469 #define KUNIT_ASSERT_NOT_NULL_MSG(test, ptr, fmt, ...) \
1470         KUNIT_BINARY_PTR_ASSERTION(test,                                       \
1471                                    KUNIT_ASSERTION,                            \
1472                                    ptr, !=, NULL,                              \
1473                                    fmt,                                        \
1474                                    ##__VA_ARGS__)
1475
1476 /**
1477  * KUNIT_ASSERT_NOT_ERR_OR_NULL() - Assertion that @ptr is not null and not err.
1478  * @test: The test context object.
1479  * @ptr: an arbitrary pointer.
1480  *
1481  * Sets an assertion that the value that @ptr evaluates to is not null and not
1482  * an errno stored in a pointer. This is the same as
1483  * KUNIT_EXPECT_NOT_ERR_OR_NULL(), except it causes an assertion failure (see
1484  * KUNIT_ASSERT_TRUE()) when the assertion is not met.
1485  */
1486 #define KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr) \
1487         KUNIT_ASSERT_NOT_ERR_OR_NULL_MSG(test, ptr, NULL)
1488
1489 #define KUNIT_ASSERT_NOT_ERR_OR_NULL_MSG(test, ptr, fmt, ...)                  \
1490         KUNIT_PTR_NOT_ERR_OR_NULL_MSG_ASSERTION(test,                          \
1491                                                 KUNIT_ASSERTION,               \
1492                                                 ptr,                           \
1493                                                 fmt,                           \
1494                                                 ##__VA_ARGS__)
1495
1496 /**
1497  * KUNIT_ARRAY_PARAM() - Define test parameter generator from an array.
1498  * @name:  prefix for the test parameter generator function.
1499  * @array: array of test parameters.
1500  * @get_desc: function to convert param to description; NULL to use default
1501  *
1502  * Define function @name_gen_params which uses @array to generate parameters.
1503  */
1504 #define KUNIT_ARRAY_PARAM(name, array, get_desc)                                                \
1505         static const void *name##_gen_params(const void *prev, char *desc)                      \
1506         {                                                                                       \
1507                 typeof((array)[0]) *__next = prev ? ((typeof(__next)) prev) + 1 : (array);      \
1508                 if (__next - (array) < ARRAY_SIZE((array))) {                                   \
1509                         void (*__get_desc)(typeof(__next), char *) = get_desc;                  \
1510                         if (__get_desc)                                                         \
1511                                 __get_desc(__next, desc);                                       \
1512                         return __next;                                                          \
1513                 }                                                                               \
1514                 return NULL;                                                                    \
1515         }
1516
1517 // TODO(dlatypov@google.com): consider eventually migrating users to explicitly
1518 // include resource.h themselves if they need it.
1519 #include <kunit/resource.h>
1520
1521 #endif /* _KUNIT_TEST_H */