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- seccomp
- test_harness.h
/*
* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by the GPLv2 license.
*
* test_harness.h: simple C unit test helper.
*
* Usage:
* #include "test_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
*
* API inspired by code.google.com/p/googletest
*/
#ifndef TEST_HARNESS_H_
#define TEST_HARNESS_H_
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
/* All exported functionality should be declared through this macro. */
#define TEST_API(x) _##x
/*
* Exported APIs
*/
/* 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
* as such. Returning early may be performed with a bare "return;" statement.
*
* EXPECT_* and ASSERT_* are valid in a TEST() { } context.
*/
#define TEST TEST_API(TEST)
/* 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
* as such. Returning early may be performed with a bare "return;" statement.
*
* EXPECT_* and ASSERT_* are valid in a TEST() { } context.
*/
#define TEST_SIGNAL TEST_API(TEST_SIGNAL)
/* 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.
*/
#define FIXTURE TEST_API(FIXTURE)
/* 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.
*/
#define FIXTURE_DATA TEST_API(FIXTURE_DATA)
/* 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
* implementation.
*
* ASSERT_* are valid for use in this context and will prempt the execution
* of any dependent fixture tests.
*
* A bare "return;" statement may be used to return early.
*/
#define FIXTURE_SETUP TEST_API(FIXTURE_SETUP)
/* 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
* implementation to clean up.
*
* A bare "return;" statement may be used to return early.
*/
#define FIXTURE_TEARDOWN TEST_API(FIXTURE_TEARDOWN)
/* 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
* datatype exposed for use by the implementation.
*/
#define TEST_F TEST_API(TEST_F)
#define TEST_F_SIGNAL TEST_API(TEST_F_SIGNAL)
/* Use once to append a main() to the test file. E.g.,
* TEST_HARNESS_MAIN
*/
#define TEST_HARNESS_MAIN TEST_API(TEST_HARNESS_MAIN)
/*
* 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 */
#define ASSERT_EQ TEST_API(ASSERT_EQ)
/* ASSERT_NE(expected, measured): expected != measured */
#define ASSERT_NE TEST_API(ASSERT_NE)
/* ASSERT_LT(expected, measured): expected < measured */
#define ASSERT_LT TEST_API(ASSERT_LT)
/* ASSERT_LE(expected, measured): expected <= measured */
#define ASSERT_LE TEST_API(ASSERT_LE)
/* ASSERT_GT(expected, measured): expected > measured */
#define ASSERT_GT TEST_API(ASSERT_GT)
/* ASSERT_GE(expected, measured): expected >= measured */
#define ASSERT_GE TEST_API(ASSERT_GE)
/* ASSERT_NULL(measured): NULL == measured */
#define ASSERT_NULL TEST_API(ASSERT_NULL)
/* ASSERT_TRUE(measured): measured != 0 */
#define ASSERT_TRUE TEST_API(ASSERT_TRUE)
/* ASSERT_FALSE(measured): measured == 0 */
#define ASSERT_FALSE TEST_API(ASSERT_FALSE)
/* ASSERT_STREQ(expected, measured): !strcmp(expected, measured) */
#define ASSERT_STREQ TEST_API(ASSERT_STREQ)
/* ASSERT_STRNE(expected, measured): strcmp(expected, measured) */
#define ASSERT_STRNE TEST_API(ASSERT_STRNE)
/* EXPECT_EQ(expected, measured): expected == measured */
#define EXPECT_EQ TEST_API(EXPECT_EQ)
/* EXPECT_NE(expected, measured): expected != measured */
#define EXPECT_NE TEST_API(EXPECT_NE)
/* EXPECT_LT(expected, measured): expected < measured */
#define EXPECT_LT TEST_API(EXPECT_LT)
/* EXPECT_LE(expected, measured): expected <= measured */
#define EXPECT_LE TEST_API(EXPECT_LE)
/* EXPECT_GT(expected, measured): expected > measured */
#define EXPECT_GT TEST_API(EXPECT_GT)
/* EXPECT_GE(expected, measured): expected >= measured */
#define EXPECT_GE TEST_API(EXPECT_GE)
/* EXPECT_NULL(measured): NULL == measured */
#define EXPECT_NULL TEST_API(EXPECT_NULL)
/* EXPECT_TRUE(measured): 0 != measured */
#define EXPECT_TRUE TEST_API(EXPECT_TRUE)
/* EXPECT_FALSE(measured): 0 == measured */
#define EXPECT_FALSE TEST_API(EXPECT_FALSE)
/* EXPECT_STREQ(expected, measured): !strcmp(expected, measured) */
#define EXPECT_STREQ TEST_API(EXPECT_STREQ)
/* EXPECT_STRNE(expected, measured): strcmp(expected, measured) */
#define EXPECT_STRNE TEST_API(EXPECT_STRNE)
/* 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 TEST_API(TH_LOG)
/*
* Internal implementation.
*
*/
/* Utilities exposed to the test definitions */
#ifndef TH_LOG_STREAM
# define TH_LOG_STREAM stderr
#endif
#ifndef TH_LOG_ENABLED
# define TH_LOG_ENABLED 1
#endif
#define _TH_LOG(fmt, ...) do { \
if (TH_LOG_ENABLED) \
__TH_LOG(fmt, ##__VA_ARGS__); \
} while (0)
/* Unconditional logger for internal use. */
#define __TH_LOG(fmt, ...) \
fprintf(TH_LOG_STREAM, "%s:%d:%s:" fmt "\n", \
__FILE__, __LINE__, _metadata->name, ##__VA_ARGS__)
/* Defines the test function and creates the registration stub. */
#define _TEST(test_name) __TEST_IMPL(test_name, -1)
#define _TEST_SIGNAL(test_name, signal) __TEST_IMPL(test_name, signal)
#define __TEST_IMPL(test_name, _signal) \
static void test_name(struct __test_metadata *_metadata); \
static struct __test_metadata _##test_name##_object = \
{ name: "global." #test_name, \
fn: &test_name, termsig: _signal }; \
static void __attribute__((constructor)) _register_##test_name(void) \
{ \
__register_test(&_##test_name##_object); \
} \
static void test_name( \
struct __test_metadata __attribute__((unused)) *_metadata)
/* Wraps the struct name so we have one less argument to pass around. */
#define _FIXTURE_DATA(fixture_name) struct _test_data_##fixture_name
/* Called once per fixture to setup the data and register. */
#define _FIXTURE(fixture_name) \
static void __attribute__((constructor)) \
_register_##fixture_name##_data(void) \
{ \
__fixture_count++; \
} \
_FIXTURE_DATA(fixture_name)
/* 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)
#define _FIXTURE_TEARDOWN(fixture_name) \
void fixture_name##_teardown( \
struct __test_metadata __attribute__((unused)) *_metadata, \
_FIXTURE_DATA(fixture_name) __attribute__((unused)) *self)
/* Emits test registration and helpers for fixture-based test
* cases.
* TODO(wad) register fixtures on dedicated test lists.
*/
#define _TEST_F(fixture_name, test_name) \
__TEST_F_IMPL(fixture_name, test_name, -1)
#define _TEST_F_SIGNAL(fixture_name, test_name, signal) \
__TEST_F_IMPL(fixture_name, test_name, signal)
#define __TEST_F_IMPL(fixture_name, test_name, signal) \
static void fixture_name##_##test_name( \
struct __test_metadata *_metadata, \
_FIXTURE_DATA(fixture_name) *self); \
static inline void wrapper_##fixture_name##_##test_name( \
struct __test_metadata *_metadata) \
{ \
/* fixture data is alloced, setup, and torn down per call. */ \
_FIXTURE_DATA(fixture_name) self; \
memset(&self, 0, sizeof(_FIXTURE_DATA(fixture_name))); \
fixture_name##_setup(_metadata, &self); \
/* Let setup failure terminate early. */ \
if (!_metadata->passed) \
return; \
fixture_name##_##test_name(_metadata, &self); \
fixture_name##_teardown(_metadata, &self); \
} \
static struct __test_metadata \
_##fixture_name##_##test_name##_object = { \
name: #fixture_name "." #test_name, \
fn: &wrapper_##fixture_name##_##test_name, \
termsig: signal, \
}; \
static void __attribute__((constructor)) \
_register_##fixture_name##_##test_name(void) \
{ \
__register_test(&_##fixture_name##_##test_name##_object); \
} \
static void fixture_name##_##test_name( \
struct __test_metadata __attribute__((unused)) *_metadata, \
_FIXTURE_DATA(fixture_name) __attribute__((unused)) *self)
/* Exports a simple wrapper to run the test harness. */
#define _TEST_HARNESS_MAIN \
static void __attribute__((constructor)) \
__constructor_order_last(void) \
{ \
if (!__constructor_order) \
__constructor_order = _CONSTRUCTOR_ORDER_BACKWARD; \
} \
int main(int argc, char **argv) { \
return test_harness_run(argc, argv); \
}
#define _ASSERT_EQ(_expected, _seen) \
__EXPECT(_expected, _seen, ==, 1)
#define _ASSERT_NE(_expected, _seen) \
__EXPECT(_expected, _seen, !=, 1)
#define _ASSERT_LT(_expected, _seen) \
__EXPECT(_expected, _seen, <, 1)
#define _ASSERT_LE(_expected, _seen) \
__EXPECT(_expected, _seen, <=, 1)
#define _ASSERT_GT(_expected, _seen) \
__EXPECT(_expected, _seen, >, 1)
#define _ASSERT_GE(_expected, _seen) \
__EXPECT(_expected, _seen, >=, 1)
#define _ASSERT_NULL(_seen) \
__EXPECT(NULL, _seen, ==, 1)
#define _ASSERT_TRUE(_seen) \
_ASSERT_NE(0, _seen)
#define _ASSERT_FALSE(_seen) \
_ASSERT_EQ(0, _seen)
#define _ASSERT_STREQ(_expected, _seen) \
__EXPECT_STR(_expected, _seen, ==, 1)
#define _ASSERT_STRNE(_expected, _seen) \
__EXPECT_STR(_expected, _seen, !=, 1)
#define _EXPECT_EQ(_expected, _seen) \
__EXPECT(_expected, _seen, ==, 0)
#define _EXPECT_NE(_expected, _seen) \
__EXPECT(_expected, _seen, !=, 0)
#define _EXPECT_LT(_expected, _seen) \
__EXPECT(_expected, _seen, <, 0)
#define _EXPECT_LE(_expected, _seen) \
__EXPECT(_expected, _seen, <=, 0)
#define _EXPECT_GT(_expected, _seen) \
__EXPECT(_expected, _seen, >, 0)
#define _EXPECT_GE(_expected, _seen) \
__EXPECT(_expected, _seen, >=, 0)
#define _EXPECT_NULL(_seen) \
__EXPECT(NULL, _seen, ==, 0)
#define _EXPECT_TRUE(_seen) \
_EXPECT_NE(0, _seen)
#define _EXPECT_FALSE(_seen) \
_EXPECT_EQ(0, _seen)
#define _EXPECT_STREQ(_expected, _seen) \
__EXPECT_STR(_expected, _seen, ==, 0)
#define _EXPECT_STRNE(_expected, _seen) \
__EXPECT_STR(_expected, _seen, !=, 0)
#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
/* Support an optional handler after and ASSERT_* or EXPECT_*. The approach is
* not thread-safe, but it should be fine in most sane test scenarios.
*
* Using __bail(), which optionally abort()s, is the easiest way to early
* return while still providing an optional block to the API consumer.
*/
#define OPTIONAL_HANDLER(_assert) \
for (; _metadata->trigger; _metadata->trigger = __bail(_assert))
#define __EXPECT(_expected, _seen, _t, _assert) do { \
/* Avoid multiple evaluation of the cases */ \
__typeof__(_expected) __exp = (_expected); \
__typeof__(_seen) __seen = (_seen); \
if (!(__exp _t __seen)) { \
unsigned long long __exp_print = (unsigned long long)__exp; \
unsigned long long __seen_print = (unsigned long long)__seen; \
__TH_LOG("Expected %s (%llu) %s %s (%llu)", \
#_expected, __exp_print, #_t, \
#_seen, __seen_print); \
_metadata->passed = 0; \
/* Ensure the optional handler is triggered */ \
_metadata->trigger = 1; \
} \
} while (0); OPTIONAL_HANDLER(_assert)
#define __EXPECT_STR(_expected, _seen, _t, _assert) do { \
const char *__exp = (_expected); \
const char *__seen = (_seen); \
if (!(strcmp(__exp, __seen) _t 0)) { \
__TH_LOG("Expected '%s' %s '%s'.", __exp, #_t, __seen); \
_metadata->passed = 0; \
_metadata->trigger = 1; \
} \
} while (0); OPTIONAL_HANDLER(_assert)
/* Contains all the information for test execution and status checking. */
struct __test_metadata {
const char *name;
void (*fn)(struct __test_metadata *);
int termsig;
int passed;
int trigger; /* extra handler after the evaluation */
struct __test_metadata *prev, *next;
};
/* Storage for the (global) tests to be run. */
static struct __test_metadata *__test_list;
static unsigned int __test_count;
static unsigned int __fixture_count;
static int __constructor_order;
#define _CONSTRUCTOR_ORDER_FORWARD 1
#define _CONSTRUCTOR_ORDER_BACKWARD -1
/*
* Since constructors are called in reverse order, reverse the test
* list so tests are run in source declaration order.
* https://gcc.gnu.org/onlinedocs/gccint/Initialization.html
* However, it seems not all toolchains do this correctly, so use
* __constructor_order to detect which direction is called first
* and adjust list building logic to get things running in the right
* direction.
*/
static inline void __register_test(struct __test_metadata *t)
{
__test_count++;
/* Circular linked list where only prev is circular. */
if (__test_list == NULL) {
__test_list = t;
t->next = NULL;
t->prev = t;
return;
}
if (__constructor_order == _CONSTRUCTOR_ORDER_FORWARD) {
t->next = NULL;
t->prev = __test_list->prev;
t->prev->next = t;
__test_list->prev = t;
} else {
t->next = __test_list;
t->next->prev = t;
t->prev = t;
__test_list = t;
}
}
static inline int __bail(int for_realz)
{
if (for_realz)
abort();
return 0;
}
void __run_test(struct __test_metadata *t)
{
pid_t child_pid;
int status;
t->passed = 1;
t->trigger = 0;
printf("[ RUN ] %s\n", t->name);
child_pid = fork();
if (child_pid < 0) {
printf("ERROR SPAWNING TEST CHILD\n");
t->passed = 0;
} else if (child_pid == 0) {
t->fn(t);
_exit(t->passed);
} else {
/* TODO(wad) add timeout support. */
waitpid(child_pid, &status, 0);
if (WIFEXITED(status)) {
t->passed = t->termsig == -1 ? WEXITSTATUS(status) : 0;
if (t->termsig != -1) {
fprintf(TH_LOG_STREAM,
"%s: Test exited normally "
"instead of by signal (code: %d)\n",
t->name,
WEXITSTATUS(status));
}
} else if (WIFSIGNALED(status)) {
t->passed = 0;
if (WTERMSIG(status) == SIGABRT) {
fprintf(TH_LOG_STREAM,
"%s: Test terminated by assertion\n",
t->name);
} else if (WTERMSIG(status) == t->termsig) {
t->passed = 1;
} else {
fprintf(TH_LOG_STREAM,
"%s: Test terminated unexpectedly "
"by signal %d\n",
t->name,
WTERMSIG(status));
}
} else {
fprintf(TH_LOG_STREAM,
"%s: Test ended in some other way [%u]\n",
t->name,
status);
}
}
printf("[ %4s ] %s\n", (t->passed ? "OK" : "FAIL"), t->name);
}
static int test_harness_run(int __attribute__((unused)) argc,
char __attribute__((unused)) **argv)
{
struct __test_metadata *t;
int ret = 0;
unsigned int count = 0;
unsigned int pass_count = 0;
/* TODO(wad) add optional arguments similar to gtest. */
printf("[==========] Running %u tests from %u test cases.\n",
__test_count, __fixture_count + 1);
for (t = __test_list; t; t = t->next) {
count++;
__run_test(t);
if (t->passed)
pass_count++;
else
ret = 1;
}
printf("[==========] %u / %u tests passed.\n", pass_count, count);
printf("[ %s ]\n", (ret ? "FAILED" : "PASSED"));
return ret;
}
static void __attribute__((constructor)) __constructor_order_first(void)
{
if (!__constructor_order)
__constructor_order = _CONSTRUCTOR_ORDER_FORWARD;
}
#endif /* TEST_HARNESS_H_ */