[Intel-gfx] [PATCH igt v7 1/4] lib/tests: Add igt_assert_*() self-tests

[Daniel Vetter]

On Thu, Oct 29, 2015 at 11:03:55AM +0000, Daniel Stone wrote:
> Make sure our igt_assert variants are doing something that looks vaguely
> like the right thing.
> 
> Signed-off-by: Daniel Stone <daniels at collabora.com>
> ---
>  lib/tests/Makefile.sources |   1 +
>  lib/tests/igt_simple.c     | 173 +++++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 174 insertions(+)
>  create mode 100644 lib/tests/igt_simple.c
> 
> diff --git a/lib/tests/Makefile.sources b/lib/tests/Makefile.sources
> index 58ae36b..fe5df6e 100644
> --- a/lib/tests/Makefile.sources
> +++ b/lib/tests/Makefile.sources
> @@ -10,6 +10,7 @@ check_PROGRAMS = \
>  	igt_timeout \
>  	igt_invalid_subtest_name \
>  	igt_segfault \
> +	igt_simple \
>  	$(NULL)
>  
>  check_SCRIPTS = \
> diff --git a/lib/tests/igt_simple.c b/lib/tests/igt_simple.c
> new file mode 100644
> index 0000000..306b1fb
> --- /dev/null
> +++ b/lib/tests/igt_simple.c
> @@ -0,0 +1,173 @@
> +/*
> + * Copyright © 2015 Intel Corporation
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a
> + * copy of this software and associated documentation files (the "Software"),
> + * to deal in the Software without restriction, including without limitation
> + * the rights to use, copy, modify, merge, publish, distribute, sublicense,
> + * and/or sell copies of the Software, and to permit persons to whom the
> + * Software is furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice (including the next
> + * paragraph) shall be included in all copies or substantial portions of the
> + * Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
> + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
> + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
> + * IN THE SOFTWARE.
> + *
> + */
> +
> +#include <assert.h>
> +#include <errno.h>
> +#include <float.h>
> +#include <limits.h>
> +#include <math.h>
> +#include <signal.h>
> +#include <stdint.h>
> +#include <stdlib.h>
> +#include <unistd.h>
> +#include <sys/types.h>
> +#include <sys/wait.h>
> +
> +#include "igt_core.h"
> +
> +/*
> + * We need to hide assert from the cocci igt test refactor spatch.
> + *
> + * IMPORTANT: Test infrastructure tests are the only valid places where using
> + * assert is allowed.
> + */
> +#define internal_assert assert
> +
> +char test[] = "test";
> +char *argv_run[] = { test };
> +void (*test_to_run)(void) = NULL;
> +
> +/*
> + * A really tedious way of making sure we execute every negative test, and that
> + * they all really fail.
> + */
> +#define CHECK_NEG(x) { \
> +	igt_subtest_f("XFAIL_simple_%d", __LINE__) { \
> +		(*exec_before)++; \
> +		x; \
> +		raise(SIGBUS); \
> +	} \
> +	exec_total++; \
> +}
> +
> +static int do_fork(void)
> +{
> +	int pid, status;
> +	int argc;
> +
> +	switch (pid = fork()) {
> +	case -1:
> +		internal_assert(0);
> +	case 0:
> +		argc = 1;
> +		igt_simple_init(argc, argv_run);
> +		test_to_run();
> +		igt_exit();
> +	default:
> +		while (waitpid(pid, &status, 0) == -1 &&
> +		       errno == EINTR)
> +			;
> +
> +		if(WIFSIGNALED(status))
> +			return WTERMSIG(status) + 128;
> +
> +		return WEXITSTATUS(status);
> +	}
> +}
> +
> +static void test_cmpint_negative(void)
> +{
> +	int *exec_before = calloc(1, sizeof(int));
> +	int exec_total = 0;
> +
> +	CHECK_NEG(igt_assert_eq(INT_MIN, INT_MAX));
> +
> +	CHECK_NEG(igt_assert_eq_u32(0xfffffffeUL, 0xffffffffUL));
> +
> +	CHECK_NEG(igt_assert_eq_u64(0xfffeffffffffffffULL, 0xffffffffffffffffULL));
> +	CHECK_NEG(igt_assert_eq_u64(0xfffffffeffffffffULL, 0xffffffffffffffffULL));
> +	CHECK_NEG(igt_assert_eq_u64(0xfffffffffffeffffULL, 0xffffffffffffffffULL));
> +
> +	CHECK_NEG(igt_assert_eq_double(0.0, DBL_MAX));
> +	CHECK_NEG(igt_assert_eq_double(DBL_MAX, nexttoward(DBL_MAX, 0.0)));
> +
> +	if (*exec_before != exec_total)
> +		raise(SIGSEGV);
> +}
> +
> +static void test_cmpint(void)
> +{
> +	igt_assert_eq(0, 0);
> +	igt_assert_eq(INT_MAX, INT_MAX);
> +	igt_assert_eq(INT_MAX, INT_MAX);
> +	igt_assert_neq(INT_MIN, INT_MAX);
> +
> +	igt_assert_eq_u32(0, 0);
> +	igt_assert_eq_u32(0xffffffffUL, 0xffffffffUL);
> +	igt_assert_neq_u32(0xfffffffeUL, 0xffffffffUL);
> +
> +	igt_assert_eq_u64(0, 0);
> +	igt_assert_eq_u64(0xffffffffffffffffULL, 0xffffffffffffffffULL);
> +	igt_assert_neq_u64(0xfffffffffffffffeULL, 0xffffffffffffffffULL);
> +
> +	igt_assert_eq_double(0.0, 0.0);
> +	igt_assert_eq_double(DBL_MAX, DBL_MAX);
> +	igt_assert_neq_double(0.0, DBL_MAX);
> +}
> +
> +static void test_fd_negative(void)
> +{
> +	int *exec_before = calloc(1, sizeof(int));
> +	int exec_total = 0;
> +
> +	CHECK_NEG(igt_assert_fd(-1));
> +	CHECK_NEG(igt_assert_fd(INT_MIN));
> +
> +	if (*exec_before != exec_total)
> +		raise(SIGSEGV);
> +}
> +
> +static void test_fd(void)
> +{
> +	igt_assert_fd(0);
> +	igt_assert_fd(1);
> +	igt_assert_fd(INT_MAX);
> +}
> +
> +igt_main
> +{
> +	int ret;
> +
> +	igt_subtest("igt_cmpint")
> +		test_cmpint();
> +
> +	/*
> +	 * The awkward subtest dance here is because we really want to use
> +	 * subtests in our negative tests, to ensure we actually execute all
> +	 * the subtests. But we can't begin a subtest within a subtest, and
> +	 * we inherit the state from the parent, so ...
> +	 */

That kind of awkwardness is why most other library tests set up the
subtest machinery manually. Well it works ;-)

Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>

> +	test_to_run = test_cmpint_negative;
> +	ret = do_fork();
> +	igt_subtest("igt_cmpint_negative")
> +		internal_assert(ret == IGT_EXIT_FAILURE);
> +
> +	igt_subtest("igt_assert_fd")
> +		test_fd();
> +
> +	test_to_run = test_fd_negative;
> +	ret = do_fork();
> +	igt_subtest("igt_assert_fd_negative")
> +		internal_assert(ret == IGT_EXIT_FAILURE);
> +}
> -- 
> 2.5.0
> 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch