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tets/unittests: add test for DECLARE_CONSTANT()

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This commit is contained in:
Marian Buschsieweke 2021-11-10 15:09:42 +01:00
parent 58e197098d
commit f2a53c8fb3
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1 changed files with 23 additions and 0 deletions
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23
tests/unittests/tests-kernel_defines/tests-kernel_defines.c
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@ -11,6 +11,7 @@
*
* @file
*/
#include "assert.h"
#include "embUnit.h"
#include "kernel_defines.h"
@ -55,11 +56,33 @@ static void test_index_of(void)
TEST_ASSERT_EQUAL_INT(17, index_of(bar, &bar[17]));
}
static void test_declare_constant(void)
{
/* the expression that is assigned to foo is not an integer constant expression,
* but it is still constant.
*/
DECLARE_CONSTANT(foo, (uintptr_t)((void *) 7) & 3);
/* static_assert() only excepts integer constant expressions. If that
* compiles, foo is an integer constant expression (even though the value
* assigned to it was not an integer constant expression */
static_assert(foo == 3, "ensure correct value of constant foo");
/* temporarily add -Werror=vla to ensure that using foo as length in an
* array does not create variable length arrays */
#pragma GCC diagnostic push
#pragma GCC diagnostic error "-Wvla"
char test_array[foo];
#pragma GCC diagnostic pop
static_assert(sizeof(test_array) == 3, "test_array should be 3 bytes long");
}
Test *tests_kernel_defines_tests(void)
{
EMB_UNIT_TESTFIXTURES(fixtures) {
new_TestFixture(test_kernel_version),
new_TestFixture(test_index_of),
new_TestFixture(test_declare_constant),
};
EMB_UNIT_TESTCALLER(kernel_defines_tests, NULL, NULL, fixtures);