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WILL_FAIL
---------
If ``true``, inverts the pass / fail test criteria. Tests for which
``WILL_FAIL`` is ``true`` fail with return code 0 and pass with non-zero
return code. Tests that exceed the timeout specified by :prop_test:`TIMEOUT`
still fail regardless of ``WILL_FAIL``.
System-level test failures including segmentation faults,
signal abort, or heap errors may fail the test even if ``WILL_FAIL`` is true.
Example of a test that would ordinarily pass, but fails because ``WILL_FAIL``
is ``true``:
.. code-block:: cmake
add_test(NAME failed COMMAND ${CMAKE_COMMAND} -E true)
set_property(TEST failed PROPERTY WILL_FAIL true)
To run a test that may have a system-level failure, but still pass if
``WILL_FAIL`` is set, use a CMake command to wrap the executable run.
Note that this will prevent automatic handling of the
:prop_tgt:`CROSSCOMPILING_EMULATOR` and :prop_tgt:`TEST_LAUNCHER`
target property.
.. code-block:: cmake
add_executable(main main.c)
add_test(NAME sigabrt COMMAND ${CMAKE_COMMAND} -E env $<TARGET_FILE:main>)
set_property(TEST sigabrt PROPERTY WILL_FAIL TRUE)
.. code-block:: c
#include <signal.h>
int main(void){ raise(SIGABRT); return 0; }
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