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tests: Preserve empty arguments in test command lines

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This will now preserve empty values in the TEST_LAUNCHER and
CROSSCOMPILING_EMULATOR target properties for tests added by:

- The add_test() command.
- The ExternalData_Add_Test() command from the ExternalData module.
- The gtest_add_tests() or gtest_discover_tests() commands from the
  GoogleTest module.

For the gtest_add_tests() and gtest_discover_tests() commands,
empty elements in the values passed after the EXTRA_ARGS keyword
are also now preserved.

Policy CMP0178 is added to provide backward compatibility with the
old behavior where empty values were silently discarded from the
above cases.

Fixes: #26337
This commit is contained in:
Craig Scott
2024-09-30 21:13:13 +10:00
parent 9f1703530b
commit fc7aa3cd69
27 changed files with 512 additions and 80 deletions
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Help/release/dev/preserve-empty-args-test-command-lines.rst
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preserve-empty-args-test-command-lines
--------------------------------------
* Empty list elements in the :prop_tgt:`TEST_LAUNCHER` and
:prop_tgt:`CROSSCOMPILING_EMULATOR` target properties are now preserved
when the executable for a command given to :command:`add_test` is a CMake
target. See policy :policy:`CMP0178`.
* Empty list elements in the :prop_tgt:`TEST_LAUNCHER` and
:prop_tgt:`CROSSCOMPILING_EMULATOR` target properties are now preserved
for the test created by :command:`ExternalData_Add_Test` from the
:module:`ExternalData` module. See policy :policy:`CMP0178`.
* Empty list elements in the :prop_tgt:`TEST_LAUNCHER` and
:prop_tgt:`CROSSCOMPILING_EMULATOR` target properties are now preserved
for tests created by :command:`gtest_add_tests` and
:command:`gtest_discover_tests` from the :module:`GoogleTest` module.
Empty list elements after the ``EXTRA_ARGS`` keyword of these two commands
are also now preserved. See policy :policy:`CMP0178`.