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Revert commit v3.8.0-rc1~305^2 (Remove CTestTestfile.cmake when BUILD_TESTING is OFF, 2016-11-14) again. We reverted it once in commit v3.8.0-rc3~22^2 (Revert "Remove CTestTestfile.cmake when BUILD_TESTING is OFF", 2017-03-06) but it was accidentally restored by commit v3.11.0-rc1~387^2 (server: add "ctestInfo" request to get test info, 2017-10-25), perhaps due to conflict resolution during rebase. We cannot remove `CTestTestfile.cmake` when testing is off because it breaks projects that never enable testing but create their own `CTestTestfile.cmake` manually instead. Revert the change again and add a test case.
CMake Tests Directory ********************* This directory contains the CMake test suite. See also the `CMake Source Code Guide`_. .. _`CMake Source Code Guide`: ../Help/dev/source.rst Many tests exist as immediate subdirectories, but some tests are organized as follows. * ``CMakeLib/``: Source code, used for tests, that links to the ``CMakeLib`` library defined over in ``Source/``. * ``CMakeOnly/``: Deprecated. Tests that run CMake to generate a project but not build it. Superseded by ``Tests/RunCMake/``. * ``Find*/``: Tests for specific find modules that can only be run on machines with the corresponding packages installed. They are enabled in ``CMakeLists.txt`` by undocumented options used on CI builds. * ``Module/``: Tests for specific CMake modules. * ``RunCMake/``: Tests that run CMake and/or other tools while precisely checking their return code and stdout/stderr content. Useful for testing error cases and diagnostic output.