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enable_testing
--------------
Enables testing for the current directory and below:
.. code-block:: cmake
enable_testing()
This command should be invoked in the top-level source directory because
:manual:`ctest(1)` expects to find a test file in the top-level
build directory.
This command is also automatically invoked when the :module:`CTest`
module is included, except if the :variable:`BUILD_TESTING`
option is turned off.
The following restrictions apply to where ``enable_testing()`` may be called:
* It must be called in file scope, not in a :command:`function` call nor inside
a :command:`block`.
Examples
^^^^^^^^
In the following example, this command is conditionally called depending on how
the project is used. For instance, when the Example project is added via the
:module:`FetchContent` module as a subdirectory of a parent project that defines
its own tests, testing for the Example project is disabled.
.. code-block:: cmake
:caption: ``CMakeLists.txt``
project(Example)
option(Example_ENABLE_TESTING "Enable testing" ${PROJECT_IS_TOP_LEVEL})
if(Example_ENABLE_TESTING)
enable_testing()
endif()
# ...
if(Example_ENABLE_TESTING)
add_test(...)
endif()
See Also
^^^^^^^^
* The :command:`add_test` command.
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