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Filename : FIXTURES_SETUP.rst
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FIXTURES_SETUP
--------------

.. versionadded:: 3.7

Specifies a list of fixtures for which the test is to be treated as a setup
test. These fixture names are distinct from test case names and are not
required to have any similarity to the names of tests associated with them.

Fixture setup tests are ordinary tests with all of the usual test
functionality. Setting the ``FIXTURES_SETUP`` property for a test has two
primary effects:

- CTest will ensure the test executes before any other test which lists the
  fixture name(s) in its :prop_test:`FIXTURES_REQUIRED` property.

- If CTest is asked to run only a subset of tests (e.g. using regular
  expressions or the ``--rerun-failed`` option) and the setup test is not in
  the set of tests to run, it will automatically be added if any tests in the
  set require any fixture listed in ``FIXTURES_SETUP``.

A setup test can have multiple fixtures listed in its ``FIXTURES_SETUP``
property. It will execute only once for the whole CTest run, not once for each
fixture. A fixture can also have more than one setup test defined. If there are
multiple setup tests for a fixture, projects can control their order with the
usual :prop_test:`DEPENDS` test property if necessary.

A setup test is allowed to require other fixtures, but not any fixture listed
in its ``FIXTURES_SETUP`` property. For example:

.. code-block:: cmake

  # Ok: dependent fixture is different to setup
  set_tests_properties(setupFoo PROPERTIES
    FIXTURES_SETUP    Foo
    FIXTURES_REQUIRED Bar
  )

  # Error: cannot require same fixture as setup
  set_tests_properties(setupFoo PROPERTIES
    FIXTURES_SETUP    Foo
    FIXTURES_REQUIRED Foo
  )

If any of a fixture's setup tests fail, none of the tests listing that fixture
in its :prop_test:`FIXTURES_REQUIRED` property will be run. Cleanup tests will,
however, still be executed.

See :prop_test:`FIXTURES_REQUIRED` for a more complete discussion of how to use
test fixtures.