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:prop_test:`FIXTURES_CLEANUP` property. If any of a fixture's setup tests fail,
all tests listing that fixture in their ``FIXTURES_REQUIRED`` property will not
be executed. The cleanup tests for the fixture will always be executed, even if
some setup tests fail.
When CTest is asked to execute only a subset of tests (e.g. by the use of
regular expressions or when run with the :option:`--rerun-failed <ctest --rerun-failed>`
command line option), it will automatically add any setup or cleanup tests for
fixtures required by any of the tests that are in the execution set. This
behavior can be overridden with the :option:`-FS <ctest -FS>`,
:option:`-FC <ctest -FC>` and :option:`-FA <ctest -FA>` command line options to
:manual:`ctest(1)` if desired.
Since setup and cleanup tasks are also tests, they can have an ordering
specified by the :prop_test:`DEPENDS` test property just like any other tests.
This can be exploited to implement setup or cleanup using multiple tests for a
single fixture to modularise setup or cleanup logic.
The concept of a fixture is different to that of a resource specified by
:prop_test:`RESOURCE_LOCK`, but they may be used together. A fixture defines a
set of tests which share setup and cleanup requirements, whereas a resource
lock has the effect of ensuring a particular set of tests do not run in
parallel. Some situations may need both, such as setting up a database,
serializing test access to that database and deleting the database again at the
end. For such cases, tests would populate both ``FIXTURES_REQUIRED`` and
:prop_test:`RESOURCE_LOCK` to combine the two behaviors. Names used for
:prop_test:`RESOURCE_LOCK` have no relationship with names of fixtures, so note
that a resource lock does not imply a fixture and vice versa.
Consider the following example which represents a database test scenario
similar to that mentioned above:
.. code-block:: cmake
add_test(NAME testsDone COMMAND emailResults)
add_test(NAME fooOnly COMMAND testFoo)
add_test(NAME dbOnly COMMAND testDb)
add_test(NAME dbWithFoo COMMAND testDbWithFoo)
add_test(NAME createDB COMMAND initDB)
add_test(NAME setupUsers COMMAND userCreation)
add_test(NAME cleanupDB COMMAND deleteDB)
add_test(NAME cleanupFoo COMMAND removeFoos)
set_tests_properties(setupUsers PROPERTIES DEPENDS createDB)
set_tests_properties(createDB PROPERTIES FIXTURES_SETUP DB)
set_tests_properties(setupUsers PROPERTIES FIXTURES_SETUP DB)
set_tests_properties(cleanupDB PROPERTIES FIXTURES_CLEANUP DB)
set_tests_properties(cleanupFoo PROPERTIES FIXTURES_CLEANUP Foo)
set_tests_properties(testsDone PROPERTIES FIXTURES_CLEANUP "DB;Foo")
set_tests_properties(fooOnly PROPERTIES FIXTURES_REQUIRED Foo)
set_tests_properties(dbOnly PROPERTIES FIXTURES_REQUIRED DB)
set_tests_properties(dbWithFoo PROPERTIES FIXTURES_REQUIRED "DB;Foo")
set_tests_properties(dbOnly dbWithFoo createDB setupUsers cleanupDB
PROPERTIES RESOURCE_LOCK DbAccess)
Key points from this example:
- Two fixtures are defined: ``DB`` and ``Foo``. Tests can require a single
fixture as ``fooOnly`` and ``dbOnly`` do, or they can depend on multiple
fixtures like ``dbWithFoo`` does.
- A ``DEPENDS`` relationship is set up to ensure ``setupUsers`` happens after
``createDB``, both of which are setup tests for the ``DB`` fixture and will
therefore be executed before the ``dbOnly`` and ``dbWithFoo`` tests
automatically.
- No explicit ``DEPENDS`` relationships were needed to make the setup tests run
before or the cleanup tests run after the regular tests.
- The ``Foo`` fixture has no setup tests defined, only a single cleanup test.
- ``testsDone`` is a cleanup test for both the ``DB`` and ``Foo`` fixtures.
Therefore, it will only execute once regular tests for both fixtures have
finished (i.e. after ``fooOnly``, ``dbOnly`` and ``dbWithFoo``). No
``DEPENDS`` relationship was specified for ``testsDone``, so it is free to
run before, after or concurrently with other cleanup tests for either
fixture.
- The setup and cleanup tests never list the fixtures they are for in their own
``FIXTURES_REQUIRED`` property, as that would result in a dependency on
themselves and be considered an error.
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.