.. _test-suite: ============================================================================== libinput test suite ============================================================================== libinput's primary test suite can be invoked with :: $ sudo ./builddir/libinput-test-suite When developing libinput, the ``libinput-test-suite`` should always be run to check for behavior changes and/or regressions. For quick iteration, the number of tests to run can be filtered, see :ref:`test-filtering`. This allows for developers to verify a subset of tests (e.g. touchpad tap-to-click) while hacking on that specific feature and only run the full suite when development is done finished. .. note:: The test suite relies on udev and the kernel, specifically uinput. It creates virtual input devices and replays the events. This may interfere with your running session. The test suite is not suitable for running inside containers. In addition, libinput ships with a set of (primarily janitorial) tests that must pass for any merge request. These tests are invoked by calling ``meson test -C builddir`` (or ``ninja test``). The ``libinput-test-suite`` is part of that test set by default. The upstream CI runs all these tests but not the ``libinput-test-suite``. This CI is run for every merge request. .. _test-job-control: ------------------------------------------------------------------------------ Job control in the test suite ------------------------------------------------------------------------------ The test suite runner has a make-like job control enabled by the ``-j`` or ``--jobs`` flag and will fork off as many parallel processes as given by this flag. The default if unspecified is 8. When debugging a specific test case failure it is recommended to employ test filtures (see :ref:`test-filtering`) and disable parallel tests. The test suite automatically disables parallel make when run in gdb. .. _test-config: ------------------------------------------------------------------------------ X.Org config to avoid interference ------------------------------------------------------------------------------ uinput devices created by the test suite are usually recognised by X as input devices. All events sent through these devices will generate X events and interfere with your desktop. Copy the file ``$srcdir/test/50-litest.conf`` into your ``/etc/X11/xorg.conf.d`` and restart X. This will ignore any litest devices and thus not interfere with your desktop. .. _test-root: ------------------------------------------------------------------------------ Permissions required to run tests ------------------------------------------------------------------------------ Most tests require the creation of uinput devices and access to the resulting ``/dev/input/eventX`` nodes. Some tests require temporary udev rules. **This usually requires the tests to be run as root**. If not run as root, the test suite runner will exit with status 77, an exit status interpreted as "skipped". .. _test-filtering: ------------------------------------------------------------------------------ Selective running of tests ------------------------------------------------------------------------------ litest's tests are grouped into test groups, test names and devices. A test group is e.g. "touchpad:tap" and incorporates all tapping-related tests for touchpads. Each test function is (usually) run with one or more specific devices. The ``--list`` commandline argument shows the list of suites and tests. This is useful when trying to figure out if a specific test is run for a device. :: $ ./builddir/libinput-test-suite --list ... pointer:left-handed: pointer_left_handed_during_click_multiple_buttons: trackpoint ms-surface-cover mouse-wheelclickcount mouse-wheelclickangle low-dpi-mouse mouse-roccat mouse-wheel-tilt mouse logitech-trackball cyborg-rat magicmouse pointer_left_handed_during_click: trackpoint ms-surface-cover mouse-wheelclickcount mouse-wheelclickangle low-dpi-mouse mouse-roccat mouse-wheel-tilt mouse logitech-trackball cyborg-rat litest-magicmouse-device pointer_left_handed: trackpoint ms-surface-cover mouse-wheelclickcount mouse-wheelclickangle low-dpi-mouse mouse-roccat mouse-wheel-tilt mouse ... In the above example, the "pointer:left-handed" suite contains multiple tests, e.g. "pointer_left_handed_during_click" (this is also the function name of the test, making it easy to grep for). This particular test is run for various devices including the trackpoint device and the magic mouse device. The "no device" entry signals that litest does not instantiate a uinput device for a specific test (though the test itself may instantiate one). The ``--filter-test`` argument enables selective running of tests through basic shell-style function name matching. For example: :: $ ./builddir/libinput-test-suite --filter-test="*1fg_tap*" The ``--filter-device`` argument enables selective running of tests through basic shell-style device name matching. The device names matched are the litest-specific shortnames, see the output of ``--list``. For example: :: $ ./builddir/libinput-test-suite --filter-device="synaptics*" The ``--filter-group`` argument enables selective running of test groups through basic shell-style test group matching. The test groups matched are litest-specific test groups, see the output of ``--list``. For example: :: $ ./builddir/libinput-test-suite --filter-group="touchpad:*hover*" The ``--filter-device`` and ``--filter-group`` arguments can be combined with ``--list`` to show which groups and devices will be affected. .. _test-verbosity: ------------------------------------------------------------------------------ Controlling test output ------------------------------------------------------------------------------ Each test supports the ``--verbose`` commandline option to enable debugging output, see **libinput_log_set_priority()** for details. The ``LITEST_VERBOSE`` environment variable, if set, also enables verbose mode. :: $ ./builddir/libinput-test-suite --verbose $ LITEST_VERBOSE=1 meson test -C builddir .. _test-installed: ------------------------------------------------------------------------------ Installing the test suite ------------------------------------------------------------------------------ If libinput is configured to install the tests, the test suite is available as the ``libinput test-suite`` command. When run as installed binary, the behavior of the test suite changes: - the ``libinput.so`` used is the one in the library lookup paths - no system-wide quirks are installed by the test suite, only those specific to the test devices - test device-specific quirks are installed in the system-wide quirks directory, usually ``/usr/share/libinput/``. It is not advisable to run ``libinput test-suite`` on a production machine. Data loss may occur. The primary use-case for the installed test suite is verification of distribution composes. .. note:: The ``prefix`` is still used by the test suite. For verification of a system package, the test suite must be configured with the same prefix. To configure libinput to install the tests, use the ``-Dinstall-tests=true`` meson option:: $ meson builddir -Dtests=true -Dinstall-tests=true .. _test-meson-suites: ------------------------------------------------------------------------------ Meson test suites ------------------------------------------------------------------------------ This section is primarily of interest to distributors that want to run test or developers working on libinput's CI. Tests invoked by ``meson test`` are grouped into test suites, the test suite names identify when the respective test can be run: - ``valgrind``: tests that can be run under valgrind (in addition to a normal run) - ``root``: tests that must be run as root - ``hardware``: tests that require a VM or physical machine - ``all``: all tests, only needed because of `meson bug 5340 `_ The suite names can be provided as filters to ``meson test --suite=`` or ``meson test --no-suite=``. For example, if running a container-based CI, you may specify the test suites as: :: $ meson test --no-suite=machine # only run container-friendly tests $ meson test --suite=valgrind --setup=valgrind # run all valgrind-compatible tests $ meson test --no-suite=root # run all tests not requiring root These suites are subject to change at any time.