libinput test suite¶
libinput ships with a number of tests all run automatically on
The primary test suite is the
libinput-test-suite. When testing,
libinput-test-suite should always be invoked to check for
behavior changes. The test suite relies on the kernel and udev to function
correctly. It is not suitable for running inside containers.
ninja test runs more than just the test suite, you must
run all tests for full coverage.
The test suite runner uses Check underneath the hood but most of the functionality is abstracted into litest wrappers.
The test suite runner has a make-like job control enabled by the
--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 Selective running of tests)
and disable parallel tests. The test suite automatically disables parallel
make when run in gdb.
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
and restart X. This will ignore any litest devices and thus not interfere
with your desktop.
Permissions required to run tests¶
Most tests require the creation of uinput devices and access to the
/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, interpreted as
“skipped” by ninja.
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
--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).
--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*"
--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*"
--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*"
--filter-group arguments can be combined with
--list to show which groups and devices will be affected.
Controlling test output¶
Each test supports the
--verbose commandline option to enable debugging
output, see libinput_log_set_priority() for details. The
environment variable, if set, also enables verbose mode.
$ ./builddir/libinput-test-suite --verbose $ LITEST_VERBOSE=1 ninja test
Installing the test suite¶
If libinput is configured to install the tests, the test suite is available
libinput test-suite command. When run as installed binary, the
behavior of the test suite changes:
libinput.soused 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
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.
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
$ meson builddir -Dtests=true -Dinstall-tests=true <other options>