libfprint/tests
Benjamin Berg 55a2bb5536 Generate a hwdb instead of udev rules
We only use the rules/hwdb to enable auto-suspend. So, instead of
shipping our own rules, we can just use the existing autosuspend rules
and ship a hwdb that sets the appropriate flag.

Closes: #336
2021-01-19 14:21:44 +01:00
..
aes3500 tests: Add AES3500 test case 2020-09-29 10:35:48 +02:00
elan tests/elan: Fix typos 2020-04-14 13:51:02 +02:00
goodixmoc goodixmoc: support finger status report 2021-01-05 13:36:17 +00:00
synaptics synaptics: check if current firmware supports during device probe 2021-01-12 18:49:36 +08:00
vfs0050 tests: Add test for vfs0050 driver 2020-06-05 15:03:38 +00:00
vfs301 tests: Add a new test for vfs301 2020-11-05 15:55:09 +01:00
vfs5011 assembling: Use fixed point for image assembly 2019-11-28 20:41:45 +00:00
capture.py tests: Ensure objects are free'ed at the end of tests 2019-12-16 10:20:49 +00:00
meson.build Generate a hwdb instead of udev rules 2021-01-19 14:21:44 +01:00
README.md tests: Mention permissions in test docs 2020-12-17 13:59:53 +01:00
test-device-fake.c tests: An enrolled print needs to have a type set 2020-06-05 14:48:57 +00:00
test-device-fake.h test-fpi-device: Verify device action error operations 2020-01-17 19:44:52 +01:00
test-fp-context.c tests: Fix typo in comment 2020-12-17 13:59:53 +01:00
test-fp-device.c fp-device: Add finger-status property 2020-11-07 13:23:30 +00:00
test-fpi-assembling.c nbis: Apply patch to fix scan-build warnings 2020-05-07 14:22:02 +00:00
test-fpi-device.c test-fpi-device: Do deep comparison of gallery 2020-12-09 11:47:33 +01:00
test-fpi-ssm.c Uncrustify with newer version 2020-06-02 11:56:19 +00:00
test-runner.sh tests: Add basic unit tests for fp-context 2019-12-14 17:20:45 +01:00
test-utils.c tests: Add fp-device basic unit tests 2019-12-14 17:20:45 +01:00
test-utils.h tests: Add fp-device basic unit tests 2019-12-14 17:20:45 +01:00
umockdev-test.py tests: Mark umockdev-test.py executable 2021-01-13 14:45:07 +01:00
unittest_inspector.py tests: Make meson be aware of the single python unit tests 2020-02-10 11:41:40 +01:00
valgrind-python.supp tests: Add setup mode to run tests using valgrind 2019-11-27 21:40:43 +01:00
virtual-image.py fp-image-device: Report finger status changes to the device 2020-11-07 13:23:30 +00:00

umockdev Tests

umockdev tests use fingerprint devices mocked by umockdev toolchain.

This document describes how to create a 'capture' test: a test that captures a picture of a fingerprint from the device (mocked by umockdev) and compares it with the standard one.

Other kinds of umockdev tests could be created in a similar manner.

'Capture' Test Creation

A new 'capture' test is created by means of capture.py script:

  1. Create (if needed) a directory for the driver under tests directory:

    mkdir DRIVER

  2. Prepare your execution environment.

    In the next step a working and up to date libfprint is needed. This can be achieved by installing it into your system. Alternatively, you can set the following environment variables to run a local build:

    • export LD_PRELOAD=<meson-build-dir>/libfprint/libfprint-2.so
    • export GI_TYPELIB_PATH=<meson-build-dir>/libfprint

    Also, sometimes the driver must be adapted to the emulated environment (mainly if it uses random numbers, see synaptics.c for an example). Set the following environment variable to enable this adaptation:

    • export FP_DEVICE_EMULATION=1

    Run the next steps in the same terminal.

  3. Find the real USB fingerprint device with lsusb, e.g.:

    Bus 001 Device 005: ID 138a:0090 Validity Sensors, Inc. VFS7500 Touch Fingerprint Sensor

    The following USB device is used in the example above: /dev/bus/usb/001/005.

    For the following commands, it is assumed that the user that's running the commands has full access to the device node, whether by running the commands as root, or changing the permissions for that device node.

  4. Record information about this device:

    umockdev-record /dev/bus/usb/001/005 > DRIVER/device

  5. Record interaction of capture.py (or other test) with the device:

    umockdev-record -i /dev/bus/usb/001/005=DRIVER/capture.ioctl -- python3 ./capture.py DRIVER/capture.png

    Files capture.ioctl and capture.png will be created as the result of this command.

  6. Add driver's name to drivers_tests in the meson.build.

  7. Check whether everything works as expected.

Note. To avoid submitting a real fingerprint, the side of finger, arm, or anything else producing an image with the device can be used.

Possible Issues

umockdev-record aggressively groups URBs. In most cases, manual intervention is unfortunately required. Often, drivers do a chain of commands like: A then B each with a different reply. However, umockdev-record could create a file like this:

A
 reply 1
 reply 2
B
 reply 1
 reply 2

In that case, records must be re-ordered:

A
 reply 1
B
 reply 1
A
 reply 2
B
 reply 2

Other changes may be needed to get everything working. For example the elan driver relies on a timeout that is not reported correctly. In this case the driver works around it by interpreting the protocol error differently in the virtual environment (by means of FP_DEVICE_EMULATION environment variable).