1 .. SPDX-License-Identifier: GPL-2.0+
3 Introduction to testing
4 =======================
6 U-Boot has a large amount of code. This file describes how this code is
7 tested and what tests you should write when adding a new feature.
13 To run most tests on sandbox, type this::
17 in the U-Boot directory. Note that only the pytest suite is run using this
20 Some tests take ages to run and are marked with @pytest.mark.slow. To run just
21 the quick ones, type this::
25 It is also possible to run just the tests for tools (patman, binman, etc.).
26 Such tests are included with those tools, i.e. no actual U-Boot unit tests are
31 You can also run a selection tests in parallel with::
35 All of the above use the test/run script with a paremeter to select which tests
36 are run. See :doc:`py_testing` for more information.
41 U-Boot can be built as a user-space application (e.g. for Linux). This
42 allows test to be executed without needing target hardware. The 'sandbox'
43 target provides this feature and it is widely used in tests.
45 See :doc:`tests_sandbox` for more information.
50 Many tests are available using the pytest suite, in test/py. This can run
51 either on sandbox or on real hardware. It relies on the U-Boot console to
52 inject test commands and check the result. It is slower to run than C code,
53 but provides the ability to unify lots of tests and summarise their results.
55 You can run the tests on sandbox with::
57 ./test/py/test.py --bd sandbox --build
59 This will produce HTML output in build-sandbox/test-log.html
61 Some tests run with other versions of sandbox. For example sandbox_flattree
62 runs the tests with livetree (the hierachical devicetree) disabled. You can
63 also select particular tests with -k::
65 ./test/py/test.py --bd sandbox_flattree --build -k hello
67 There are some special tests that run in SPL. For this you need the sandbox_spl
70 ./test/py/test.py --bd sandbox_spl --build -k test_spl
72 See test/py/README.md for more information about the pytest suite.
74 See :doc:`tests_sandbox` for how to run tests directly (not through pytest).
80 Tbot provides a way to execute tests on target hardware. It is intended for
81 trying out both U-Boot and Linux (and potentially other software) on a
82 number of boards automatically. It can be used to create a continuous test
83 environment. See http://www.tbot.tools for more information.
89 There are several ad-hoc tests which run outside the pytest environment:
92 File system test (shell script)
94 FIT and legacy image tests (shell script and Python)
96 A test that stdint.h can be used in U-Boot (shell script)
98 Test for the tracing feature (shell script)
100 TODO: Move these into pytest.
106 If you add code to U-Boot without a test you are taking a risk. Even if you
107 perform thorough manual testing at the time of submission, it may break when
108 future changes are made to U-Boot. It may even break when applied to mainline,
109 if other changes interact with it. A good mindset is that untested code
110 probably doesn't work and should be deleted.
112 You can assume that the Pytest suite will be run before patches are accepted
113 to mainline, so this provides protection against future breakage.
115 On the other hand there is quite a bit of code that is not covered with tests,
116 or is covered sparingly. So here are some suggestions:
118 - If you are adding a new uclass, add a sandbox driver and a test that uses it
119 - If you are modifying code covered by an existing test, add a new test case
120 to cover your changes
121 - If the code you are modifying has not tests, consider writing one. Even a
122 very basic test is useful, and may be picked up and enhanced by others. It
123 is much easier to add onto a test - writing a new large test can seem
124 daunting to most contributors.
126 See doc:`tests_writing` for how to write tests.
132 Converting existing shell scripts into pytest tests.