97 lines
3.0 KiB
ReStructuredText
97 lines
3.0 KiB
ReStructuredText
Testing in U-Boot
|
|
=================
|
|
|
|
U-Boot has a large amount of code. This file describes how this code is
|
|
tested and what tests you should write when adding a new feature.
|
|
|
|
|
|
Running tests
|
|
-------------
|
|
|
|
To run most tests on sandbox, type this:
|
|
|
|
make check
|
|
|
|
in the U-Boot directory. Note that only the pytest suite is run using this
|
|
command.
|
|
|
|
Some tests take ages to run. To run just the quick ones, type this:
|
|
|
|
make qcheck
|
|
|
|
|
|
Sandbox
|
|
-------
|
|
U-Boot can be built as a user-space application (e.g. for Linux). This
|
|
allows test to be executed without needing target hardware. The 'sandbox'
|
|
target provides this feature and it is widely used in tests.
|
|
|
|
|
|
Pytest Suite
|
|
------------
|
|
|
|
Many tests are available using the pytest suite, in test/py. This can run
|
|
either on sandbox or on real hardware. It relies on the U-Boot console to
|
|
inject test commands and check the result. It is slower to run than C code,
|
|
but provides the ability to unify lots of tests and summarise their results.
|
|
|
|
You can run the tests on sandbox with:
|
|
|
|
./test/py/test.py --bd sandbox --build
|
|
|
|
This will produce HTML output in build-sandbox/test-log.html
|
|
|
|
See test/py/README.md for more information about the pytest suite.
|
|
|
|
|
|
tbot
|
|
----
|
|
|
|
Tbot provides a way to execute tests on target hardware. It is intended for
|
|
trying out both U-Boot and Linux (and potentially other software) on a
|
|
number of boards automatically. It can be used to create a continuous test
|
|
environment. See http://www.tbot.tools for more information.
|
|
|
|
|
|
Ad-hoc tests
|
|
------------
|
|
|
|
There are several ad-hoc tests which run outside the pytest environment:
|
|
|
|
test/fs - File system test (shell script)
|
|
test/image - FIT and legacy image tests (shell script and Python)
|
|
test/stdint - A test that stdint.h can be used in U-Boot (shell script)
|
|
trace - Test for the tracing feature (shell script)
|
|
|
|
TODO: Move these into pytest.
|
|
|
|
|
|
When to write tests
|
|
-------------------
|
|
|
|
If you add code to U-Boot without a test you are taking a risk. Even if you
|
|
perform thorough manual testing at the time of submission, it may break when
|
|
future changes are made to U-Boot. It may even break when applied to mainline,
|
|
if other changes interact with it. A good mindset is that untested code
|
|
probably doesn't work and should be deleted.
|
|
|
|
You can assume that the Pytest suite will be run before patches are accepted
|
|
to mainline, so this provides protection against future breakage.
|
|
|
|
On the other hand there is quite a bit of code that is not covered with tests,
|
|
or is covered sparingly. So here are some suggestions:
|
|
|
|
- If you are adding a new uclass, add a sandbox driver and a test that uses it
|
|
- If you are modifying code covered by an existing test, add a new test case
|
|
to cover your changes
|
|
- If the code you are modifying has not tests, consider writing one. Even a
|
|
very basic test is useful, and may be picked up and enhanced by others. It
|
|
is much easier to add onto a test - writing a new large test can seem
|
|
daunting to most contributors.
|
|
|
|
|
|
Future work
|
|
-----------
|
|
|
|
Converting existing shell scripts into pytest tests.
|