upstream u-boot with additional patches for our devices/boards: https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ; Gbit ethernet patch for some LIME2 revisions ; with SPI flash support
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u-boot/test
Tom Rini 90d75d2efc Xilinx changes for v2018.01-rc2-v2 7 years ago
..
dm power: extend prefix match to regulator-name property 7 years ago
env test: Add a command function for test execution 7 years ago
fs fs-test: Add test for a filename using '..' to go back to the root 7 years ago
image test: Move the FIT test into the correct place 7 years ago
log log: Add a test command 7 years ago
overlay test: overlay: Use cmd_ut_category() 7 years ago
py test/py: Setup variables based on HUSH selection 7 years ago
stdint
trace trace: Improve the trace test number recognition 9 years ago
Kconfig tests: Introduce DT overlay tests 8 years ago
Makefile log: Add a test command 7 years ago
README tools/tbot: update README 8 years ago
cmd_ut.c test: compression: Convert to unit test framework 7 years ago
command_ut.c env: Rename getenv/_f() to env_get() 7 years ago
common.sh
compression.c test: compression: Convert to unit test framework 7 years ago
print_ut.c test: print_ut: Add test for %ls strings 7 years ago
run test: Correct operation when tests pass 7 years ago
time_ut.c
ut.c test: Record and silence console in tests 9 years ago

README

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:

test/run

in the U-Boot directory. Note that only the pytest suite is run using this
command.


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.