Simon Glass 65e25bea59 dm: Rename DM_GET_DRIVER() to DM_DRIVER_GET() 3 anni fa
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cmd 2c02152a8e setexpr: Add support for strings 3 anni fa
dm 65e25bea59 dm: Rename DM_GET_DRIVER() to DM_DRIVER_GET() 3 anni fa
env 96434a76fd env: Allow returning errors from hdelete_r() 3 anni fa
fs 84f0415201 Consistently use nproc for counting the CPUs 4 anni fa
image 280fafff16 test: Update test-imagetools.sh to match new syntax 5 anni fa
lib fbc33df13c test: Add a test for getopt 3 anni fa
log 89723b9494 test: Add a test for log filter-* 3 anni fa
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py acfb5308f5 sandbox: Drop unnecessary test node 3 anni fa
stdint dee37fc99d Remove <inttypes.h> includes and PRI* usages in printf() entirely 5 anni fa
trace 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style 6 anni fa
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cmd_ut.c f158ba15ee bootm: Add tests for fixup_silent_linux() 3 anni fa
command_ut.c f7ae49fc4f common: Drop log.h from common header 4 anni fa
common.sh 84f0415201 Consistently use nproc for counting the CPUs 4 anni fa
compression.c f91f366bd5 test: Use ut_asserteq_mem() where possible 4 anni fa
nokia_rx51_test.sh 56847f3a5e Nokia RX-51: Update test script 3 anni fa
print_ut.c f7ae49fc4f common: Drop log.h from common header 4 anni fa
run 7b51bf770a test: Run SPL unit tests 3 anni fa
str_ut.c 0914011310 command: Remove the cmd_tbl_t typedef 4 anni fa
time_ut.c c05ed00afb common: Drop linux/delay.h from common header 4 anni fa
unicode_ut.c fe179d7fb5 efi_loader: Add size checks to efi_create_indexed_name() 3 anni fa
ut.c 33d7edfd5f test: Add a way to check part of a console line or skip it 3 anni fa

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:

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.