commit | fb5f13895abd292bddfaf7bc355d66ae3c97e1dd | [log] [tgz] |
---|---|---|
author | Mengqi Guo <mqg@chromium.org> | Tue Nov 20 12:16:09 2018 -0800 |
committer | chrome-bot <chrome-bot@chromium.org> | Tue Dec 04 00:11:33 2018 -0800 |
tree | 4dbd0eb4d1a80e42d532be6399dbde46406fab62 | |
parent | e99939627669f7d3bf65d34fc5a1c48b97b5cba6 [diff] |
retry.py: add exponential backoff In server side autotest power_ServoV4ChargeWrapper, we would like to be able to send command to Servo v4 to control whether it is a power source or sink for the DUT. After sending the command, we would like to check that the command we send is actually effective, by querying the power role of Servo v4, and by checking the DUT power status. It usually take around 1 second for the change to take effect, so we need a retry decorator to keep querying until success or timeout. Exponential backoff in the retry decorator helps us reduce the number of times to retry, but still responds fast if Servo v4 command succeeds quickly. Thus, we are adding the option to exponentially increase delay time, while preserving the randomization. BUG=b:117681170 TEST=test power_ServoV4ChargeWrapper modified in a later CL test_that <DUT ip> power_ServoV4ChargeWrapper --args 'test=power_Dummy' \ --autotest_dir ~/trunk/src/third_party/autotest/files/ Change-Id: I6aa84e864aa7507070f91ca0ac289dab23bddf82 Reviewed-on: https://chromium-review.googlesource.com/1345457 Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com> Tested-by: Mengqi Guo <mqg@chromium.org> Reviewed-by: Mengqi Guo <mqg@chromium.org>
Autotest is a framework for fully automated testing. It was originally designed to test the Linux kernel, and expanded by the Chrome OS team to validate complete system images of Chrome OS and Android.
Autotest is composed of a number of modules that will help you to do stand alone tests or setup a fully automated test grid, depending on what you are up to. A non extensive list of functionality is:
A body of code to run tests on the device under test. In this setup, test logic executes on the machine being tested, and results are written to files for later collection from a development machine or lab infrastructure.
A body of code to run tests against a remote device under test. In this setup, test logic executes on a development machine or piece of lab infrastructure, and the device under test is controlled remotely via SSH/adb/some combination of the above.
Developer tools to execute one or more tests. test_that
for Chrome OS and test_droid
for Android allow developers to run tests against a device connected to their development machine on their desk. These tools are written so that the same test logic that runs in the lab will run at their desk, reducing the number of configurations under which tests are run.
Lab infrastructure to automate the running of tests. This infrastructure is capable of managing and running tests against thousands of devices in various lab environments. This includes code for both synchronous and asynchronous scheduling of tests. Tests are run against this hardware daily to validate every build of Chrome OS.
Infrastructure to set up miniature replicas of a full lab. A full lab does entail a certain amount of administrative work which isn't appropriate for a work group interested in automated tests against a small set of devices. Since this scale is common during device bringup, a special setup, called Moblab, allows a natural progressing from desk -> mini lab -> full lab.
See the guides to test_that
and test_droid
:
See the best practices guide, existing tests, and comments in the code.
git clone https://chromium.googlesource.com/chromiumos/third_party/autotest
See the coding style guide for guidance on submitting patches.
You need to run utils/build_externals.py
to set up the dependencies for pre-upload hook tests.