Tag Archives: testing

Review of Firefox desktop automation work – Q1 2016

Today is the last day of Q1 2016 which means time to review what I have done during all those last weeks. When I checked my status reports it’s kinda lot, so I will shorten it a bit and only talk about the really important changes.

Build System / Mozharness

After I had to dig into mozharness to get support for Firefox UI Tests during last quarter I have seen that more work had to be done to fully support tests which utilize Nightly or Release builds of Firefox.

The most challenging work for me (because I never did a build system patch so far) was indeed prefixing the test_packages.json file which gets uploaded next to any nightly build to archive.mozilla.org. This work was necessary because without the prefix the file was always overwritten by later build uploads. Means when trying to get the test archives for OS X and Linux always the Windows ones were returned. Due to binary incompatibilities between those platforms this situation caused complete bustage. No-one noticed that until now because any other testsuite is run on a checkin basis and doesn’t have to rely on the nightly build folders on archive.mozilla.org. For Taskcluster this wasn’t a problem.

In regards of firefox-ui-tests I was finally able to get a test task added to Taskcluster which will execute our firefox-ui-tests for each check-in and this in e10s and non-e10s mode. Due to current Taskcluster limitations this only runs for Linux64 debug, but that already helps a lot and I hope that we can increase platform coverage soon. If you are interested in the results you can have a look at Treeherder.

Other Mozharness specific changes are the following ones:

  • Fix to always copy the log files to the upload folder even in case of early aborts, e.g. failed downloads (bug 1230150)
  • Refactoring of download_unzip() method to allow support of ZipFile and TarFile instead of external commands (bug 1237706)
  • Removing hard requirement for the –symbols-url parameter to let mozcrash analyze the crash. This was possible because the minidump_stackwalk binary can automatically detect the appropriate symbols for nightly and release builds (bug 1243684)

Firefox UI Tests

The biggest change for us this quarter was the move of the Firefox UI tests from our external Github repository to mozilla-central. It means that our test code including the harness and Firefox Puppeteer is in sync with changes to Firefox now and regressions caused by ui changes should be very seldom. And with the Taskcluster task as mentioned above it’s even easier to spot those regressors on mozilla-inbound.

The move itself was easy but keeping backward compatibility with mozmill-ci and other Firefox branches down to mozilla-esr38 was a lot of work. To achieve that I first had to convert all three different modules (harness, puppeteer, tests) to individual Python packages. Those got landed for Firefox 46.0 on mozilla-central and then backported to Firefox 45.0 which also became our new ESR release. Due to backport complexity for older branches I decided to not land packages for Firefox 44.0, 43.0, and 38ESR. Instead those branches got smaller updates for the harness so that they had full support for our latest mozharness script on mozilla-central. Yes, in case you wonder all branches used mozharness from mozilla-central at this time. It was easier to do, and I finally switched to branch specific mozharness scripts later in mozmill-ci once Firefox 45.0 and its ESR release were out.

Adding mach support for Firefox UI Tests on mozilla-central was the next step to assist in running our tests. Required arguments from before are now magically selected by mach, and that allowed me to remove the firefox-ui-test dependency on firefox_harness, which was always a thorn in our eyes. As final result I was even able to completely remove the firefox-ui-test package, so that we are now free in moving our tests to any place in the tree!

In case you want to know more about our tests please check out our new documentation on MDN which can be found here:

https://developer.mozilla.org/en-US/docs/Mozilla/QA/firefox-ui-tests

Mozmill CI

Lots of changes have been done to this project to accommodate the Jenkins jobs to all the Firefox UI Tests modifications. Especially that I needed a generic solution which works for all existing Firefox versions. The first real task was to no longer use the firefox-ui-tests Github repository to grab the tests from, but instead let mozharness download the appropriate test package as produced and uploaded with builds to archive.mozilla.org.

It was all fine immediately for en-US builds given that the location of the test_packages.json file is distributed along with the Mozilla Pulse build notification. But it’s not the case for l10n builds and funsize update notifications. For those we have to utilize mozdownload to fetch the correct URL based on the version, platform, and build id. So all fine. A special situation came up for update tests which actually use two different Firefox builds. If we get the tests for the pre build, how can we magically switch the tests for the target version? Given that there is no easy way I decided to always use the tests from the target version, and in case of UI changes we have to keep backward compatibility code in our tests and Firefox Puppeteer. This is maybe the most ideal solution for us.

Another issue I had to solve with test packages was with release candidate builds. For those builds Release Engineering is not uploading nor creating any test archive. So a connection had to be made between candidate builds and CI (tinderbox) builds. As turned out the two properties which helped here are the revision and the branch. With them I at least know the changeset of the mozilla-beta, mozilla-release, and mozilla-esr* branches as used to trigger the release build process. But sadly that’s only a tag and no builds nor tests are getting created. Means something more is necessary. After some investigation I found out that Treeherder and its Rest API can be of help. Using the known tag and walking back the parents until Treeherder reports a successful build for the given platform, allowed me to retrieve the next possible revision to be used with mozdownload to retrieve the test_packages.json URL. I know its not perfect but satisfies us enough for now.

Then the release promotion project as worked on by the Release Engineering team was close to be activated. I heard a couple of days before, that Firefox 46.0b1 will be the first candidate to get it tested on. It gave me basically no time for testing at all. Thanks to all the support from Rail Aliiev I was able to get the new Mozilla Pulse listener created to handle appropriate release promotion build notifications. Given that with release promotion we create the candidates based on a signed off CI build we already have a valid revision to be used with mozdownload to retrieve the test_packages.json file – so no need for the above mentioned Treeherder traversal code. \o/ Once all has been implemented Firefox 46.0b3 was the first beta release for which we were able to process the release promotion notifications.

At the same time with release promotion news I also got informed by Robert Kaiser that the ondemand update jobs as performed with Mozmill do not work anymore. As turned out a change in the JS engine caused the bustage for Firefox 46.0b1. Given that Mozmill is dead I was not going to update it again. Instead I converted the ondemand update jobs to make use of Firefox-UI-Tests. This went pretty well, also because we were running those tests already for a while on mozilla-central and mozilla-aurora for nightly builds. As result we were able to run update jobs a day later for Firefox 46.0b1 and noticed that nearly all locales on Windows were busted, so only en-US got finally shipped. Not sure if that would have been that visible with Mozmill.

Last but not least I also removed the workaround which let all test jobs use the mozharness script from mozilla-central. It’s simply not necessary anymore given that all required features in mozharness are part of ESR45 now.

What’s next

I already have plans what’s next. But given that I will be away from work for a full month now, I will have to revisit those once I’m back in May. I promise that I will also blog about them around that time.

Survey about sharing information inside the Firefox Automation team

Within the Firefox Automation team we were suffering a bit in sharing information about our work over the last couple of months. That mainly happened because I was alone and not able to blog more often than once in a quarter. The same applies to our dev-automation mailing list which mostly only received emails from Travis CI with testing results.

Given that the team has been increased to 4 people now (beside me this is Maja Frydrychowicz, Syd Polk, and David Burns, we want to be more open again and also trying to get more people involved into our projects. To ensure that we do not make use of the wrong communication channels – depending where most of our readers are – I have setup a little survey. It will only take you a minute to go through but it will help us a lot to know more about the preferences of our automation geeks. So please take that little time and help us.

The survey can be found here and is open until end of November 2015:

https://www.surveymonkey.com/r/528WYYJ

Thank you a lot!

Firefox Automation report – Q1 2015

As you may have noticed I was not able to come up with status reports of the Firefox Automation team during the whole last quarter. I feel sad about it, but there was simply no time to keep up with those blog posts. Even now I’m not sure how often I will be able to blog. So maybe I will aim to do it at least once a quarter or if possible once a month.

You may ask how it comes? The answer is simple. Our team faced some changes and finally a massive loss of core members. Which means from the former 6 people only myself are remaining. Since end of February all 5 former team members from Softvision are no longer participating in any of the maintained projects. Thanks to all of them for the great help over all the last months and years! But every project we own is now on my own shoulders. And this is kinda hell of work with downsides like not being able to do as many reviews as I want for side projects. One positive thing at least was that I got pulled back into the A-Team at the same time. With that move I’m once more closer again to all the people who care about the basics of all test infrastructure at Mozilla. I feel back home.

So what have I done the whole last quarter… First, it was always the ongoing daily work for maintaining our Mozmill CI system. This was usually a job for a dedicated person all the last months. The amount of work can sometimes eat up a whole day. Especially if several regressions have been found or incompatible changes in Firefox have been landed. Seeing my deliverables for Q1 it was clear that we have to cut down the time to spent on those failures. As result we started to partially skip tests which were failing. There was no time to get any of those fixed. Happily the latest version of Mozmill is still working kinda nicely so no other work had to be dedicated for this project.

Most of my time during the last quarter I actually had to spent on Marionette, especially building up wrapper scripts for being able to use Marionette as test framework for Firefox Desktop. This was a kinda large change for us but totally important in terms of maintenance burden and sustainability. The code base of Mozmill is kinda outdated and features like Electrolysis (e10s) will totally break it. Given that a rewrite of the test framework is too cost-intensive the decision has been made to transition our Mozmill tests over to Marionette. Side-effect was that a lot of missing features had to be implemented in Marionette to bring it at a level as what Mozmill offers. Thanks for the amazing work goes to Andrew Halberstadt, David Burns, Jonathan Griffin, and especially Chris Manchester.

For the new UI driven tests for Firefox Desktop we created the firefox-ui-tests repository at Github. We decided on that name to make it clear to which product the tests belong to, and also to get rid of any relationship to the underling test framework name. This repository contains the harness extensions around Marionette, a separate puppeteer library for back-end and UI modules, and last but not least the tests themselves. As goal for Q1 we had to get the basics working including the full set of remote security tests, and most important the update tests. A lot of help on the security tests we got from Barbara Miller our intern from December to March. She did great amount of work here, and also assisted other community members in getting their code done. Finally we got all the security tests converted.

My own focus beside the harness pieces were the update tests. Given the complete refactoring of those Mozmill tests we were able to easily port them over to Marionette. We tried to keep the class structure as is, and only did enhancements where necessary. Here Bob Silverberg helped with two big chunks of work which I’m gladly thankful about! Thanks a lot! With all modules in-place I finally converted the update tests and got them running for each version of Firefox down to 38.0, which will be the next ESR release and kinda important to be tested with Marionette. For stability and ease of contribution we added support for Travis CI to our new repository. It helps us a lot with reviews of patches from community members, and they also can see immediately if changes they have done are working as expected.

The next big chunk of work will be to get those tests running in Mozmill CI (to be renamed) and the test reporting to use Treeherder. Also we want to get our update tests for Firefox releases executed by the RelEng system, to further reduce the amount of time for signoffs from QE. About this work I will talk more in my next blog post. So please stay tuned.

Meeting Details

If you are interested in further details and discussions you might also want to have a look at the meeting agendas, the video recordings, and notes from the Firefox Automation meetings. Please note that since end of February we no longer host a meeting due to the low attendance and other meetings like the A-team ones, where I have to report my status.

Firefox Automation report – week 51/52 2014

In this post you can find an overview about the work happened in the Firefox Automation team during week 51 and 52 of 2014. I’m sorry for this very late post but changes to our team, which I will get to in my next upcoming post, caught me up with lots of more work and didn’t give me the time for writing status reports.

Highlights

Henrik started work towards a Mozmill 2.1 release. Therefore he had to upgrade a couple of mozbase packages first to get latest Mozmill code on master working again. Once done the patch for handling parent sections in manifest files finally landed, which was originally written by Andrei Eftimie and was sitting around for a while. That addition allows us to use mozhttpd for serving test data via a local HTTP server. Last but not least another important feature went in, which let us better handle application disconnects. There are still some more bugs to fix before we can actually release version 2.1 of Mozmill.

Given that we only have the capacity to fix the most important issues for the Mozmill test framework, Henrik started to mass close existing bugs for Mozmill. So only a hand-full of bugs will remain open. If there is something important you want to see fixed, we would encourage you to start working on the appropriate bug.

For Mozmill CI we got the new Ubuntu 14.10 boxes up and running in our staging environment. Once we can be sure they are stable enough, they will also be enabled in production.

Individual Updates

For more granular updates of each individual team member please visit our weekly team etherpad for week 51 and week 52.

Meeting Details

If you are interested in further details and discussions you might also want to have a look at the meeting agenda, the video recording, and notes from the Firefox Automation meeting of week 51 and week 52.

Firefox Automation report – week 49/50 2014

In this post you can find an overview about the work happened in the Firefox Automation team during week 49 and 50.

Highlights

During the first week of December the all-hands work week happened in Portland. Those were some great and inspiring days, full of talks, discussions, and conversations about various things. Given that I do not see my colleagues that often in real life, I have taken this opportunity to talk to everyone who is partly or fully involved in projects of our automation team. There are various big goals in front of us, so clearing questions and finding the next steps to tackle ongoing problems was really important. Finally we came out with a long list of todo items and more clarity about so far unclear tasks.

In week 50 we got some updates landed for Mozmill CI. Given a regression from the blacklist landing, our l10n tests haven’t been executed for any locale of the Firefox Developer Edition. Since the fix landed, we have seen problems with access keys in nearly each locale for a new test, which covers the context menu of web content.

Also we would like to welcome Barbara Miller in our team. She joined us as an intern via the FOSS outreach program as driven by Gnome. She will be with us until March and will mainly work on testdaybot and the conversion of Mozmill tests to Marionette. The latter project is called m21s and details can be found on its project page. Soon I will post more details about it.

Individual Updates

For more granular updates of each individual team member please visit our weekly team etherpad for week 49 and week 50.

Meeting Details

If you are interested in further details and discussions you might also want to have a look at the meeting agenda, the video recording, and notes from the Firefox Automation meeting of week 48. Due to the Mozilla all-hands workweek there was no meeting in week 49.

Firefox Automation report – week 43/44 2014

In this post you can find an overview about the work happened in the Firefox Automation team during week 43 and 44.

Highlights

In preparation for the QA-wide demonstration of Mozmill-CI, Henrik reorganized our documentation to allow everyone a simple local setup of the tool. Along that we did the remaining deployment of latest code to our production instance.

Henrik also worked on the upgrade of Jenkins to latest LTS version 1.565.3, and we were able to push this upgrade to our staging instance for observation. Further he got the Pulse Guardian support implemented.

Mozmill 2.0.9 and Mozmill-Automation 2.0.9 have been released, and if you are curious what is included you want to check this post.

One of our major goals over the next 2 quarters is to replace Mozmill as test framework for our functional tests for Firefox with Marionette. Together with the A-Team Henrik got started on the initial work, which is currently covered in the firefox-greenlight-tests repository. More to come later…

Beside all that work we have to say good bye to one of our SoftVision team members.October the 29th was the last day for Daniel on the project. So thank’s for all your work!

Individual Updates

For more granular updates of each individual team member please visit our weekly team etherpad for week 43 and week 44.

Meeting Details

If you are interested in further details and discussions you might also want to have a look at the meeting agenda, the video recording, and notes from the Firefox Automation meetings of week 43 and week 44.

Firefox Automation report – week 41/42 2014

In this post you can find an overview about the work happened in the Firefox Automation team during week 41 and 42.

With the beginning of October we also have some minor changes in responsibilities of tasks. While our team members from SoftVision mainly care about any kind of Mozmill tests related requests and related CI failures, Henrik is doing all the rest including the framework and the maintenance of Mozmill CI.

Highlights

With the support for all locales testing in Mozmill-CI for any Firefox beta and final release, Andreea finished her blacklist patch. With that we can easily mark locales not to be tested, and get rid of the long white-list entries.

We spun up our first OS X 10.10 machine in our staging environment of Mozmill CI for testing the new OS version. We hit a couple of issues, especially some incompatibilities with mozrunner, which need to be fixed first before we can get started in running our tests on 10.10.

In the second week of October Teodor Druta joined the Softvision team, and he will assist all the others with working on Mozmill tests.

But we also had to fight a lot with Flash crashes on our testing machines. So we have seen about 23 crashes on Windows machines per day. And that all with the regular release version of Flash, which we re-installed because of a crash we have seen before was fixed. But the healthy period did resist long, and we had to revert back to the debug version without the protect mode. Lets see for how long we have to keep the debug version active.

Individual Updates

For more granular updates of each individual team member please visit our weekly team etherpad for week 41 and week 42.

Meeting Details

If you are interested in further details and discussions you might also want to have a look at the meeting agenda, the video recording, and notes from the Firefox Automation meetings of week 41 and week 42.

Firefox Automation report – week 39/40 2014

In this post you can find an overview about the work happened in the Firefox Automation team during week 39 and 40.

Highlights

One of our goals for last quarter was to get locale testing enabled in Mozmill-CI for each and every supported locale of Firefox beta and release builds. So Cosmin investigated the timing and other possible side-effects, which could happen when you test about 90 locales across all platforms! The biggest change we had to do was for the retention policy of logs from executed builds due to disk space issues. Here we not only delete the logs after a maximum amount of builds, but also after 3 full days now. That gives us enough time for investigation of test failures. Once that was done we were able to enable the remaining 60 locales. For details of all the changes necessary, you can have a look at the mozmill-ci pushlog.

During those two weeks Henrik spent his time on finalizing the Mozmill update tests to support the new signed builds on OS X. Once that was done he also released the new mozmill-automation 2.0.8.1 package.

Individual Updates

For more granular updates of each individual team member please visit our weekly team etherpad for week 39 and week 40.

Meeting Details

If you are interested in further details and discussions you might also want to have a look at the meeting agenda, the video recording, and notes from the Firefox Automation meetings of week 39 and week 40.

Firefox Automation report – week 37/38 2014

In this post you can find an overview about the work happened in the Firefox Automation team during week 37 and 38.

Highlights

After 7 months without a new release we finally were able to release mozdownload 1.12 with a couple of helpful enhancements and fixes.

We released Mozmill 2.0.7 and mozmill-automation 2.0.7 mainly for adding support of the v2 signed Firefox application bundles on OS X. Sadly we quickly had to follow-up with an appropriate 2.0.8 release for both tools, because a let change in the JS Engine caused a complete bustage of Mozmill. More details can be found in my appropriate blog post.

We were even able to finally release Memchaser 0.6, which is fixing a couple of outstanding bugs and brought in the first changes to fully support Australis.

One of our goals was to get the failure rate of Mozmill tests for release and beta candidate builds under 5%. To calculate that Cosmin wrote a little script, which pulls the test report data for a specific build from out dashboard and outputs the failure rate per executed testrun. We were totally happy to see that the failure rate for all Mozmill tests was around 0.027%!

During the merge process for the Firefox 32 release Andrei has seen some test inconsistencies between our named branches in the Mozmill-Tests repository. Some changes were never backported, and only present on the default branch for a very long time. He fixed that and also updated our documentation for branch merges

Something else worth for highlighting is also bug 1046645. Here our Mozmill tests found a case when Firefox does not correctly show the SSL status of a website if you navigate quickly enough. The fix for this regression caused by about:newtab made it even into the release notes

Last but not least Andreea started planning our Automation Training day for Q3. So she wrote a blog post about this event on QMO.

Individual Updates

For more granular updates of each individual team member please visit our weekly team etherpad for week 37 and week 38.

Meeting Details

If you are interested in further details and discussions you might also want to have a look at the meeting agenda, the video recording, and notes from the Firefox Automation meetings of week 37 and week 38.

Firefox Automation report – week 35/36 2014

In this post you can find an overview about the work happened in the Firefox Automation team during week 35 and 36.

Highlights

Due to a lot of Mozmill test failures related to add-on installation and search, we moved from the addons-dev.allizom.org website to the staging website located at addons.allizom.org. Since then we experiencing way lesser test failures, which are most likely network related.

In order to keep up with all test failures, and requests for new tests we started our Bug triage meeting on a weekly basis on Friday. For details we have created an etherpad.

If you are interested in helping us with Mozmill tests, you can now find a list of mentored and good first bugs on the bugsahoy web page.

Because of the app bundle changes on OS X, which were necessary due to the v2 signing requirements, we had to fix and enhance a couple of our automation tools. Henrik updated mozversion, mozmill, and mozmill-automation. We were close to releasing Mozmill 2.0.7.

Individual Updates

For more granular updates of each individual team member please visit our weekly team etherpad for week 35 and week 36.

Meeting Details

If you are interested in further details and discussions you might also want to have a look at the meeting agenda, the video recording, and notes from the Firefox Automation meetings of week 35 and week 36.