[NoQA] Add sleep cooldowns to e2e tests by ospfranco · Pull Request #30635 · Expensify/App

ospfranco · 2023-10-31T14:47:46Z

Details

We are still seeing potentially flaky results on the e2e tests. Our tests on a local device, have shown there is a lot of variance due to thermal throttling. We also discovered that killing the app and immediately starting it again would cause a warm boot instead of a cold boot, which seems to skew the numbers and add a greater variance to the results.

Before doing another major refactoring of the tests, we decided to give sleep cooldowns a try.

a) Add a large cooldown period at the beginning of each test suite, such as limiting the variance of heat build-up from our own runs but at the same time from any previous run on the device in the device farm.

b) A smaller cooldown between tests should help the phone clear caches and do a cold boot, thus eliminating caching variance and limiting the effects of thermal throttling.

In our tests, these cooldowns cut down the standard deviation of the tests in half. So we expect to see flakiness on the production system also go down. As a side note, the reported TTI/bundle load time also went up, but this is an artifact of previously measuring warm boots, instead of cold boots.

Fixed Issues

$
PROPOSAL:

Tests

Verify that no errors appear in the JS console

Offline tests

QA Steps

Verify that no errors appear in the JS console

PR Author Checklist

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Android: Native

Android: mWeb Chrome

iOS: Native

iOS: mWeb Safari

MacOS: Chrome / Safari

MacOS: Desktop

melvin-bot · 2023-10-31T14:48:24Z

@aldo-expensify Please copy/paste the Reviewer Checklist from here into a new comment on this PR and complete it. If you have the K2 extension, you can simply click: [this button]

ospfranco · 2023-10-31T14:53:46Z

tests/e2e/testRunner.js

+        const coolDownLogs = Logger.progressInfo(`Cooling down for ${config.COOL_DOWN / 1000}s`);
+        coolDownLogs.updateText(`Cooling down for ${config.COOL_DOWN / 1000}s`);
+
+        await sleep(config.BOOT_COOL_DOWN);


Having the cooldown right at the beginning should hopefully lower the chances of heat throttling from the previous run (which we have no control over and will be a completely different AWS DF customer/app). It also gives the time to cool down between test suites.

ospfranco · 2023-10-31T14:54:27Z

tests/e2e/testRunner.js

+            await killApp('android', config.APP_PACKAGE);
+
+            testLog.updateText(`Coolin down phone 🧊 ${config.SUITE_COOL_DOWN / 1000}s\n`);
+            await sleep(config.SUITE_COOL_DOWN);


Adding the cool down between booting the app again, had the side-effect of actually causing a cold boot, which increased TTI/bundle load JS times significantly but also stabilized standard deviation.

tests/e2e/testRunner.js

Co-authored-by: Aldo Canepa Garay <87341702+aldo-expensify@users.noreply.github.com>

mountiny

Coming from here this seems to have helped so going to merge this

mountiny · 2023-11-01T10:39:39Z

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Android: Native

Android: mWeb Chrome

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OSBotify · 2023-11-01T10:46:34Z

✋ This PR was not deployed to staging yet because QA is ongoing. It will be automatically deployed to staging after the next production release.

OSBotify · 2023-11-02T10:38:17Z

🚀 Deployed to staging by https://github.com/mountiny in version: 1.3.95-0 🚀

platform	result
🤖 android 🤖	success ✅
🖥 desktop 🖥	success ✅
🍎 iOS 🍎	success ✅
🕸 web 🕸	success ✅

OSBotify · 2023-11-06T22:08:20Z

🚀 Deployed to production by https://github.com/puneetlath in version: 1.3.95-9 🚀

platform	result
🤖 android 🤖	success ✅
🖥 desktop 🖥	success ✅
🍎 iOS 🍎	success ✅
🕸 web 🕸	success ✅

OSBotify · 2023-11-06T22:35:40Z

🚀 Deployed to staging by https://github.com/mountiny in version: 1.3.96-0 🚀

platform	result
🤖 android 🤖	success ✅
🖥 desktop 🖥	success ✅
🍎 iOS 🍎	success ✅
🕸 web 🕸	success ✅

OSBotify · 2023-11-09T22:53:13Z

🚀 Deployed to production by https://github.com/puneetlath in version: 1.3.96-15 🚀

platform	result
🤖 android 🤖	failure ❌
🖥 desktop 🖥	success ✅
🍎 iOS 🍎	success ✅
🕸 web 🕸	success ✅

ospfranco added 4 commits October 31, 2023 13:14

Move sleep to beginning of each test

071bacb

Add cooldown between tests

0682682

Allow sleep between runs

f8acc3c

Modify runs and cooldowns

5da00d1

ospfranco requested a review from a team as a code owner October 31, 2023 14:47

melvin-bot bot requested review from aldo-expensify and removed request for a team October 31, 2023 14:48

Remove ESLINT comment

9a8800d

ospfranco commented Oct 31, 2023

View reviewed changes

ospfranco added 2 commits October 31, 2023 15:54

Remove modified package script

0bf5289

Add code comments

2af3d61

AndrewGable self-requested a review October 31, 2023 15:05

Increate timeout to AWS DF action

c6adba2

aldo-expensify reviewed Oct 31, 2023

View reviewed changes

tests/e2e/testRunner.js Outdated Show resolved Hide resolved

Update tests/e2e/testRunner.js

4a2e3eb

Co-authored-by: Aldo Canepa Garay <87341702+aldo-expensify@users.noreply.github.com>

mountiny changed the title ~~Add sleep cooldowns to e2e tests~~ [NoQ] Add sleep cooldowns to e2e tests Nov 1, 2023

mountiny changed the title ~~[NoQ] Add sleep cooldowns to e2e tests~~ [NoQA] Add sleep cooldowns to e2e tests Nov 1, 2023

mountiny approved these changes Nov 1, 2023

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mountiny merged commit a6b0b54 into Expensify:main Nov 1, 2023

OSBotify mentioned this pull request Nov 2, 2023

Deploy Checklist: New Expensify 2023-11-02 #30752

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OSBotify mentioned this pull request Nov 6, 2023

Deploy Checklist: New Expensify 2023-11-06 #30929

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[NoQA] Add sleep cooldowns to e2e tests#30635

[NoQA] Add sleep cooldowns to e2e tests#30635
mountiny merged 9 commits intoExpensify:mainfrom
margelo:osp/e2e-improvements

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