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TBR: remove the extra values which was overshadowing the test result #22483

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nturgut merged 3 commits into from
Nov 13, 2020
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TBR: remove the extra values which was overshadowing the test result #22483

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061d7bb
remove the extra values which was overshadowing the test result
Nov 13, 2020
8a1ac70
increase difference. canvaskit gives different results
Nov 13, 2020
8088ecb
increase difference more. firefox gave 1.7 diff. add comments
Nov 13, 2020
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4 changes: 3 additions & 1 deletion e2etests/web/regular_integration_tests/lib/screenshot_support.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -20,7 +20,9 @@ import 'package:image/image.dart';
/// this rate is set to 0.28), since during the end to end tests there are
/// more components on the screen which are not related to the functionality
/// under test ex: a blinking cursor.
const double kMaxDiffRateFailure = 0.5 / 100; // 0.5%
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@ferhatb ferhatb Nov 13, 2020

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can we limit this to canvaskit only ?

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@nturgut nturgut Nov 13, 2020

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thanks. I'll also discuss this as an option, tomorrow with @yjbanov. As we discussed offline the options we have:

  • increasing the diff
  • applying different diff for canvaskit
  • merging different screenshot files for canvaskit
  • (long term, after migration) uploading with different parameters to gold.

Since tests are returning unreliable results now, I'd like to keep this till tomorrow.

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@yjbanov yjbanov Nov 13, 2020

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My guess is, because the tests have been silently failing, as we were upgrading CanvasKit to new versions and weren't updating the screenshots, they slowly deviated from the goldens. Updating the screenshots might do the trick.

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@flar flar Nov 13, 2020

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Could un-updated goldens be causing this LWE build failure?

https://ci.chromium.org/p/flutter/builders/try/Linux%20Web%20Engine/11833?

https://logs.chromium.org/logs/flutter/buildbucket/cr-buildbucket.appspot.com/8863763201792734000/+/steps/felt_test_chrome/0/stdout

// TODO(nurhan): canvaskit tests results have around 1.5 mismatch.
// Investigate possible solutions.
const double kMaxDiffRateFailure = 1.8 / 100; // 0.5%

/// SBrowser screen dimensions for the Flutter Driver test.
const int _kScreenshotWidth = 1024;
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9 changes: 3 additions & 6 deletions lib/web_ui/dev/integration_tests_manager.dart
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Expand Up @@ -164,9 +164,6 @@ class IntegrationTestsManager {
e2eTestsToRun.add(basename);
}

int numberOfPassedTests = 0;
int numberOfFailedTests = 0;

final Set<String> buildModes = _getBuildModes();

for (String fileName in e2eTestsToRun) {
Expand All @@ -175,9 +172,9 @@ class IntegrationTestsManager {

final int numberOfTestsRun = _numberOfPassedTests + _numberOfFailedTests;

print('INFO: ${numberOfTestsRun} tests run. ${numberOfPassedTests} passed '
'and ${numberOfFailedTests} failed.');
return numberOfFailedTests == 0;
print('INFO: ${numberOfTestsRun} tests run. ${_numberOfPassedTests} passed '
'and ${_numberOfFailedTests} failed.');
return _numberOfFailedTests == 0;
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@yjbanov yjbanov Nov 13, 2020

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This LGTM as an emergency fix, but we also need a test that fails intentionally to verify that when we need to fail we do. We can borrow ideas from other tools that have failure tests:

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@nturgut nturgut Nov 13, 2020

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Great, thanks! I was also thinking about it yesterday. I think that's a very important test case to have.

}

Future<void> _runTestsTarget(
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