tests/screentest: retry on small diffs

If a screentest case fails but the number of differing pixels is
small, retry the the test.

This can increase reliability when a test fails but the diffs are
tiny--20 pixels or fewer. We don't know why this happens, but it
does happen occasionally.

Note that no test passes unless every pixel matches. This change
merely retries tests that are close. We've found that to help.
(After three retries, the test will fail.)

Change-Id: Ib48858197c6206cd1ea6a850c58c1335e031347e
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/633200
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
kokoro-CI: kokoro <noreply+kokoro@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
1 file changed
tree: 56e981360bc157fbf281bf56f487402a8ecf5c75
  1. .github/
  2. cmd/
  3. deploy/
  4. devtools/
  5. doc/
  6. internal/
  7. migrations/
  8. static/
  9. tests/
  10. third_party/
  11. .dockerignore
  12. .eslintignore
  13. .eslintrc.yaml
  14. .gitignore
  15. .prettierignore
  16. .prettierrc.yaml
  17. .stylelintignore
  18. .stylelintrc.yaml
  19. all.bash
  20. CONTRIBUTING.md
  21. go.mod
  22. go.sum
  23. jest.config.js
  24. LICENSE
  25. package-lock.json
  26. package.json
  27. PATENTS
  28. README.md
  29. tsconfig.json
README.md

golang.org/x/pkgsite

This repository hosts the source code of the pkg.go.dev website, and pkgsite, a documentation server program.

Go Reference

pkg.go.dev: a site for discovering Go packages

Pkg.go.dev is a website for discovering and evaluating Go packages and modules.

You can check it out at https://pkg.go.dev.

pkgsite: a documentation server

pkgsite program extracts and generates documentation for Go projects.

Example usage:

$ go install golang.org/x/pkgsite/cmd/pkgsite@latest
$ cd myproject
$ pkgsite -open .

For more information, see the pkgsite documentation.

Requirements

Pkgsite requires Go 1.19 to run. The last commit that works with Go 1.18 is 9ffe8b928e4fbd3ff7dcf984254629a47f8b6e63. The last commit that works with Go 1.17 is 4d836c6a652cde92f433967680dfd6171a91ec12.

Issues

If you want to report a bug or have a feature suggestion, please first check the known issues to see if your issue is already being discussed. If an issue does not already exist, feel free to file an issue.

For answers to frequently asked questions, see pkg.go.dev/about.

You can also chat with us on the #pkgsite Slack channel on the Gophers Slack.

Contributing

We would love your help!

Our canonical Git repository is located at go.googlesource.com/pkgsite. There is a mirror of the repository at github.com/golang/pkgsite.

To contribute, please read our contributing guide.

License

Unless otherwise noted, the Go source files are distributed under the BSD-style license found in the LICENSE file.

Links