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docs(e2e): Update e2e test instructions for changed file patterns

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chore: let fnetx review e2e tests
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Otto Richter 2024-10-03 20:29:36 +02:00
parent 72749bcf70
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@ -16,6 +16,9 @@ templates/.* @caesar @crystal @gusted
## the issue sidebar was touched by fnetx
templates/repo/issue/view_content/sidebar.* @fnetx
# Playwright tests
tests/e2e/.* @fnetx
# Files related to Go development.
# The modules usually don't require much knowledge about Forgejo and could

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tests/e2e/README.md
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@ -110,9 +110,13 @@ If you have a [forgejo runner](https://code.forgejo.org/forgejo/runner/),
you can use it to run the test jobs:
```
forgejo-runner exec -W .forgejo/workflows/e2e.yml --event=pull_request
forgejo-runner exec -W .forgejo/workflows/testing.yml -j test-e2e
```
Note that the CI workflow has some logic to run tests based on changed files only.
This might conflict with your local setup and not run all the desired tests
because it might only look at file changes in your latest commit.
### Run e2e tests with another database
This approach is not currently used,
@ -212,9 +216,52 @@ Take a look at `shared/forms.js` and some other places for inspiration.
### List related files coverage
If you think your playwright tests covers an important aspect of some template, CSS or backend files,
consider adding the paths to `.forgejo/workflows/e2e.yml` in the path filter.
To speed up the CI pipelines and avoid running expensive tests too often,
only a selection of tests is run by default,
based on the changed files.
It ensures that future modifications to this file will be tested as well.
At the top of each playwright test file,
list the files or file patterns that are covered by your test.
Often, these are files that you modified for your feature or bugfix,
or that you looked at (and might still have open in your IDE),
because your fix depends on their behaviour.
Currently, we do not run the e2e tests on all changes.
#### Which files to watch?
The set of files your test "watches" depends on the kind of test you write.
If you only test for the presence of an element and do no accessibility or placement checks,
you won't detect broken visual appearance and there is little reason to watch CSS files.
However, if your test also checks that an element is correctly positioned
(e.g. that it does not overflow the page),
or has accessibiltiy properties (includes colour contrast),
also list stylesheets that define the behaviour your test depends on.
Watching the place that generate the selectors you use
(typically templates, but can also be JavaScript)
is a must, to ensure that someone modifying the markup notices that your selectors fail
(e.g. because an id or class was renamed).
If you are unsure about the exact set of files,
feel free to ask other contributors.
#### How to specify the patterns?
You put filenames and patterns as blocks between two `// @watch` comments.
An example that watches changes on (in order)
a single file,
a full recursive subfolder,
two files with a shorthand pattern,
and a set of files with a certain ending:
~~~
// @watch start
// templates/webhook/shared-settings.tmpl
// templates/repo/settings/**
// web_src/css/{form,repo}.css
// web_src/css/modules/*.css
// @watch end
~~~
The patterns are evaluated on a "first-match" basis.
Under the hood, [gobwas/glob](https://github.com/gobwas/glob) is used.