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Add detailed instructions for e2e testing
- rewrite parts of and improve README - simplify repo declaration - list coverage in workflow path filter
This commit is contained in:
Otto Richter
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3 changed files with 154 additions and 46 deletions
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@ -8,6 +8,9 @@ on:
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- .forgejo/workflows/e2e.yml
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- tests/e2e/**
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- web_src/js/**
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- web_src/css/form.css
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- templates/webhook/shared-settings.tmpl
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- templates/org/team/new.tmpl
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jobs:
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test-e2e:
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@ -1,42 +1,93 @@
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# End to end tests
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E2e tests largely follow the same syntax as [integration tests](../integration).
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Whereas integration tests are intended to mock and stress the back-end, server-side code, e2e tests the interface between front-end and back-end, as well as visual regressions with both assertions and visual comparisons.
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They can be run with make commands for the appropriate backends, namely:
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```shell
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make test-sqlite
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make test-pgsql
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make test-mysql
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```
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Thank you for your effort to provide good software tests for Forgejo.
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Please also read the general testing instructions in the
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[Forgejo contributor documentation](https://forgejo.org/docs/next/contributor/testing/)
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and make sure to also check the
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[Playwright documentation](https://playwright.dev/docs/intro)
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for further information.
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This file is meant to provide specific information for the integration tests
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as well as some tips and tricks you should know.
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Feel free to extend this file with more instructions if you feel like you have something to share!
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## How to run the tests?
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Before running any tests, please ensure you perform a clean frontend build:
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Make sure to perform a clean front-end build before running tests:
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```
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make clean frontend
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```
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## Install playwright system dependencies
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Whenever you modify frontend code (i.e. JavaScript and CSS files),
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you need to create a new frontend build.
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For tests that require interactive Git repos,
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you also need to ensure a Forgejo binary is ready to be used by Git hooks.
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For this, you additionally need to run
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~~~
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make TAGS="sqlite sqlite_unlock_notify" backend
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~~~
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### Install dependencies
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Browsertesting is performed by playwright.
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You need certain system libraries and playwright will download required browsers.
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Playwright takes care of this when you run:
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```
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npx playwright install-deps
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```
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## Interactive testing
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> **Note**
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> On some operating systems, the installation of missing libraries can complicate testing certain browsers.
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> It is often not necessary to test with all browsers locally.
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> Choosing either Firefox or Chromium is fine.
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You can make use of Playwright's integrated UI mode to run individual tests,
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get feedback and visually trace what your browser is doing.
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To do so, launch the debugserver using:
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### Run all tests
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If you want to run the full test suite, you can use
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```
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make test-e2e-sqlite
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```
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### Interactive testing
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We recommend that you use interactive testing for the development.
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After you performed the required builds,
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you should use one shell to start the debugserver (and leave it running):
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```
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make test-e2e-debugserver
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```
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Then launch the Playwright UI:
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It allows you to explore the test data in your local browser,
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and playwright to perform tests on it.
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> **Note**
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> The modifications persist while the debugserver is running.
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> If you modified things, it might be useful to restart it to get back to a fresh state.
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> While writing playwright tests, you either
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> need to ensure they are resilient against repeated runs
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> (e.g. when only creating new content),
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> or that they restore the initial state for the next browser run.
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#### With the playwright UI:
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Playwright ships with an integrated UI mode which allows you to
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run individual tests and to debug them by seeing detailed traces of what playwright does.
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Launch it with:
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```
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npx playwright test --ui
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```
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You can also run individual tests while the debugserver using:
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#### Running individual tests
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```
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npx playwright test actions.test.e2e.js:9
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@ -46,18 +97,29 @@ First, specify the complete test filename,
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and after the colon you can put the linenumber where the test is defined.
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## Run all tests via local act_runner
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#### With VSCodium or VSCode
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To debug a test, you can also use "Playwright Test" for
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[VScodium](https://open-vsx.org/extension/ms-playwright/playwright)
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or [VSCode](https://marketplace.visualstudio.com/items?itemName=ms-playwright.playwright).
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### Run all tests via local act_runner
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If you have a [forgejo runner](https://code.forgejo.org/forgejo/runner/),
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you can use it to run the test jobs:
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```
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act_runner exec -W ./.github/workflows/pull-e2e-tests.yml --event=pull_request --default-actions-url="https://github.com" -i catthehacker/ubuntu:runner-latest
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forgejo-runner exec -W .forgejo/workflows/e2e.yml --event=pull_request
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```
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## Run sqlite e2e tests
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Start tests
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```
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make test-e2e-sqlite
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```
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### Run e2e tests with another database
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This approach is not currently used,
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neither in the CI/CD nor by core contributors on their lcoal machines.
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It is still documented for the sake of completeness:
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You can also perform e2e tests using MariaDB/MySQL or PostgreSQL if you want.
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## Run MySQL e2e tests
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Setup a MySQL database inside docker
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```
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docker run -e "MYSQL_DATABASE=test" -e "MYSQL_ALLOW_EMPTY_PASSWORD=yes" -p 3306:3306 --rm --name mysql mysql:latest #(just ctrl-c to stop db and clean the container)
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@ -68,7 +130,6 @@ Start tests based on the database container
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TEST_MYSQL_HOST=localhost:3306 TEST_MYSQL_DBNAME=test TEST_MYSQL_USERNAME=root TEST_MYSQL_PASSWORD='' make test-e2e-mysql
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```
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## Run pgsql e2e tests
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Setup a pgsql database inside docker
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```
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docker run -e "POSTGRES_DB=test" -p 5432:5432 --rm --name pgsql postgres:latest #(just ctrl-c to stop db and clean the container)
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@ -78,11 +139,12 @@ Start tests based on the database container
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TEST_PGSQL_HOST=localhost:5432 TEST_PGSQL_DBNAME=test TEST_PGSQL_USERNAME=postgres TEST_PGSQL_PASSWORD=postgres make test-e2e-pgsql
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```
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## Running individual tests
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### Running individual tests
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Example command to run `example.test.e2e.js` test file:
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_Note: unlike integration tests, this filtering is at the file level, not function_
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> **Note**
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> Unlike integration tests, this filtering is at the file level, not function
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For SQLite:
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@ -90,13 +152,11 @@ For SQLite:
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make test-e2e-sqlite#example
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```
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For PostgreSQL databases(replace `mysql` to `pgsql`):
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### Visual testing
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```
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TEST_MYSQL_HOST=localhost:1433 TEST_MYSQL_DBNAME=test TEST_MYSQL_USERNAME=sa TEST_MYSQL_PASSWORD=MwantsaSecurePassword1 make test-e2e-mysql#example
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```
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## Visual testing
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> **Warning**
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> This is not currently used by most Forgejo contributors.
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> Your help to improve the situation and allow for visual testing is appreciated.
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Although the main goal of e2e is assertion testing, we have added a framework for visual regress testing. If you are working on front-end features, please use the following:
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- Check out `main`, `make clean frontend`, and run e2e tests with `VISUAL_TEST=1` to generate outputs. This will initially fail, as no screenshots exist. You can run the e2e tests again to assert it passes.
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@ -106,14 +166,55 @@ VISUAL_TEST=1 will create screenshots in tests/e2e/test-snapshots. The test will
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ACCEPT_VISUAL=1 will overwrite the snapshot images with new images.
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## With VSCodium or VSCode
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To debug a test, you can use "Playwright Test" for
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[VScodium](https://open-vsx.org/extension/ms-playwright/playwright)
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or [VSCode](https://marketplace.visualstudio.com/items?itemName=ms-playwright.playwright).
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Before doing that you will need to manually start a Forgejo instance and populate it
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with data from `models/fixtures` by running:
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## Tips and tricks
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```sh
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make TAGS='sqlite sqlite_unlock_notify' 'test-e2e-debugserver'
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```
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If you know noteworthy tests that can act as an inspiration for new tests,
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please add some details here.
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### Run tests very selectively
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Browser testing can take some time.
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If you want to iterate fast,
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save your time and only run very selected tests.
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Use only one browser.
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### Skip Safari if it doesn't work
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Many contributors have issues getting Safari (webkit)
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and especially Safari Mobile to work.
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At the top of your test function, you can use:
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~~~javascript
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test.skip(workerInfo.project.name === 'Mobile Safari', 'Unable to get tests working on Safari Mobile.');
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~~~
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### Don't forget the formatting.
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When writing tests without modifying other frontend code,
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it is easy to forget that the JavaScript test files also need formatting.
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Run `make lint-frontend-fix`.
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### Define new repos
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Take a look at `declare_repos_test.go` to see how to add your repositories.
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Feel free to improve the logic used there if you need more advanced functionality
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(it is a simplified version of the code used in the integration tests).
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### Accessibility testing
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If you can, perform automated accessibility testing using
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[AxeCore](https://github.com/dequelabs/axe-core-npm/blob/develop/packages/playwright/README.md).
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Take a look at `shared/forms.js` and some other places for inspiration.
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### List related files coverage
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If you think your playwright tests covers an important aspect of some template, CSS or backend files,
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consider adding the paths to `.forgejo/workflows/e2e.yml` in the path filter.
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It ensures that future modifications to this file will be tested as well.
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Currently, we do not run the e2e tests on all changes.
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@ -21,15 +21,19 @@ import (
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"github.com/stretchr/testify/require"
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)
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// first entry represents filename
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// the following entries define the full file content over time
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type FileChanges [][]string
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// put your Git repo declarations in here
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// feel free to amend the helper function below or use the raw variant directly
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func DeclareGitRepos(t *testing.T) func() {
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var cleanupFunctions []func()
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cleanupFunctions = append(cleanupFunctions, newRepo(t, 2, "diff-test", FileChanges{
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{"testfile", "hello", "hallo", "hola", "native", "ubuntu-latest", "- runs-on: ubuntu-latest", "- runs-on: debian-latest"},
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}))
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cleanupFunctions := []func(){
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newRepo(t, 2, "diff-test", FileChanges{
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{"testfile", "hello", "hallo", "hola", "native", "ubuntu-latest", "- runs-on: ubuntu-latest", "- runs-on: debian-latest"},
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}),
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// add your repo declarations here
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}
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return func() {
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for _, cleanup := range cleanupFunctions {
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