contributing.md: link to testing docs 📝

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Jannis R 2023-12-07 00:54:56 +01:00
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## Adding integration/end-to-end tests ## Adding integration/end-to-end tests
The [end-to-end/system tests](https://en.wikipedia.org/wiki/System_testing) in [`test/e2e`](test/e2e), executing via `npm run test-e2e`, are querying real HAFAS endpoints, expecting valid & *reasonable* responses. Refer to the [testing docs](docs/tests.md).
The [integration tests](https://en.wikipedia.org/wiki/Integration_testing) (`npm run test-integration`) are the same `test/e2e` tests, running against *mocked* HAFAS responses from [`test/e2e/fixtures`](test/e2e/fixtures).
1. Add a new end-to-end test that tests your feature/bugfix.
2. Make sure the test passes. You can run your test exclusively using `test.only`.
3. Record the HAFAS responses as [fixtures](https://en.wikipedia.org/wiki/Test_fixture) using `npm run test-integration:record`.
4. Make sure the passes against *only* mocked responses using `npm run test-integration`.