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Add more detailed contribution instructions for tests

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Louis Dureuil 2023-01-30 17:39:05 +01:00
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CONTRIBUTING.md
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@ -52,6 +52,23 @@ cargo test
This command will be triggered to each PR as a requirement for merging it.
#### Snapshot-based tests
We are using [insta](https://insta.rs) to perform snapshot-based testing.
We recommend using the insta tooling (such as `cargo-insta`) to update the snapshots if they change following a PR.
New tests should use insta where possible rather than manual `assert` statements.
Furthermore, we provide some macros on top of insta, notably a way to use snapshot hashes instead of inline snapshots, saving a lot of space in the repository.
To effectively debug snapshot-based hashes, we recommend you export the `MEILI_TEST_FULL_SNAPS` environment variable so that snapshot are fully created locally:
```
export MEILI_TEST_FULL_SNAPS=true # add this to your .bashrc, .zshrc, ...
```
#### Test troubleshooting
If you get a "Too many open files" error you might want to increase the open file limit using this command:
```bash