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CONTRIBUTING: add manual testing section

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Joonas Koivunen 2017-08-24 18:17:35 +03:00
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CONTRIBUTING.md
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@ -73,6 +73,19 @@ Of course there's little sense in writing the output yourself or copying it arou
Therefore you can simply run `tests/ui/update-all-references.sh` and check whether
the output looks as you expect with `git diff`. Commit all `*.stderr` files, too.
### Testing manually
Manually testing against an example file is useful if you have added some
`println!`s and test suite output becomes unreadable. To try clippy with your
local modifications, run `cargo run -- -L ./target/debug input.rs` from the
working copy root. Your test file, here `input.rs`, needs to have clippy
enabled as a plugin:
```rust
#![feature(plugin)]
#![plugin(clippy)]
```
## Contributions
Clippy welcomes contributions from everyone.