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Jun 17, 2021
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Document how to run unit tests #1141

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14 changes: 14 additions & 0 deletions src/tests/running.md
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Expand Up @@ -92,6 +92,20 @@ tests for components you did not change at all.
build; therefore, while the tests **usually** work fine with stage 1,
there are some limitations.

## Run unit tests on the compiler/library

You may want to run unit tests on a specific file with following:

```bash
./x.py test compiler/rustc_data_structures/src/thin_vec/tests.rs
```

But unfortunately, it's impossible. You should invoke following instead:
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@JohnTitor JohnTitor Jun 11, 2021 •
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Searched the issue tracker a bit but I couldn't find any issues related to this, should we open a new issue and add a link here?


```bash
./x.py test compiler/rustc_data_structures/ --test-args thin_vec
```

## Running an individual test

Another common thing that people want to do is to run an **individual
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