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Add Windows-specific comments to testing guide #28022

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Aug 28, 2015
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Add Windows-specific comments to testing guide #28022

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15 changes: 14 additions & 1 deletion src/doc/trpl/testing.md
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Expand Up @@ -120,13 +120,26 @@ And that's reflected in the summary line:
test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured
```

We also get a non-zero status code:
We also get a non-zero status code. We can use `$?` on OS X and Linux:

```bash
$ echo $?
101
```

On Windows, if you’re using `cmd`:

```bash
> echo %ERRORLEVEL%
```

And if you’re using PowerShell:

```bash
> echo $LASTEXITCODE # the code itself
> echo $? # a boolean, fail or succeed
```

This is useful if you want to integrate `cargo test` into other tooling.

We can invert our test's failure with another attribute: `should_panic`:
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