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Allow unused imports for cargo test

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Philipp Oppermann
2018-06-14 08:13:51 +02:00
parent 76ff956eb9
commit 2ed8d94c67
5 changed files with 9 additions and 11 deletions
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blog/content/second-edition/posts/04-unit-testing/index.md
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@@ -113,10 +113,10 @@ The test framework seems to work as intended. We don't have any tests yet, but w
We get a few warnings about unused items, because we no longer compile our `_start` function. To silence such unused code warnings, we can add the following to the top of our `main.rs`:
```
#![cfg_attr(test, allow(dead_code, unused_macros))]
#![cfg_attr(test, allow(dead_code, unused_macros, unused_imports))]
```
Like before, the `cfg_attr` attribute sets the passed attribute if the passed condition holds. Here, we set the `allow(…)` attribute when compiling in test mode. We use the `allow` attribute to disable warnings for the `dead_code` and `unused_macro` _lints_.
Like before, the `cfg_attr` attribute sets the passed attribute if the passed condition holds. Here, we set the `allow(…)` attribute when compiling in test mode. We use the `allow` attribute to disable warnings for the `dead_code`, `unused_macro`, and `unused_import` _lints_.
Lints are classes of warnings, for example `dead_code` for unused code or `missing-docs` for missing documentation. Lints can be set to four different states: