mirror of https://github.com/rust-lang/rust
36 lines
1.1 KiB
Markdown
36 lines
1.1 KiB
Markdown
# UI Tests
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This folder contains `rustc`'s
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[UI tests](https://rustc-dev-guide.rust-lang.org/tests/ui.html).
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## Test Directives (Headers)
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Typically, a UI test will have some test directives / headers which are
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special comments that tell compiletest how to build and intepret a test.
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As part of an on-going effort to rewrite compiletest
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(see <https://github.com/rust-lang/compiler-team/issues/536>), a major
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change proposal to change legacy compiletest-style headers `// <directive>`
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to [`ui_test`](https://github.com/oli-obk/ui_test)-style headers
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`//@ <directive>` was accepted (see
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<https://github.com/rust-lang/compiler-team/issues/512>.
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An example directive is `ignore-test`. In legacy compiletest style, the header
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would be written as
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```rs
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// ignore-test
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```
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but in `ui_test` style, the header would be written as
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```rs
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//@ ignore-test
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```
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compiletest is changed to accept only `//@` directives for UI tests
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(currently), and will reject and report an error if it encounters any
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comments `// <content>` that may be parsed as an legacy compiletest-style
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test header. To fix this, you should migrate to the `ui_test`-style header
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`//@ <content>`.
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