Files
rust/tests/ui
bors 90384941aa Auto merge of #138302 - matthiaskrgr:rollup-an2up80, r=matthiaskrgr
Rollup of 8 pull requests

Successful merges:

 - #136395 (Update to rand 0.9.0)
 - #137279 (Make some invalid codegen attr errors structured/translatable)
 - #137585 (Update documentation to consistently use 'm' in atomic synchronization example)
 - #137926 (Add a test for `-znostart-stop-gc` usage with LLD)
 - #138074 (Support `File::seek` for Hermit)
 - #138238 (Fix dyn -> param suggestion in struct ICEs)
 - #138270 (chore: Fix some comments)
 - #138286 (triagebot.toml: Don't label `test/rustdoc-json` as A-rustdoc-search (…)

r? `@ghost`
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UI Tests

This folder contains rustc's UI tests.

Test Directives (Headers)

Typically, a UI test will have some test directives / headers which are special comments that tell compiletest how to build and interpret a test.

As part of an ongoing effort to rewrite compiletest (see https://github.com/rust-lang/compiler-team/issues/536), a major change proposal to change legacy compiletest-style headers // <directive> to ui_test-style headers //@ <directive> was accepted (see https://github.com/rust-lang/compiler-team/issues/512.

An example directive is ignore-test. In legacy compiletest style, the header would be written as

// ignore-test

but in ui_test style, the header would be written as

//@ ignore-test

compiletest is changed to accept only //@ directives for UI tests (currently), and will reject and report an error if it encounters any comments // <content> that may be parsed as a legacy compiletest-style test header. To fix this, you should migrate to the ui_test-style header //@ <content>.