Files
rust/tests/ui
bors 5986ff05d8 Auto merge of #137248 - matthiaskrgr:rollup-s18zjau, r=matthiaskrgr
Rollup of 9 pull requests

Successful merges:

 - #136936 (Use 'yes' instead of 'while-echo' in tests/ui/process/process-sigpipe.rs except 'nto')
 - #137026 (Stabilize (and const-stabilize) `integer_sign_cast`)
 - #137059 (fix: Alloc new errorcode E0803 for E0495)
 - #137177 (Update `minifier-rs` version to `0.3.5`)
 - #137210 (compiler: Stop reexporting stuff in cg_llvm::abi)
 - #137213 (Remove `rustc_middle::mir::tcx` module.)
 - #137216 (eval_outlives: bail out early if both regions are in the same SCC)
 - #137228 (Fix typo in hidden internal docs of `TrustedRandomAccess`)
 - #137242 (Add reference annotations for the `do_not_recommend` attribute)

r? `@ghost`
`@rustbot` modify labels: rollup
2025-02-19 04:37:26 +00:00
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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>.