rust-lang / rust-lang/rust

compiletest: improve diagnostics for test suite default outcome expectation

Open
#133,816 0 comments 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

A-compiletest A-diagnostics C-enhancement T-bootstrap T-compiler
Dominant language
Rust
Stars
119k
Forks
16.1k
PR merge metrics
PR metrics pending

Description

Remark (for myself): improve this diagnostics when I get to untangling the runtest logic to make it so that test suites explicitly declare their intended default behavior so that the diagnostics here can say e.g. "expected to check-fail, but this didn't fail" or whatever.

Originally posted by @jieyouxu in https://github.com/rust-lang/rust/pull/133813#discussion_r1868302243

E.g. ui tests by default are expected to "check-fail", compare that to the actual test outcome, etc.

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by tracing compiletest's runtest logic and how ui tests determine their default outcome. Compare the declared or inferred expectation with the actual test result, then make the diagnostics identify both, such as an expected check-fail that did not fail; done means the message explains the mismatch clearly.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
testing-qa
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.