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Update docs about ui tests now using //@ headers #1885

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merged 2 commits into from
Feb 16, 2024
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@oli-obk oli-obk commented Feb 12, 2024

corresponding rustc PR: rust-lang/rust#120881

src/tests/ui.md Outdated Show resolved Hide resolved
bors added a commit to rust-lang-ci/rust that referenced this pull request Feb 16, 2024
… r=oli-obk

Migrate ui tests from legacy compiletest-style directives `//` to `ui_test`-style directives `//@`

## Preface

There's an on-going effort to rewrite parts of or the entirety of compiletest
(<rust-lang/compiler-team#536>). A step towards this involve migrating
ui tests to use the [`ui_test`](https://github.com/oli-obk/ui_test) framework, which involves
changing compiletest directives in `// <directive-name>` style to `ui_test` `//@ <directive-name>`
style (rust-lang/compiler-team#512).

This PR aims to implement the directive-style change from `//` to `//`@`` for ui tests only and
make compiletest only accept `//`@`` directives in ui test mode (only).

## Key Changes

1. All ui test `//` directives are replaced by `//`@`` directives.
2. Only accept `//`@`` directives for ui tests (specifically ui tests).
3. Errors if a comment could be interpreted as a legacy-style `//` directive.

## Diff Generation

The diff is generated by:

- Collecting directives from ui tests via hacking on compiletest.
- Using a migration tool to replace `//` directives in ui tests with `//`@`.`

### Reproduction Steps

0. Delete the temporary directory `$RUSTC_REPO_PATH/build/x86_64-apple-darwin/test/ui/__directive_lines` and the temporary file `$RUSTC_REPO_PATH/build/x86_64-apple-darwin/test/ui/__directive_lines.txt` (if you ran the collection script before).
1. Use the <https://github.com/jieyouxu/rust/tree/collect-test-directives> collect-test-directives
   script, which outputs temporary files recording headers occuring in each ui test.
   - You need to checkout this branch: `git checkout collect-test-directives`.
   - You might need to rebase on lastest master and ensure there are no conflicts.
   - You likely need to run `./x test tests/ui --stage 1 --force-rerun` to generate the temporary
     files consistently.
2. Checkout the `migrate-ui-test-directives` branch.
4. Run the migration tool <https://github.com/jieyouxu/compiletest-ui_test-header-migration>.
    - You will need to first generate a `migration_config.toml` via `cargo run -- generate-config` under `$CWD`.
    - Then, update `manual_directives = ["// should-fail"]` in `migration_config.toml`. This is required because the collection script doesn't deal with some special meta ui tests and there are no other `// should-fail` occurrences.
5. Check that the migration at least does not cause UI test failures if you change compiletest to
   accept `//`@`` directives for ui tests only.
   - `RUSTC_TEST_FAIL_FAST=1 ./x test tests/ui --stage 1 --bless`
6. Confirm that there is no difference after running the migration tool when you are on the
   `migrate-ui-test-directives` branch.

## Next Steps

- [x] ~~Need to implement some kind of warning or tidy script to help contributors catch old-style
  `// <directive-name>` directives, while only accepting `ui_test`-style `//@ <directive-name>`
  directives.~~ An error is emitted if a comment that could be interpreted as legacy-style test directive is encountered.
- [ ] Need to properly document this change in e.g. rustc-dev-guide (rust-lang/rustc-dev-guide#1885).
    - [x] Add a `README.md` to `tests/ui` describing the directive style change.
bors added a commit to rust-lang-ci/rust that referenced this pull request Feb 16, 2024
… r=oli-obk

Migrate ui tests from legacy compiletest-style directives `//` to `ui_test`-style directives `//@`

## Preface

There's an on-going effort to rewrite parts of or the entirety of compiletest
(<rust-lang/compiler-team#536>). A step towards this involve migrating
ui tests to use the [`ui_test`](https://github.com/oli-obk/ui_test) framework, which involves
changing compiletest directives in `// <directive-name>` style to `ui_test` `//@ <directive-name>`
style (rust-lang/compiler-team#512).

This PR aims to implement the directive-style change from `//` to `//`@`` for ui tests only and
make compiletest only accept `//`@`` directives in the "ui" test suite (only).

## Key Changes

1. All ui test `//` directives are replaced by `//`@`` directives.
2. Only accept `//`@`` directives for "ui" test suite.
3. Errors if a comment could be interpreted as a legacy-style `//` directive.

## Diff Generation

The diff is generated by:

- Collecting directives from ui tests via hacking on compiletest.
- Using a migration tool to replace `//` directives in ui tests with `//`@`.`

### Reproduction Steps

0. Delete the temporary directory `$RUSTC_REPO_PATH/build/x86_64-apple-darwin/test/ui/__directive_lines` and the temporary file `$RUSTC_REPO_PATH/build/x86_64-apple-darwin/test/ui/__directive_lines.txt` (if you ran the collection script before).
1. Use the <https://github.com/jieyouxu/rust/tree/collect-test-directives> collect-test-directives
   script, which outputs temporary files recording headers occuring in each ui test.
   - You need to checkout this branch: `git checkout collect-test-directives`.
   - You might need to rebase on lastest master and ensure there are no conflicts.
   - You likely need to run `./x test tests/ui --stage 1 --force-rerun` to generate the temporary
     files consistently.
2. Checkout the `migrate-ui-test-directives` branch.
4. Run the migration tool <https://github.com/jieyouxu/compiletest-ui_test-header-migration>.
    - You will need to first generate a `migration_config.toml` via `cargo run -- generate-config` under `$CWD`.
    - Then, update `manual_directives = ["// should-fail"]` in `migration_config.toml`. This is required because the collection script doesn't deal with some special meta ui tests and there are no other `// should-fail` occurrences.
5. Check that the migration at least does not cause UI test failures if you change compiletest to
   accept `//`@`` directives for ui tests only.
   - `RUSTC_TEST_FAIL_FAST=1 ./x test tests/ui --stage 1 --bless`
6. Confirm that there is no difference after running the migration tool when you are on the
   `migrate-ui-test-directives` branch.

## Next Steps

- [x] ~~Need to implement some kind of warning or tidy script to help contributors catch old-style
  `// <directive-name>` directives, while only accepting `ui_test`-style `//@ <directive-name>`
  directives.~~ An error is emitted if a comment that could be interpreted as legacy-style test directive is encountered.
- [ ] Need to properly document this change in e.g. rustc-dev-guide (rust-lang/rustc-dev-guide#1885).
    - [x] Add a `README.md` to `tests/ui` describing the directive style change.
Co-authored-by: Tshepang Mbambo <[email protected]>
@compiler-errors compiler-errors merged commit 2c01b49 into master Feb 16, 2024
1 check passed
Comment on lines +11 to +12
Some test suites use `//@` to signal that a comment is a header, but most are still
just using plain comments.
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There's an additional caveat:

// ignore-tidy and // ignore-tidy-* are specifically ignored by compiletest in "ui" test suite specifically.

@WaffleLapkin WaffleLapkin deleted the ui_test branch February 16, 2024 23:15
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request Feb 26, 2024
Update books

## rust-lang/book

1 commits in 71352deb20727b4dda9ebfe8182709d5bf17dfea..19c40bfd2d57641d962f3119a1c343355f1b3c5e
2024-02-19 20:39:35 UTC to 2024-02-19 20:39:35 UTC

- Rust upgrades (rust-lang/book#3844)

## rust-lang/edition-guide

3 commits in 76bd48a273a0e0413a3bf22c699112d41497b99e..e1eead1181a691e56299294d5f1d62fe7a26d317
2024-02-24 21:15:28 UTC to 2024-02-17 21:44:36 UTC

- Rename static_mut_refs (rust-lang/edition-guide#293)
- Add 2024 prelude (rust-lang/edition-guide#292)
- Add some more initial stub docs for 2024. (rust-lang/edition-guide#291)

## rust-lang/reference

5 commits in 8227666de13f6e7bb32dea9dc42e841adb5ce4b7..3417f866932cb1c09c6be0f31d2a02ee01b4b95d
2024-02-25 19:37:14 UTC to 2024-02-15 13:28:59 UTC

- Document `target_abi` (rust-lang/reference#1446)
- Add `rust-toolchain.toml` and revise README (rust-lang/reference#1474)
- Clarify semantics of the various pointer to pointer casts (rust-lang/reference#1451)
- Update aarch64 target feature docs to match LLVM (rust-lang/reference#1470)
- Fix grammar for TypePathFn (rust-lang/reference#1281)

## rust-lang/rust-by-example

4 commits in e188d5d466f7f3ff9f1d518393235f4fe951be46..57f1e708f5d5850562bc385aaf610e6af14d6ec8
2024-02-24 18:31:19 UTC to 2024-02-14 13:06:53 UTC

- bug: fix typo (rust-lang/rust-by-example#1822)
- Fix typo in attribute.md (rust-lang/rust-by-example#1818)
- Add Japanese translation (rust-lang/rust-by-example#1794)
- Remove unused .travis.yml file (rust-lang/rust-by-example#1816)

## rust-lang/rustc-dev-guide

9 commits in 1f30cc7..7b0ef5b
2024-02-22 19:15:52 UTC to 2024-02-13 12:13:06 UTC

- Update compiletest directives to be in `ui_test` style `//`@`` (rust-lang/rustc-dev-guide#1895)
- Add notes on tweak rust-analyzer.check.overrideCommand (rust-lang/rustc-dev-guide#1890)
- Fix more links (rust-lang/rustc-dev-guide#1884)
- Remove references to -Z ast-json and -Z ast-json-noexpand (rust-lang/rustc-dev-guide#1893)
- Specify ui test suite directives and add note on ignore-tidy directives (rust-lang/rustc-dev-guide#1892)
- Update docs about ui tests now using `//`@`` headers (rust-lang/rustc-dev-guide#1885)
- Make git rebase commands more bulletproof (rust-lang/rustc-dev-guide#1889)
- updating-llvm.md: command does not work (rust-lang/rustc-dev-guide#1887)
- fix update llvm build command (rust-lang/rustc-dev-guide#1886)
rust-timer added a commit to rust-lang-ci/rust that referenced this pull request Feb 27, 2024
Rollup merge of rust-lang#121639 - rustbot:docs-update, r=ehuss

Update books

## rust-lang/book

1 commits in 71352deb20727b4dda9ebfe8182709d5bf17dfea..19c40bfd2d57641d962f3119a1c343355f1b3c5e
2024-02-19 20:39:35 UTC to 2024-02-19 20:39:35 UTC

- Rust upgrades (rust-lang/book#3844)

## rust-lang/edition-guide

3 commits in 76bd48a273a0e0413a3bf22c699112d41497b99e..e1eead1181a691e56299294d5f1d62fe7a26d317
2024-02-24 21:15:28 UTC to 2024-02-17 21:44:36 UTC

- Rename static_mut_refs (rust-lang/edition-guide#293)
- Add 2024 prelude (rust-lang/edition-guide#292)
- Add some more initial stub docs for 2024. (rust-lang/edition-guide#291)

## rust-lang/reference

5 commits in 8227666de13f6e7bb32dea9dc42e841adb5ce4b7..3417f866932cb1c09c6be0f31d2a02ee01b4b95d
2024-02-25 19:37:14 UTC to 2024-02-15 13:28:59 UTC

- Document `target_abi` (rust-lang/reference#1446)
- Add `rust-toolchain.toml` and revise README (rust-lang/reference#1474)
- Clarify semantics of the various pointer to pointer casts (rust-lang/reference#1451)
- Update aarch64 target feature docs to match LLVM (rust-lang/reference#1470)
- Fix grammar for TypePathFn (rust-lang/reference#1281)

## rust-lang/rust-by-example

4 commits in e188d5d466f7f3ff9f1d518393235f4fe951be46..57f1e708f5d5850562bc385aaf610e6af14d6ec8
2024-02-24 18:31:19 UTC to 2024-02-14 13:06:53 UTC

- bug: fix typo (rust-lang/rust-by-example#1822)
- Fix typo in attribute.md (rust-lang/rust-by-example#1818)
- Add Japanese translation (rust-lang/rust-by-example#1794)
- Remove unused .travis.yml file (rust-lang/rust-by-example#1816)

## rust-lang/rustc-dev-guide

9 commits in 1f30cc7..7b0ef5b
2024-02-22 19:15:52 UTC to 2024-02-13 12:13:06 UTC

- Update compiletest directives to be in `ui_test` style `//`@`` (rust-lang/rustc-dev-guide#1895)
- Add notes on tweak rust-analyzer.check.overrideCommand (rust-lang/rustc-dev-guide#1890)
- Fix more links (rust-lang/rustc-dev-guide#1884)
- Remove references to -Z ast-json and -Z ast-json-noexpand (rust-lang/rustc-dev-guide#1893)
- Specify ui test suite directives and add note on ignore-tidy directives (rust-lang/rustc-dev-guide#1892)
- Update docs about ui tests now using `//`@`` headers (rust-lang/rustc-dev-guide#1885)
- Make git rebase commands more bulletproof (rust-lang/rustc-dev-guide#1889)
- updating-llvm.md: command does not work (rust-lang/rustc-dev-guide#1887)
- fix update llvm build command (rust-lang/rustc-dev-guide#1886)
github-actions bot pushed a commit to rust-lang/miri that referenced this pull request Feb 27, 2024
Update books

## rust-lang/book

1 commits in 71352deb20727b4dda9ebfe8182709d5bf17dfea..19c40bfd2d57641d962f3119a1c343355f1b3c5e
2024-02-19 20:39:35 UTC to 2024-02-19 20:39:35 UTC

- Rust upgrades (rust-lang/book#3844)

## rust-lang/edition-guide

3 commits in 76bd48a273a0e0413a3bf22c699112d41497b99e..e1eead1181a691e56299294d5f1d62fe7a26d317
2024-02-24 21:15:28 UTC to 2024-02-17 21:44:36 UTC

- Rename static_mut_refs (rust-lang/edition-guide#293)
- Add 2024 prelude (rust-lang/edition-guide#292)
- Add some more initial stub docs for 2024. (rust-lang/edition-guide#291)

## rust-lang/reference

5 commits in 8227666de13f6e7bb32dea9dc42e841adb5ce4b7..3417f866932cb1c09c6be0f31d2a02ee01b4b95d
2024-02-25 19:37:14 UTC to 2024-02-15 13:28:59 UTC

- Document `target_abi` (rust-lang/reference#1446)
- Add `rust-toolchain.toml` and revise README (rust-lang/reference#1474)
- Clarify semantics of the various pointer to pointer casts (rust-lang/reference#1451)
- Update aarch64 target feature docs to match LLVM (rust-lang/reference#1470)
- Fix grammar for TypePathFn (rust-lang/reference#1281)

## rust-lang/rust-by-example

4 commits in e188d5d466f7f3ff9f1d518393235f4fe951be46..57f1e708f5d5850562bc385aaf610e6af14d6ec8
2024-02-24 18:31:19 UTC to 2024-02-14 13:06:53 UTC

- bug: fix typo (rust-lang/rust-by-example#1822)
- Fix typo in attribute.md (rust-lang/rust-by-example#1818)
- Add Japanese translation (rust-lang/rust-by-example#1794)
- Remove unused .travis.yml file (rust-lang/rust-by-example#1816)

## rust-lang/rustc-dev-guide

9 commits in 1f30cc7cca9a3433bc1872abdc98960b36c21ca0..7b0ef5b0bea5e3ce3b9764aa5754a60e2cc05c52
2024-02-22 19:15:52 UTC to 2024-02-13 12:13:06 UTC

- Update compiletest directives to be in `ui_test` style `//`@`` (rust-lang/rustc-dev-guide#1895)
- Add notes on tweak rust-analyzer.check.overrideCommand (rust-lang/rustc-dev-guide#1890)
- Fix more links (rust-lang/rustc-dev-guide#1884)
- Remove references to -Z ast-json and -Z ast-json-noexpand (rust-lang/rustc-dev-guide#1893)
- Specify ui test suite directives and add note on ignore-tidy directives (rust-lang/rustc-dev-guide#1892)
- Update docs about ui tests now using `//`@`` headers (rust-lang/rustc-dev-guide#1885)
- Make git rebase commands more bulletproof (rust-lang/rustc-dev-guide#1889)
- updating-llvm.md: command does not work (rust-lang/rustc-dev-guide#1887)
- fix update llvm build command (rust-lang/rustc-dev-guide#1886)
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4 participants