[6.2] Emit "barriers" into the stdout/stderr streams of an exit test. #1220
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Contributor
grynspan
commented
Jul 10, 2025
grynspan
commented
- Explanation: Emit a specific sequence of bytes into an exit test's stdout and stderr streams to reduce the noise level during exit testing.
- Scope: Exit test stdout/stderr capture.
- Issues: N/A
- Original PRs: Emit "barriers" into the stdout/stderr streams of an exit test. #1049
- Risk: Low
- Testing: New unit tests.
- Reviewers: @stmontgomery @briancroom
This PR causes Swift Testing to write "barriers" (known sequences of bytes) to `stdout` and `stderr` in the child process created by an exit test. Then, in the parent, these values are used to splice off any leading or trailing output that wasn't generated by the exit test's body (such as content generated by the host process, XCTest/Xcode, etc.) This reduces the amount of extraneous data reported back to the exit test's parent process. Thanks to @briancroom for the suggestion. ### Checklist: - [x] Code and documentation should follow the style of the [Style Guide](https://github.com/apple/swift-testing/blob/main/Documentation/StyleGuide.md). - [x] If public symbols are renamed or modified, DocC references should be updated.
grynspan
requested review from
stmontgomery,
briancroom and
suzannaratcliff
as code owners
|
@swift-ci test |
grynspan
added
bug
briancroom
approved these changes
Jul 11, 2025
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