Lazy output stream for test.xml, does not produce a file if no test xml data was produced

This fixes #5289.

The general problem is, if an exception is thrown during creation of the `TestSuiteModel`, the test runner will exit, closing off the OutputStream it had created for writing the test.xml. Unfortunately, if nothing was actually written to the stream, closing it will create a 0-byte test.xml on disk regardless.

This PR wraps the OutputStream in a lazy producer, only creating the actual stream if something was written to it. This guarantees test.xml will contain actual content.

Closes #6000.

PiperOrigin-RevId: 211799139
1 file changed
tree: 18d9a6f9e6b5e302875294c09193dbce31848d03
  1. .bazelci/
  2. examples/
  3. scripts/
  4. site/
  5. src/
  6. third_party/
  7. tools/
  8. .gitattributes
  9. .gitignore
  10. AUTHORS
  11. BUILD
  12. CHANGELOG.md
  13. CODEOWNERS
  14. combine_distfiles.py
  15. combine_distfiles_to_tar.sh
  16. compile.sh
  17. CONTRIBUTING.md
  18. CONTRIBUTORS
  19. distdir.bzl
  20. ISSUE_TEMPLATE.md
  21. LICENSE
  22. README.md
  23. WORKSPACE
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