fix: ensure that the xunit reporter emits well-formed XML #5001
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Edit: I have updated this PR to fix the bug in addition to creating a failing test.
Description of the Change
From the PR:
Alternate Designs
This is a lossy conversion. An alternative to displaying the replacement character would be to display some message explaining what character has been replaced. This is a lot less verbose and will be easier to read when your tests are outputting ANSI control codes, and if the original text is needed you can rerun the tests locally.
Why should this be in core?
This is a bug. Mocha is generating malformed XML documents that cannot be parsed.
Benefits
XML documents generated by the XUnit reporter are now well-formed and thus can be parsed.
Possible Drawbacks
It's a lossy conversion. Probably 99% of the time it's going to be an ANSI control code being removed.
Applicable issues
This is a bug fix.