[wp-trac] [WordPress Trac] #40532: Find a workaround for unit tests that have a dependency on XDebug

[WordPress Trac]

#40532: Find a workaround for unit tests that have a dependency on XDebug
------------------------------+------------------------------------------
 Reporter:  johnbillion       |      Owner:
     Type:  defect (bug)      |     Status:  new
 Priority:  normal            |  Milestone:  Awaiting Review
Component:  Build/Test Tools  |    Version:
 Severity:  normal            |   Keywords:  needs-patch needs-unit-tests
  Focuses:                    |
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 In #39978, XDebug was disabled when running the test suite on Travis. This
 resulted in a 40% increase in build speed and a 40% decrease in developer
 frustration.

 Unfortunately it was overlooked that two tests in core have a dependency
 on XDebug:

 * `Tests_Ajax_Response::test_response_charset_in_header()`
 ([https://core.trac.wordpress.org/browser/tags/4.7.4/tests/phpunit/tests/ajax/Response.php?marks=72-74#L60
 ref])
 * `Tests_oEmbed_HTTP_Headers::test_rest_pre_serve_request_headers()`
 ([https://core.trac.wordpress.org/browser/tags/4.7.4/tests/phpunit/tests/oembed/headers.php?marks=11-13#L3
 ref])

 Both of these tests are skipped when XDebug isn't available, so they're no
 longer tested on Travis.

 A workaround needs to be found for these tests so they no longer rely on
 XDebug.

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Ticket URL: <https://core.trac.wordpress.org/ticket/40532>
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