[GHC] #15093: Testsuite should output JUnit XML for better CircleCI support

[GHC]

#15093: Testsuite should output JUnit XML for better CircleCI support
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           Reporter:  mpickering     |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:  8.6.1
          Component:  Compiler       |           Version:  8.2.2
           Keywords:  CI             |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 At the moment when builds are run on CircleCI, failures are not reported
 in any special way. This means you have to download the build log to see
 the bottom of the testing phase as it is too long to see in the browser.

 Instead, you can output the test results as JUnit XML which then CircleCI
 can slurp up and present nicely. https://circleci.com/docs/2.0
 /configuration-reference/#store_test_results

 There is a python library which makes it easy to generate this output.
 https://github.com/kyrus/python-junit-xml

 Even better, an actual python testing library could be used which could
 automatically output this information.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15093>
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