[GHC] #16026: No way to run a subset of the testsuite

[GHC]

#16026: No way to run a subset of the testsuite
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        Reporter:  bgamari           |                Owner:  alpmestan
            Type:  feature request   |               Status:  new
        Priority:  high              |            Milestone:  8.8.1
       Component:  Build System      |              Version:  8.6.2
  (Hadrian)                          |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by goldfire):

 Just happened to come across this. As an avid user of the feature you're
 describing, I would want a way to do this on the command line. Other
 options are good, too (e.g. setting an env var so that way I can run the
 same tests over and over), but inessential (for me).

 Separate from the `make TEST=...` functionality, I also make regular use
 of the fact that running `make` in different subdirectories of `tests`
 runs only subsets. For example, I'll go into `testsuite/tests/typecheck`
 and run `make` just to run type-checking tests. Sometimes I even just want
 the `should_fail` directory of that. I would certainly miss the ability to
 run subsets like this if it were gone. It's so easy (just change dirs) and
 so useful.

 Thanks for all the work you're putting into this!

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16026#comment:8>
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