Commits on Nov 16, 2023

1. testsuite: Be explicit about runtime test dependencies …

   Issue haskell#8356 reports occasional errors from running the testsuite about
   multiple package versions available. This stems from the invokation of
   `runghc` not being explicit about all dependencies of the testsuite.
   
   The solution is provide a component in the cabal file which is explicit
   about which packages the tests can depend on. This component has a
   build-depends section which lists all the dependencies that the tests
   require.
   
   It would be better if this component was a library component but we
   can't do this with a Custom setup because of limitations to do with
   per-component builds.
   
   Then we also enable `-hide-all-packages`, so the dependency will not be
   available if it is not explicitly listed as a dependency.
   
   You could also imagine a future where the Setup.hs script found the test
   files and compiled a single executable which would run all the tests,
   rather than invoking runghc on each one individually.
   
   Fixes haskell#8356

   

   mpickering authored and Mikolaj committed Nov 16, 2023
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