How to run only one ghcide test?

[xsebek]

The contributing docs give an example of how to run only one test in HLS functional tests:

cabal run haskell-language-server:func-test -- -p "hlint enables"

But for ghcide tests this does not work:

cd ghcide
cabal run ghcide:ghcide-tests -- -p "/completion/"
# ghcide
#  initialize response capabilities
#       completion:                                                  FAIL
#      Exception: ghcide: createProcess: posix_spawnp: does not exist (No such file or directory)
#      Use -p '/completion/&&/   completion/' to rerun this test only.

The result is the same when using the test binary directly.

Is running only one test supported?

[pepeiborra]

This guidance is flawed. The right way to run one test is:

cabal test haskell-language-server:func-test --test-options="-p \"hlint enables\""

And for ghcide:

cabal test ghcide --test-options="-p \"add missing module\""