Install notification handlers for cabal files

The cabal formatters read the file contents from the shake VFS. Thus, we
need to make sure there are notification handlers that add the cabal
files to the VFS!

Formatters have to depend on the `hls-cabal-plugin` to have the
necessary notification handlers installed during test time.

Author: fendor

haskell-language-server.cabal

@@ -137,6 +137,7 @@ library hls-cabal-fmt-plugin
     , process-extras
     , text
 
+-- The `hls-cabal-plugin` is needed for tests, as we need to install notification handlers
 test-suite hls-cabal-fmt-plugin-tests
   import:           defaults, pedantic, test-defaults, warnings
   if !flag(cabalfmt)
@@ -148,7 +149,9 @@ test-suite hls-cabal-fmt-plugin-tests
     , base
     , directory
     , filepath
+    , haskell-language-server:hls-cabal-plugin
     , haskell-language-server:hls-cabal-fmt-plugin
+    , hls-plugin-api        == 2.9.0.1
     , hls-test-utils        == 2.9.0.1
 
   if flag(isolateCabalfmtTests)
@@ -192,6 +195,7 @@ library hls-cabal-gild-plugin
     , mtl
     , process-extras
 
+-- The `hls-cabal-plugin` is needed for tests, as we need to install notification handlers
 test-suite hls-cabal-gild-plugin-tests
   import:           defaults, pedantic, test-defaults, warnings
   if !flag(cabalgild)
@@ -203,7 +207,9 @@ test-suite hls-cabal-gild-plugin-tests
     , base
     , directory
     , filepath
+    , haskell-language-server:hls-cabal-plugin
     , haskell-language-server:hls-cabal-gild-plugin
+    , hls-plugin-api        == 2.9.0.1
     , hls-test-utils        == 2.9.0.1
 
   if flag(isolateCabalGildTests)

plugins/hls-cabal-fmt-plugin/test/Main.hs

@@ -1,14 +1,26 @@
 {-# LANGUAGE CPP               #-}
+{-# LANGUAGE LambdaCase        #-}
 {-# LANGUAGE OverloadedStrings #-}
 module Main
   ( main
   ) where
 
+import           Ide.Logger
+import qualified Ide.Plugin.Cabal    as Cabal
 import qualified Ide.Plugin.CabalFmt as CabalFmt
 import           System.Directory    (findExecutable)
 import           System.FilePath
 import           Test.Hls
 
+data TestLog
+  = LogCabalFmt CabalFmt.Log
+  | LogCabal Cabal.Log
+
+instance Pretty TestLog where
+  pretty = \case
+    LogCabalFmt msg -> pretty msg
+    LogCabal msg -> pretty msg
+
 data CabalFmtFound = Found | NotFound
 
 isTestIsolated :: Bool
@@ -30,8 +42,11 @@ main = do
   foundCabalFmt <- isCabalFmtFound
   defaultTestRunner (tests foundCabalFmt)
 
-cabalFmtPlugin :: PluginTestDescriptor CabalFmt.Log
-cabalFmtPlugin = mkPluginTestDescriptor CabalFmt.descriptor "cabal-fmt"
+cabalFmtPlugin :: PluginTestDescriptor TestLog
+cabalFmtPlugin = mconcat
+  [ mkPluginTestDescriptor (CabalFmt.descriptor . cmapWithPrio LogCabalFmt) "cabal-fmt"
+  , mkPluginTestDescriptor (Cabal.descriptor . cmapWithPrio LogCabal) "cabal"
+  ]
 
 tests :: CabalFmtFound -> TestTree
 tests found = testGroup "cabal-fmt"

plugins/hls-cabal-gild-plugin/test/Main.hs

@@ -1,14 +1,26 @@
 {-# LANGUAGE CPP               #-}
+{-# LANGUAGE LambdaCase        #-}
 {-# LANGUAGE OverloadedStrings #-}
 module Main
   ( main
   ) where
 
+import           Ide.Logger
+import qualified Ide.Plugin.Cabal     as Cabal
 import qualified Ide.Plugin.CabalGild as CabalGild
 import           System.Directory     (findExecutable)
 import           System.FilePath
 import           Test.Hls
 
+data TestLog
+  = LogCabalGild CabalGild.Log
+  | LogCabal Cabal.Log
+
+instance Pretty TestLog where
+  pretty = \case
+    LogCabalGild msg -> pretty msg
+    LogCabal msg -> pretty msg
+
 data CabalGildFound = Found | NotFound
 
 isTestIsolated :: Bool
@@ -30,8 +42,11 @@ main = do
   foundCabalFmt <- isCabalFmtFound
   defaultTestRunner (tests foundCabalFmt)
 
-cabalGildPlugin :: PluginTestDescriptor CabalGild.Log
-cabalGildPlugin = mkPluginTestDescriptor CabalGild.descriptor "cabal-gild"
+cabalGildPlugin :: PluginTestDescriptor TestLog
+cabalGildPlugin = mconcat
+  [ mkPluginTestDescriptor (CabalGild.descriptor . cmapWithPrio LogCabalGild) "cabal-gild"
+  , mkPluginTestDescriptor (Cabal.descriptor . cmapWithPrio LogCabal) "cabal"
+  ]
 
 tests :: CabalGildFound -> TestTree
 tests found = testGroup "cabal-gild"