Add a dummy test case

Author: berberman

hls-test-utils/src/Test/Hls/Util.hs

@@ -112,10 +112,13 @@ data GhcVersion
   | GHC88
   | GHC86
   | GHC84
+  | GHC901
   deriving (Eq,Show)
 
 ghcVersion :: GhcVersion
-#if (defined(MIN_VERSION_GLASGOW_HASKELL) && (MIN_VERSION_GLASGOW_HASKELL(8,10,0,0)))
+#if (defined(MIN_VERSION_GLASGOW_HASKELL) && (MIN_VERSION_GLASGOW_HASKELL(9,0,1,0)))
+ghcVersion = GHC901
+#elif (defined(MIN_VERSION_GLASGOW_HASKELL) && (MIN_VERSION_GLASGOW_HASKELL(8,10,0,0)))
 ghcVersion = GHC810
 #elif (defined(MIN_VERSION_GLASGOW_HASKELL) && (MIN_VERSION_GLASGOW_HASKELL(8,8,0,0)))
 ghcVersion = GHC88

plugins/hls-eval-plugin/test/Main.hs

@@ -20,7 +20,11 @@ import           System.FilePath         ((</>))
 import           Test.Hls
 
 main :: IO ()
-main = defaultTestRunner tests
+main = defaultTestRunner $ if ghcVersion == GHC901 then tests else dummyTestCase
+
+-- | Now we only maintain test cases for GHC 9.0.1
+dummyTestCase :: TestTree
+dummyTestCase = testCase "Tests are skipped before GHC 9.0.1" $ pure ()
 
 evalPlugin :: PluginDescriptor IdeState
 evalPlugin = Eval.descriptor "eval"