Make sure the liquid haskell test files are generated for unit-test

We must run the liquid exe to generate results to be parsed.

src/Haskell/Ide/Engine/Plugin/Liquid.hs

@@ -166,10 +166,19 @@ runLiquidHaskell fp = do
           cp = (shell cmd) { cwd = Just dir }
       -- logm $ "runLiquidHaskell:cmd=[" ++ cmd ++ "]"
       mpp <- lookupEnv "GHC_PACKAGE_PATH"
+      mge <- lookupEnv "GHC_ENVIRONMENT"
       -- logm $ "runLiquidHaskell:mpp=[" ++ show mpp ++ "]"
+      -- env <- getEnvironment
+      -- logm $ "runLiquidHaskell:env=[" ++ show env ++ "]"
       (ec,o,e) <- bracket
-        (unsetEnv "GHC_PACKAGE_PATH")
-        (\_ -> mapM_ (setEnv "GHC_PACKAGE_PATH") mpp)
+        (do
+            unsetEnv "GHC_ENVIRONMENT"
+            unsetEnv "GHC_PACKAGE_PATH"
+        )
+        (\_ -> do
+            mapM_ (setEnv "GHC_PACKAGE_PATH") mpp
+            mapM_ (setEnv "GHC_ENVIRONMENT" ) mge
+        )
         (\_ -> readCreateProcessWithExitCode cp "")
       -- logm $ "runLiquidHaskell:v=" ++ show (ec,o,e)
       return $ Just (ec,[o,e])

test/unit/LiquidSpec.hs

@@ -3,6 +3,7 @@
 module LiquidSpec where
 
 import           Data.Aeson
+import           Data.List
 import qualified Data.ByteString.Lazy as BS
 import qualified Data.Text            as T
 import qualified Data.Text.IO         as T
@@ -11,8 +12,10 @@ import           Data.Maybe (isJust)
 import           Haskell.Ide.Engine.MonadTypes
 import           Haskell.Ide.Engine.Plugin.Liquid
 import           System.Directory
+import           System.Exit
 import           System.FilePath
 import           Test.Hspec
+import Control.Monad.IO.Class
 
 main :: IO ()
 main = hspec spec
@@ -28,18 +31,15 @@ spec = do
 
     -- ---------------------------------
 
-    -- AZ: this test has been moved to func-tests, stack > 2.1 sets
-    -- its own package environment, we can't run it from here.
-
-    -- -- This produces some products in /test/testdata/liquid/.liquid/ that is used in subsequent test
-    -- it "runs the liquid haskell exe" $ do
-    --   let
-    --     fp = cwd </> "test/testdata/liquid/Evens.hs"
-    --     -- fp = "/home/alanz/tmp/haskell-proc-play/Evens.hs"
-    --     -- uri = filePathToUri fp
-    --   Just (ef, (msg:_)) <- runLiquidHaskell fp
-    --   msg `shouldSatisfy` isPrefixOf "RESULT\n[{\"start\":{\"line\":9,\"column\":1},\"stop\":{\"line\":9,\"column\":8},\"message\":\"Error: Liquid Type Mismatch\\n  Inferred type\\n    VV : {v : Int | v == (7 : int)}\\n \\n  not a subtype of Required type\\n    VV : {VV : Int | VV mod 2 == 0}\\n"
-    --   ef `shouldBe` ExitFailure 1
+    -- This produces some products in /test/testdata/liquid/.liquid/
+    -- that are used in subsequent test
+    it "runs the liquid haskell exe" $ do
+      let
+        fp = cwd </> "test/testdata/liquid/Evens.hs"
+      Just (ef, (msg:_)) <- runLiquidHaskell fp
+      liftIO $ putStrLn $ "msg=" ++ msg
+      msg `shouldSatisfy` isPrefixOf "RESULT\n[{\"start\":{\"line\""
+      ef `shouldBe` ExitFailure 1
 
     -- ---------------------------------
     it "gets annot file paths" $ do