test for Lint.

test/LintSpec.hs

@@ -0,0 +1,13 @@
+module LintSpec where
+
+import Test.Hspec
+import Lint
+import Types
+
+spec :: Spec
+spec = do
+    describe "lintSyntax" $ do
+        it "check syntax with HList" $ do
+            res <- lintSyntax defaultOptions "test/data/hlint.hs"
+            res `shouldBe` "test/data/hlint.hs:4:8: Error: Redundant do\NULFound:\NUL  do putStrLn \"Hello, world!\"\NULWhy not:\NUL  putStrLn \"Hello, world!\"\n"
+

test/data/hlint.hs

@@ -0,0 +1,5 @@
+module Hlist where
+
+main :: IO ()
+main = do
+    putStrLn "Hello, world!"