2 files changed, 59 insertions, 0 deletions
diff --git a/tests/Language/Elna/ParserSpec.hs b/tests/Language/Elna/ParserSpec.hs
new file mode 100644
index 0000000..11907ab
--- /dev/null
+++ b/tests/Language/Elna/ParserSpec.hs
@@ -0,0 +1,58 @@
+module Language.Elna.ParserSpec
+    ( spec
+    ) where
+
+import Test.Hspec (Spec, describe, it, pendingWith, xit)
+import Test.Hspec.Megaparsec (shouldParse, shouldSucceedOn, parseSatisfies)
+import Language.Elna.Parser (programP)
+import Text.Megaparsec (parse)
+import Language.Elna.AST
+    ( Declaration(..)
+    , Parameter(..)
+    , Program(..)
+    , TypeExpression(..)
+    )
+
+spec :: Spec
+spec =
+    describe "programP" $ do
+        it "parses an empty main function" $
+            parse programP "" `shouldSucceedOn` "proc main() {}"
+
+        it "parses type definition for a type starting like array" $
+            let expected = Program [TypeDefinition "t" $ NamedType "arr"]
+                actual = parse programP "" "type t = arr"
+             in actual `shouldParse` expected
+
+        it "parses array type definition" $
+            let expected = Program [TypeDefinition "t" $ ArrayType (NamedType "integer") 10]
+                actual = parse programP "" "type t = array[10] of integer"
+             in actual `shouldParse` expected
+
+        it "parses parameters" $
+            let given = "proc main(x: integer) {}"
+                parameters = [Parameter "x" (NamedType "integer") False]
+                expected = Program [ProcedureDefinition "main" parameters [] []]
+                actual = parse programP "" given
+             in actual `shouldParse` expected
+
+        it "parses ref parameters" $
+            let given = "proc main(x: integer, ref y: boolean) {}"
+                parameters =
+                    [ Parameter "x" (NamedType "integer") False
+                    , Parameter "y" (NamedType "boolean") True
+                    ]
+                expected = Program [ProcedureDefinition "main" parameters [] []]
+                actual = parse programP "" given
+             in actual `shouldParse` expected
+
+        it "parses variable declaration" $
+            let given = "proc main() { var x: integer; }"
+                expected (Program [ProcedureDefinition _ _ variables _]) =
+                    not $ null variables
+                expected _ = False
+                actual = parse programP "" given
+             in actual `parseSatisfies` expected
+
+        it "parses procedure body statements" $
+            pendingWith "Not implemented"
diff --git a/tests/Spec.hs b/tests/Spec.hs
new file mode 100644
index 0000000..a824f8c
--- /dev/null
+++ b/tests/Spec.hs
@@ -0,0 +1 @@
+{-# OPTIONS_GHC -F -pgmF hspec-discover #-}