Parse schema extensions

tests/Language/GraphQL/AST/LexerSpec.hs

@@ -8,7 +8,7 @@ import Data.Text (Text)
 import Data.Void (Void)
 import Language.GraphQL.AST.Lexer
 import Test.Hspec (Spec, context, describe, it)
-import Test.Hspec.Megaparsec (shouldParse, shouldSucceedOn)
+import Test.Hspec.Megaparsec (shouldParse, shouldFailOn, shouldSucceedOn)
 import Text.Megaparsec (ParseErrorBundle, parse)
 import Text.RawString.QQ (r)
 
@@ -89,6 +89,8 @@ spec = describe "Lexer" $ do
             parse amp "" "&" `shouldParse` "&"
         it "lexes schema extensions" $
             parse (extend "schema") "" `shouldSucceedOn` "extend schema"
+        it "fails if the given token doesn't match" $
+            parse (extend "schema") "" `shouldFailOn` "extend shema"
 
 runBetween :: (Parser () -> Parser ()) -> Text -> Either (ParseErrorBundle Text Void) ()
 runBetween parser = parse (parser $ pure ()) ""

tests/Language/GraphQL/AST/ParserSpec.hs

@@ -4,9 +4,11 @@ module Language.GraphQL.AST.ParserSpec
     ( spec
     ) where
 
+import Data.List.NonEmpty (NonEmpty(..))
+import Language.GraphQL.AST.Document
 import Language.GraphQL.AST.Parser
 import Test.Hspec (Spec, describe, it)
-import Test.Hspec.Megaparsec (shouldSucceedOn)
+import Test.Hspec.Megaparsec (shouldParse, shouldSucceedOn)
 import Text.Megaparsec (parse)
 import Text.RawString.QQ (r)
 
@@ -116,3 +118,20 @@ spec = describe "Parser" $ do
               | FIELD
               | FRAGMENT_SPREAD
         |]
+
+    it "parses schema extension with a new directive" $
+        parse document "" `shouldSucceedOn`[r|
+            extend schema @newDirective
+        |]
+
+    it "parses schema extension with an operation type definition" $
+        parse document "" `shouldSucceedOn` [r|extend schema { query: Query }|]
+
+    it "parses schema extension with an operation type and directive" $
+        let newDirective = Directive "newDirective" []
+            testSchemaExtension = TypeSystemExtension
+                $ SchemaExtension
+                $ SchemaOperationExtension [newDirective]
+                $ OperationTypeDefinition Query "Query" :| []
+            query = [r|extend schema @newDirective { query: Query }|]
+         in parse document "" query `shouldParse` (testSchemaExtension :| [])