Validate repeatable directives

tests/Language/GraphQL/Validate/RulesSpec.hs

@@ -15,6 +15,8 @@ import Data.Text (Text)
 import qualified Language.GraphQL.AST as AST
 import Language.GraphQL.TH
 import Language.GraphQL.Type
+import qualified Language.GraphQL.Type.Schema as Schema
+import qualified Language.GraphQL.AST.DirectiveLocation as DirectiveLocation
 import qualified Language.GraphQL.Type.In as In
 import qualified Language.GraphQL.Type.Out as Out
 import Language.GraphQL.Validate
@@ -22,7 +24,9 @@ import Test.Hspec (Spec, context, describe, it, shouldBe, shouldContain)
 import Text.Megaparsec (parse, errorBundlePretty)
 
 petSchema :: Schema IO
-petSchema = schema queryType Nothing (Just subscriptionType) mempty
+petSchema = schema queryType Nothing (Just subscriptionType)
+    $ HashMap.singleton "repeat"
+    $ Schema.Directive Nothing mempty True [DirectiveLocation.ExecutableDirectiveLocation DirectiveLocation.Field]
 
 queryType :: ObjectType IO
 queryType = ObjectType "Query" Nothing [] $ HashMap.fromList
@@ -494,7 +498,7 @@ spec =
                         }
                  in validate queryString `shouldBe` [expected]
 
-        context "uniqueDirectiveNamesRule" $
+        context "uniqueDirectiveNamesRule" $ do
             it "rejects more than one directive per location" $
                 let queryString = [gql|
                   query ($foo: Boolean = true, $bar: Boolean = false) {
@@ -510,6 +514,16 @@ spec =
                         }
                  in validate queryString `shouldBe` [expected]
 
+            it "allows repeating repeatable directives" $
+                let queryString = [gql|
+                  query {
+                    dog @repeat @repeat {
+                      name
+                    }
+                  }
+                |]
+                 in validate queryString `shouldBe` []
+
         context "uniqueVariableNamesRule" $
             it "rejects duplicate variables" $
                 let queryString = [gql|