{- This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/. -} {-# LANGUAGE OverloadedStrings #-} module Language.GraphQL.Validate.RulesSpec ( spec ) where import Data.Foldable (toList) import qualified Data.HashMap.Strict as HashMap import Data.Text (Text) import qualified Language.GraphQL.AST as AST 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 import Test.Hspec (Spec, context, describe, it, shouldBe, shouldContain) import Text.Megaparsec (parse, errorBundlePretty) petSchema :: Schema IO 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 [ ("dog", dogResolver) , ("cat", catResolver) , ("findDog", findDogResolver) , ("findCats", findCatsResolver) ] where dogField = Field Nothing (Out.NamedObjectType dogType) mempty dogResolver = ValueResolver dogField $ pure Null findDogArguments = HashMap.singleton "complex" $ In.Argument Nothing (In.NonNullInputObjectType dogDataType) Nothing findDogField = Field Nothing (Out.NamedObjectType dogType) findDogArguments findDogResolver = ValueResolver findDogField $ pure Null catField = Field Nothing (Out.NamedObjectType catType) mempty catResolver = ValueResolver catField $ pure Null findCatsArguments = HashMap.singleton "commands" $ In.Argument Nothing (In.NonNullListType $ In.NonNullEnumType catCommandType) $ Just $ List [] findCatsField = Field Nothing (Out.NonNullListType $ Out.NonNullObjectType catType) findCatsArguments findCatsResolver = ValueResolver findCatsField $ pure $ List [] catCommandType :: EnumType catCommandType = EnumType "CatCommand" Nothing $ HashMap.fromList [ ("JUMP", EnumValue Nothing) ] catType :: ObjectType IO catType = ObjectType "Cat" Nothing [petType] $ HashMap.fromList [ ("name", nameResolver) , ("nickname", nicknameResolver) , ("doesKnowCommands", doesKnowCommandsResolver) , ("meowVolume", meowVolumeResolver) ] where meowVolumeField = Field Nothing (Out.NamedScalarType int) mempty meowVolumeResolver = ValueResolver meowVolumeField $ pure $ Int 3 doesKnowCommandsType = In.NonNullListType $ In.NonNullEnumType catCommandType doesKnowCommandsField = Field Nothing (Out.NonNullScalarType boolean) $ HashMap.singleton "catCommands" $ In.Argument Nothing doesKnowCommandsType Nothing doesKnowCommandsResolver = ValueResolver doesKnowCommandsField $ pure $ Boolean True nameResolver :: Resolver IO nameResolver = ValueResolver nameField $ pure "Name" where nameField = Field Nothing (Out.NonNullScalarType string) mempty nicknameResolver :: Resolver IO nicknameResolver = ValueResolver nicknameField $ pure "Nickname" where nicknameField = Field Nothing (Out.NamedScalarType string) mempty dogCommandType :: EnumType dogCommandType = EnumType "DogCommand" Nothing $ HashMap.fromList [ ("SIT", EnumValue Nothing) , ("DOWN", EnumValue Nothing) , ("HEEL", EnumValue Nothing) ] dogType :: ObjectType IO dogType = ObjectType "Dog" Nothing [petType] $ HashMap.fromList [ ("name", nameResolver) , ("nickname", nicknameResolver) , ("barkVolume", barkVolumeResolver) , ("doesKnowCommand", doesKnowCommandResolver) , ("isHouseTrained", isHouseTrainedResolver) , ("owner", ownerResolver) ] where barkVolumeField = Field Nothing (Out.NamedScalarType int) mempty barkVolumeResolver = ValueResolver barkVolumeField $ pure $ Int 3 doesKnowCommandField = Field Nothing (Out.NonNullScalarType boolean) $ HashMap.singleton "dogCommand" $ In.Argument Nothing (In.NonNullEnumType dogCommandType) Nothing doesKnowCommandResolver = ValueResolver doesKnowCommandField $ pure $ Boolean True isHouseTrainedField = Field Nothing (Out.NonNullScalarType boolean) $ HashMap.singleton "atOtherHomes" $ In.Argument Nothing (In.NamedScalarType boolean) Nothing isHouseTrainedResolver = ValueResolver isHouseTrainedField $ pure $ Boolean True ownerField = Field Nothing (Out.NamedObjectType humanType) mempty ownerResolver = ValueResolver ownerField $ pure Null dogDataType :: InputObjectType dogDataType = InputObjectType "DogData" Nothing $ HashMap.singleton "name" nameInputField where nameInputField = InputField Nothing (In.NonNullScalarType string) Nothing sentientType :: InterfaceType IO sentientType = InterfaceType "Sentient" Nothing [] $ HashMap.singleton "name" $ Field Nothing (Out.NonNullScalarType string) mempty petType :: InterfaceType IO petType = InterfaceType "Pet" Nothing [] $ HashMap.singleton "name" $ Field Nothing (Out.NonNullScalarType string) mempty subscriptionType :: ObjectType IO subscriptionType = ObjectType "Subscription" Nothing [] $ HashMap.fromList [ ("newMessage", newMessageResolver) , ("disallowedSecondRootField", newMessageResolver) ] where newMessageField = Field Nothing (Out.NonNullObjectType messageType) mempty newMessageResolver = ValueResolver newMessageField $ pure $ Object HashMap.empty messageType :: ObjectType IO messageType = ObjectType "Message" Nothing [] $ HashMap.fromList [ ("sender", senderResolver) , ("body", bodyResolver) ] where senderField = Field Nothing (Out.NonNullScalarType string) mempty senderResolver = ValueResolver senderField $ pure "Sender" bodyField = Field Nothing (Out.NonNullScalarType string) mempty bodyResolver = ValueResolver bodyField $ pure "Message body." humanType :: ObjectType IO humanType = ObjectType "Human" Nothing [sentientType] $ HashMap.fromList [ ("name", nameResolver) , ("pets", petsResolver) ] where petsField = Field Nothing (Out.ListType $ Out.NonNullInterfaceType petType) mempty petsResolver = ValueResolver petsField $ pure $ List [] validate :: Text -> [Error] validate queryString = case parse AST.document "" queryString of Left parseErrors -> error $ errorBundlePretty parseErrors Right ast -> toList $ document petSchema specifiedRules ast spec :: Spec spec = describe "document" $ do context "executableDefinitionsRule" $ it "rejects type definitions" $ let queryString = "query getDogName {\n\ \ dog {\n\ \ name\n\ \ color\n\ \ }\n\ \}\n\ \\n\ \extend type Dog {\n\ \ color: String\n\ \}" expected = Error { message = "Definition must be OperationDefinition or \ \FragmentDefinition." , locations = [AST.Location 8 1] } in validate queryString `shouldContain` [expected] context "singleFieldSubscriptionsRule" $ do it "rejects multiple subscription root fields" $ let queryString = "subscription sub {\n\ \ newMessage {\n\ \ body\n\ \ sender\n\ \ }\n\ \ disallowedSecondRootField\n\ \}" expected = Error { message = "Subscription \"sub\" must select only one top \ \level field." , locations = [AST.Location 1 1] } in validate queryString `shouldContain` [expected] it "rejects multiple subscription root fields coming from a fragment" $ let queryString = "subscription sub {\n\ \ ...multipleSubscriptions\n\ \}\n\ \\n\ \fragment multipleSubscriptions on Subscription {\n\ \ newMessage {\n\ \ body\n\ \ sender\n\ \ }\n\ \ disallowedSecondRootField\n\ \}" expected = Error { message = "Subscription \"sub\" must select only one top \ \level field." , locations = [AST.Location 1 1] } in validate queryString `shouldContain` [expected] it "finds corresponding subscription fragment" $ let queryString = "subscription sub {\n\ \ ...anotherSubscription\n\ \ ...multipleSubscriptions\n\ \}\n\ \fragment multipleSubscriptions on Subscription {\n\ \ newMessage {\n\ \ body\n\ \ }\n\ \ disallowedSecondRootField {\n\ \ sender\n\ \ }\n\ \}\n\ \fragment anotherSubscription on Subscription {\n\ \ newMessage {\n\ \ body\n\ \ sender\n\ \ }\n\ \}" expected = Error { message = "Subscription \"sub\" must select only one top \ \level field." , locations = [AST.Location 1 1] } in validate queryString `shouldBe` [expected] context "loneAnonymousOperationRule" $ it "rejects multiple anonymous operations" $ let queryString = "{\n\ \ dog {\n\ \ name\n\ \ }\n\ \}\n\ \\n\ \query getName {\n\ \ dog {\n\ \ owner {\n\ \ name\n\ \ }\n\ \ }\n\ \}" expected = Error { message = "This anonymous operation must be the only defined \ \operation." , locations = [AST.Location 1 1] } in validate queryString `shouldBe` [expected] context "uniqueOperationNamesRule" $ it "rejects operations with the same name" $ let queryString = "query dogOperation {\n\ \ dog {\n\ \ name\n\ \ }\n\ \}\n\ \\n\ \mutation dogOperation {\n\ \ mutateDog {\n\ \ id\n\ \ }\n\ \}" expected = Error { message = "There can be only one operation named \ \\"dogOperation\"." , locations = [AST.Location 1 1, AST.Location 7 1] } in validate queryString `shouldBe` [expected] context "uniqueFragmentNamesRule" $ it "rejects fragments with the same name" $ let queryString = "{\n\ \ dog {\n\ \ ...fragmentOne\n\ \ }\n\ \}\n\ \\n\ \fragment fragmentOne on Dog {\n\ \ name\n\ \}\n\ \\n\ \fragment fragmentOne on Dog {\n\ \ owner {\n\ \ name\n\ \ }\n\ \}" expected = Error { message = "There can be only one fragment named \ \\"fragmentOne\"." , locations = [AST.Location 7 1, AST.Location 11 1] } in validate queryString `shouldBe` [expected] context "fragmentSpreadTargetDefinedRule" $ it "rejects the fragment spread without a target" $ let queryString = "{\n\ \ dog {\n\ \ ...undefinedFragment\n\ \ }\n\ \}" expected = Error { message = "Fragment target \"undefinedFragment\" is \ \undefined." , locations = [AST.Location 3 5] } in validate queryString `shouldBe` [expected] context "fragmentSpreadTypeExistenceRule" $ do it "rejects fragment spreads without an unknown target type" $ let queryString = "{\n\ \ dog {\n\ \ ...notOnExistingType\n\ \ }\n\ \}\n\ \fragment notOnExistingType on NotInSchema {\n\ \ name\n\ \}" expected = Error { message = "Fragment \"notOnExistingType\" is specified on \ \type \"NotInSchema\" which doesn't exist in the \ \schema." , locations = [AST.Location 3 5] } in validate queryString `shouldBe` [expected] it "rejects inline fragments without a target" $ let queryString = "{\n\ \ ... on NotInSchema {\n\ \ name\n\ \ }\n\ \}" expected = Error { message = "Inline fragment is specified on type \ \\"NotInSchema\" which doesn't exist in the schema." , locations = [AST.Location 2 3] } in validate queryString `shouldBe` [expected] context "fragmentsOnCompositeTypesRule" $ do it "rejects fragments on scalar types" $ let queryString = "{\n\ \ dog {\n\ \ ...fragOnScalar\n\ \ }\n\ \}\n\ \fragment fragOnScalar on Int {\n\ \ name\n\ \}" expected = Error { message = "Fragment cannot condition on non composite type \ \\"Int\"." , locations = [AST.Location 6 1] } in validate queryString `shouldContain` [expected] it "rejects inline fragments on scalar types" $ let queryString = "{\n\ \ ... on Boolean {\n\ \ name\n\ \ }\n\ \}" expected = Error { message = "Fragment cannot condition on non composite type \ \\"Boolean\"." , locations = [AST.Location 2 3] } in validate queryString `shouldContain` [expected] context "noUnusedFragmentsRule" $ it "rejects unused fragments" $ let queryString = "fragment nameFragment on Dog { # unused\n\ \ name\n\ \}\n\ \\n\ \{\n\ \ dog {\n\ \ name\n\ \ }\n\ \}" expected = Error { message = "Fragment \"nameFragment\" is never used." , locations = [AST.Location 1 1] } in validate queryString `shouldBe` [expected] context "noFragmentCyclesRule" $ it "rejects spreads that form cycles" $ let queryString = "{\n\ \ dog {\n\ \ ...nameFragment\n\ \ }\n\ \}\n\ \fragment nameFragment on Dog {\n\ \ name\n\ \ ...barkVolumeFragment\n\ \}\n\ \fragment barkVolumeFragment on Dog {\n\ \ barkVolume\n\ \ ...nameFragment\n\ \}" error1 = Error { message = "Cannot spread fragment \"barkVolumeFragment\" \ \within itself (via barkVolumeFragment -> \ \nameFragment -> barkVolumeFragment)." , locations = [AST.Location 10 1] } error2 = Error { message = "Cannot spread fragment \"nameFragment\" within \ \itself (via nameFragment -> barkVolumeFragment -> \ \nameFragment)." , locations = [AST.Location 6 1] } in validate queryString `shouldBe` [error1, error2] context "uniqueArgumentNamesRule" $ it "rejects duplicate field arguments" $ let queryString = "{\n\ \ dog {\n\ \ isHouseTrained(atOtherHomes: true, atOtherHomes: true)\n\ \ }\n\ \}" expected = Error { message = "There can be only one argument named \ \\"atOtherHomes\"." , locations = [AST.Location 3 20, AST.Location 3 40] } in validate queryString `shouldBe` [expected] context "uniqueDirectiveNamesRule" $ do it "rejects more than one directive per location" $ let queryString = "query ($foo: Boolean = true, $bar: Boolean = false) {\n\ \ dog @skip(if: $foo) @skip(if: $bar) {\n\ \ name\n\ \ }\n\ \}" expected = Error { message = "There can be only one directive named \"skip\"." , locations = [AST.Location 2 7, AST.Location 2 23] } in validate queryString `shouldBe` [expected] it "allows repeating repeatable directives" $ let queryString = "query {\n\ \ dog @repeat @repeat {\n\ \ name\n\ \ }\n\ \}" in validate queryString `shouldBe` [] context "uniqueVariableNamesRule" $ it "rejects duplicate variables" $ let queryString = "query houseTrainedQuery($atOtherHomes: Boolean, $atOtherHomes: Boolean) {\n\ \ dog {\n\ \ isHouseTrained(atOtherHomes: $atOtherHomes)\n\ \ }\n\ \}" expected = Error { message = "There can be only one variable named \ \\"atOtherHomes\"." , locations = [AST.Location 1 25, AST.Location 1 49] } in validate queryString `shouldBe` [expected] context "variablesAreInputTypesRule" $ it "rejects non-input types as variables" $ let queryString = "query takesDogBang($dog: Dog!) {\n\ \ dog {\n\ \ isHouseTrained(atOtherHomes: $dog)\n\ \ }\n\ \}" expected = Error { message = "Variable \"$dog\" cannot be non-input type \ \\"Dog\"." , locations = [AST.Location 1 20] } in validate queryString `shouldContain` [expected] context "noUndefinedVariablesRule" $ do it "rejects undefined variables" $ let queryString = "query variableIsNotDefinedUsedInSingleFragment {\n\ \ dog {\n\ \ ...isHouseTrainedFragment\n\ \ }\n\ \}\n\ \\n\ \fragment isHouseTrainedFragment on Dog {\n\ \ isHouseTrained(atOtherHomes: $atOtherHomes)\n\ \}" expected = Error { message = "Variable \"$atOtherHomes\" is not defined by \ \operation \ \\"variableIsNotDefinedUsedInSingleFragment\"." , locations = [AST.Location 8 32] } in validate queryString `shouldBe` [expected] it "gets variable location inside an input object" $ let queryString = "query {\n\ \ findDog (complex: { name: $name }) {\n\ \ name\n\ \ }\n\ \}" expected = Error { message = "Variable \"$name\" is not defined." , locations = [AST.Location 2 29] } in validate queryString `shouldBe` [expected] it "gets variable location inside an array" $ let queryString = "query {\n\ \ findCats (commands: [JUMP, $command]) {\n\ \ name\n\ \ }\n\ \}" expected = Error { message = "Variable \"$command\" is not defined." , locations = [AST.Location 2 30] } in validate queryString `shouldBe` [expected] context "noUnusedVariablesRule" $ do it "rejects unused variables" $ let queryString = "query variableUnused($atOtherHomes: Boolean) {\n\ \ dog {\n\ \ isHouseTrained\n\ \ }\n\ \}" expected = Error { message = "Variable \"$atOtherHomes\" is never used in \ \operation \"variableUnused\"." , locations = [AST.Location 1 22] } in validate queryString `shouldBe` [expected] it "detects variables in properties of input objects" $ let queryString = "query withVar ($name: String!) {\n\ \ findDog (complex: { name: $name }) {\n\ \ name\n\ \ }\n\ \}" in validate queryString `shouldBe` [] context "uniqueInputFieldNamesRule" $ it "rejects duplicate fields in input objects" $ let queryString = "{\n\ \ findDog(complex: { name: \"Fido\", name: \"Jack\" }) {\n\ \ name\n\ \ }\n\ \}" expected = Error { message = "There can be only one input field named \"name\"." , locations = [AST.Location 2 22, AST.Location 2 36] } in validate queryString `shouldBe` [expected] context "fieldsOnCorrectTypeRule" $ it "rejects undefined fields" $ let queryString = "{\n\ \ dog {\n\ \ meowVolume\n\ \ }\n\ \}" expected = Error { message = "Cannot query field \"meowVolume\" on type \"Dog\"." , locations = [AST.Location 3 5] } in validate queryString `shouldBe` [expected] context "scalarLeafsRule" $ it "rejects scalar fields with not empty selection set" $ let queryString = "{\n\ \ dog {\n\ \ barkVolume {\n\ \ sinceWhen\n\ \ }\n\ \ }\n\ \}" expected = Error { message = "Field \"barkVolume\" must not have a selection \ \since type \"Int\" has no subfields." , locations = [AST.Location 3 5] } in validate queryString `shouldBe` [expected] context "knownArgumentNamesRule" $ do it "rejects field arguments missing in the type" $ let queryString = "{\n\ \ dog {\n\ \ doesKnowCommand(command: CLEAN_UP_HOUSE, dogCommand: SIT)\n\ \ }\n\ \}" expected = Error { message = "Unknown argument \"command\" on field \ \\"Dog.doesKnowCommand\"." , locations = [AST.Location 3 21] } in validate queryString `shouldBe` [expected] it "rejects directive arguments missing in the definition" $ let queryString = "{\n\ \ dog {\n\ \ isHouseTrained(atOtherHomes: true) @include(unless: false, if: true)\n\ \ }\n\ \}" expected = Error { message = "Unknown argument \"unless\" on directive \ \\"@include\"." , locations = [AST.Location 3 49] } in validate queryString `shouldBe` [expected] context "knownDirectiveNamesRule" $ it "rejects undefined directives" $ let queryString = "{\n\ \ dog {\n\ \ isHouseTrained(atOtherHomes: true) @ignore(if: true)\n\ \ }\n\ \}" expected = Error { message = "Unknown directive \"@ignore\"." , locations = [AST.Location 3 40] } in validate queryString `shouldBe` [expected] context "knownInputFieldNamesRule" $ it "rejects undefined input object fields" $ let queryString = "{\n\ \ findDog(complex: { favoriteCookieFlavor: \"Bacon\", name: \"Jack\" }) {\n\ \ name\n\ \ }\n\ \}" expected = Error { message = "Field \"favoriteCookieFlavor\" is not defined \ \by type \"DogData\"." , locations = [AST.Location 2 22] } in validate queryString `shouldBe` [expected] context "directivesInValidLocationsRule" $ it "rejects directives in invalid locations" $ let queryString = "query @skip(if: $foo) {\n\ \ dog {\n\ \ name\n\ \ }\n\ \}" expected = Error { message = "Directive \"@skip\" may not be used on QUERY." , locations = [AST.Location 1 7] } in validate queryString `shouldBe` [expected] context "overlappingFieldsCanBeMergedRule" $ do it "fails to merge fields of mismatching types" $ let queryString = "{\n\ \ dog {\n\ \ name: nickname\n\ \ name\n\ \ }\n\ \}" expected = Error { message = "Fields \"name\" conflict because \"nickname\" and \ \\"name\" are different fields. Use different \ \aliases on the fields to fetch both if this was \ \intentional." , locations = [AST.Location 3 5, AST.Location 4 5] } in validate queryString `shouldBe` [expected] it "fails if the arguments of the same field don't match" $ let queryString = "{\n\ \ dog {\n\ \ doesKnowCommand(dogCommand: SIT)\n\ \ doesKnowCommand(dogCommand: HEEL)\n\ \ }\n\ \}" expected = Error { message = "Fields \"doesKnowCommand\" conflict because they \ \have different arguments. Use different aliases \ \on the fields to fetch both if this was \ \intentional." , locations = [AST.Location 3 5, AST.Location 4 5] } in validate queryString `shouldBe` [expected] it "fails to merge same-named field and alias" $ let queryString = "{\n\ \ dog {\n\ \ doesKnowCommand(dogCommand: SIT)\n\ \ doesKnowCommand: isHouseTrained(atOtherHomes: true)\n\ \ }\n\ \}" expected = Error { message = "Fields \"doesKnowCommand\" conflict because \ \\"doesKnowCommand\" and \"isHouseTrained\" are \ \different fields. Use different aliases on the \ \fields to fetch both if this was intentional." , locations = [AST.Location 3 5, AST.Location 4 5] } in validate queryString `shouldBe` [expected] it "looks for fields after a successfully merged field pair" $ let queryString = "{\n\ \ dog {\n\ \ name\n\ \ doesKnowCommand(dogCommand: SIT)\n\ \ }\n\ \ dog {\n\ \ name\n\ \ doesKnowCommand: isHouseTrained(atOtherHomes: true)\n\ \ }\n\ \}" expected = Error { message = "Fields \"doesKnowCommand\" conflict because \ \\"doesKnowCommand\" and \"isHouseTrained\" are \ \different fields. Use different aliases on the \ \fields to fetch both if this was intentional." , locations = [AST.Location 4 5, AST.Location 8 5] } in validate queryString `shouldBe` [expected] context "possibleFragmentSpreadsRule" $ do it "rejects object inline spreads outside object scope" $ let queryString = "{\n\ \ dog {\n\ \ ... on Cat {\n\ \ meowVolume\n\ \ }\n\ \ }\n\ \}" expected = Error { message = "Fragment cannot be spread here as objects of type \ \\"Dog\" can never be of type \"Cat\"." , locations = [AST.Location 3 5] } in validate queryString `shouldBe` [expected] it "rejects object named spreads outside object scope" $ let queryString = "{\n\ \ dog {\n\ \ ... catInDogFragmentInvalid\n\ \ }\n\ \}\n\ \\n\ \fragment catInDogFragmentInvalid on Cat {\n\ \ meowVolume\n\ \}" expected = Error { message = "Fragment \"catInDogFragmentInvalid\" cannot be \ \spread here as objects of type \"Dog\" can never \ \be of type \"Cat\"." , locations = [AST.Location 3 5] } in validate queryString `shouldBe` [expected] context "providedRequiredInputFieldsRule" $ it "rejects missing required input fields" $ let queryString = "{\n\ \ findDog(complex: { name: null }) {\n\ \ name\n\ \ }\n\ \}" expected = Error { message = "Input field \"name\" of type \"DogData\" is \ \required, but it was not provided." , locations = [AST.Location 2 20] } in validate queryString `shouldBe` [expected] context "providedRequiredArgumentsRule" $ do it "checks for (non-)nullable arguments" $ let queryString = "{\n\ \ dog {\n\ \ doesKnowCommand(dogCommand: null)\n\ \ }\n\ \}" expected = Error { message = "Field \"doesKnowCommand\" argument \"dogCommand\" \ \of type \"DogCommand\" is required, but it was \ \not provided." , locations = [AST.Location 3 5] } in validate queryString `shouldBe` [expected] context "variablesInAllowedPositionRule" $ do it "rejects wrongly typed variable arguments" $ let queryString = "query dogCommandArgQuery($dogCommandArg: DogCommand) {\n\ \ dog {\n\ \ doesKnowCommand(dogCommand: $dogCommandArg)\n\ \ }\n\ \}" expected = Error { message = "Variable \"$dogCommandArg\" of type \ \\"DogCommand\" used in position expecting type \ \\"DogCommand!\"." , locations = [AST.Location 1 26] } in validate queryString `shouldBe` [expected] it "rejects wrongly typed variable arguments" $ let queryString = "query intCannotGoIntoBoolean($intArg: Int) {\n\ \ dog {\n\ \ isHouseTrained(atOtherHomes: $intArg)\n\ \ }\n\ \}" expected = Error { message = "Variable \"$intArg\" of type \"Int\" used in \ \position expecting type \"Boolean\"." , locations = [AST.Location 1 30] } in validate queryString `shouldBe` [expected] context "valuesOfCorrectTypeRule" $ do it "rejects values of incorrect types" $ let queryString = "{\n\ \ dog {\n\ \ isHouseTrained(atOtherHomes: 3)\n\ \ }\n\ \}" expected = Error { message = "Value 3 cannot be coerced to type \"Boolean\"." , locations = [AST.Location 3 34] } in validate queryString `shouldBe` [expected] it "uses the location of a single list value" $ let queryString = "{\n\ \ cat {\n\ \ doesKnowCommands(catCommands: [3])\n\ \ }\n\ \}" expected = Error { message = "Value 3 cannot be coerced to type \"CatCommand!\"." , locations = [AST.Location 3 36] } in validate queryString `shouldBe` [expected] it "validates input object properties once" $ let queryString = "{\n\ \ findDog(complex: { name: 3 }) {\n\ \ name\n\ \ }\n\ \}" expected = Error { message = "Value 3 cannot be coerced to type \"String!\"." , locations = [AST.Location 2 28] } in validate queryString `shouldBe` [expected] it "checks for required list members" $ let queryString = "{\n\ \ cat {\n\ \ doesKnowCommands(catCommands: [null])\n\ \ }\n\ \}" expected = Error { message = "List of non-null values of type \"CatCommand\" \ \cannot contain null values." , locations = [AST.Location 3 36] } in validate queryString `shouldBe` [expected]