func TestTypeSystem_ObjectInterfacesMustBeArray_AcceptsAnObjectTypeWithArrayInterfaces(t *testing.T) {
	anotherInterfaceType := graphql.NewInterface(graphql.InterfaceConfig{
		Name: "AnotherInterface",
		ResolveType: func(p graphql.ResolveTypeParams) *graphql.Object {
			return nil
		},
		Fields: graphql.Fields{
			"f": &graphql.Field{
				Type: graphql.String,
			},
		},
	})
	_, err := schemaWithFieldType(graphql.NewObject(graphql.ObjectConfig{
		Name: "SomeObject",
		Interfaces: (graphql.InterfacesThunk)(func() []*graphql.Interface {
			return []*graphql.Interface{anotherInterfaceType}
		}),
		Fields: graphql.Fields{
			"f": &graphql.Field{
				Type: graphql.String,
			},
		},
	}))
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
}

func TestTypeSystem_InterfaceTypesMustBeResolvable_AcceptsAnInterfaceTypeDefiningResolveType(t *testing.T) {

	anotherInterfaceType := graphql.NewInterface(graphql.InterfaceConfig{
		Name: "AnotherInterface",
		ResolveType: func(p graphql.ResolveTypeParams) *graphql.Object {
			return nil
		},
		Fields: graphql.Fields{
			"f": &graphql.Field{
				Type: graphql.String,
			},
		},
	})
	_, err := schemaWithFieldType(graphql.NewObject(graphql.ObjectConfig{
		Name:       "SomeObject",
		Interfaces: []*graphql.Interface{anotherInterfaceType},
		Fields: graphql.Fields{
			"f": &graphql.Field{
				Type: graphql.String,
			},
		},
	}))
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
}

func TestTypeSystem_ObjectsMustAdhereToInterfaceTheyImplement_RejectsAnObjectWithASupersetNullableInterfaceFieldType(t *testing.T) {
	anotherInterface := graphql.NewInterface(graphql.InterfaceConfig{
		Name: "AnotherInterface",
		ResolveType: func(p graphql.ResolveTypeParams) *graphql.Object {
			return nil
		},
		Fields: graphql.Fields{
			"field": &graphql.Field{
				Type: graphql.NewNonNull(graphql.String),
			},
		},
	})
	anotherObject := graphql.NewObject(graphql.ObjectConfig{
		Name:       "AnotherObject",
		Interfaces: []*graphql.Interface{anotherInterface},
		Fields: graphql.Fields{
			"field": &graphql.Field{
				Type: graphql.String,
			},
		},
	})
	_, err := schemaWithFieldType(anotherObject)
	expectedError := `AnotherInterface.field expects type "String!" but AnotherObject.field provides type "String".`
	if err == nil || err.Error() != expectedError {
		t.Fatalf("Expected error: %v, got %v", expectedError, err)
	}
}

func TestTypeSystem_ObjectsMustAdhereToInterfaceTheyImplement_RejectsAnObjectMissingAnInterfaceArgument(t *testing.T) {
	anotherInterface := graphql.NewInterface(graphql.InterfaceConfig{
		Name: "AnotherInterface",
		ResolveType: func(value interface{}, info graphql.ResolveInfo) *graphql.Object {
			return nil
		},
		Fields: graphql.FieldConfigMap{
			"field": &graphql.FieldConfig{
				Type: graphql.String,
				Args: graphql.FieldConfigArgument{
					"input": &graphql.ArgumentConfig{
						Type: graphql.String,
					},
				},
			},
		},
	})
	anotherObject := graphql.NewObject(graphql.ObjectConfig{
		Name:       "AnotherObject",
		Interfaces: []*graphql.Interface{anotherInterface},
		Fields: graphql.FieldConfigMap{
			"field": &graphql.FieldConfig{
				Type: graphql.String,
			},
		},
	})
	_, err := schemaWithObjectFieldOfType(anotherObject)
	expectedError := `AnotherInterface.field expects argument "input" but AnotherObject.field does not provide it.`
	if err == nil || err.Error() != expectedError {
		t.Fatalf("Expected error: %v, got %v", expectedError, err)
	}
}

func TestTypeSystem_ObjectsMustAdhereToInterfaceTheyImplement_AcceptsAnObjectWithAnEquivalentlyModifiedInterfaceField(t *testing.T) {
	anotherInterface := graphql.NewInterface(graphql.InterfaceConfig{
		Name: "AnotherInterface",
		ResolveType: func(value interface{}, info graphql.ResolveInfo) *graphql.Object {
			return nil
		},
		Fields: graphql.FieldConfigMap{
			"field": &graphql.FieldConfig{
				Type: graphql.NewNonNull(graphql.NewList(graphql.String)),
			},
		},
	})
	anotherObject := graphql.NewObject(graphql.ObjectConfig{
		Name:       "AnotherObject",
		Interfaces: []*graphql.Interface{anotherInterface},
		Fields: graphql.FieldConfigMap{
			"field": &graphql.FieldConfig{
				Type: graphql.NewNonNull(graphql.NewList(graphql.String)),
			},
		},
	})
	_, err := schemaWithObjectFieldOfType(anotherObject)
	if err != nil {
		t.Fatalf(`unexpected error: %v for type "%v"`, err, anotherObject)
	}
}

func TestTypeSystem_ObjectsCanOnlyImplementInterfaces_AcceptsAnObjectImplementingAnInterface(t *testing.T) {
	anotherInterfaceType := graphql.NewInterface(graphql.InterfaceConfig{
		Name: "AnotherInterface",
		ResolveType: func(value interface{}, info graphql.ResolveInfo) *graphql.Object {
			return nil
		},
		Fields: graphql.FieldConfigMap{
			"f": &graphql.FieldConfig{
				Type: graphql.String,
			},
		},
	})
	_, err := schemaWithObjectImplementingType(anotherInterfaceType)
	if err != nil {
		t.Fatalf(`unexpected error: %v"`, err)
	}
}

func TestTypeSystem_DefinitionExample_IncludesInterfacesThunkSubtypesInTheTypeMap(t *testing.T) {

	someInterface := graphql.NewInterface(graphql.InterfaceConfig{
		Name: "SomeInterface",
		Fields: graphql.Fields{
			"f": &graphql.Field{
				Type: graphql.Int,
			},
		},
	})

	someSubType := graphql.NewObject(graphql.ObjectConfig{
		Name: "SomeSubtype",
		Fields: graphql.Fields{
			"f": &graphql.Field{
				Type: graphql.Int,
			},
		},
		Interfaces: (graphql.InterfacesThunk)(func() []*graphql.Interface {
			return []*graphql.Interface{someInterface}
		}),
		IsTypeOf: func(p graphql.IsTypeOfParams) bool {
			return true
		},
	})
	schema, err := graphql.NewSchema(graphql.SchemaConfig{
		Query: graphql.NewObject(graphql.ObjectConfig{
			Name: "Query",
			Fields: graphql.Fields{
				"iface": &graphql.Field{
					Type: someInterface,
				},
			},
		}),
		Types: []graphql.Type{someSubType},
	})
	if err != nil {
		t.Fatalf("unexpected error, got: %v", err)
	}
	if schema.Type("SomeSubtype") != someSubType {
		t.Fatalf(`schema.GetType("SomeSubtype") expected to equal someSubType, got: %v`, schema.Type("SomeSubtype"))
	}
}

func schemaWithInterfaceFieldOfType(ttype graphql.Type) (graphql.Schema, error) {

	badInterfaceType := graphql.NewInterface(graphql.InterfaceConfig{
		Name: "BadInterface",
		Fields: graphql.FieldConfigMap{
			"badField": &graphql.FieldConfig{
				Type: ttype,
			},
		},
	})
	return graphql.NewSchema(graphql.SchemaConfig{
		Query: graphql.NewObject(graphql.ObjectConfig{
			Name: "Query",
			Fields: graphql.FieldConfigMap{
				"f": &graphql.FieldConfig{
					Type: badInterfaceType,
				},
			},
		}),
	})
}

/*
 Given a function to map from an ID to an underlying object, and a function
 to map from an underlying object to the concrete GraphQLObjectType it
 corresponds to, constructs a `Node` interface that objects can implement,
 and a field config for a `node` root field.

 If the typeResolver is omitted, object resolution on the interface will be
 handled with the `isTypeOf` method on object types, as with any GraphQL
interface without a provided `resolveType` method.
*/
func NewNodeDefinitions(config NodeDefinitionsConfig) *NodeDefinitions {
	nodeInterface := graphql.NewInterface(graphql.InterfaceConfig{
		Name:        "Node",
		Description: "An object with an ID",
		Fields: graphql.FieldConfigMap{
			"id": &graphql.FieldConfig{
				Type:        graphql.NewNonNull(graphql.ID),
				Description: "The id of the object",
			},
		},
		ResolveType: config.TypeResolve,
	})

	nodeField := &graphql.FieldConfig{
		Name:        "Node",
		Description: "Fetches an object given its ID",
		Type:        nodeInterface,
		Args: graphql.FieldConfigArgument{
			"id": &graphql.ArgumentConfig{
				Type:        graphql.NewNonNull(graphql.ID),
				Description: "The ID of an object",
			},
		},
		Resolve: func(p graphql.GQLFRParams) interface{} {
			if config.IDFetcher == nil {
				return nil
			}
			id := ""
			if iid, ok := p.Args["id"]; ok {
				id = fmt.Sprintf("%v", iid)
			}
			fetchedID := config.IDFetcher(id, p.Info)
			return fetchedID
		},
	}
	return &NodeDefinitions{
		NodeInterface: nodeInterface,
		NodeField:     nodeField,
	}
}

func TestTypeSystem_DefinitionExample_IncludesInterfacesSubTypesInTheTypeMap(t *testing.T) {

	someInterface := graphql.NewInterface(graphql.InterfaceConfig{
		Name: "SomeInterface",
		Fields: graphql.FieldConfigMap{
			"f": &graphql.FieldConfig{
				Type: graphql.Int,
			},
		},
	})

	someSubType := graphql.NewObject(graphql.ObjectConfig{
		Name: "SomeSubtype",
		Fields: graphql.FieldConfigMap{
			"f": &graphql.FieldConfig{
				Type: graphql.Int,
			},
		},
		Interfaces: []*graphql.Interface{someInterface},
		IsTypeOf: func(value interface{}, info graphql.ResolveInfo) bool {
			return true
		},
	})
	schema, err := graphql.NewSchema(graphql.SchemaConfig{
		Query: graphql.NewObject(graphql.ObjectConfig{
			Name: "Query",
			Fields: graphql.FieldConfigMap{
				"iface": &graphql.FieldConfig{
					Type: someInterface,
				},
			},
		}),
	})
	if err != nil {
		t.Fatalf("unexpected error, got: %v", err)
	}
	if schema.GetType("SomeSubtype") != someSubType {
		t.Fatalf(`schema.GetType("SomeSubtype") expected to equal someSubType, got: %v`, schema.GetType("SomeSubtype"))
	}
}

func TestUnionIntersectionTypes_GetsExecutionInfoInResolver(t *testing.T) {

	var encounteredContextValue string
	var encounteredSchema graphql.Schema
	var encounteredRootValue string
	var personType2 *graphql.Object

	namedType2 := graphql.NewInterface(graphql.InterfaceConfig{
		Name: "Named",
		Fields: graphql.Fields{
			"name": &graphql.Field{
				Type: graphql.String,
			},
		},
		ResolveType: func(p graphql.ResolveTypeParams) *graphql.Object {
			encounteredSchema = p.Info.Schema
			encounteredContextValue, _ = p.Context.Value("authToken").(string)
			encounteredRootValue = p.Info.RootValue.(*testPerson).Name
			return personType2
		},
	})

	personType2 = graphql.NewObject(graphql.ObjectConfig{
		Name: "Person",
		Interfaces: []*graphql.Interface{
			namedType2,
		},
		Fields: graphql.Fields{
			"name": &graphql.Field{
				Type: graphql.String,
			},
			"friends": &graphql.Field{
				Type: graphql.NewList(namedType2),
			},
		},
	})

	schema2, _ := graphql.NewSchema(graphql.SchemaConfig{
		Query: personType2,
	})

	john2 := &testPerson{
		Name: "John",
		Friends: []testNamedType{
			liz,
		},
	}

	doc := `{ name, friends { name } }`
	expected := &graphql.Result{
		Data: map[string]interface{}{
			"name": "John",
			"friends": []interface{}{
				map[string]interface{}{
					"name": "Liz",
				},
			},
		},
	}
	// parse query
	ast := testutil.TestParse(t, doc)

	// create context
	ctx := context.Background()
	ctx = context.WithValue(ctx, "authToken", "contextStringValue123")

	// execute
	ep := graphql.ExecuteParams{
		Schema:  schema2,
		AST:     ast,
		Root:    john2,
		Context: ctx,
	}
	result := testutil.TestExecute(t, ep)

	if !reflect.DeepEqual(expected, result) {
		t.Fatalf("Unexpected result, Diff: %v", testutil.Diff(expected, result))
	}
	if !reflect.DeepEqual("contextStringValue123", encounteredContextValue) {
		t.Fatalf("Unexpected result, Diff: %v", testutil.Diff("contextStringValue123", encounteredContextValue))
	}
	if !reflect.DeepEqual("John", encounteredRootValue) {
		t.Fatalf("Unexpected result, Diff: %v", testutil.Diff("John", encounteredRootValue))
	}
	if !reflect.DeepEqual(schema2, encounteredSchema) {
		t.Fatalf("Unexpected result, Diff: %v", testutil.Diff(schema2, encounteredSchema))
	}
}

func TestResolveTypeOnInterfaceYieldsUsefulError(t *testing.T) {

	var dogType *graphql.Object
	var catType *graphql.Object
	var humanType *graphql.Object
	petType := graphql.NewInterface(graphql.InterfaceConfig{
		Name: "Pet",
		Fields: graphql.FieldConfigMap{
			"name": &graphql.FieldConfig{
				Type: graphql.String,
			},
		},
		ResolveType: func(value interface{}, info graphql.ResolveInfo) *graphql.Object {
			if _, ok := value.(*testCat); ok {
				return catType
			}
			if _, ok := value.(*testDog); ok {
				return dogType
			}
			if _, ok := value.(*testHuman); ok {
				return humanType
			}
			return nil
		},
	})

	humanType = graphql.NewObject(graphql.ObjectConfig{
		Name: "Human",
		Fields: graphql.FieldConfigMap{
			"name": &graphql.FieldConfig{
				Type: graphql.String,
				Resolve: func(p graphql.GQLFRParams) interface{} {
					if human, ok := p.Source.(*testHuman); ok {
						return human.Name
					}
					return nil
				},
			},
		},
	})
	dogType = graphql.NewObject(graphql.ObjectConfig{
		Name: "Dog",
		Interfaces: []*graphql.Interface{
			petType,
		},
		IsTypeOf: func(value interface{}, info graphql.ResolveInfo) bool {
			_, ok := value.(*testDog)
			return ok
		},
		Fields: graphql.FieldConfigMap{
			"name": &graphql.FieldConfig{
				Type: graphql.String,
				Resolve: func(p graphql.GQLFRParams) interface{} {
					if dog, ok := p.Source.(*testDog); ok {
						return dog.Name
					}
					return nil
				},
			},
			"woofs": &graphql.FieldConfig{
				Type: graphql.Boolean,
				Resolve: func(p graphql.GQLFRParams) interface{} {
					if dog, ok := p.Source.(*testDog); ok {
						return dog.Woofs
					}
					return nil
				},
			},
		},
	})
	catType = graphql.NewObject(graphql.ObjectConfig{
		Name: "Cat",
		Interfaces: []*graphql.Interface{
			petType,
		},
		IsTypeOf: func(value interface{}, info graphql.ResolveInfo) bool {
			_, ok := value.(*testCat)
			return ok
		},
		Fields: graphql.FieldConfigMap{
			"name": &graphql.FieldConfig{
				Type: graphql.String,
				Resolve: func(p graphql.GQLFRParams) interface{} {
					if cat, ok := p.Source.(*testCat); ok {
						return cat.Name
					}
					return nil
				},
			},
			"meows": &graphql.FieldConfig{
				Type: graphql.Boolean,
				Resolve: func(p graphql.GQLFRParams) interface{} {
					if cat, ok := p.Source.(*testCat); ok {
						return cat.Meows
					}
					return nil
				},
			},
		},
	})
//.........这里部分代码省略.........

func TestIsTypeOfUsedToResolveRuntimeTypeForInterface(t *testing.T) {

	petType := graphql.NewInterface(graphql.InterfaceConfig{
		Name: "Pet",
		Fields: graphql.FieldConfigMap{
			"name": &graphql.FieldConfig{
				Type: graphql.String,
			},
		},
	})

	// ie declare that Dog belongs to Pet interface
	_ = graphql.NewObject(graphql.ObjectConfig{
		Name: "Dog",
		Interfaces: []*graphql.Interface{
			petType,
		},
		IsTypeOf: func(value interface{}, info graphql.ResolveInfo) bool {
			_, ok := value.(*testDog)
			return ok
		},
		Fields: graphql.FieldConfigMap{
			"name": &graphql.FieldConfig{
				Type: graphql.String,
				Resolve: func(p graphql.GQLFRParams) interface{} {
					if dog, ok := p.Source.(*testDog); ok {
						return dog.Name
					}
					return nil
				},
			},
			"woofs": &graphql.FieldConfig{
				Type: graphql.Boolean,
				Resolve: func(p graphql.GQLFRParams) interface{} {
					if dog, ok := p.Source.(*testDog); ok {
						return dog.Woofs
					}
					return nil
				},
			},
		},
	})
	// ie declare that Cat belongs to Pet interface
	_ = graphql.NewObject(graphql.ObjectConfig{
		Name: "Cat",
		Interfaces: []*graphql.Interface{
			petType,
		},
		IsTypeOf: func(value interface{}, info graphql.ResolveInfo) bool {
			_, ok := value.(*testCat)
			return ok
		},
		Fields: graphql.FieldConfigMap{
			"name": &graphql.FieldConfig{
				Type: graphql.String,
				Resolve: func(p graphql.GQLFRParams) interface{} {
					if cat, ok := p.Source.(*testCat); ok {
						return cat.Name
					}
					return nil
				},
			},
			"meows": &graphql.FieldConfig{
				Type: graphql.Boolean,
				Resolve: func(p graphql.GQLFRParams) interface{} {
					if cat, ok := p.Source.(*testCat); ok {
						return cat.Meows
					}
					return nil
				},
			},
		},
	})
	schema, err := graphql.NewSchema(graphql.SchemaConfig{
		Query: graphql.NewObject(graphql.ObjectConfig{
			Name: "Query",
			Fields: graphql.FieldConfigMap{
				"pets": &graphql.FieldConfig{
					Type: graphql.NewList(petType),
					Resolve: func(p graphql.GQLFRParams) interface{} {
						return []interface{}{
							&testDog{"Odie", true},
							&testCat{"Garfield", false},
						}
					},
				},
			},
		}),
	})
	if err != nil {
		t.Fatalf("Error in schema %v", err.Error())
	}

	query := `{
      pets {
        name
        ... on Dog {
          woofs
        }
        ... on Cat {
//.........这里部分代码省略.........

func init() {
	Luke = StarWarsChar{
		ID:         "1000",
		Name:       "Luke Skywalker",
		AppearsIn:  []int{4, 5, 6},
		HomePlanet: "Tatooine",
	}
	Vader = StarWarsChar{
		ID:         "1001",
		Name:       "Darth Vader",
		AppearsIn:  []int{4, 5, 6},
		HomePlanet: "Tatooine",
	}
	Han = StarWarsChar{
		ID:        "1002",
		Name:      "Han Solo",
		AppearsIn: []int{4, 5, 6},
	}
	Leia = StarWarsChar{
		ID:         "1003",
		Name:       "Leia Organa",
		AppearsIn:  []int{4, 5, 6},
		HomePlanet: "Alderaa",
	}
	Tarkin = StarWarsChar{
		ID:        "1004",
		Name:      "Wilhuff Tarkin",
		AppearsIn: []int{4},
	}
	Threepio = StarWarsChar{
		ID:              "2000",
		Name:            "C-3PO",
		AppearsIn:       []int{4, 5, 6},
		PrimaryFunction: "Protocol",
	}
	Artoo = StarWarsChar{
		ID:              "2001",
		Name:            "R2-D2",
		AppearsIn:       []int{4, 5, 6},
		PrimaryFunction: "Astromech",
	}
	Luke.Friends = append(Luke.Friends, []StarWarsChar{Han, Leia, Threepio, Artoo}...)
	Vader.Friends = append(Luke.Friends, []StarWarsChar{Tarkin}...)
	Han.Friends = append(Han.Friends, []StarWarsChar{Luke, Leia, Artoo}...)
	Leia.Friends = append(Leia.Friends, []StarWarsChar{Luke, Han, Threepio, Artoo}...)
	Tarkin.Friends = append(Tarkin.Friends, []StarWarsChar{Vader}...)
	Threepio.Friends = append(Threepio.Friends, []StarWarsChar{Luke, Han, Leia, Artoo}...)
	Artoo.Friends = append(Artoo.Friends, []StarWarsChar{Luke, Han, Leia}...)
	HumanData = map[int]StarWarsChar{
		1000: Luke,
		1001: Vader,
		1002: Han,
		1003: Leia,
		1004: Tarkin,
	}
	DroidData = map[int]StarWarsChar{
		2000: Threepio,
		2001: Artoo,
	}

	episodeEnum := graphql.NewEnum(graphql.EnumConfig{
		Name:        "Episode",
		Description: "One of the films in the Star Wars Trilogy",
		Values: graphql.EnumValueConfigMap{
			"NEWHOPE": &graphql.EnumValueConfig{
				Value:       4,
				Description: "Released in 1977.",
			},
			"EMPIRE": &graphql.EnumValueConfig{
				Value:       5,
				Description: "Released in 1980.",
			},
			"JEDI": &graphql.EnumValueConfig{
				Value:       6,
				Description: "Released in 1983.",
			},
		},
	})

	characterInterface := graphql.NewInterface(graphql.InterfaceConfig{
		Name:        "Character",
		Description: "A character in the Star Wars Trilogy",
		Fields: graphql.Fields{
			"id": &graphql.Field{
				Type:        graphql.NewNonNull(graphql.String),
				Description: "The id of the character.",
			},
			"name": &graphql.Field{
				Type:        graphql.String,
				Description: "The name of the character.",
			},
			"appearsIn": &graphql.Field{
				Type:        graphql.NewList(episodeEnum),
				Description: "Which movies they appear in.",
			},
		},
		ResolveType: func(p graphql.ResolveTypeParams) *graphql.Object {
			if character, ok := p.Value.(StarWarsChar); ok {
				id, _ := strconv.Atoi(character.ID)
				human := GetHuman(id)
//.........这里部分代码省略.........

func TestUnionIntersectionTypes_GetsExecutionInfoInResolver(t *testing.T) {

	var encounteredSchema *graphql.Schema
	var encounteredRootValue interface{}

	var personType2 *graphql.Object

	namedType2 := graphql.NewInterface(graphql.InterfaceConfig{
		Name: "Named",
		Fields: graphql.FieldConfigMap{
			"name": &graphql.FieldConfig{
				Type: graphql.String,
			},
		},
		ResolveType: func(value interface{}, info graphql.ResolveInfo) *graphql.Object {
			encounteredSchema = &info.Schema
			encounteredRootValue = info.RootValue
			return personType2
		},
	})

	personType2 = graphql.NewObject(graphql.ObjectConfig{
		Name: "Person",
		Interfaces: []*graphql.Interface{
			namedType2,
		},
		Fields: graphql.FieldConfigMap{
			"name": &graphql.FieldConfig{
				Type: graphql.String,
			},
			"friends": &graphql.FieldConfig{
				Type: graphql.NewList(namedType2),
			},
		},
	})

	schema2, _ := graphql.NewSchema(graphql.SchemaConfig{
		Query: personType2,
	})

	john2 := &testPerson{
		Name: "John",
		Friends: []testNamedType{
			liz,
		},
	}

	doc := `{ name, friends { name } }`
	expected := &graphql.Result{
		Data: map[string]interface{}{
			"name": "John",
			"friends": []interface{}{
				map[string]interface{}{
					"name": "Liz",
				},
			},
		},
	}
	// parse query
	ast := testutil.TestParse(t, doc)

	// execute
	ep := graphql.ExecuteParams{
		Schema: schema2,
		AST:    ast,
		Root:   john2,
	}
	result := testutil.TestExecute(t, ep)
	if len(result.Errors) != len(expected.Errors) {
		t.Fatalf("Unexpected errors, Diff: %v", testutil.Diff(expected.Errors, result.Errors))
	}
	if !reflect.DeepEqual(expected, result) {
		t.Fatalf("Unexpected result, Diff: %v", testutil.Diff(expected, result))
	}
}

type testCat2 struct {
	Name  string `json:"name"`
	Meows bool   `json:"meows"`
}

type testPerson struct {
	Name    string          `json:"name"`
	Pets    []testPet       `json:"pets"`
	Friends []testNamedType `json:"friends"`
}

var namedType = graphql.NewInterface(graphql.InterfaceConfig{
	Name: "Named",
	Fields: graphql.Fields{
		"name": &graphql.Field{
			Type: graphql.String,
		},
	},
})
var dogType = graphql.NewObject(graphql.ObjectConfig{
	Name: "Dog",
	Interfaces: []*graphql.Interface{
		namedType,
	},
	Fields: graphql.Fields{
		"name": &graphql.Field{
			Type: graphql.String,
		},
		"barks": &graphql.Field{
			Type: graphql.Boolean,
		},

				"id": &graphql.ArgumentConfig{
					Type: graphql.String,
				},
			},
		},
	},
})

var objectType = graphql.NewObject(graphql.ObjectConfig{
	Name: "Object",
	IsTypeOf: func(p graphql.IsTypeOfParams) bool {
		return true
	},
})
var interfaceType = graphql.NewInterface(graphql.InterfaceConfig{
	Name: "Interface",
})
var unionType = graphql.NewUnion(graphql.UnionConfig{
	Name: "Union",
	Types: []*graphql.Object{
		objectType,
	},
})
var enumType = graphql.NewEnum(graphql.EnumConfig{
	Name: "Enum",
	Values: graphql.EnumValueConfigMap{
		"foo": &graphql.EnumValueConfig{},
	},
})
var inputObjectType = graphql.NewInputObject(graphql.InputObjectConfig{
	Name: "InputObject",

func init() {

	var beingInterface = graphql.NewInterface(graphql.InterfaceConfig{
		Name: "Being",
		Fields: graphql.Fields{
			"name": &graphql.Field{
				Type: graphql.String,
				Args: graphql.FieldConfigArgument{
					"surname": &graphql.ArgumentConfig{
						Type: graphql.Boolean,
					},
				},
			},
		},
	})
	var petInterface = graphql.NewInterface(graphql.InterfaceConfig{
		Name: "Pet",
		Fields: graphql.Fields{
			"name": &graphql.Field{
				Type: graphql.String,
				Args: graphql.FieldConfigArgument{
					"surname": &graphql.ArgumentConfig{
						Type: graphql.Boolean,
					},
				},
			},
		},
	})
	var dogCommandEnum = graphql.NewEnum(graphql.EnumConfig{
		Name: "DogCommand",
		Values: graphql.EnumValueConfigMap{
			"SIT": &graphql.EnumValueConfig{
				Value: 0,
			},
			"HEEL": &graphql.EnumValueConfig{
				Value: 1,
			},
			"DOWN": &graphql.EnumValueConfig{
				Value: 2,
			},
		},
	})
	var dogType = graphql.NewObject(graphql.ObjectConfig{
		Name: "Dog",
		IsTypeOf: func(value interface{}, info graphql.ResolveInfo) bool {
			return true
		},
		Fields: graphql.Fields{
			"name": &graphql.Field{
				Type: graphql.String,
				Args: graphql.FieldConfigArgument{
					"surname": &graphql.ArgumentConfig{
						Type: graphql.Boolean,
					},
				},
			},
			"nickname": &graphql.Field{
				Type: graphql.String,
			},
			"barkVolume": &graphql.Field{
				Type: graphql.Int,
			},
			"barks": &graphql.Field{
				Type: graphql.Boolean,
			},
			"doesKnowCommand": &graphql.Field{
				Type: graphql.Boolean,
				Args: graphql.FieldConfigArgument{
					"dogCommand": &graphql.ArgumentConfig{
						Type: dogCommandEnum,
					},
				},
			},
			"isHousetrained": &graphql.Field{
				Type: graphql.Boolean,
				Args: graphql.FieldConfigArgument{
					"atOtherHomes": &graphql.ArgumentConfig{
						Type:         graphql.Boolean,
						DefaultValue: true,
					},
				},
			},
			"isAtLocation": &graphql.Field{
				Type: graphql.Boolean,
				Args: graphql.FieldConfigArgument{
					"x": &graphql.ArgumentConfig{
						Type: graphql.Int,
					},
					"y": &graphql.ArgumentConfig{
						Type: graphql.Int,
					},
				},
			},
		},
		Interfaces: []*graphql.Interface{
			beingInterface,
			petInterface,
		},
	})
	var furColorEnum = graphql.NewEnum(graphql.EnumConfig{
//.........这里部分代码省略.........