func main() {
// Schema
fields := graphql.Fields{
"hello": &graphql.Field{
Type: graphql.String,
Resolve: func(p graphql.ResolveParams) interface{} {
return "world"
},
},
}
rootQuery := graphql.ObjectConfig{Name: "RootQuery", Fields: fields}
schemaConfig := graphql.SchemaConfig{Query: graphql.NewObject(rootQuery)}
schema, err := graphql.NewSchema(schemaConfig)
if err != nil {
log.Fatalf("failed to create new schema, error: %v", err)
}
// Query
query := `
{
hello
}
`
params := graphql.Params{Schema: schema, RequestString: query}
r := graphql.Do(params)
if len(r.Errors) > 0 {
log.Fatalf("failed to execute graphql operation, errors: %+v", r.Errors)
}
rJSON, _ := json.Marshal(r)
fmt.Printf("%s \n", rJSON) // {“data”:{“hello”:”world”}}
}
func testGraphql(test T, p graphql.Params, t *testing.T) {
result := graphql.Do(p)
if len(result.Errors) > 0 {
t.Fatalf("wrong result, unexpected errors: %v", result.Errors)
}
if !reflect.DeepEqual(result, test.Expected) {
t.Fatalf("wrong result, query: %v, graphql result diff: %v", test.Query, testutil.Diff(test.Expected, result))
}
}
func executeQuery(query string, schema graphql.Schema) *graphql.Result {
result := graphql.Do(graphql.Params{
Schema: schema,
RequestString: query,
})
if len(result.Errors) > 0 {
fmt.Printf("wrong result, unexpected errors: %v", result.Errors)
}
return result
}
func TestBasicGraphQLExample(t *testing.T) {
// taken from `graphql-js` README
helloFieldResolved := func(p graphql.ResolveParams) interface{} {
return "world"
}
schema, err := graphql.NewSchema(graphql.SchemaConfig{
Query: graphql.NewObject(graphql.ObjectConfig{
Name: "RootQueryType",
Fields: graphql.Fields{
"hello": &graphql.Field{
Description: "Returns `world`",
Type: graphql.String,
Resolve: helloFieldResolved,
},
},
}),
})
if err != nil {
t.Fatalf("wrong result, unexpected errors: %v", err.Error())
}
query := "{ hello }"
var expected interface{}
expected = map[string]interface{}{
"hello": "world",
}
result := graphql.Do(graphql.Params{
Schema: schema,
RequestString: query,
})
if len(result.Errors) > 0 {
t.Fatalf("wrong result, unexpected errors: %v", result.Errors)
}
if !reflect.DeepEqual(result.Data, expected) {
t.Fatalf("wrong result, query: %v, graphql result diff: %v", query, testutil.Diff(expected, result))
}
}
func TestResolveTypeOnUnionYieldsUsefulError(t *testing.T) {
humanType := graphql.NewObject(graphql.ObjectConfig{
Name: "Human",
Fields: graphql.Fields{
"name": &graphql.Field{
Type: graphql.String,
Resolve: func(p graphql.ResolveParams) interface{} {
if human, ok := p.Source.(*testHuman); ok {
return human.Name
}
return nil
},
},
},
})
dogType := graphql.NewObject(graphql.ObjectConfig{
Name: "Dog",
IsTypeOf: func(value interface{}, info graphql.ResolveInfo) bool {
_, ok := value.(*testDog)
return ok
},
Fields: graphql.Fields{
"name": &graphql.Field{
Type: graphql.String,
Resolve: func(p graphql.ResolveParams) interface{} {
if dog, ok := p.Source.(*testDog); ok {
return dog.Name
}
return nil
},
},
"woofs": &graphql.Field{
Type: graphql.Boolean,
Resolve: func(p graphql.ResolveParams) interface{} {
if dog, ok := p.Source.(*testDog); ok {
return dog.Woofs
}
return nil
},
},
},
})
catType := graphql.NewObject(graphql.ObjectConfig{
Name: "Cat",
IsTypeOf: func(value interface{}, info graphql.ResolveInfo) bool {
_, ok := value.(*testCat)
return ok
},
Fields: graphql.Fields{
"name": &graphql.Field{
Type: graphql.String,
Resolve: func(p graphql.ResolveParams) interface{} {
if cat, ok := p.Source.(*testCat); ok {
return cat.Name
}
return nil
},
},
"meows": &graphql.Field{
Type: graphql.Boolean,
Resolve: func(p graphql.ResolveParams) interface{} {
if cat, ok := p.Source.(*testCat); ok {
return cat.Meows
}
return nil
},
},
},
})
petType := graphql.NewUnion(graphql.UnionConfig{
Name: "Pet",
Types: []*graphql.Object{
dogType, catType,
},
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
},
})
schema, err := graphql.NewSchema(graphql.SchemaConfig{
Query: graphql.NewObject(graphql.ObjectConfig{
Name: "Query",
Fields: graphql.Fields{
"pets": &graphql.Field{
Type: graphql.NewList(petType),
Resolve: func(p graphql.ResolveParams) interface{} {
return []interface{}{
&testDog{"Odie", true},
&testCat{"Garfield", false},
&testHuman{"Jon"},
}
},
},
},
}),
})
if err != nil {
t.Fatalf("Error in schema %v", err.Error())
}
query := `{
pets {
name
... on Dog {
woofs
}
... on Cat {
meows
}
}
}`
expected := &graphql.Result{
Data: map[string]interface{}{
"pets": []interface{}{
map[string]interface{}{
"name": "Odie",
"woofs": bool(true),
},
map[string]interface{}{
"name": "Garfield",
"meows": bool(false),
},
nil,
},
},
Errors: []gqlerrors.FormattedError{
gqlerrors.FormattedError{
Message: `Runtime Object type "Human" is not a possible type for "Pet".`,
Locations: []location.SourceLocation{},
},
},
}
result := graphql.Do(graphql.Params{
Schema: schema,
RequestString: query,
})
if len(result.Errors) == 0 {
t.Fatalf("wrong result, expected errors: %v, got: %v", len(expected.Errors), len(result.Errors))
}
if !reflect.DeepEqual(expected, result) {
t.Fatalf("Unexpected result, Diff: %v", testutil.Diff(expected, result))
}
}
func TestIsTypeOfUsedToResolveRuntimeTypeForInterface(t *testing.T) {
petType := graphql.NewInterface(graphql.InterfaceConfig{
Name: "Pet",
Fields: graphql.Fields{
"name": &graphql.Field{
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.Fields{
"name": &graphql.Field{
Type: graphql.String,
Resolve: func(p graphql.ResolveParams) interface{} {
if dog, ok := p.Source.(*testDog); ok {
return dog.Name
}
return nil
},
},
"woofs": &graphql.Field{
Type: graphql.Boolean,
Resolve: func(p graphql.ResolveParams) 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.Fields{
"name": &graphql.Field{
Type: graphql.String,
Resolve: func(p graphql.ResolveParams) interface{} {
if cat, ok := p.Source.(*testCat); ok {
return cat.Name
}
return nil
},
},
"meows": &graphql.Field{
Type: graphql.Boolean,
Resolve: func(p graphql.ResolveParams) 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.Fields{
"pets": &graphql.Field{
Type: graphql.NewList(petType),
Resolve: func(p graphql.ResolveParams) 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 {
meows
}
}
}`
expected := &graphql.Result{
Data: map[string]interface{}{
"pets": []interface{}{
map[string]interface{}{
"name": "Odie",
"woofs": bool(true),
},
map[string]interface{}{
"name": "Garfield",
"meows": bool(false),
},
},
},
Errors: nil,
}
result := graphql.Do(graphql.Params{
Schema: schema,
RequestString: query,
})
if len(result.Errors) != 0 {
t.Fatalf("wrong result, unexpected errors: %v", result.Errors)
}
if !reflect.DeepEqual(expected, result) {
t.Fatalf("Unexpected result, Diff: %v", testutil.Diff(expected, result))
}
}
func g(t *testing.T, p graphql.Params) *graphql.Result {
return graphql.Do(p)
}