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introspection_test.go
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introspection_test.go
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package graphql
import (
"bytes"
"context"
_ "embed"
"encoding/json"
"errors"
"fmt"
"net/http"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/vektah/gqlparser/v2"
"github.com/vektah/gqlparser/v2/ast"
"github.com/vektah/gqlparser/v2/formatter"
)
func TestIntrospectAPI(t *testing.T) {
schema, err := IntrospectAPI(&mockJSONQueryer{
JSONResult: `{
"__schema": {
"queryType": {
"name": "Query"
},
"directives": [
{
"name": "deprecated",
"args": [
{"name": "reason"}
]
}
]
}
}`,
})
assert.NoError(t, err)
assert.Equal(t, &ast.Schema{
Types: map[string]*ast.Definition{},
Directives: map[string]*ast.DirectiveDefinition{
"deprecated": {
Name: "deprecated",
Arguments: ast.ArgumentDefinitionList{
{
Name: "reason",
Type: &ast.Type{
Position: &ast.Position{},
},
},
},
Locations: []ast.DirectiveLocation{},
Position: &ast.Position{
Src: &ast.Source{BuiltIn: true},
},
},
},
PossibleTypes: map[string][]*ast.Definition{},
Implements: map[string][]*ast.Definition{},
}, schema)
}
func TestIntrospectAPI_union(t *testing.T) {
schema, err := IntrospectAPI(&mockJSONQueryer{
JSONResult: `{
"__schema": {
"queryType": {
"name": "Query"
},
"types": [
{
"name": "Subtype1",
"kind": "OBJECT"
},
{
"name": "Subtype2",
"kind": "OBJECT"
},
{
"name": "TypeA",
"kind": "UNION",
"possibleTypes": [
{ "name": "Subtype1" },
{ "name": "Subtype2" }
]
}
]
}
}`,
})
assert.NoError(t, err)
var (
expectTypeA = &ast.Definition{
Name: "TypeA",
Kind: "UNION",
Types: []string{"Subtype1", "Subtype2"},
Fields: ast.FieldList{},
}
expectSubtype1 = &ast.Definition{
Name: "Subtype1",
Kind: "OBJECT",
Fields: ast.FieldList{},
}
expectSubtype2 = &ast.Definition{
Name: "Subtype2",
Kind: "OBJECT",
Fields: ast.FieldList{},
}
)
assert.Equal(t, &ast.Schema{
Directives: map[string]*ast.DirectiveDefinition{},
Types: map[string]*ast.Definition{
"TypeA": expectTypeA,
"Subtype1": expectSubtype1,
"Subtype2": expectSubtype2,
},
PossibleTypes: map[string][]*ast.Definition{
"TypeA": {
expectSubtype1,
expectSubtype2,
},
"Subtype1": {
expectSubtype1,
},
"Subtype2": {
expectSubtype2,
},
},
Implements: map[string][]*ast.Definition{
"Subtype1": {expectSubtype1, expectTypeA},
"Subtype2": {expectSubtype2, expectTypeA},
"TypeA": {expectTypeA},
},
}, schema)
}
// mockJSONQueryer unmarshals the internal JSONResult into the receiver. Simulates the real queryer, just a bit.
type mockJSONQueryer struct {
JSONResult string
}
func (q *mockJSONQueryer) Query(ctx context.Context, input *QueryInput, receiver interface{}) error {
return json.Unmarshal([]byte(q.JSONResult), receiver)
}
func TestIntrospectQuery_savesQueryType(t *testing.T) {
// introspect the api with a known response
schema, err := IntrospectAPI(&MockSuccessQueryer{
IntrospectionQueryResult{
Schema: &IntrospectionQuerySchema{
QueryType: IntrospectionQueryRootType{
Name: "Query",
},
Types: []IntrospectionQueryFullType{
{
Kind: "OBJECT",
Name: "Query",
Fields: []IntrospectionQueryFullTypeField{
{
Name: "Hello",
Type: IntrospectionTypeRef{
Kind: "SCALAR",
},
},
},
},
},
},
},
})
// if something went wrong
if err != nil {
t.Error(err.Error())
return
}
// make sure we got a schema back
if schema == nil {
t.Error("Received nil schema")
return
}
if schema.Query == nil {
t.Error("Query was nil")
return
}
// make sure the query type has the right name
assert.Equal(t, "Query", schema.Query.Name)
}
func TestIntrospectQuery_savesMutationType(t *testing.T) {
// introspect the api with a known response
schema, err := IntrospectAPI(&MockSuccessQueryer{
IntrospectionQueryResult{
Schema: &IntrospectionQuerySchema{
QueryType: IntrospectionQueryRootType{
Name: "Query",
},
MutationType: &IntrospectionQueryRootType{
Name: "Mutation",
},
Types: []IntrospectionQueryFullType{
{
Kind: "OBJECT",
Name: "Mutation",
Fields: []IntrospectionQueryFullTypeField{
{
Name: "Hello",
Type: IntrospectionTypeRef{
Kind: "SCALAR",
},
},
},
},
},
},
},
})
// if something went wrong
if err != nil {
t.Error(err.Error())
return
}
// make sure we got a schema back
if schema == nil {
t.Error("Received nil schema")
return
}
if schema.Mutation == nil {
t.Error("Mutation was nil")
return
}
// make sure the query type has the right name
assert.Equal(t, "Mutation", schema.Mutation.Name)
}
func TestIntrospectQuery_savesSubscriptionType(t *testing.T) {
// introspect the api with a known response
schema, err := IntrospectAPI(&MockSuccessQueryer{
IntrospectionQueryResult{
Schema: &IntrospectionQuerySchema{
QueryType: IntrospectionQueryRootType{
Name: "Query",
},
SubscriptionType: &IntrospectionQueryRootType{
Name: "Subscription",
},
Types: []IntrospectionQueryFullType{
{
Kind: "OBJECT",
Name: "Subscription",
Fields: []IntrospectionQueryFullTypeField{
{
Name: "Hello",
Type: IntrospectionTypeRef{
Kind: "SCALAR",
},
},
},
},
},
},
},
})
// if something went wrong
if err != nil {
t.Error(err.Error())
return
}
// make sure we got a schema back
if schema == nil {
t.Error("Received nil schema")
return
}
if schema.Subscription == nil {
t.Error("Subscription was nil")
return
}
// make sure the query type has the right name
assert.Equal(t, "Subscription", schema.Subscription.Name)
}
func TestIntrospectQuery_multipleTypes(t *testing.T) {
// introspect the api with a known response
schema, err := IntrospectAPI(&MockSuccessQueryer{
IntrospectionQueryResult{
Schema: &IntrospectionQuerySchema{
QueryType: IntrospectionQueryRootType{
Name: "Query",
},
Types: []IntrospectionQueryFullType{
{
Kind: "OBJECT",
Name: "Type1",
},
{
Kind: "OBJECT",
Name: "Type2",
},
},
},
},
})
// if something went wrong
if err != nil {
t.Error(err.Error())
return
}
// make sure that the schema has both types
if len(schema.Types) != 2 {
t.Errorf("Encountered incorrect number of types: %v", len(schema.Types))
return
}
// there should be Type1
type1, ok := schema.Types["Type1"]
if !ok {
t.Errorf("Did not have a type 1")
return
}
assert.Equal(t, "Type1", type1.Name)
assert.Equal(t, ast.Object, type1.Kind)
// there should be Type2
type2, ok := schema.Types["Type2"]
if !ok {
t.Errorf("Did not have a type 2")
return
}
assert.Equal(t, "Type2", type2.Name)
assert.Equal(t, ast.Object, type2.Kind)
}
func TestIntrospectQuery_interfaces(t *testing.T) {
// introspect the api with a known response
schema, err := IntrospectAPI(&MockSuccessQueryer{
IntrospectionQueryResult{
Schema: &IntrospectionQuerySchema{
QueryType: IntrospectionQueryRootType{
Name: "Query",
},
Types: []IntrospectionQueryFullType{
{
Kind: "INTERFACE",
Name: "IFace",
Description: "Description",
Fields: []IntrospectionQueryFullTypeField{
{
Name: "Hello",
Type: IntrospectionTypeRef{
Kind: "SCALAR",
},
},
},
},
{
Kind: "OBJECT",
Name: "Type1",
Interfaces: []IntrospectionTypeRef{
{
Kind: "INTERFACE",
Name: "IFace",
},
},
},
{
Kind: "OBJECT",
Name: "Type2",
Interfaces: []IntrospectionTypeRef{
{
Kind: "INTERFACE",
Name: "IFace",
},
},
},
},
},
},
})
if err != nil {
t.Error(err.Error())
return
}
iface, ok := schema.Types["IFace"]
if !ok {
t.Error("Could not find union")
return
}
// make sure the meta data was correct
assert.Equal(t, "IFace", iface.Name)
assert.Equal(t, "Description", iface.Description)
// make sure there is only one field defined
fields := iface.Fields
if len(fields) != 1 {
t.Errorf("Encountered incorrect number of fields on interface: %v", len(fields))
return
}
assert.Equal(t, "Hello", fields[0].Name)
// get the list of possible types that the implement the interface
possibleTypes := schema.GetPossibleTypes(schema.Types["IFace"])
if len(possibleTypes) != 2 {
t.Errorf("Encountered incorrect number of fields that are possible for an interface: %v", len(possibleTypes))
return
}
// make sure the first possible type matches expectations
possibleType1 := possibleTypes[0]
if possibleType1.Name != "Type1" && possibleType1.Name != "Type2" {
t.Errorf("first possible type did not have the right name: %s", possibleType1.Name)
return
}
// make sure the first possible type matches expectations
possibleType2 := possibleTypes[0]
if possibleType2.Name != "Type1" && possibleType2.Name != "Type2" {
t.Errorf("first possible type did not have the right name: %s", possibleType2.Name)
return
}
// make sure the 2 types implement the interface
type1Implements := schema.GetImplements(schema.Types["Type1"])
// type 1 implements 2 types
if len(type1Implements) != 2 {
t.Errorf("Type1 implements incorrect number of types: %v", len(type1Implements))
return
}
// make sure it implements intself
assert.Equal(t, "Type1", type1Implements[0].Name)
type1Implementer := type1Implements[1]
assert.Equal(t, "IFace", type1Implementer.Name)
type2Implements := schema.GetImplements(schema.Types["Type2"])
// type 1 implements only one type
if len(type2Implements) != 2 {
t.Errorf("Type2 implements incorrect number of types: %v", len(type2Implements))
return
}
assert.Equal(t, "Type2", type2Implements[0].Name)
type2Implementer := type2Implements[1]
assert.Equal(t, "IFace", type2Implementer.Name)
}
func TestIntrospectQuery_unions(t *testing.T) {
// introspect the api with a known response
schema, err := IntrospectAPI(&MockSuccessQueryer{
IntrospectionQueryResult{
Schema: &IntrospectionQuerySchema{
QueryType: IntrospectionQueryRootType{
Name: "Query",
},
Types: []IntrospectionQueryFullType{
{
Kind: "UNION",
Name: "Maybe",
Description: "Description",
PossibleTypes: []IntrospectionTypeRef{
{
Kind: "OBJECT",
Name: "Type1",
},
// ensure the type does not reference itself,
// however someone creates a situation where this actually happens (╯°□°)╯︵ ┻━┻
{
Kind: "UNION",
Name: "Maybe",
},
{
Kind: "OBJECT",
Name: "Type2",
},
},
},
{
Kind: "OBJECT",
Name: "Type1",
},
{
Kind: "OBJECT",
Name: "Type2",
},
},
},
},
})
if err != nil {
t.Error(err.Error())
return
}
union, ok := schema.Types["Maybe"]
if !ok {
t.Error("Could not find union")
return
}
const expectedTypes = 2
// make sure the union matches expectations
assert.Equal(t, "Maybe", union.Name)
assert.Equal(t, ast.Union, union.Kind)
assert.Equal(t, "Description", union.Description)
assert.Lenf(t, union.Types, expectedTypes, "union.Types should have %d elements", expectedTypes)
// make sure that the possible types for the Union match expectations
possibleTypes := schema.GetPossibleTypes(schema.Types["Maybe"])
if len(possibleTypes) != expectedTypes {
t.Errorf("Encountered the right number of possible types: %v", len(possibleTypes))
return
}
// make sure the first possible type matches expectations
possibleType1 := possibleTypes[0]
if possibleType1.Name != "Type1" && possibleType1.Name != "Type2" {
t.Errorf("first possible type did not have the right name: %s", possibleType1.Name)
return
}
// make sure the first possible type matches expectations
possibleType2 := possibleTypes[0]
if possibleType2.Name != "Type1" && possibleType2.Name != "Type2" {
t.Errorf("first possible type did not have the right name: %s", possibleType2.Name)
return
}
// make sure the 2 types implement the union
type1Implements := schema.GetImplements(schema.Types["Type1"])
// type 1 implements only one type
if len(type1Implements) != 2 {
t.Errorf("Type1 implements incorrect number of types: %v", len(type1Implements))
return
}
type1Implementer := type1Implements[0]
assert.Equal(t, "Maybe", type1Implementer.Name)
type2Implements := schema.GetImplements(schema.Types["Type2"])
// type 1 implements only one type
if len(type2Implements) != 2 {
t.Errorf("Type2 implements incorrect number of types: %v", len(type2Implements))
return
}
type2Implementer := type2Implements[0]
assert.Equal(t, "Maybe", type2Implementer.Name)
}
func TestIntrospectQueryUnmarshalType_scalarFields(t *testing.T) {
// introspect the api with a known response
schema, err := IntrospectAPI(&MockSuccessQueryer{
IntrospectionQueryResult{
Schema: &IntrospectionQuerySchema{
QueryType: IntrospectionQueryRootType{
Name: "Query",
},
Types: []IntrospectionQueryFullType{
{
Kind: "SCALAR",
Name: "Name",
Description: "Description",
},
},
},
},
})
if err != nil {
t.Error(err.Error())
return
}
// create a scalar type with known characteristics
scalar, ok := schema.Types["Name"]
if !ok {
t.Error("Could not find a reference to Name scalar")
return
}
// make sure the scalar has the right meta data
assert.Equal(t, ast.Scalar, scalar.Kind)
assert.Equal(t, "Name", scalar.Name)
assert.Equal(t, "Description", scalar.Description)
}
func TestIntrospectQueryUnmarshalType_objects(t *testing.T) {
// introspect the api with a known response
schema, err := IntrospectAPI(&MockSuccessQueryer{
IntrospectionQueryResult{
Schema: &IntrospectionQuerySchema{
QueryType: IntrospectionQueryRootType{
Name: "Query",
},
Types: []IntrospectionQueryFullType{
{
Kind: "OBJECT",
Name: "Query",
Description: "Description",
Fields: []IntrospectionQueryFullTypeField{
{
Name: "hello",
Description: "field-description",
Args: []IntrospectionInputValue{
{
Name: "arg1",
Description: "arg1-description",
Type: IntrospectionTypeRef{
Name: "String",
},
},
},
Type: IntrospectionTypeRef{
Name: "Foo",
},
},
},
},
},
},
},
})
if err != nil {
t.Error(err.Error())
return
}
// create a scalar type with known characteristics
object, ok := schema.Types["Query"]
if !ok {
t.Error("Could not find a reference to Query object")
return
}
// make sure the object has the right meta data
assert.Equal(t, ast.Object, object.Kind)
assert.Equal(t, "Query", object.Name)
assert.Equal(t, "Description", object.Description)
// we should have added a single field
if len(object.Fields) != 1 {
t.Errorf("Encountered incorrect number of fields: %v", len(object.Fields))
return
}
field := object.Fields[0]
// make sure it had the right metadata
assert.Equal(t, "hello", field.Name)
assert.Equal(t, "field-description", field.Description)
assert.Equal(t, "Foo", field.Type.Name())
// it should have one arg
if len(field.Arguments) != 1 {
t.Errorf("Encountered incorrect number of arguments: %v", len(field.Arguments))
return
}
argument := field.Arguments[0]
// make sure it has the right metadata
assert.Equal(t, "arg1", argument.Name)
assert.Equal(t, "arg1-description", argument.Description)
assert.Equal(t, "String", argument.Type.Name())
}
func TestIntrospectQueryUnmarshalType_directives(t *testing.T) { // introspect the api with a known response
schema, err := IntrospectAPI(&MockSuccessQueryer{
IntrospectionQueryResult{
Schema: &IntrospectionQuerySchema{
QueryType: IntrospectionQueryRootType{
Name: "Query",
},
Types: []IntrospectionQueryFullType{
{
Kind: "OBJECT",
Name: "Query",
Description: "Description",
Fields: []IntrospectionQueryFullTypeField{
{
Name: "hello",
Description: "field-description",
Args: []IntrospectionInputValue{
{
Name: "arg1",
Description: "arg1-description",
Type: IntrospectionTypeRef{
Name: "String",
},
},
},
Type: IntrospectionTypeRef{
Name: "Foo",
},
},
},
},
},
Directives: []IntrospectionQueryDirective{
{
Name: "internal",
Description: "internal-description",
Locations: []string{"QUERY", "MUTATION"},
Args: []IntrospectionInputValue{
{
Name: "hello",
Description: "hello-description",
Type: IntrospectionTypeRef{
Name: "String",
},
},
},
},
},
},
},
})
if err != nil {
t.Error(err.Error())
return
}
// make sure we have the one definition
if len(schema.Directives) != 1 {
t.Errorf("Encountered incorrect number of directives: %v", len(schema.Types))
return
}
directive, ok := schema.Directives["internal"]
if !ok {
t.Error("Could not find directive 'internal'")
return
}
// make sure that the directive meta data is right
assert.Equal(t, "internal", directive.Name)
assert.Equal(t, "internal-description", directive.Description)
assert.Equal(t, []ast.DirectiveLocation{ast.LocationQuery, ast.LocationMutation}, directive.Locations)
// make sure we got the args right
if len(directive.Arguments) != 1 {
t.Errorf("Encountered incorrect number of arguments: %v", len(directive.Arguments))
return
}
// make sure we got the argumen type right
assert.Equal(t, "String", directive.Arguments[0].Type.Name())
}
func TestIntrospectQueryUnmarshalType_enums(t *testing.T) {
// introspect the api with a known response
schema, err := IntrospectAPI(&MockSuccessQueryer{
IntrospectionQueryResult{
Schema: &IntrospectionQuerySchema{
QueryType: IntrospectionQueryRootType{
Name: "Query",
},
Types: []IntrospectionQueryFullType{
{
Kind: "ENUM",
Name: "Word",
Description: "enum-description",
EnumValues: []IntrospectionQueryEnumDefinition{
{
Name: "hello",
Description: "hello-description",
},
{
Name: "goodbye",
Description: "goodbye-description",
},
},
},
},
},
},
})
if err != nil {
t.Error(err.Error())
return
}
// make sure we have the one definitino
if len(schema.Types) != 1 {
t.Errorf("Encountered incorrect number of types: %v", len(schema.Types))
return
}
enum, ok := schema.Types["Word"]
if !ok {
t.Error("Coud not find definition for Word enum")
return
}
// make sure the values matched expectations
assert.Equal(t, "Word", enum.Name)
assert.Equal(t, ast.Enum, enum.Kind)
assert.Equal(t, "enum-description", enum.Description)
assert.Equal(t, enum.EnumValues, ast.EnumValueList{
&ast.EnumValueDefinition{
Name: "hello",
Description: "hello-description",
},
&ast.EnumValueDefinition{
Name: "goodbye",
Description: "goodbye-description",
},
})
}
func TestIntrospectQuery_deprecatedFields(t *testing.T) {
t.Skip("Not yet implemented")
}
func TestIntrospectQuery_deprecatedEnums(t *testing.T) {
t.Skip("Not yet Implemented")
}
func TestIntrospectQueryUnmarshalType_inputObjects(t *testing.T) {
// introspect the api with a known response
schema, err := IntrospectAPI(&MockSuccessQueryer{
IntrospectionQueryResult{
Schema: &IntrospectionQuerySchema{
QueryType: IntrospectionQueryRootType{
Name: "Query",
},
Types: []IntrospectionQueryFullType{
{
Kind: "INPUT_OBJECT",
Name: "InputObjectType",
Description: "Description",
InputFields: []IntrospectionInputValue{
{
Name: "hello",
Description: "hello-description",
Type: IntrospectionTypeRef{
Name: "String",
},
},
},
},
},
},
},
})
if err != nil {
t.Error(err.Error())
return
}
// create a scalar type with known characteristics
object, ok := schema.Types["InputObjectType"]
if !ok {
t.Error("Could not find a reference to Query object")
return
}
// make sure the object meta data is right
assert.Equal(t, "InputObjectType", object.Name)
assert.Equal(t, "Description", object.Description)
assert.Equal(t, ast.InputObject, object.Kind)
// we should have added a single field
if len(object.Fields) != 1 {
t.Errorf("Encountered incorrect number of fields: %v", len(object.Fields))
return
}
field := object.Fields[0]
// make sure it had the right metadata
assert.Equal(t, "hello", field.Name)
assert.Equal(t, "hello-description", field.Description)
assert.Equal(t, "String", field.Type.Name())
}
func TestIntrospectUnmarshalDirectiveLocation(t *testing.T) {
// make sure each directive location is extractable
for key, value := range directiveLocationMap {
// make sure we can convert a list of strings to the list of location
result, err := introspectionUnmarshalDirectiveLocation([]string{key, key})
if err != nil {
t.Error(err.Error())
return
}
assert.Equal(t, []ast.DirectiveLocation{value, value}, result)
}
}
func TestIntrospectUnmarshalTypeDef(t *testing.T) {
// the table
table := []struct {
Message string
Expected *ast.Type
RemoteType *IntrospectionTypeRef
}{
// named types
{
"User",
ast.NamedType("User", &ast.Position{}),
&IntrospectionTypeRef{
Kind: "OBJECT",
Name: "User",
},
},
// non-null named types
{
"User!",
ast.NonNullNamedType("User", &ast.Position{}),
&IntrospectionTypeRef{
Kind: "NON_NULL",
OfType: &IntrospectionTypeRef{
Kind: "OBJECT",
Name: "User",
},
},
},
// lists of named types
{
"[User]",
ast.ListType(ast.NamedType("User", &ast.Position{}), &ast.Position{}),
&IntrospectionTypeRef{
Kind: "LIST",
OfType: &IntrospectionTypeRef{
Kind: "OBJECT",
Name: "User",
},
},
},
// non-null list of named types
{
"[User]!",
ast.NonNullListType(ast.NamedType("User", &ast.Position{}), &ast.Position{}),
&IntrospectionTypeRef{
Kind: "NON_NULL",
OfType: &IntrospectionTypeRef{
Kind: "LIST",
OfType: &IntrospectionTypeRef{
Kind: "OBJECT",
Name: "User",
},
},
},
},
// a non-null list of non-null types
{
"[User!]!",
ast.NonNullListType(ast.NonNullNamedType("User", &ast.Position{}), &ast.Position{}),
&IntrospectionTypeRef{
Kind: "NON_NULL",
OfType: &IntrospectionTypeRef{
Kind: "LIST",
OfType: &IntrospectionTypeRef{
Kind: "NON_NULL",
OfType: &IntrospectionTypeRef{
Kind: "OBJECT",
Name: "User",
},
},
},
},
},
// lists of lists of named types
{
"[[User]]",
ast.ListType(ast.ListType(ast.NamedType("User", &ast.Position{}), &ast.Position{}), &ast.Position{}),
&IntrospectionTypeRef{
Kind: "LIST",
OfType: &IntrospectionTypeRef{
Kind: "LIST",
OfType: &IntrospectionTypeRef{
Kind: "OBJECT",
Name: "User",
},
},
},
},
}
for _, row := range table {
t.Run(row.Message, func(t *testing.T) {
assert.Equal(t, row.Expected, introspectionUnmarshalTypeRef(row.RemoteType), fmt.Sprintf("Desired type: %s", row.Message))
})
}
}
func TestIntrospectWithContext(t *testing.T) {
table := []struct {
Message string
Context context.Context
}{
{
Message: "nil context should return context.Background",
Context: nil,
},
{