move lib/go/gremlin to ent/dialect (#1192)

Summary:
Pull Request resolved: https://github.com/facebookexternal/fbc/pull/1192

Pull Request resolved: https://github.com/facebookincubator/ent/pull/11

Reviewed By: alexsn

Differential Revision: D16377224

fbshipit-source-id: 07ca7436eb9b64fbe2299568560b91466b2417ba

dialect/gremlin/encoding/graphson/common_test.go

@@ -0,0 +1,50 @@
+package graphson
+
+import (
+	"unsafe"
+
+	"github.com/json-iterator/go"
+	"github.com/stretchr/testify/mock"
+)
+
+type mocker struct {
+	mock.Mock
+}
+
+// Encode belongs to jsoniter.ValEncoder interface.
+func (m *mocker) Encode(ptr unsafe.Pointer, stream *jsoniter.Stream) {
+	m.Called(ptr, stream)
+}
+
+// IsEmpty belongs to jsoniter.ValEncoder interface.
+func (m *mocker) IsEmpty(ptr unsafe.Pointer) bool {
+	args := m.Called(ptr)
+	return args.Bool(0)
+}
+
+// Decode implements jsoniter.ValDecoder interface.
+func (m *mocker) Decode(ptr unsafe.Pointer, iter *jsoniter.Iterator) {
+	m.Called(ptr, iter)
+}
+
+// CheckType implements typeChecker interface.
+func (m *mocker) CheckType(typ Type) error {
+	args := m.Called(typ)
+	return args.Error(0)
+}
+
+// MarshalGraphson implements Marshaler interface.
+func (m *mocker) MarshalGraphson() ([]byte, error) {
+	args := m.Called()
+	data, err := args.Get(0), args.Error(1)
+	if data == nil {
+		return nil, err
+	}
+	return data.([]byte), err
+}
+
+// UnmarshalGraphson implements Unmarshaler interface.
+func (m *mocker) UnmarshalGraphson(data []byte) error {
+	args := m.Called(data)
+	return args.Error(0)
+}