support TextMarshaler as map key

value_tests/marshaler_test.go

@@ -8,11 +8,23 @@ import (
 func init() {
 	jsonMarshaler := json.Marshaler(fakeJsonMarshaler{})
 	textMarshaler := encoding.TextMarshaler(fakeTextMarshaler{})
+	textMarshaler2 := encoding.TextMarshaler(&fakeTextMarshaler2{})
 	marshalCases = append(marshalCases,
 		fakeJsonMarshaler{},
 		&jsonMarshaler,
 		fakeTextMarshaler{},
 		&textMarshaler,
+		fakeTextMarshaler2{},
+		&textMarshaler2,
+		map[fakeTextMarshaler]int{
+			fakeTextMarshaler{}: 100,
+		},
+		map[*fakeTextMarshaler]int{
+			&fakeTextMarshaler{}: 100,
+		},
+		map[encoding.TextMarshaler]int{
+			textMarshaler: 100,
+		},
 	)
 }
 
@@ -40,3 +52,15 @@ func (q fakeTextMarshaler) MarshalText() ([]byte, error) {
 func (q *fakeTextMarshaler) UnmarshalText(value []byte) error {
 	return nil
 }
+
+type fakeTextMarshaler2 struct {
+	Field2 int
+}
+
+func (q *fakeTextMarshaler2) MarshalText() ([]byte, error) {
+	return []byte(`"abc"`), nil
+}
+
+func (q *fakeTextMarshaler2) UnmarshalText(value []byte) error {
+	return nil
+}

value_tests/value_test.go

@@ -54,9 +54,9 @@ func Test_marshal(t *testing.T) {
 		t.Run(name, func(t *testing.T) {
 			should := require.New(t)
 			output1, err1 := json.Marshal(testCase)
-			should.NoError(err1)
+			should.NoError(err1, "json")
 			output2, err2 := jsoniter.ConfigCompatibleWithStandardLibrary.Marshal(testCase)
-			should.NoError(err2)
+			should.NoError(err2, "jsoniter")
 			should.Equal(string(output1), string(output2))
 		})
 	}