Add GetTime method to Timestamp (#2743)

Author: 6543

github/timestamp.go

@@ -22,6 +22,14 @@ func (t Timestamp) String() string {
 	return t.Time.String()
 }
 
+// GetTime returns std time.Time.
+func (t *Timestamp) GetTime() *time.Time {
+	if t == nil {
+		return nil
+	}
+	return &t.Time
+}
+
 // UnmarshalJSON implements the json.Unmarshaler interface.
 // Time is expected in RFC3339 or Unix format.
 func (t *Timestamp) UnmarshalJSON(data []byte) (err error) {

github/timestamp_test.go

@@ -169,6 +169,17 @@ func TestWrappedTimestamp_Unmarshal(t *testing.T) {
 	}
 }
 
+func TestTimestamp_GetTime(t *testing.T) {
+	var t1 *Timestamp
+	if t1.GetTime() != nil {
+		t.Errorf("nil timestamp should return nil, got: %v", t1.GetTime())
+	}
+	t1 = &Timestamp{referenceTime}
+	if !t1.GetTime().Equal(referenceTime) {
+		t.Errorf("want reference time, got: %s", t1.GetTime().String())
+	}
+}
+
 func TestWrappedTimestamp_MarshalReflexivity(t *testing.T) {
 	testCases := []struct {
 		desc string