Fix issue graphql.Time unmarshal time check #432

time.go

@@ -35,7 +35,13 @@ func (t *Time) UnmarshalGraphQL(input interface{}) error {
 		t.Time = time.Unix(int64(input), 0)
 		return nil
 	case int64:
-		t.Time = time.Unix(input, 0)
+		if input >= 1e10 {
+			sec := input / 1e9
+			nsec := input - (sec * 1e9)
+			t.Time = time.Unix(sec, nsec)
+		} else {
+			t.Time = time.Unix(input, 0)
+		}
 		return nil
 	case float64:
 		t.Time = time.Unix(int64(input), 0)

time_test.go

@@ -0,0 +1,50 @@
+package graphql
+
+import (
+	"testing"
+	"time"
+)
+
+var timeTestCases = []interface{}{
+	time.Now(),
+	int32(1),
+	time.Now().Unix(),
+	time.Now().UnixNano(),
+	float64(-1),
+	"2006-01-02T15:04:05Z",
+}
+
+func TestImplementsGraphQLType(t *testing.T) {
+	time := Time{}
+	if !time.ImplementsGraphQLType("Time") {
+		t.Fail()
+	}
+}
+
+func TestUnmarshalGraphQL(t *testing.T) {
+	var err error
+	testTime := &Time{}
+
+	for _, timeType := range timeTestCases {
+		if err = testTime.UnmarshalGraphQL(timeType); err != nil {
+			t.Fatalf("Failed to unmarshal %#v to Time: %s", timeType, err.Error())
+		}
+	}
+
+	if err = testTime.UnmarshalGraphQL(false); err == nil {
+		t.Fatalf("Unmarshaling of %T to Time should be failed.", false)
+	}
+}
+
+func TestMarshalJSON(t *testing.T) {
+	exampleTime := "\"0001-01-01T00:00:00Z\""
+	testTime := &Time{}
+
+	buf, err := testTime.MarshalJSON()
+	if err != nil {
+		t.Fatalf("Failed to marshal time to JSON: %s", err.Error())
+	}
+	if string(buf) != exampleTime {
+		t.Fatalf("Failed to marshal Time to JSON, expected %s, but instead got %s", exampleTime, buf)
+	}
+}