fix(test)

image_test.go

@@ -46,7 +46,7 @@ func TestImageRotate(t *testing.T) {
 }
 
 func TestImageConvert(t *testing.T) {
-	buf, err := initImage("test_rotate_out.jpg").Convert(PNG)
+	buf, err := initImage("test.jpg").Convert(PNG)
 	if err != nil {
 		t.Errorf("Cannot process the image: %#v", err)
 	}

resize.go

@@ -15,6 +15,10 @@ import (
 func Resize(buf []byte, o Options) ([]byte, error) {
 	defer C.vips_thread_shutdown()
 
+	if len(buf) == 0 {
+		return nil, errors.New("Image buffer is empty")
+	}
+
 	image, imageType, err := vipsRead(buf)
 	if err != nil {
 		return nil, err