feat: support multiple outputs

resize_test.go

@@ -33,3 +33,31 @@ func TestResize(t *testing.T) {
 		t.Fatal("Cannot save the image")
 	}
 }
+
+func TestConvert(t *testing.T) {
+	options := Options{Width: 640, Height: 480, Crop: false, Type: PNG}
+	img, err := os.Open("fixtures/test.jpg")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer img.Close()
+
+	buf, err := ioutil.ReadAll(img)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	newImg, err := Resize(buf, options)
+	if err != nil {
+		t.Errorf("Resize(imgData, %#v) error: %#v", options, err)
+	}
+
+	if DetermineImageType(newImg) != PNG {
+		t.Fatal("Image is not png")
+	}
+
+	err = ioutil.WriteFile("result.png", newImg, 0644)
+	if err != nil {
+		t.Fatal("Cannot save the image")
+	}
+}