feat(image): add method to retrieve the image

image.go

@@ -124,6 +124,11 @@ func (i *Image) Size() (ImageSize, error) {
 	return Size(i.buffer)
 }
 
+// Get image buffer
+func (i *Image) Image() []byte {
+	return i.buffer
+}
+
 // Creates a new image
 func NewImage(buf []byte) *Image {
 	return &Image{buf}

image_test.go

@@ -164,7 +164,7 @@ func TestFluentInterface(t *testing.T) {
 		t.Errorf("Cannot process the image: %#v", err)
 	}
 
-	buf, err := image.Convert(PNG)
+	_, err = image.Convert(PNG)
 	if err != nil {
 		t.Errorf("Cannot process the image: %#v", err)
 	}
@@ -180,7 +180,7 @@ func TestFluentInterface(t *testing.T) {
 		t.Fatal("Invalid image type")
 	}
 
-	Write("fixtures/test_image_fluent_out.png", buf)
+	Write("fixtures/test_image_fluent_out.png", image.Image())
 }
 
 func initImage(file string) *Image {