package manga import ( "github.com/davecgh/go-spew/spew" _ "image/jpeg" // Register JPEG format _ "image/png" // Register PNG format "testing" ) func TestGetImageNaturalSize(t *testing.T) { // Test the function width, height, err := getImageNaturalSize("https://scans-hot.leanbox.us/manga/One-Piece/1090-001.png") if err != nil { t.Fatal(err) } spew.Dump(width, height) }