func TestHexConversion(t *testing.T) {
goodColors := []string{
"FF0000",
"#0000FF",
"00FF00",
}
badColors := []string{
"000FF00",
"0000FF#",
"F0000",
"1234f5F",
}
for _, color := range goodColors {
_, err := imgutil.HexToRBGA(color)
if err != nil {
t.Fatalf("color %s failed when it was supposed to pass", color)
}
}
for _, badColor := range badColors {
_, err := imgutil.HexToRBGA(badColor)
if err == nil {
t.Fatalf("color %s passed when it was supposed to fail", badColor)
}
}
}
func TestConversion(t *testing.T) {
// colors to test
baseImgs := []image.Image{
makeImage(255, 0, 0), // red
makeImage(0, 255, 0), // green
makeImage(0, 0, 255), // blue
// test to see if greyscale works
makeImage(0, 0, 255), // blue
}
// colors that should be after conversion
expectedImgs := []image.Image{
makeImage(0, 0, 255), // to blue
makeImage(255, 0, 0), // to red
makeImage(0, 255, 0), // to green
// test to see if greyscale works
makeGray(0, 0, 255), // gray
}
red, err := imgutil.HexToRBGA("FF0000")
if err != nil {
t.Fatal(err)
}
blue, err := imgutil.HexToRBGA("0000Ff")
if err != nil {
t.Fatal(err)
}
green, err := imgutil.HexToRBGA("00FF00")
if err != nil {
t.Fatal(err)
}
goodConvertedImgs := []image.Image{
imgutil.ConvertImageColor(baseImgs[0], imgutil.ColorConverter(red, blue)),
imgutil.ConvertImageColor(baseImgs[1], imgutil.ColorConverter(green, red)),
imgutil.ConvertImageColor(baseImgs[2], imgutil.ColorConverter(blue, green)),
imgutil.ConvertImageColor(baseImgs[2], image.NewGray(image.Rect(0, 0, 1920, 1200)).ColorModel()),
}
badConvertedImgs := []image.Image{
imgutil.ConvertImageColor(baseImgs[0], imgutil.ColorConverter(blue, green)),
imgutil.ConvertImageColor(baseImgs[1], imgutil.ColorConverter(red, blue)),
imgutil.ConvertImageColor(baseImgs[2], imgutil.ColorConverter(green, red)),
imgutil.ConvertImageColor(baseImgs[2], imgutil.ColorConverter(green, red)),
}
for i, img := range expectedImgs {
if !compare(img, goodConvertedImgs[i]) {
t.Fatalf("was supposed to pass: image %d did not match", i)
}
if compare(img, badConvertedImgs[i]) {
t.Fatalf("was supposed to fail: image %d did match", i)
}
}
}