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add test for trimEdges with circle image

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Vetle Leinonen-Roeim 2025-03-30 17:23:25 +02:00
parent 3a6c85148a
commit 5c2594a139
1 changed files with 57 additions and 0 deletions
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57
transform_test.go
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@ -410,3 +410,60 @@ func TestTrimEdgesSingleColorImage(t *testing.T) {
t.Errorf("trimEdges() = %v, want %v", got.Bounds(), want.Bounds())
}
}
func TestTrimEdgesCircle(t *testing.T) {
// Define colors for better readability
white := color.NRGBA{255, 255, 255, 255}
red := color.NRGBA{255, 0, 0, 255}
// Create a 9x9 image with a white background and a larger red circle in the center
src := newImage(9, 9,
white, white, white, white, white, white, white, white, white,
white, white, white, red, red, red, white, white, white,
white, white, red, red, red, red, red, white, white,
white, red, red, red, red, red, red, red, white,
white, red, red, red, red, red, red, red, white,
white, red, red, red, red, red, red, red, white,
white, white, red, red, red, red, red, white, white,
white, white, white, red, red, red, white, white, white,
white, white, white, white, white, white, white, white, white,
)
// Expected result: a trimmed 7x7 image containing only the circle
want := newImage(7, 7,
white, white, red, red, red, white, white,
white, red, red, red, red, red, white,
red, red, red, red, red, red, red,
red, red, red, red, red, red, red,
red, red, red, red, red, red, red,
white, red, red, red, red, red, white,
white, white, red, red, red, white, white,
)
// Apply the trimEdges function
got := trimEdges(src)
// Compare pixel data
if !compareImages(got, want) {
t.Errorf("trimEdges() pixel data does not match expected result")
}
}
func compareImages(img1, img2 image.Image) bool {
bounds1 := img1.Bounds()
bounds2 := img2.Bounds()
if !bounds1.Eq(bounds2) {
return false
}
for y := bounds1.Min.Y; y < bounds1.Max.Y; y++ {
for x := bounds1.Min.X; x < bounds1.Max.X; x++ {
r1, g1, b1, a1 := img1.At(x, y).RGBA()
r2, g2, b2, a2 := img2.At(x, y).RGBA()
if r1 != r2 || g1 != g2 || b1 != b2 || a1 != a2 {
return false
}
}
}
return true
}