39 lines
779 B
Go
39 lines
779 B
Go
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package main
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import (
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"image/color"
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"testing"
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)
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func TestNoop(t *testing.T) {
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c := noOp(0, 0, color.White)
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r, g, b, a := c.RGBA()
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if r != 0xffff || g != 0xffff || b != 0xffff || a != 0xffff {
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t.Log("noop did not return input")
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t.Fail()
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}
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}
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func TestLuminence(t *testing.T) {
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l := luminence(color.White)
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if l != 1 {
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t.Logf("white input did not output 1, instead %f", l)
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t.Fail()
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}
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l = luminence(color.Black)
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if l != 0 {
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t.Logf("black input did not output 0, instead %f", l)
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t.Fail()
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}
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l = luminence(color.Gray16{0x8000})
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if l < 0.5 {
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t.Logf("white-leaning gray input was not above 0.5, instead %f", l)
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t.Fail()
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}
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l = luminence(color.Gray16{0x7fff})
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if l > 0.5 {
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t.Logf("black-leaning gray input not below 0.5, instead %f", l)
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t.Fail()
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}
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}
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