mirror of
https://github.com/alecthomas/chroma.git
synced 2025-10-30 23:57:49 +02:00
43 lines
1.1 KiB
Go
43 lines
1.1 KiB
Go
package chroma
|
|
|
|
import (
|
|
"testing"
|
|
|
|
"github.com/alecthomas/assert"
|
|
)
|
|
|
|
func TestColourRGB(t *testing.T) {
|
|
colour := ParseColour("#8913af")
|
|
assert.Equal(t, uint8(0x89), colour.Red())
|
|
assert.Equal(t, uint8(0x13), colour.Green())
|
|
assert.Equal(t, uint8(0xaf), colour.Blue())
|
|
}
|
|
|
|
func TestColourString(t *testing.T) {
|
|
assert.Equal(t, "#8913af", ParseColour("#8913af").String())
|
|
}
|
|
|
|
func distance(a, b uint8) uint8 {
|
|
if a < b {
|
|
return b - a
|
|
}
|
|
return a - b
|
|
}
|
|
|
|
func TestColourBrighten(t *testing.T) {
|
|
actual := NewColour(128, 128, 128).Brighten(0.5)
|
|
// Closeish to what we expect is fine.
|
|
assert.True(t, distance(192, actual.Red()) <= 2)
|
|
assert.True(t, distance(192, actual.Blue()) <= 2)
|
|
assert.True(t, distance(192, actual.Green()) <= 2)
|
|
actual = NewColour(128, 128, 128).Brighten(-0.5)
|
|
assert.True(t, distance(65, actual.Red()) <= 2)
|
|
assert.True(t, distance(65, actual.Blue()) <= 2)
|
|
assert.True(t, distance(65, actual.Green()) <= 2)
|
|
}
|
|
|
|
func TestColourBrightess(t *testing.T) {
|
|
actual := NewColour(128, 128, 128).Brightness()
|
|
assert.True(t, distance(128, uint8(actual*255.0)) <= 2)
|
|
}
|