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|
package ansi
import (
"image/color"
"testing"
"github.com/lucasb-eyer/go-colorful"
)
func TestRGBAToHex(t *testing.T) {
cases := []struct {
r, g, b, a uint32
want uint32
}{
{0, 0, 255, 0xffff, 0x0000ff},
{255, 255, 255, 0xffff, 0xffffff},
{255, 0, 0, 0xffff, 0xffff0000},
}
for _, c := range cases {
gotR, gotG, gotB, _ := TrueColor(c.want).RGBA()
gotR /= 256
gotG /= 256
gotB /= 256
if gotR != c.r || gotG != c.g || gotB != c.b {
t.Errorf("RGBA() of TrueColor(%06x): got (%v, %v, %v), want (%v, %v, %v)",
c.want, gotR, gotG, gotB, c.r, c.g, c.b)
}
}
}
func TestColorToHexString(t *testing.T) {
cases := []struct {
color color.Color
want string
}{
{TrueColor(0x0000ff), "#0000ff"},
{TrueColor(0xffffff), "#ffffff"},
{TrueColor(0xff0000), "#ff0000"},
}
for _, c := range cases {
got := colorToHexString(c.color)
if got != c.want {
t.Errorf("colorToHexString(%v): got %v, want %v", c.color, got, c.want)
}
}
}
func TestAnsiToRGB(t *testing.T) {
cases := []struct {
ansi byte
r, g, b uint32
}{
{0, 0, 0, 0}, // black
{1, 128, 0, 0}, // red
{255, 238, 238, 238}, // highest ANSI color (grayscale)
}
for _, c := range cases {
gotR, gotG, gotB, _ := ansiToRGB(c.ansi).RGBA()
// We need to shift the values down to 8 bits
gotR >>= 8
gotR &= 0xff
gotG >>= 8
gotG &= 0xff
gotB >>= 8
gotB &= 0xff
if gotR != c.r || gotG != c.g || gotB != c.b {
t.Errorf("ansiToRGB(%v): got (%v, %v, %v), want (%v, %v, %v)",
c.ansi, gotR, gotG, gotB, c.r, c.g, c.b)
}
}
}
func TestHexToRGB(t *testing.T) {
cases := []struct {
hex uint32
r, g, b uint32
}{
{0x0000FF, 0, 0, 255}, // blue
{0xFFFFFF, 255, 255, 255}, // white
{0xFF0000, 255, 0, 0}, // red
}
for _, c := range cases {
gotR, gotG, gotB := hexToRGB(c.hex)
if gotR != c.r || gotG != c.g || gotB != c.b {
t.Errorf("hexToRGB(%v): got (%v, %v, %v), want (%v, %v, %v)",
c.hex, gotR, gotG, gotB, c.r, c.g, c.b)
}
}
}
func TestHexTo256(t *testing.T) {
testCases := map[string]struct {
input colorful.Color
expectedHex string
expectedOutput IndexedColor
}{
"white": {
input: colorful.Color{R: 1, G: 1, B: 1},
expectedHex: "#ffffff",
expectedOutput: 231,
},
"offwhite": {
input: colorful.Color{R: 0.9333, G: 0.9333, B: 0.933},
expectedHex: "#eeeeee",
expectedOutput: 255,
},
"slightly brighter than offwhite": {
input: colorful.Color{R: 0.95, G: 0.95, B: 0.95},
expectedHex: "#f2f2f2",
expectedOutput: 255,
},
"red": {
input: colorful.Color{R: 1, G: 0, B: 0},
expectedHex: "#ff0000",
expectedOutput: 196,
},
"silver foil": {
input: colorful.Color{R: 0.6863, G: 0.6863, B: 0.6863},
expectedHex: "#afafaf",
expectedOutput: 145,
},
"silver chalice": {
input: colorful.Color{R: 0.698, G: 0.698, B: 0.698},
expectedHex: "#b2b2b2",
expectedOutput: 249,
},
"slightly closer to silver foil": {
input: colorful.Color{R: 0.692, G: 0.692, B: 0.692},
expectedHex: "#b0b0b0",
expectedOutput: 145,
},
"slightly closer to silver chalice": {
input: colorful.Color{R: 0.694, G: 0.694, B: 0.694},
expectedHex: "#b1b1b1",
expectedOutput: 249,
},
"gray": {
input: colorful.Color{R: 0.5, G: 0.5, B: 0.5},
expectedHex: "#808080",
expectedOutput: 244,
},
}
for testName, testCase := range testCases {
t.Run(testName, func(t *testing.T) {
// hex := fmt.Sprintf("#%02x%02x%02x", uint8(testCase.input.R*255), uint8(testCase.input.G*255), uint8(testCase.input.B*255))
output := Convert256(testCase.input)
if testCase.input.Hex() != testCase.expectedHex {
t.Errorf("Expected %+v to map to %s, but instead received %s", testCase.input, testCase.expectedHex, testCase.input.Hex())
}
if output != testCase.expectedOutput {
t.Errorf("Expected truecolor %+v to map to 256 color %d, but instead received %d", testCase.input, testCase.expectedOutput, output)
}
})
}
}
|
