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package color
import (
"bytes"
"fmt"
"os"
"testing"
)
// Testing colors is kinda different. First we test for given colors and their
// escaped formatted results. Next we create some visual tests to be tested.
// Each visual test includes the color name to be compared.
func TestColor(t *testing.T) {
rb := new(bytes.Buffer)
Output = rb
testColors := []struct {
text string
code Attribute
}{
{text: "black", code: FgBlack},
{text: "red", code: FgRed},
{text: "green", code: FgGreen},
{text: "yellow", code: FgYellow},
{text: "blue", code: FgBlue},
{text: "magent", code: FgMagenta},
{text: "cyan", code: FgCyan},
{text: "white", code: FgWhite},
}
for _, c := range testColors {
New(c.code).Print(c.text)
line, _ := rb.ReadString('\n')
scannedLine := fmt.Sprintf("%q", line)
colored := fmt.Sprintf("\x1b[%dm%s\x1b[0m", c.code, c.text)
escapedForm := fmt.Sprintf("%q", colored)
fmt.Printf("%s\t: %s\n", c.text, line)
if scannedLine != escapedForm {
t.Errorf("Expecting %s, got '%s'\n", escapedForm, scannedLine)
}
}
// First Visual Test
fmt.Println("")
Output = os.Stdout
New(FgRed).Printf("red\t")
New(BgRed).Print(" ")
New(FgRed, Bold).Println(" red")
New(FgGreen).Printf("green\t")
New(BgGreen).Print(" ")
New(FgGreen, Bold).Println(" green")
New(FgYellow).Printf("yellow\t")
New(BgYellow).Print(" ")
New(FgYellow, Bold).Println(" yellow")
New(FgBlue).Printf("blue\t")
New(BgBlue).Print(" ")
New(FgBlue, Bold).Println(" blue")
New(FgMagenta).Printf("magenta\t")
New(BgMagenta).Print(" ")
New(FgMagenta, Bold).Println(" magenta")
New(FgCyan).Printf("cyan\t")
New(BgCyan).Print(" ")
New(FgCyan, Bold).Println(" cyan")
New(FgWhite).Printf("white\t")
New(BgWhite).Print(" ")
New(FgWhite, Bold).Println(" white")
fmt.Println("")
// Second Visual test
Black("black")
Red("red")
Green("green")
Yellow("yellow")
Blue("blue")
Magenta("magenta")
Cyan("cyan")
White("white")
// Third visual test
fmt.Println()
Set(FgBlue)
fmt.Println("is this blue?")
Unset()
Set(FgMagenta)
fmt.Println("and this magenta?")
Unset()
// Fourth Visual test
fmt.Println()
blue := New(FgBlue).PrintlnFunc()
blue("blue text with custom print func")
red := New(FgRed).PrintfFunc()
red("red text with a printf func: %d\n", 123)
put := New(FgYellow).SprintFunc()
warn := New(FgRed).SprintFunc()
fmt.Printf("this is a %s and this is %s.\n", put("warning"), warn("error"))
info := New(FgWhite, BgGreen).SprintFunc()
fmt.Printf("this %s rocks!\n", info("package"))
// Fifth Visual Test
fmt.Println()
fmt.Println(BlackString("black"))
fmt.Println(RedString("red"))
fmt.Println(GreenString("green"))
fmt.Println(YellowString("yellow"))
fmt.Println(BlueString("blue"))
fmt.Println(MagentaString("magenta"))
fmt.Println(CyanString("cyan"))
fmt.Println(WhiteString("white"))
}
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