func TestWritePlanText(t *testing.T) {
	inner := bytes.NewBufferString("")
	w := ansicolor.NewAnsiColorWriter(inner)
	expected := "plain text"
	fmt.Fprintf(w, expected)
	actual := inner.String()
	if actual != expected {
		t.Errorf("Get %s, want %s", actual, expected)
	}
}
Beispiel #2
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func ExampleNewAnsiColorWriter() {
	w := ansicolor.NewAnsiColorWriter(os.Stdout)
	text := "%sforeground %sbold%s %sbackground%s\n"
	fmt.Fprintf(w, text, "\x1b[31m", "\x1b[1m", "\x1b[21m", "\x1b[41;32m", "\x1b[0m")
	fmt.Fprintf(w, text, "\x1b[32m", "\x1b[1m", "\x1b[21m", "\x1b[42;31m", "\x1b[0m")
	fmt.Fprintf(w, text, "\x1b[33m", "\x1b[1m", "\x1b[21m", "\x1b[43;34m", "\x1b[0m")
	fmt.Fprintf(w, text, "\x1b[34m", "\x1b[1m", "\x1b[21m", "\x1b[44;33m", "\x1b[0m")
	fmt.Fprintf(w, text, "\x1b[35m", "\x1b[1m", "\x1b[21m", "\x1b[45;36m", "\x1b[0m")
	fmt.Fprintf(w, text, "\x1b[36m", "\x1b[1m", "\x1b[21m", "\x1b[46;35m", "\x1b[0m")
	fmt.Fprintf(w, text, "\x1b[37m", "\x1b[1m", "\x1b[21m", "\x1b[47;30m", "\x1b[0m")
}
func writeAnsiColor(expectedText, colorCode string) (actualText string, actualAttributes uint16, err error) {
	inner := bytes.NewBufferString("")
	w := ansicolor.NewAnsiColorWriter(inner)
	fmt.Fprintf(w, "\x1b[%sm%s", colorCode, expectedText)

	actualText = inner.String()
	screenInfo := GetConsoleScreenBufferInfo(uintptr(syscall.Stdout))
	if screenInfo != nil {
		actualAttributes = screenInfo.WAttributes
	} else {
		err = &screenNotFoundError{}
	}
	return
}
func TestWriteParseText(t *testing.T) {
	inner := bytes.NewBufferString("")
	w := ansicolor.NewAnsiColorWriter(inner)

	inputTail := "\x1b[0mtail text"
	expectedTail := "tail text"
	fmt.Fprintf(w, inputTail)
	actualTail := inner.String()
	inner.Reset()
	if actualTail != expectedTail {
		t.Errorf("Get %s, want %s", actualTail, expectedTail)
	}

	inputHead := "head text\x1b[0m"
	expectedHead := "head text"
	fmt.Fprintf(w, inputHead)
	actualHead := inner.String()
	inner.Reset()
	if actualHead != expectedHead {
		t.Errorf("Get %s, want %s", actualHead, expectedHead)
	}

	inputBothEnds := "both ends \x1b[0m text"
	expectedBothEnds := "both ends  text"
	fmt.Fprintf(w, inputBothEnds)
	actualBothEnds := inner.String()
	inner.Reset()
	if actualBothEnds != expectedBothEnds {
		t.Errorf("Get %s, want %s", actualBothEnds, expectedBothEnds)
	}

	inputManyEsc := "\x1b\x1b\x1b\x1b[0m many esc"
	expectedManyEsc := "\x1b\x1b\x1b many esc"
	fmt.Fprintf(w, inputManyEsc)
	actualManyEsc := inner.String()
	inner.Reset()
	if actualManyEsc != expectedManyEsc {
		t.Errorf("Get %s, want %s", actualManyEsc, expectedManyEsc)
	}

	expectedSplit := "split  text"
	for _, ch := range "split \x1b[0m text" {
		fmt.Fprintf(w, string(ch))
	}
	actualSplit := inner.String()
	inner.Reset()
	if actualSplit != expectedSplit {
		t.Errorf("Get %s, want %s", actualSplit, expectedSplit)
	}
}
Beispiel #5
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// 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 = ansicolor.NewAnsiColorWriter(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.Fprintf(Output, "this is a %s and this is %s.\n", put("warning"), warn("error"))

	info := New(FgWhite, BgGreen).SprintFunc()
	fmt.Fprintf(Output, "this %s rocks!\n", info("package"))

	// Fifth Visual Test
	fmt.Println()

	fmt.Fprintln(Output, BlackString("black"))
	fmt.Fprintln(Output, RedString("red"))
	fmt.Fprintln(Output, GreenString("green"))
	fmt.Fprintln(Output, YellowString("yellow"))
	fmt.Fprintln(Output, BlueString("blue"))
	fmt.Fprintln(Output, MagentaString("magenta"))
	fmt.Fprintln(Output, CyanString("cyan"))
	fmt.Fprintln(Output, WhiteString("white"))

}
Beispiel #6
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// Add is used to chain SGR parameters. Use as many as parameters to combine
// and create custom color objects. Example: Add(color.FgRed, color.Underline).
func (c *Color) Add(value ...Attribute) *Color {
	c.params = append(c.params, value...)
	return c
}

func (c *Color) prepend(value Attribute) {
	c.params = append(c.params, 0)
	copy(c.params[1:], c.params[0:])
	c.params[0] = value
}

// Output defines the standard output of the print functions. By default
// os.Stdout is used.
var Output io.Writer = ansicolor.NewAnsiColorWriter(os.Stdout)

// Print formats using the default formats for its operands and writes to
// standard output. Spaces are added between operands when neither is a
// string. It returns the number of bytes written and any write error
// encountered. This is the standard fmt.Print() method wrapped with the given
// color.
func (c *Color) Print(a ...interface{}) (n int, err error) {
	c.Set()
	defer Unset()

	return fmt.Fprint(Output, a...)
}

// Printf formats according to a format specifier and writes to standard output.
// It returns the number of bytes written and any write error encountered.