feat: Add Black and Underline

Author: TwiN

README.md

@@ -29,8 +29,10 @@ import "github.com/TwiN/go-color"
 
 func main() {
     println(color.Ize(color.Red, "This is red"))
-    // Or if you prefer the longer version
+    // Or if you prefer the longer version:
     println(color.Colorize(color.Red, "This is red"))
+    // Or if you prefer the non-parameterized version:
+    println(color.InRed("This is red"))
 }
 ```
 
@@ -50,6 +52,8 @@ import "github.com/TwiN/go-color"
 
 func main() {
     println(color.InBold("This is bold"))
+    println(color.InUnderline("This is underlined"))
+    println(color.InBlack("This is black"))
     println(color.InRed("This is red"))
     println(color.InGreen("This is green"))
     println(color.InYellow("This is yellow"))
@@ -76,6 +80,8 @@ import "github.com/TwiN/go-color"
 
 func main() {
     println(color.Bold + "This is bold" + color.Reset)
+    println(color.Underline + "This is underlined" + color.Reset)
+    println(color.Black + "This is black" + color.Reset)
     println(color.Red + "This is red" + color.Reset)
     println(color.Green + "This is green" + color.Reset)
     println(color.Yellow + "This is yellow" + color.Reset)

color.go

@@ -1,102 +1,133 @@
 package color
 
 var (
-	Reset  = "\033[0m"
-	Bold   = "\033[1m"
-	Red    = "\033[31m"
-	Green  = "\033[32m"
-	Yellow = "\033[33m"
-	Blue   = "\033[34m"
-	Purple = "\033[35m"
-	Cyan   = "\033[36m"
-	Gray   = "\033[37m"
-	White  = "\033[97m"
+	Reset     = "\033[0m"
+	Bold      = "\033[1m"
+	Underline = "\033[4m"
+	Black     = "\033[30m"
+	Red       = "\033[31m"
+	Green     = "\033[32m"
+	Yellow    = "\033[33m"
+	Blue      = "\033[34m"
+	Purple    = "\033[35m"
+	Cyan      = "\033[36m"
+	Gray      = "\033[37m"
+	White     = "\033[97m"
 )
 
 // Ize is an alias for the Colorize function
 //
 // Example:
-//     println(color.Ize(color.Red, "This is red"))
+//
+//	println(color.Ize(color.Red, "This is red"))
 func Ize(color, s string) string {
 	return Colorize(color, s)
 }
 
 // Colorize wraps a given message in a given color.
 //
 // Example:
-//     println(color.Colorize(color.Red, "This is red"))
+//
+//	println(color.Colorize(color.Red, "This is red"))
 func Colorize(color, s string) string {
 	return color + s + Reset
 }
 
 // InBold wraps the given string s in Bold
 //
 // Example:
-//     println(color.InBold("This is bold"))
+//
+//	println(color.InBold("This is bold"))
 func InBold(s string) string {
 	return Colorize(Bold, s)
 }
 
+// InUnderline wraps the given string s in Underline
+//
+// Example:
+//
+//	println(color.InUnderline("This is underlined"))
+func InUnderline(s string) string {
+	return Colorize(Underline, s)
+}
+
+// InBlack wraps the given string s in Black
+//
+// Example:
+//
+//	println(color.InBlack("This is black"))
+func InBlack(s string) string {
+	return Colorize(Black, s)
+}
+
 // InRed wraps the given string s in Red
 //
 // Example:
-//     println(color.InRed("This is red"))
+//
+//	println(color.InRed("This is red"))
 func InRed(s string) string {
 	return Colorize(Red, s)
 }
 
 // InGreen wraps the given string s in Green
 //
 // Example:
-//     println(color.InGreen("This is green"))
+//
+//	println(color.InGreen("This is green"))
 func InGreen(s string) string {
 	return Colorize(Green, s)
 }
 
 // InYellow wraps the given string s in Yellow
 //
 // Example:
-//     println(color.InYellow("This is yellow"))
+//
+//	println(color.InYellow("This is yellow"))
 func InYellow(s string) string {
 	return Colorize(Yellow, s)
 }
 
 // InBlue wraps the given string s in Blue
 //
 // Example:
-//     println(color.InBlue("This is blue"))
+//
+//	println(color.InBlue("This is blue"))
 func InBlue(s string) string {
 	return Colorize(Blue, s)
 }
 
 // InPurple wraps the given string s in Purple
 //
 // Example:
-//     println(color.InPurple("This is purple"))
+//
+//	println(color.InPurple("This is purple"))
 func InPurple(s string) string {
 	return Colorize(Purple, s)
 }
 
 // InCyan wraps the given string s in Cyan
 //
 // Example:
-//     println(color.InCyan("This is cyan"))
+//
+//	println(color.InCyan("This is cyan"))
 func InCyan(s string) string {
 	return Colorize(Cyan, s)
 }
 
 // InGray wraps the given string s in Gray
 //
 // Example:
-//     println(color.InGray("This is gray"))
+//
+//	println(color.InGray("This is gray"))
 func InGray(s string) string {
 	return Colorize(Gray, s)
 }
 
 // InWhite wraps the given string s in White
 //
 // Example:
-//     println(color.InWhite("This is white"))
+//
+//	println(color.InWhite("This is white"))
 func InWhite(s string) string {
 	return Colorize(White, s)
 }

color_test.go

@@ -4,6 +4,9 @@ import "testing"
 
 // Clearly not a real test - just a visual reference
 func TestOutput(t *testing.T) {
+	println(Bold + "Hello" + Reset)
+	println(Underline + "Hello" + Reset)
+	println(Black + "Hello" + Reset)
 	println(Red + "Hello" + Reset)
 	println(Green + "Hello" + Reset)
 	println(Yellow + "Hello" + Reset)
@@ -25,6 +28,14 @@ func TestColorize(t *testing.T) {
 			Color:          Bold,
 			ExpectedOutput: "\033[1mtest\033[0m",
 		},
+		{
+			Color:          Underline,
+			ExpectedOutput: "\033[4mtest\033[0m",
+		},
+		{
+			Color:          Black,
+			ExpectedOutput: "\033[30mtest\033[0m",
+		},
 		{
 			Color:          Red,
 			ExpectedOutput: "\033[31mtest\033[0m",
@@ -79,6 +90,16 @@ func TestIn(t *testing.T) {
 			Color:          Bold,
 			ExpectedOutput: "\033[1mtest\033[0m",
 		},
+		{
+			Func:           InUnderline,
+			Color:          Underline,
+			ExpectedOutput: "\033[4mtest\033[0m",
+		},
+		{
+			Func:           InBlack,
+			Color:          Black,
+			ExpectedOutput: "\033[30mtest\033[0m",
+		},
 		{
 			Func:           InRed,
 			Color:          Red,

color_windows.go

@@ -16,6 +16,8 @@ func init() {
 		if _, _, err := setConsoleModeProc.Call(uintptr(handle), 0x0001|0x0002|0x0004); err != nil && err.Error() != "The operation completed successfully." {
 			Reset = ""
 			Bold = ""
+			Underline = ""
+			Black = ""
 			Red = ""
 			Green = ""
 			Yellow = ""