Change Paste() output format and simplify test

Author: Artur Kh

Diff for: clipboard.go

@@ -25,6 +25,7 @@ func NewClipboard() (*Clipboard, error) {
 
 	for _, c := range ClipboardCommands {
 		if runtime.GOOS == "windows" {
+			// TODO: Windows
 			return nil, errors.New("Clipboard doesn't work on Windows.")
 		} else {
 			cmd := exec.Command("which", strings.Split(c.copyCmd, " ")[0])
@@ -57,14 +58,14 @@ func (c *Clipboard) Copy(content string) error {
 	return nil
 }
 
-func (c *Clipboard) Paste() (string, error) {
+func (c *Clipboard) Paste() ([]byte, error) {
 	var stdout bytes.Buffer
 
 	cmd := exec.Command(c.pasteCmd)
 	cmd.Stdout = &stdout
 	if err := cmd.Run(); err != nil {
-		return "", err
+		return nil, err
 	}
 
-	return stdout.String(), nil
+	return stdout.Bytes(), nil
 }

Diff for: clipboard_test.go

@@ -5,32 +5,21 @@ import (
 	"time"
 )
 
-func TestNewClipboard(t *testing.T) {
-	if _, err := NewClipboard(); err != nil {
-		t.Fatal(err)
-	}
-}
-
-func TestClipboardCopy(t *testing.T) {
+func TestClipboard(t *testing.T) {
 	c, err := NewClipboard()
 	if err != nil {
 		t.Fatal(err)
 	}
 
-	message := "GO COPY TEST " + time.Now().String()
+	var message string
 
-	if err := c.Copy(message); err != nil {
-		t.Fatal(err)
-	}
-}
+	message = "GO COPY TEST " + time.Now().String()
 
-func TestClipboardPaste(t *testing.T) {
-	c, err := NewClipboard()
-	if err != nil {
+	if err := c.Copy(message); err != nil {
 		t.Fatal(err)
 	}
 
-	message := "GO PASTE TEST " + time.Now().String()
+	message = "GO PASTE TEST " + time.Now().String()
 
 	if err := c.Copy(message); err != nil {
 		t.Fatal(err)