refactor: split color func from runGoTest

main.go

@@ -33,10 +33,20 @@ func runGoTest() int {
 	cmd.Stdout = outWriter
 	cmd.Stderr = errWriter
 
-	go func() {
-		defer outReader.Close()
+	go colorOutputReader(outReader)
+	go colorErrorReader(errReader)
 
-		scanner := bufio.NewScanner(outReader)
+	if err := cmd.Run(); err != nil {
+		return 1
+	}
+
+	return 0
+}
+
+func colorOutputReader(reader io.ReadCloser) {
+	defer reader.Close()
+
+	scanner := bufio.NewScanner(reader)
 
 	for scanner.Scan() {
 		line := scanner.Text()
@@ -61,12 +71,12 @@ func runGoTest() int {
 	if err := scanner.Err(); err != nil {
 		log.Printf("scanner error: %s", err)
 	}
-	}()
+}
 
-	go func() {
-		defer errReader.Close()
+func colorErrorReader(reader io.ReadCloser) {
+	defer reader.Close()
 
-		scanner := bufio.NewScanner(errReader)
+	scanner := bufio.NewScanner(reader)
 
 	for scanner.Scan() {
 		line := scanner.Text()
@@ -76,11 +86,4 @@ func runGoTest() int {
 	if err := scanner.Err(); err != nil {
 		log.Printf("scanner error: %s", err)
 	}
-	}()
-
-	if err := cmd.Run(); err != nil {
-		return 1
-	}
-
-	return 0
 }