Testing in Go

go/hello.go

@@ -2,6 +2,28 @@ package main
 
 import "fmt"
 
-func main() {
-	fmt.Println("Hello, World")
+const englishHelloPrefix = "Hello, "
+const welsh = "Welsh"
+const welshHelloPrefix = "Helo, "
+
+func Hello(name string, language string) string {
+	if name == "" {
+		name = "World"
+	}
+
+	return greetingPrefix(language) + name
+}
+
+func greetingPrefix(language string) (prefix string) {
+	prefix = englishHelloPrefix
+
+	if language == welsh {
+		prefix = welshHelloPrefix
+	}
+
+	return
+}
+
+func main() {
+	fmt.Println(Hello("Oliver", ""))
 }