feat: complete hello world with greetingPrefix and test

src/001-hello-world/hello.go

@@ -2,16 +2,32 @@ package main
 
 import "fmt"
 
-const englishHelloPrefix = "Hello, "
+const (
+	englishHelloPrefix = "Hello, "
+	spanishHelloPrefix = "Hola, "
+	frenchHelloPrefix  = "Bonjour, "
+)
 
 func main() {
-	fmt.Println(Hello(""))
+	fmt.Println(Hello("", ""))
+}
+
+// greetingPrefix returns a string containingthe greeting prefix for the given language
+func greetingPrefix(language string) string {
+	switch language {
+	case "Spanish":
+		return spanishHelloPrefix
+	case "French":
+		return frenchHelloPrefix
+	default:
+		return englishHelloPrefix
+	}
 }
 
 // Hello returns a string
-func Hello(name string) string {
-	if name== "" {
-		return englishHelloPrefix + "World"
+func Hello(name string, language string) string {
+	if name == "" {
+		name = "World"
 	}
-	return englishHelloPrefix + name
+	return greetingPrefix(language) + name
 }

src/001-hello-world/hello_test.go

@@ -3,22 +3,27 @@ package main
 import "testing"
 
 func TestHello(t *testing.T) {
-
-	assertCorrectMessage := func(got string, want string){
+	assertCorrectMessage := func(got string, want string) {
 		t.Helper()
 		if got != want {
 			t.Errorf("Expected %q, got %q", want, got)
 		}
 	}
 	t.Run("saying hello to people", func(t *testing.T) {
-		got := Hello("Chris")
+		got := Hello("Chris","")
 		want := "Hello, Chris"
 		assertCorrectMessage(got, want)
 	})
 
 	t.Run("say 'Hello, World' when an empty string is supplied", func(t *testing.T) {
-		got := Hello("")
+		got := Hello("","")
 		want := "Hello, World"
 		assertCorrectMessage(got, want)
 	})
+
+	t.Run("in Spanish", func(t *testing.T) {
+		got := Hello("Elodie", "Spanish")
+		want := "Hola, Elodie"
+		assertCorrectMessage(got, want)
+	})
 }