reorgniaze the repo

helloworld/hello.go

@@ -0,0 +1,50 @@
+package helloworld
+
+const (
+	english = "English"
+	spanish = "Spanish"
+)
+
+var (
+	helloPrefixMap  map[string]string
+	defaultWorldMap map[string]string
+)
+
+func initDefaults() {
+	initPrefixMap()
+	initWorldMap()
+}
+
+func initPrefixMap() {
+	helloPrefixMap = make(map[string]string)
+	helloPrefixMap[english] = "Hello "
+	helloPrefixMap[spanish] = "Hola "
+}
+
+func initWorldMap() {
+	defaultWorldMap = make(map[string]string)
+	defaultWorldMap[english] = "world"
+	defaultWorldMap[spanish] = "Mundo"
+}
+
+func getDefaultWorldByLanguage(language string) string {
+	return defaultWorldMap[language]
+}
+
+func getHelloPrefixByLanguage(language string) string {
+	return helloPrefixMap[language]
+}
+
+func Hello(name, language string) string {
+	prefix := getHelloPrefixByLanguage(language)
+
+	if name == "" {
+		return prefix + getDefaultWorldByLanguage(language)
+	}
+	return prefix + name
+}
+
+// func main() {
+// 	initDefaults()
+// 	fmt.Println(Hello("Mary", "English"))
+// }

helloworld/hello_test.go

@@ -0,0 +1,31 @@
+package helloworld
+
+import "testing"
+
+func TestHello(t *testing.T) {
+	initDefaults()
+	t.Run("Hello someone", func(t *testing.T) {
+		got := Hello("Jason", "English")
+		exp := "Hello Jason"
+		assertCorrectMsg(t, got, exp)
+	})
+
+	t.Run("Hello default", func(t *testing.T) {
+		got := Hello("", "English")
+		exp := "Hello world"
+		assertCorrectMsg(t, got, exp)
+	})
+
+	t.Run("Hello default", func(t *testing.T) {
+		got := Hello("Elodie", "Spanish")
+		exp := "Hola Elodie"
+		assertCorrectMsg(t, got, exp)
+	})
+}
+
+func assertCorrectMsg(t testing.TB, got, exp string) {
+	t.Helper()
+	if got != exp {
+		t.Errorf("got %q expected %q", got, exp)
+	}
+}