Move to subfolder

hello/hello_test.go

@@ -0,0 +1,33 @@
+package main
+
+import "testing"
+
+func TestHello(t *testing.T) {
+	t.Run("saying hello to people", func(t *testing.T) {
+		got := Hello("Hoborg", "")
+		want := "Hello, Hoborg"
+		assertMessage(t, got, want)
+	})
+	t.Run("say 'Hello, World' when an empty string is given", func(t *testing.T) {
+		got := Hello("", "")
+		want := "Hello, World"
+		assertMessage(t, got, want)
+	})
+	t.Run("hello in Spanish", func(t *testing.T) {
+		got := Hello("Elodie", "Spanish")
+		want := "Hola, Elodie"
+		assertMessage(t, got, want)
+	})
+	t.Run("hello in French", func(t *testing.T) {
+		got := Hello("Émile", "French")
+		want := "Bonjour, Émile"
+		assertMessage(t, got, want)
+	})
+}
+
+func assertMessage(t testing.TB, got, want string) {
+	t.Helper()
+	if got != want {
+		t.Errorf("got %q want %q", got, want)
+	}
+}