hello_test.go

package main

import "testing"

func TestHello(t *testing.T) {

	assertCorrectMessage := func(t testing.TB, got, want string) {
		t.Helper()
		if got != want {
			t.Errorf("got %q want %q", got, want)
		}
	}

	t.Run("saying hello to people", func(t *testing.T) {
		got := hello("Chris", "")
		want := englishHelloPrefix + "Chris"

		assertCorrectMessage(t, got, want)
	})

	t.Run("say 'Hello, world' when an empty string is supplied", func(t *testing.T) {
		got := hello("", "")
		want := englishHelloPrefix + "world"

		assertCorrectMessage(t, got, want)
	})

	t.Run("in Spanish", func(t *testing.T) {
		got := hello("Elodie", "Spanish")
		want := "Hola, Elodie"
		assertCorrectMessage(t, got, want)
	})

	t.Run("in French", func(t *testing.T) {
		got := hello("Alex", "French")
		want := "Bon jour, Alex"
		assertCorrectMessage(t, got, want)
	})
}