hello_test.go

package main

import "testing"

func TestHello(t *testing.T) {

	assertCorrectMessage := func(t *testing.T, got, want string) {
		// is needed to tell the test suite that this method is a helper.
		// By doing this when it fails the line number reported will be in our function
		// call rather than inside our test helper.
		t.Helper()
		if got != want {
			t.Errorf("got '%s' want '%s'", got, want)
		}
	}

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

	t.Run("empty string defaults to 'World'", func(t *testing.T) {
		got := Hello("", "")
		want := "Hello, 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("Elodie", "French")
		want := "Bonjour, Elodie"
		assertCorrectMessage(t, got, want)
	})

	t.Run("in Arabic", func(t *testing.T) {
		got := Hello("Elodie", "Arabic")
		want := "أهلا, Elodie"
		assertCorrectMessage(t, got, want)
	})
}