Check composition variables in go template engine

TestTemplateCompositionStruct.go

func TestTemplateCompositionStruct(t *testing.T) {
	type Deep struct {
		Name string
	}

	type M struct {
		Deep
	}

	var b bytes.Buffer

	te, _ := template.New("").Parse("You have new alert {{.Name}}")
	data := &M{
		Deep{Name: "Something went wrong"},
	}
	te.Execute(&b, &data)

	current := b.String()
	should := "You have new alert Something went wrong"

	if current != should {
		t.Fatal(fmt.Sprintf("'%s'", current), "is not equal", fmt.Sprintf("'%s'", should))
	}
}