swant := fmt.Sprintf("%+v", want)
	sgot := fmt.Sprintf("%+v", got)
	if swant == sgot {
		return ""
	}
	return fmt.Sprintf("wanted %q got %q", swant, sgot)
}

func TestMetaDataEmptyPackage(t *testing.T) {
	// Make sure that encoding/decoding works properly with packages
	// that don't actually have any functions.
	p := "empty/package"
	pn := "package"
	mp := "m"