@Test
  public void vat_due_date_is_28_aug_if_low_turn_over() {
    LocalDate expected = LocalDate.parse("2016-08-28");

    VatRules vatRules = new VatRules();

    LocalDate actual = vatRules.getVatDueDate("8020120682");

    assertThat(actual, is(expected));
  }
  @Test
  public void vat_due_date_is_28_feb_if_invoicing_in_eu() {
    LocalDate expected = LocalDate.parse("2016-02-28");

    VatRules vatRules = new VatRules();

    LocalDate actual = vatRules.getVatDueDate("5569215576");

    assertThat(actual, is(expected));
  }