  @Test
  public void testFormatCommon() {

    Assert.assertNull("Should be null", this.phoneNumberUtil.formatCommon((PhoneNumberData) null));
    for (final Entry<PhoneNumberInterface, String> testCase : PhoneNumberUtilTestCases
        .getFormatCommonCases().entrySet()) {
      final String formatedNumber = this.phoneNumberUtil.formatCommon(testCase.getKey());
      Assert.assertEquals("Formating common " + testCase.getKey().toString(), testCase.getValue(),
          formatedNumber);
    }
  }