@DataProvider(name = "sampleToString")
  Object[][] provider_sampleToString() {

    return new Object[][] { { 2008, 7, 5, "2008-07-05" }, { 2007, 12, 31, "2007-12-31" },
        { 999, 12, 31, "0999-12-31" }, { -1, 1, 2, "-0001-01-02" }, { 9999, 12, 31, "9999-12-31" },
        { -9999, 12, 31, "-9999-12-31" }, { 10000, 1, 1, "+10000-01-01" }, { -10000, 1, 1, "-10000-01-01" },
        { 12345678, 1, 1, "+12345678-01-01" }, { -12345678, 1, 1, "-12345678-01-01" }, };
  }

  @Test(dataProvider = "sampleToString", groups = { "tck" }