@Test
public void uncapitalize() {

    Assert.assertEquals(null, StringUtil.uncapitalize(null));
    Assert.assertEquals("", StringUtil.uncapitalize(""));
    Assert.assertEquals("j", StringUtil.uncapitalize("j"));
    Assert.assertEquals("j", StringUtil.uncapitalize("J"));
    Assert.assertEquals("joe", StringUtil.uncapitalize("joe"));
    Assert.assertEquals("joe", StringUtil.uncapitalize("Joe"));
}