@Test
public void testCapitalizeFully_String() {

    assertEquals(null, capitalizeFully(null));
    assertEquals("", capitalizeFully(""));
    assertEquals("  ", capitalizeFully("  "));
    assertEquals("I", capitalizeFully("I"));
    assertEquals("I", capitalizeFully("i"));
    assertEquals("I Am Here 123", capitalizeFully("i am here 123"));
    assertEquals("I Am Here 123", capitalizeFully("I Am Here 123"));
    assertEquals("I Am Here 123", capitalizeFully("i am HERE 123"));
    assertEquals("I Am Here 123", capitalizeFully("I AM HERE 123"));
}