@Test
public void testNames() {

    String[] names = null;
    Metadata meta = new Metadata();
    names = meta.names();
    assertEquals(0, names.length);
    meta.add("name-one", "value");
    names = meta.names();
    assertEquals(1, names.length);
    assertEquals("name-one", names[0]);
    meta.add("name-two", "value");
    names = meta.names();
    assertEquals(2, names.length);
}