@Test
public void getSize() {

    ListValue lv = PropertyValue.createList();
    assertThat(0).isEqualTo(lv.getSize());
    PropertyValue val = new PropertyValue(  "k", "v");
    lv.addPropertyValue(val);
    assertThat(1).isEqualTo(lv.getSize());
    PropertyValue val2 = new PropertyValue(  "k", "v");
    lv.addPropertyValue(val2);
    assertThat(2).isEqualTo(lv.getSize());
}