MappedListTest.java 文件源码

@Test
public void testListPermutation() {
    SortedList<Integer> sortedList = FXCollections.observableList(Arrays.asList(3, 7, 1, 5))
            .sorted(Comparator.naturalOrder());
    MappedList<String, Integer> mappedList = new MappedList<>(sortedList, i -> String.valueOf(i));

    assertEquals(4, mappedList.size());
    assertEquals("1", mappedList.get(0));
    assertEquals("3", mappedList.get(1));
    assertEquals("5", mappedList.get(2));
    assertEquals("7", mappedList.get(3));

    sortedList.comparatorProperty().set(Comparator.comparing(String::valueOf).reversed());

    assertEquals(4, mappedList.size());
    assertEquals("7", mappedList.get(0));
    assertEquals("5", mappedList.get(1));
    assertEquals("3", mappedList.get(2));
    assertEquals("1", mappedList.get(3));
}