@Test
public void testGetArray () {

    // fill all four slots ...
    PROVIDER.getArray(1);
    PROVIDER.getArray(2);
    PROVIDER.getArray(3);
    PROVIDER.getArray(4);
    // ... and test
    final byte[][] arrays = PROVIDER.getAll();
    for (int i = 0; i < CAPACITY; ++i)
        assertEquals(arrays[i].length, i + 1);// [1][2][3][4]
    // move last element to the front (3 swaps) ...
    for (int i = 0; i < 3; ++i)
        PROVIDER.getArray(4);
    // ... and test
    assert (arrays[0].length == 4);// [4][1][2][3]
    for (int i = 1; i < CAPACITY; ++i)
        assertEquals(arrays[i].length, i);
    // replace last element
    PROVIDER.getArray(5);// [4][1][2][5]
    assertEquals(4, arrays[0].length);
    assertEquals(1, arrays[1].length);
    assertEquals(2, arrays[2].length);
    assertEquals(5, arrays[3].length);
}