@Test
  public void containsId_tableAddedItemRemoved_returnsFalse() throws SQLException {
    Object id = container.addItem();

    assertTrue(container.containsId(id));
    assertTrue(container.removeItem(id));
    Assert.assertFalse(container.containsId(id));
  }
  @Test
  public void allIdsFound_table5000RowsLastId_shouldSucceed() throws SQLException {
    DataGenerator.addFiveThousandPeople(connectionPool);

    for (int i = 0; i < 5000; i++) {
      assertTrue(container.containsId(container.getIdByIndex(i)));
    }
  }
  @Test
  public void removeItem_tableOneAddedItem_removesTheAddedItem() throws SQLException {
    Object id = container.addItem();
    int size = container.size();

    assertTrue(container.removeItem(id));
    Assert.assertFalse(container.containsId(id));
    assertEquals(size - 1, container.size());
  }
  @Test
  public void addFilter_tableBufferedItems_alsoFiltersBufferedItems() throws SQLException {
    // Ville, Kalle, Pelle, Börje
    assertEquals(4, container.size());
    assertEquals("Börje", container.getContainerProperty(container.lastItemId(), NAME).getValue());

    Object id1 = container.addItem();
    container.getContainerProperty(id1, NAME).setValue("Palle");
    Object id2 = container.addItem();
    container.getContainerProperty(id2, NAME).setValue("Bengt");

    container.addContainerFilter(new Like(NAME, "%lle"));

    // Ville, Kalle, Pelle, Palle
    assertEquals(4, container.size());
    assertEquals(
        "Ville", container.getContainerProperty(container.getIdByIndex(0), NAME).getValue());
    assertEquals(
        "Kalle", container.getContainerProperty(container.getIdByIndex(1), NAME).getValue());
    assertEquals(
        "Pelle", container.getContainerProperty(container.getIdByIndex(2), NAME).getValue());
    assertEquals(
        "Palle", container.getContainerProperty(container.getIdByIndex(3), NAME).getValue());

    try {
      container.getIdByIndex(4);
      Assert.fail(
          "SQLContainer.getIdByIndex() returned a value for an index beyond the end of the container");
    } catch (IndexOutOfBoundsException e) {
      // should throw exception - item is filtered out
    }
    Assert.assertNull(container.nextItemId(container.getIdByIndex(3)));

    Assert.assertFalse(container.containsId(id2));
    Assert.assertFalse(container.getItemIds().contains(id2));

    Assert.assertNull(container.getItem(id2));
    assertEquals(-1, container.indexOfId(id2));

    Assert.assertNotSame(id2, container.lastItemId());
    Assert.assertSame(id1, container.lastItemId());
  }
  @Test
  public void containsId_tableNewlyAddedItem_returnsTrue() throws SQLException {
    Object id = container.addItem();

    assertTrue(container.containsId(id));
  }
 @Test
 public void containerDoesNotContainId() {
   assertFalse(container.containsId(nonExistingItemId));
 }
 @Test
 public void containerContainsId() {
   assertTrue(container.containsId(existingItemId));
 }