@Test
public void testShow() throws Exception {

    presenter.show();
    assertEquals(1, presenter.panels.size());
    assertEquals(dataSetPanel, presenter.panels.get(0));
    verify(view, times(1)).clear();
    verify(view, times(1)).addPanel(any(DataSetPanel.View.class));
    verify(dataSetPanel, times(1)).show(dataSetDef, "dataSetsExplorerPanelGroup");
}