@Test
public void perform_CellSelected() {

    when(scenarioGridModelMock.getSelectedCells()).thenReturn(Arrays.asList(selectedCell));
    when(scenarioGridModelMock.getSelectedHeaderCells()).thenReturn(Collections.emptyList());
    when(scenarioGridModelMock.getSelectedCellsOrigin()).thenReturn(selectedCell);
    handler.perform(scenarioGridMock, false, false);
    verify(scenarioContextMenuRegistry, times(1)).manageRightClick(eq(scenarioGridMock), eq(0), eq(0), anyInt(), anyInt(), eq(false));
}