@Test
public void internalRenderCell() {

    assertNull(scenarioGridColumnRenderer.internalRenderCell(null, null, null, null));
    assertNull(scenarioGridColumnRenderer.internalRenderCell(scenarioGridCell, null, null, null));
    when(scenarioGridCell.getValue()).thenReturn(mock(GridCellValue.class));
    assertNull(scenarioGridColumnRenderer.internalRenderCell(scenarioGridCell, null, null, null));
}