@Test
public void moveColumnIntoViewportByMovingLeftAndRight() throws Exception {
// width of each column = 80
// total width = 800
// client area width = 200 = 80 + 80 + 40
this.viewportLayer = new ViewportLayerFixture(10, 5, 80, 40);
assertEquals(200, this.viewportLayer.getClientAreaWidth());
assertEquals(3, this.viewportLayer.getColumnCount());
this.viewportLayer.setOriginX(600);
assertEquals(3, this.viewportLayer.getColumnCount());