container.add(new EmptyBlock(30.0, 6.0));
Size2D size = container.arrange(g2, constraint);
assertEquals(60.0, size.width, EPSILON);
assertEquals(6.0, size.height, EPSILON);
container.clear();
container.add(new EmptyBlock(10.0, 6.0), RectangleEdge.LEFT);
container.add(new EmptyBlock(20.0, 6.0), RectangleEdge.RIGHT);
container.add(new EmptyBlock(300.0, 6.0));
size = container.arrange(g2, constraint);
assertEquals(200.0, size.width, EPSILON);