/**
* Chaining engines with a replacement test for {@link
* NodeEngine#chain(com.github.wuic.engine.NodeEngine...)}.
*/
@Test
public void chainReplaceWithLast() {
final NodeEngine engine1 = new SpriteInspectorEngine(false, new SpriteProvider[] {});
final NodeEngine engine2 = new ImageAggregatorEngine(false, new BinPacker<ConvertibleNut>());
final NodeEngine engine3 = new ImageCompressorEngine(false);
final NodeEngine engine4 = new ImageAggregatorEngine(false, new BinPacker<ConvertibleNut>());
final NodeEngine chain = NodeEngine.chain(engine1, engine2, engine3);
assertChainTest(NodeEngine.chain(chain, engine4), engine1, engine4, engine3);
}
/** Union test for {@link NodeEngine#chain(com.github.wuic.engine.NodeEngine...)}. */
@Test
public void chainUnionTest() {
final NodeEngine engine1 = new SpriteInspectorEngine(false, new SpriteProvider[] {});
final NodeEngine engine2 = new ImageAggregatorEngine(false, new BinPacker<ConvertibleNut>());
final NodeEngine engine3 = new ImageCompressorEngine(false);
assertChainTest(
NodeEngine.chain(NodeEngine.chain(engine1, engine2), NodeEngine.chain(engine2, engine3)),
engine1,
engine2,
engine3);
}
/**
* Tests some assertions on given engines.
*
* @param chain the chain of engines
* @param e1 first engine in chain
* @param e2 second engine in chain
* @param e3 third engine in chain
*/
private void assertChainTest(
final NodeEngine chain, final NodeEngine e1, final NodeEngine e2, final NodeEngine e3) {
// Test null/not null assertion on next and previous
Assert.assertNull(chain.getPrevious());
Assert.assertNotNull(chain.getNext());
Assert.assertNotNull(chain.getNext().getNext());
Assert.assertNotNull(chain.getNext().getPrevious());
Assert.assertNotNull(chain.getNext().getNext().getPrevious());
Assert.assertNull(chain.getNext().getNext().getNext());
// Test right position in the chain
Assert.assertEquals(chain, e1);
Assert.assertEquals(chain.getNext(), e2);
Assert.assertEquals(chain.getNext().getNext(), e3);
Assert.assertEquals(chain.getNext().getPrevious(), e1);
Assert.assertEquals(chain.getNext().getNext().getPrevious(), e2);
Assert.assertTrue(e1.compareTo(e2) < 0);
Assert.assertTrue(e2.compareTo(e3) < 0);
Assert.assertTrue(e3.compareTo(e2) > 0);
Assert.assertTrue(e2.compareTo(e1) > 0);
}