diff --git a/wicket/src/test/java/org/apache/wicket/VisitorTest.java b/wicket/src/test/java/org/apache/wicket/VisitorTest.java new file mode 100644 index 00000000000..835923d5082 --- /dev/null +++ b/wicket/src/test/java/org/apache/wicket/VisitorTest.java @@ -0,0 +1,157 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.wicket; + +import junit.framework.Assert; + +import org.apache.wicket.Component.IVisitor; +import org.apache.wicket.markup.html.WebMarkupContainer; +import org.apache.wicket.markup.html.form.FormComponent; + +/** + * + * A + * +-B + * +-C + * | +-D + * | +-E + * | +-F + * +-G + * + * + * @author igor.vaynberg + */ +public class VisitorTest extends WicketTestCase +{ + + public void testContinueTraversal() + { + final StringBuilder path = new StringBuilder(); + + TestContainer container = new TestContainer(); + container.visitChildren(new IVisitor() + { + public Object component(Component component) + { + path.append(component.getId()); + return CONTINUE_TRAVERSAL; + } + }); + + Assert.assertEquals("BCDEFG", path.toString()); + } + + public void testContinuePostOrder() + { + final StringBuilder path = new StringBuilder(); + + TestContainer container = new TestContainer(); + FormComponent.visitComponentsPostOrder(container, new IVisitor() + { + public Object component(Component component) + { + path.append(component.getId()); + return CONTINUE_TRAVERSAL; + } + }); + + Assert.assertEquals("BDFECGA", path.toString()); + } + + public void testDoNotGoDeeper1() + { + final StringBuilder path = new StringBuilder(); + + TestContainer container = new TestContainer(); + Object result = container.visitChildren(new IVisitor() + { + public Object component(Component component) + { + path.append(component.getId()); + if ("D".equals(component.getId())) + { + return "RESULT"; + } + return CONTINUE_TRAVERSAL; + } + }); + Assert.assertEquals("BCD", path.toString()); + Assert.assertEquals("RESULT", result); + } + + public void testStop() + { + final StringBuilder path = new StringBuilder(); + + TestContainer container = new TestContainer(); + container.visitChildren(new IVisitor() + { + public Object component(Component component) + { + path.append(component.getId()); + if ("C".equals(component.getId())) + { + return CONTINUE_TRAVERSAL_BUT_DONT_GO_DEEPER; + } + return CONTINUE_TRAVERSAL; + } + }); + Assert.assertEquals("BCG", path.toString()); + } + + public void testDoNotGoDeeper2() + { + final StringBuilder path = new StringBuilder(); + + TestContainer container = new TestContainer(); + container.visitChildren(new IVisitor() + { + public Object component(Component component) + { + path.append(component.getId()); + if ("E".equals(component.getId())) + { + return CONTINUE_TRAVERSAL_BUT_DONT_GO_DEEPER; + } + return CONTINUE_TRAVERSAL; + } + }); + Assert.assertEquals("BCDEG", path.toString()); + } + + + private static class TestContainer extends WebMarkupContainer + { + public TestContainer() + { + super("A"); + WebMarkupContainer b = new WebMarkupContainer("B"); + WebMarkupContainer c = new WebMarkupContainer("C"); + WebMarkupContainer d = new WebMarkupContainer("D"); + WebMarkupContainer e = new WebMarkupContainer("E"); + WebMarkupContainer f = new WebMarkupContainer("F"); + WebMarkupContainer g = new WebMarkupContainer("G"); + add(b); + add(c); + c.add(d); + c.add(e); + e.add(f); + add(g); + } + + } +}