| /* |
| * Copyright 2011 Google Inc. |
| * |
| * Licensed 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 com.google.gwt.junit; |
| |
| import com.google.gwt.resources.client.CssResource; |
| |
| import java.lang.reflect.InvocationHandler; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Proxy; |
| |
| /** |
| * Helper to make a fake implementation of any {@link CssResource} interface via |
| * reflection, for use in JUnit tests. (This will not work in GWTTestCase.) All |
| * calls to the returned object (other than ensureInjected) return the method |
| * name. |
| * <p> |
| * Sample use: |
| * |
| * <pre>interface MyCss extends CssResource { |
| * String myStyleName(); |
| * } |
| * |
| * public void testSimple() { |
| * MyCss myCss = FakeCssMaker.create(MyCss.class); |
| * assertEquals("myStyleName", messages.myMessage()); |
| * } |
| * </pre> |
| */ |
| public class FakeCssMaker implements InvocationHandler { |
| public static <T extends CssResource> T create(Class<T> cssClass) { |
| return cssClass.cast(Proxy.newProxyInstance( |
| FakeCssMaker.class.getClassLoader(), new Class[] {cssClass}, |
| new FakeCssMaker())); |
| } |
| |
| public Object invoke(Object proxy, Method method, Object[] args) |
| throws Throwable { |
| if (method.getName().equals("ensureInjected") |
| && method.getParameterTypes().length == 0) { |
| return false; |
| } |
| return method.getName(); |
| } |
| } |