| /* |
| * Copyright (C) 2012 The Guava Authors |
| * |
| * 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.common.util.concurrent; |
| |
| import static org.mockito.Answers.CALLS_REAL_METHODS; |
| import static org.mockito.Mockito.doReturn; |
| import static org.mockito.Mockito.mock; |
| |
| import com.google.common.base.Function; |
| import com.google.common.collect.ForwardingObject; |
| import com.google.common.collect.Iterables; |
| import com.google.common.testing.ForwardingWrapperTester; |
| import java.lang.reflect.Method; |
| import java.util.Arrays; |
| |
| /** |
| * Tester for typical subclass of {@link ForwardingObject} by using EasyMock partial mocks. |
| * |
| * @author Ben Yu |
| */ |
| final class ForwardingObjectTester { |
| |
| private static final Method DELEGATE_METHOD; |
| |
| static { |
| try { |
| DELEGATE_METHOD = ForwardingObject.class.getDeclaredMethod("delegate"); |
| DELEGATE_METHOD.setAccessible(true); |
| } catch (SecurityException e) { |
| throw new RuntimeException(e); |
| } catch (NoSuchMethodException e) { |
| throw new AssertionError(e); |
| } |
| } |
| |
| /** |
| * Ensures that all interface methods of {@code forwarderClass} are forwarded to the {@link |
| * ForwardingObject#delegate}. {@code forwarderClass} is assumed to only implement one interface. |
| */ |
| static <T extends ForwardingObject> void testForwardingObject(final Class<T> forwarderClass) { |
| @SuppressWarnings("unchecked") // super interface type of T |
| Class<? super T> interfaceType = |
| (Class<? super T>) Iterables.getOnlyElement(Arrays.asList(forwarderClass.getInterfaces())); |
| new ForwardingWrapperTester() |
| .testForwarding( |
| interfaceType, |
| new Function<Object, T>() { |
| @Override |
| public T apply(Object delegate) { |
| T mock = mock(forwarderClass, CALLS_REAL_METHODS.get()); |
| try { |
| T stubber = doReturn(delegate).when(mock); |
| DELEGATE_METHOD.invoke(stubber); |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| return mock; |
| } |
| }); |
| } |
| } |