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      1 /*
      2  * Copyright (C) 2011 The Guava Authors
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  * http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.google.common.util.concurrent;
     18 
     19 import static org.easymock.EasyMock.createMock;
     20 import static org.easymock.EasyMock.expect;
     21 import static org.easymock.EasyMock.replay;
     22 import static org.easymock.EasyMock.verify;
     23 
     24 import com.google.common.util.concurrent.ForwardingCheckedFuture.SimpleForwardingCheckedFuture;
     25 
     26 import junit.framework.TestCase;
     27 
     28 import java.io.IOException;
     29 import java.util.concurrent.TimeUnit;
     30 import java.util.concurrent.TimeoutException;
     31 
     32 /**
     33  * Test for {@link ForwardingCheckedFuture}
     34  *
     35  * @author Anthony Zana
     36  */
     37 public class ForwardingCheckedFutureTest extends TestCase {
     38   private static final String VALUE = "delegated";
     39   private static final TimeUnit TIME_UNIT = TimeUnit.MILLISECONDS;
     40 
     41   @SuppressWarnings("unchecked")
     42   private CheckedFuture<String, IOException> delegate =
     43       createMock(CheckedFuture.class);
     44 
     45   private TestDelegateFuture forwarded = new TestDelegateFuture();
     46   private TestSimpleFuture simple = new TestSimpleFuture();
     47 
     48   public void testCheckedGet() throws IOException {
     49     expect(delegate.checkedGet()).andReturn(VALUE).times(2);
     50     replay(delegate);
     51     assertEquals(VALUE, forwarded.checkedGet());
     52     assertEquals(VALUE, simple.checkedGet());
     53     verify(delegate);
     54   }
     55 
     56   public void testTimedCheckedGet() throws TimeoutException, IOException {
     57     expect(delegate.checkedGet(100, TIME_UNIT)).andReturn(VALUE).times(2);
     58     replay(delegate);
     59     assertEquals(VALUE, forwarded.checkedGet(100, TIME_UNIT));
     60     assertEquals(VALUE, simple.checkedGet(100, TIME_UNIT));
     61     verify(delegate);
     62   }
     63 
     64   public void testTimedCheckedGet_timeout()
     65       throws IOException, TimeoutException {
     66     expect(delegate.checkedGet(100, TIME_UNIT))
     67         .andThrow(new TimeoutException()).times(2);
     68     replay(delegate);
     69     try {
     70       forwarded.checkedGet(100, TIME_UNIT);
     71       fail();
     72     } catch (TimeoutException expected) {}
     73     try {
     74       simple.checkedGet(100, TIME_UNIT);
     75       fail();
     76     } catch (TimeoutException expected) {}
     77     verify(delegate);
     78   }
     79 
     80   public void testCheckedGetException() throws IOException {
     81     IOException expected = new IOException("expected");
     82     expect(delegate.checkedGet()).andThrow(expected).times(2);
     83     replay(delegate);
     84     try {
     85       delegate.checkedGet();
     86       fail();
     87     } catch (IOException e) {
     88       assertEquals(expected.getMessage(), e.getMessage());
     89     }
     90     try {
     91       simple.checkedGet();
     92       fail();
     93     } catch (IOException e) {
     94       assertEquals(expected.getMessage(), e.getMessage());
     95     }
     96     verify(delegate);
     97   }
     98 
     99   private class TestDelegateFuture
    100       extends ForwardingCheckedFuture<String, IOException> {
    101     @Override
    102     protected CheckedFuture<String, IOException> delegate() {
    103       return delegate;
    104     }
    105   }
    106 
    107   private class TestSimpleFuture
    108       extends SimpleForwardingCheckedFuture<String, IOException> {
    109     public TestSimpleFuture() {
    110       super(delegate);
    111     }
    112   }
    113 
    114 }
    115