1 /* 2 * Copyright 2016 Google LLC 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google LLC nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 package com.google.api.gax.grpc.testing; 31 32 import com.google.api.core.BetaApi; 33 import com.google.api.core.SettableApiFuture; 34 import com.google.api.gax.rpc.ApiStreamObserver; 35 import java.util.ArrayList; 36 import java.util.List; 37 38 /** An implementation of ApiStreamObserver used by testing. */ 39 @BetaApi 40 public class MockStreamObserver<T> implements ApiStreamObserver<T> { 41 42 private final SettableApiFuture<List<T>> future = SettableApiFuture.create(); 43 private final List<T> actualMessages = new ArrayList<>(); 44 45 @Override onNext(T message)46 public void onNext(T message) { 47 actualMessages.add(message); 48 } 49 50 @Override onError(Throwable t)51 public void onError(Throwable t) { 52 future.setException(t); 53 } 54 55 @Override onCompleted()56 public void onCompleted() { 57 future.set(actualMessages); 58 } 59 // Returns the SettableFuture object which can be used to retrieve received messages. future()60 public SettableApiFuture<List<T>> future() { 61 return future; 62 } 63 } 64