1 /* 2 * Copyright (C) 2016 The Android Open Source Project 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.android.documentsui.testing; 18 19 import static junit.framework.Assert.assertFalse; 20 import static org.junit.Assert.assertEquals; 21 import static org.junit.Assert.assertTrue; 22 23 import com.android.documentsui.base.EventHandler; 24 import com.android.documentsui.base.EventListener; 25 26 import javax.annotation.Nullable; 27 28 /** 29 * Test {@link EventHandler} that can be used to spy on, control responses from, 30 * and make assertions against values tested. 31 */ 32 public class TestEventListener<T> implements EventListener<T> { 33 34 private @Nullable T lastValue; 35 private boolean called; 36 37 @Override accept(T event)38 public void accept(T event) { 39 called = true; 40 lastValue = event; 41 } 42 assertLastArgument(@ullable T expected)43 public void assertLastArgument(@Nullable T expected) { 44 assertEquals(expected, lastValue); 45 } 46 assertCalled()47 public void assertCalled() { 48 assertTrue(called); 49 } 50 assertNotCalled()51 public void assertNotCalled() { 52 assertFalse(called); 53 } 54 getLastValue()55 public T getLastValue() { 56 return lastValue; 57 } 58 } 59