1 /* 2 * Copyright (C) 2008 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.internal.util; 18 19 import junit.framework.TestCase; 20 21 import java.util.ArrayList; 22 import java.util.Collections; 23 24 public class PredicatesTest extends TestCase { 25 26 private static final Predicate<Object> TRUE = new Predicate<Object>() { 27 public boolean apply(Object o) { 28 return true; 29 } 30 }; 31 32 private static final Predicate<Object> FALSE = new Predicate<Object>() { 33 public boolean apply(Object o) { 34 return false; 35 } 36 }; 37 38 public void testAndPredicate_AllConditionsTrue() throws Exception { 39 assertTrue(Predicates.and(newArrayList(TRUE)).apply(null)); 40 assertTrue(Predicates.and(newArrayList(TRUE, TRUE)).apply(null)); 41 } 42 43 public void testAndPredicate_AtLeastOneConditionIsFalse() throws Exception { 44 assertFalse(Predicates.and(newArrayList(FALSE, TRUE, TRUE)).apply(null)); 45 assertFalse(Predicates.and(newArrayList(TRUE, FALSE, TRUE)).apply(null)); 46 assertFalse(Predicates.and(newArrayList(TRUE, TRUE, FALSE)).apply(null)); 47 } 48 49 public void testOrPredicate_AllConditionsTrue() throws Exception { 50 assertTrue(Predicates.or(newArrayList(TRUE, TRUE, TRUE)).apply(null)); 51 } 52 53 public void testOrPredicate_AllConditionsFalse() throws Exception { 54 assertFalse(Predicates.or(newArrayList(FALSE, FALSE, FALSE)).apply(null)); 55 } 56 57 public void testOrPredicate_AtLeastOneConditionIsTrue() throws Exception { 58 assertTrue(Predicates.or(newArrayList(TRUE, FALSE, FALSE)).apply(null)); 59 assertTrue(Predicates.or(newArrayList(FALSE, TRUE, FALSE)).apply(null)); 60 assertTrue(Predicates.or(newArrayList(FALSE, FALSE, TRUE)).apply(null)); 61 } 62 63 public void testNotPredicate() throws Exception { 64 assertTrue(Predicates.not(FALSE).apply(null)); 65 assertFalse(Predicates.not(TRUE).apply(null)); 66 } 67 68 private static <E> ArrayList<E> newArrayList(E... elements) { 69 ArrayList<E> list = new ArrayList<E>(); 70 Collections.addAll(list, elements); 71 return list; 72 } 73 74 } 75
