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/*
* Copyright (C) 2008 The Android Open Source Project
*
* 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.android.internal.util;
import junit.framework.TestCase;
import java.util.ArrayList;
import java.util.Collections;
public class PredicatesTest extends TestCase {
private static final Predicate<Object> TRUE = new Predicate<Object>() {
public boolean apply(Object o) {
return true;
}
};
private static final Predicate<Object> FALSE = new Predicate<Object>() {
public boolean apply(Object o) {
return false;
}
};
public void testAndPredicate_AllConditionsTrue() throws Exception {
assertTrue(Predicates.and(newArrayList(TRUE)).apply(null));
assertTrue(Predicates.and(newArrayList(TRUE, TRUE)).apply(null));
}
public void testAndPredicate_AtLeastOneConditionIsFalse() throws Exception {
assertFalse(Predicates.and(newArrayList(FALSE, TRUE, TRUE)).apply(null));
assertFalse(Predicates.and(newArrayList(TRUE, FALSE, TRUE)).apply(null));
assertFalse(Predicates.and(newArrayList(TRUE, TRUE, FALSE)).apply(null));
}
public void testOrPredicate_AllConditionsTrue() throws Exception {
assertTrue(Predicates.or(newArrayList(TRUE, TRUE, TRUE)).apply(null));
}
public void testOrPredicate_AllConditionsFalse() throws Exception {
assertFalse(Predicates.or(newArrayList(FALSE, FALSE, FALSE)).apply(null));
}
public void testOrPredicate_AtLeastOneConditionIsTrue() throws Exception {
assertTrue(Predicates.or(newArrayList(TRUE, FALSE, FALSE)).apply(null));
assertTrue(Predicates.or(newArrayList(FALSE, TRUE, FALSE)).apply(null));
assertTrue(Predicates.or(newArrayList(FALSE, FALSE, TRUE)).apply(null));
}
public void testNotPredicate() throws Exception {
assertTrue(Predicates.not(FALSE).apply(null));
assertFalse(Predicates.not(TRUE).apply(null));
}
private static <E> ArrayList<E> newArrayList(E... elements) {
ArrayList<E> list = new ArrayList<E>();
Collections.addAll(list, elements);
return list;
}
}
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