1 /* 2 * Copyright (C) 2007 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.collect.testing.testers; 18 19 import static com.google.common.collect.testing.features.CollectionSize.ZERO; 20 21 import com.google.common.collect.testing.AbstractCollectionTester; 22 import com.google.common.collect.testing.features.CollectionSize; 23 24 /** 25 * A generic JUnit test which tests {@code isEmpty()} operations on a 26 * collection. Can't be invoked directly; please see 27 * {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}. 28 * 29 * <p>This class is GWT compatible. 30 * 31 * @author Kevin Bourrillion 32 */ 33 public class CollectionIsEmptyTester<E> extends AbstractCollectionTester<E> { 34 @CollectionSize.Require(ZERO) 35 public void testIsEmpty_yes() { 36 assertTrue("isEmpty() should return true", collection.isEmpty()); 37 } 38 39 @CollectionSize.Require(absent = ZERO) 40 public void testIsEmpty_no() { 41 assertFalse("isEmpty() should return false", collection.isEmpty()); 42 } 43 } 44
