001/*
002 * Copyright (C) 2007 The Guava Authors
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package com.google.common.collect.testing.testers;
018
019import static com.google.common.collect.testing.features.CollectionSize.ZERO;
020
021import com.google.common.annotations.GwtCompatible;
022import com.google.common.collect.testing.AbstractMapTester;
023import com.google.common.collect.testing.features.CollectionSize;
024import org.junit.Ignore;
025
026/**
027 * A generic JUnit test which tests {@code isEmpty()} operations on a map. Can't be invoked
028 * directly; please see {@link com.google.common.collect.testing.MapTestSuiteBuilder}.
029 *
030 * @author Kevin Bourrillion
031 */
032@GwtCompatible
033@Ignore("test runners must not instantiate and run this directly, only via suites we build")
034// @Ignore affects the Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
035@SuppressWarnings("JUnit4ClassUsedInJUnit3")
036public class MapIsEmptyTester<K, V> extends AbstractMapTester<K, V> {
037  @CollectionSize.Require(ZERO)
038  public void testIsEmpty_yes() {
039    assertTrue("isEmpty() should return true", getMap().isEmpty());
040  }
041
042  @CollectionSize.Require(absent = ZERO)
043  public void testIsEmpty_no() {
044    assertFalse("isEmpty() should return false", getMap().isEmpty());
045  }
046}