MapIsEmptyTester.java revision 7dd252788645e940eada959bdde927426e2531c9 
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
17package com.google.common.collect.testing.testers;
18
19import static com.google.common.collect.testing.features.CollectionSize.ZERO;
20
21import com.google.common.annotations.GwtCompatible;
22import com.google.common.collect.testing.AbstractMapTester;
23import com.google.common.collect.testing.features.CollectionSize;
24
25/**
26 * A generic JUnit test which tests {@code isEmpty()} operations on a
27 * map. Can't be invoked directly; please see
28 * {@link com.google.common.collect.testing.MapTestSuiteBuilder}.
29 *
30 * <p>This class is GWT compatible.
31 *
32 * @author Kevin Bourrillion
33 */
34@GwtCompatible
35public class MapIsEmptyTester<K, V> extends AbstractMapTester<K, V> {
36  @CollectionSize.Require(ZERO)
37  public void testIsEmpty_yes() {
38    assertTrue("isEmpty() should return true", getMap().isEmpty());
39  }
40
41  @CollectionSize.Require(absent = ZERO)
42  public void testIsEmpty_no() {
43    assertFalse("isEmpty() should return false", getMap().isEmpty());
44  }
45}
46