1/*
2 * Copyright (C) 2009 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;
18
19import com.google.common.annotations.GwtCompatible;
20import com.google.common.annotations.GwtIncompatible;
21import com.google.common.testing.EqualsTester;
22
23/**
24 * Tests {@link EmptyImmutableTable}
25 *
26 * @author Gregory Kick
27 */
28@GwtCompatible(emulated = true)
29public class EmptyImmutableTableTest extends AbstractImmutableTableTest {
30  private static final ImmutableTable<Character, Integer, String> INSTANCE = ImmutableTable.of();
31
32  @Override Iterable<ImmutableTable<Character, Integer, String>> getTestInstances() {
33    return ImmutableSet.of(INSTANCE);
34  }
35
36  public void testHashCode() {
37    assertEquals(0, INSTANCE.hashCode());
38  }
39
40  public void testEqualsObject() {
41    Table<Character, Integer, String> nonEmptyTable = HashBasedTable.create();
42    nonEmptyTable.put('A', 1, "blah");
43
44    new EqualsTester()
45        .addEqualityGroup(INSTANCE, HashBasedTable.create(), TreeBasedTable.create())
46        .addEqualityGroup(nonEmptyTable)
47        .testEquals();
48  }
49
50  @GwtIncompatible("ArrayTable")
51  public void testEqualsObjectNullValues() {
52    new EqualsTester()
53        .addEqualityGroup(INSTANCE)
54        .addEqualityGroup(ArrayTable.create(ImmutableSet.of('A'), ImmutableSet.of(1)))
55        .testEquals();
56  }
57
58  public void testToString() {
59    assertEquals("{}", INSTANCE.toString());
60  }
61
62  public void testSize() {
63    assertEquals(0, INSTANCE.size());
64  }
65
66  public void testGet() {
67    assertNull(INSTANCE.get('a', 1));
68  }
69
70  public void testIsEmpty() {
71    assertTrue(INSTANCE.isEmpty());
72  }
73
74  public void testCellSet() {
75    assertEquals(ImmutableSet.of(), INSTANCE.cellSet());
76  }
77
78  public void testColumn() {
79    assertEquals(ImmutableMap.of(), INSTANCE.column(1));
80  }
81
82  public void testColumnKeySet() {
83    assertEquals(ImmutableSet.of(), INSTANCE.columnKeySet());
84  }
85
86  public void testColumnMap() {
87    assertEquals(ImmutableMap.of(), INSTANCE.columnMap());
88  }
89
90  public void testContains() {
91    assertFalse(INSTANCE.contains('a', 1));
92  }
93
94  public void testContainsColumn() {
95    assertFalse(INSTANCE.containsColumn(1));
96  }
97
98  public void testContainsRow() {
99    assertFalse(INSTANCE.containsRow('a'));
100  }
101
102  public void testContainsValue() {
103    assertFalse(INSTANCE.containsValue("blah"));
104  }
105
106  public void testRow() {
107    assertEquals(ImmutableMap.of(), INSTANCE.row('a'));
108  }
109
110  public void testRowKeySet() {
111    assertEquals(ImmutableSet.of(), INSTANCE.rowKeySet());
112  }
113
114  public void testRowMap() {
115    assertEquals(ImmutableMap.of(), INSTANCE.rowMap());
116  }
117
118  public void testValues() {
119    assertTrue(INSTANCE.values().isEmpty());
120  }
121}
122