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17 package org.apache.commons.lang3.tuple;
18
19 import static org.apache.commons.lang3.LangAssertions.assertNullPointerException;
20 import static org.junit.jupiter.api.Assertions.assertEquals;
21 import static org.junit.jupiter.api.Assertions.assertNotEquals;
22 import static org.junit.jupiter.api.Assertions.assertNotNull;
23 import static org.junit.jupiter.api.Assertions.assertNull;
24 import static org.junit.jupiter.api.Assertions.assertSame;
25
26 import java.util.ArrayList;
27 import java.util.HashMap;
28 import java.util.Iterator;
29 import java.util.Map.Entry;
30 import java.util.TreeMap;
31
32 import org.apache.commons.lang3.AbstractLangTest;
33 import org.apache.commons.lang3.SerializationUtils;
34 import org.junit.jupiter.api.Test;
35
36
37
38
39 class ImmutableTripleTest extends AbstractLangTest {
40
41 @Test
42 void testBasic() {
43 final ImmutableTriple<Integer, String, Boolean> triple = new ImmutableTriple<>(0, "foo", Boolean.TRUE);
44 assertEquals(0, triple.left.intValue());
45 assertEquals(0, triple.getLeft().intValue());
46 assertEquals("foo", triple.middle);
47 assertEquals("foo", triple.getMiddle());
48 assertEquals(Boolean.TRUE, triple.right);
49 assertEquals(Boolean.TRUE, triple.getRight());
50 final ImmutableTriple<Object, String, Integer> triple2 = new ImmutableTriple<>(null, "bar", 42);
51 assertNull(triple2.left);
52 assertNull(triple2.getLeft());
53 assertEquals("bar", triple2.middle);
54 assertEquals("bar", triple2.getMiddle());
55 assertEquals(Integer.valueOf(42), triple2.right);
56 assertEquals(Integer.valueOf(42), triple2.getRight());
57 }
58
59 @Test
60 void testEmptyArrayGenerics() {
61 final ImmutableTriple<Integer, String, Boolean>[] empty = ImmutableTriple.emptyArray();
62 assertEquals(0, empty.length);
63 }
64
65 @Test
66 void testEmptyArrayLength() {
67 @SuppressWarnings("unchecked")
68 final ImmutableTriple<Integer, String, Boolean>[] empty = (ImmutableTriple<Integer, String, Boolean>[]) ImmutableTriple.EMPTY_ARRAY;
69 assertEquals(0, empty.length);
70 }
71
72 @Test
73 void testEquals() {
74 assertEquals(ImmutableTriple.of(null, "foo", 42), ImmutableTriple.of(null, "foo", 42));
75 assertNotEquals(ImmutableTriple.of("foo", 0, Boolean.TRUE), ImmutableTriple.of("foo", null, null));
76 assertNotEquals(ImmutableTriple.of("foo", "bar", "baz"), ImmutableTriple.of("xyz", "bar", "blo"));
77
78 final ImmutableTriple<String, String, String> p = ImmutableTriple.of("foo", "bar", "baz");
79 assertEquals(p, p);
80 assertNotEquals(p, new Object());
81 }
82
83 @Test
84 void testHashCode() {
85 assertEquals(ImmutableTriple.of(null, "foo", Boolean.TRUE).hashCode(), ImmutableTriple.of(null, "foo", Boolean.TRUE).hashCode());
86 }
87
88 @Test
89 void testNullTripleEquals() {
90 assertEquals(ImmutableTriple.nullTriple(), ImmutableTriple.nullTriple());
91 }
92
93 @Test
94 void testNullTripleLeft() {
95 assertNull(ImmutableTriple.nullTriple().getLeft());
96 }
97
98 @Test
99 void testNullTripleMiddle() {
100 assertNull(ImmutableTriple.nullTriple().getMiddle());
101 }
102
103 @Test
104 void testNullTripleRight() {
105 assertNull(ImmutableTriple.nullTriple().getRight());
106 }
107
108 @Test
109 void testNullTripleSame() {
110 assertSame(ImmutableTriple.nullTriple(), ImmutableTriple.nullTriple());
111 }
112
113 @Test
114 void testNullTripleTyped() {
115
116
117 final ImmutableTriple<String, String, String> triple = ImmutableTriple.nullTriple();
118 assertNotNull(triple);
119 }
120
121 @Test
122 void testOf() {
123 assertSame(ImmutableTriple.nullTriple(), ImmutableTriple.of(null, null, null));
124 assertEquals(0, ImmutableTriple.of(0, null, null).getLeft());
125 assertEquals(0, ImmutableTriple.of(null, 0, null).getMiddle());
126 assertEquals(0, ImmutableTriple.of(null, null, 0).getRight());
127 final ImmutableTriple<Integer, String, Boolean> triple = ImmutableTriple.of(0, "foo", Boolean.FALSE);
128 assertEquals(0, triple.left.intValue());
129 assertEquals(0, triple.getLeft().intValue());
130 assertEquals("foo", triple.middle);
131 assertEquals("foo", triple.getMiddle());
132 assertEquals(Boolean.FALSE, triple.right);
133 assertEquals(Boolean.FALSE, triple.getRight());
134 final ImmutableTriple<Object, String, Boolean> triple2 = ImmutableTriple.of(null, "bar", Boolean.TRUE);
135 assertNull(triple2.left);
136 assertNull(triple2.getLeft());
137 assertEquals("bar", triple2.middle);
138 assertEquals("bar", triple2.getMiddle());
139 assertEquals(Boolean.TRUE, triple2.right);
140 assertEquals(Boolean.TRUE, triple2.getRight());
141 }
142
143 @Test
144 void testOfNonNull() {
145 assertNullPointerException(() -> ImmutableTriple.ofNonNull(null, null, null));
146 assertNullPointerException(() -> ImmutableTriple.ofNonNull(null, null, "z"));
147 assertNullPointerException(() -> ImmutableTriple.ofNonNull(null, "y", "z"));
148 assertNullPointerException(() -> ImmutableTriple.ofNonNull("x", null, null));
149 assertNullPointerException(() -> ImmutableTriple.ofNonNull("x", "y", null));
150 final ImmutableTriple<String, String, String> pair = ImmutableTriple.ofNonNull("x", "y", "z");
151 assertEquals("x", pair.left);
152 assertEquals("y", pair.middle);
153 assertEquals("z", pair.right);
154 }
155
156 @Test
157 void testSerialization() throws Exception {
158 final ImmutableTriple<Integer, String, Boolean> origTriple = ImmutableTriple.of(0, "foo", Boolean.TRUE);
159 final ImmutableTriple<Integer, String, Boolean> deserializedTriple = SerializationUtils.roundtrip(origTriple);
160 assertEquals(origTriple, deserializedTriple);
161 assertEquals(origTriple.hashCode(), deserializedTriple.hashCode());
162 }
163
164 @Test
165 void testToString() {
166 assertEquals("(null,null,null)", ImmutableTriple.of(null, null, null).toString());
167 assertEquals("(null,two,null)", ImmutableTriple.of(null, "two", null).toString());
168 assertEquals("(one,null,null)", ImmutableTriple.of("one", null, null).toString());
169 assertEquals("(one,two,null)", ImmutableTriple.of("one", "two", null).toString());
170 assertEquals("(null,two,three)", ImmutableTriple.of(null, "two", "three").toString());
171 assertEquals("(one,null,three)", ImmutableTriple.of("one", null, "three").toString());
172 assertEquals("(one,two,three)", MutableTriple.of("one", "two", "three").toString());
173 }
174
175 @Test
176 void testUseAsKeyOfHashMap() {
177 final HashMap<ImmutableTriple<Object, Object, Object>, String> map = new HashMap<>();
178 final Object o1 = new Object();
179 final Object o2 = new Object();
180 final Object o3 = new Object();
181 final ImmutableTriple<Object, Object, Object> key1 = ImmutableTriple.of(o1, o2, o3);
182 final String value1 = "a1";
183 map.put(key1, value1);
184 assertEquals(value1, map.get(key1));
185 assertEquals(value1, map.get(ImmutableTriple.of(o1, o2, o3)));
186 }
187
188 @Test
189 void testUseAsKeyOfTreeMap() {
190 final TreeMap<ImmutableTriple<Integer, Integer, Integer>, String> map = new TreeMap<>();
191 map.put(ImmutableTriple.of(0, 1, 2), "012");
192 map.put(ImmutableTriple.of(0, 1, 1), "011");
193 map.put(ImmutableTriple.of(0, 0, 1), "001");
194 final ArrayList<ImmutableTriple<Integer, Integer, Integer>> expected = new ArrayList<>();
195 expected.add(ImmutableTriple.of(0, 0, 1));
196 expected.add(ImmutableTriple.of(0, 1, 1));
197 expected.add(ImmutableTriple.of(0, 1, 2));
198 final Iterator<Entry<ImmutableTriple<Integer, Integer, Integer>, String>> it = map.entrySet().iterator();
199 for (final ImmutableTriple<Integer, Integer, Integer> item : expected) {
200 final Entry<ImmutableTriple<Integer, Integer, Integer>, String> entry = it.next();
201 assertEquals(item, entry.getKey());
202 assertEquals(item.getLeft() + "" + item.getMiddle() + "" + item.getRight(), entry.getValue());
203 }
204 }
205 }
206