1/* Licensed to the Apache Software Foundation (ASF) under one or more
2 * contributor license agreements.  See the NOTICE file distributed with
3 * this work for additional information regarding copyright ownership.
4 * The ASF licenses this file to You under the Apache License, Version 2.0
5 * (the "License"); you may not use this file except in compliance with
6 * the License.  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 org.apache.harmony.tests.java.lang;
18
19import java.util.HashMap;
20
21import junit.framework.TestCase;
22
23import org.apache.harmony.testframework.serialization.SerializationTest;
24
25import tests.util.SerializationTester;
26
27public class EnumTest extends TestCase {
28
29    enum Sample {
30        LARRY, MOE, CURLY
31    }
32
33    Sample larry = Sample.LARRY;
34
35    Sample moe = Sample.MOE;
36
37    enum Empty {
38    }
39
40    enum Bogus {
41        UNUSED
42    }
43
44    enum Color {
45        Red, Green, Blue {};
46    }
47
48    enum MockCloneEnum {
49        ONE;
50
51        public void callClone() throws CloneNotSupportedException {
52            super.clone();
53        }
54    }
55
56    /**
57     * java.lang.Enum#compareTo(java.lang.Enum)
58     */
59    public void test_compareToLjava_lang_Enum() {
60        assertTrue(0 < Sample.MOE.compareTo(Sample.LARRY));
61        assertEquals(0, Sample.MOE.compareTo(Sample.MOE));
62        assertTrue(0 > Sample.MOE.compareTo(Sample.CURLY));
63        try {
64            Sample.MOE.compareTo((Sample) null);
65            fail("Should throw NullPointerException");
66        } catch (NullPointerException e) {
67            // Expected
68        }
69    }
70
71    /**
72     * java.lang.Enum#equals(Object)
73     */
74    public void test_equalsLjava_lang_Object() {
75        assertFalse(moe.equals("bob"));
76        assertTrue(moe.equals(Sample.MOE));
77        assertFalse(Sample.LARRY.equals(Sample.CURLY));
78        assertTrue(Sample.LARRY.equals(larry));
79        assertFalse(Sample.CURLY.equals(null));
80    }
81
82    /**
83     * java.lang.Enum#getDeclaringClass()
84     */
85    public void test_getDeclaringClass() {
86        assertEquals(Sample.class, moe.getDeclaringClass());
87    }
88
89    /**
90     * java.lang.Enum#hashCode()
91     */
92    public void test_hashCode() {
93        assertEquals(moe.hashCode(), moe.hashCode());
94    }
95
96    /**
97     * java.lang.Enum#name()
98     */
99    public void test_name() {
100        assertEquals("MOE", moe.name());
101    }
102
103    /**
104     * java.lang.Enum#ordinal()
105     */
106    public void test_ordinal() {
107        assertEquals(0, larry.ordinal());
108        assertEquals(1, moe.ordinal());
109        assertEquals(2, Sample.CURLY.ordinal());
110    }
111
112    /**
113     * java.lang.Enum#toString()
114     */
115    public void test_toString() {
116        assertTrue(moe.toString().equals("MOE"));
117    }
118
119    /**
120     * java.lang.Enum#valueOf(Class, String)
121     */
122    public void test_valueOfLjava_lang_String() {
123        assertSame(Sample.CURLY, Sample.valueOf("CURLY"));
124        assertSame(Sample.LARRY, Sample.valueOf("LARRY"));
125        assertSame(moe, Sample.valueOf("MOE"));
126        try {
127            Sample.valueOf("non-existant");
128            fail("Expected an exception");
129        } catch (IllegalArgumentException e) {
130            // Expected
131        }
132        try {
133            Sample.valueOf(null);
134            fail("Should throw NullPointerException");
135        } catch (NullPointerException e) {
136            // May be caused by some compilers' code
137        } catch (IllegalArgumentException e) {
138            // other compilers will throw this
139        }
140
141
142        Sample s = Enum.valueOf(Sample.class, "CURLY");
143        assertSame(s, Sample.CURLY);
144        s = Enum.valueOf(Sample.class, "LARRY");
145        assertSame(larry, s);
146        s = Enum.valueOf(Sample.class, "MOE");
147        assertSame(s, moe);
148        try {
149            Enum.valueOf(Bogus.class, "MOE");
150            fail("Expected IllegalArgumentException");
151        } catch (IllegalArgumentException e) {
152            // Expected
153        }
154        try {
155            Enum.valueOf((Class<Sample>) null, "a string");
156            fail("Expected an exception");
157        } catch (NullPointerException e) {
158            // May be caused by some compilers' code
159        } catch (IllegalArgumentException e) {
160            // other compilers will throw this
161        }
162        try {
163            Enum.valueOf(Sample.class, null);
164            fail("Expected an exception");
165        } catch (NullPointerException e) {
166            // May be caused by some compilers' code
167        } catch (IllegalArgumentException e) {
168            // other compilers will throw this
169        }
170        try {
171            Enum.valueOf((Class<Sample>) null, (String) null);
172            fail("Expected an exception");
173        } catch (NullPointerException e) {
174            // May be caused by some compilers' code
175        } catch (IllegalArgumentException e) {
176            // other compilers will throw this
177        }
178    }
179
180    /**
181     * java.lang.Enum#values
182     */
183    public void test_values() {
184        Sample[] myValues = Sample.values();
185        assertEquals(3, myValues.length);
186
187        assertEquals(Sample.LARRY, myValues[0]);
188        assertEquals(Sample.MOE, myValues[1]);
189        assertEquals(Sample.CURLY, myValues[2]);
190
191        assertEquals(0, Empty.values().length);
192    }
193
194    /**
195     * java.lang.Enum#clone()
196     */
197    public void test_clone() {
198        try {
199            MockCloneEnum.ONE.callClone();
200            fail("Should throw CloneNotSupprotedException");
201        } catch (CloneNotSupportedException e1) {
202            // expected
203        }
204
205    }
206
207    public void test_compatibilitySerialization_inClass_Complex_Harmony() throws Exception {
208        // TODO migrate to the new testing framework
209        assertTrue(SerializationTester.assertCompabilityEquals(new MockEnum2(),
210                "serialization/org/apache/harmony/tests/java/lang/EnumTest.harmony.ser"));
211    }
212
213    /**
214     * serialization/deserialization compatibility.
215     */
216    public void testSerializationSelf() throws Exception {
217
218        // test a map class that has enums.
219        // regression test for Harmony-1163
220        HashMap<Color, Integer> enumColorMap = new HashMap<Color, Integer>();
221        enumColorMap.put(Color.Red, 1);
222        enumColorMap.put(Color.Blue, 3);
223
224        Object[] testCases = { enumColorMap, Sample.CURLY };
225
226        SerializationTest.verifySelf(testCases);
227
228        // test a class that has enums as its fields.
229        MockEnum mock = new MockEnum();
230        MockEnum test = (MockEnum) SerializationTest.copySerializable(mock);
231        assertEquals(mock.i, test.i);
232        assertEquals(mock.str, test.str);
233        assertEquals(mock.samEnum, test.samEnum);
234
235        // test a class that has enums and a string of same name as its fields.
236        MockEnum2 mock2 = new MockEnum2();
237        MockEnum2 test2 = (MockEnum2) SerializationTest.copySerializable(mock2);
238        assertEquals(mock2.i, test2.i);
239        assertEquals(mock2.str, test2.str);
240        assertEquals(mock2.samEnum, test2.samEnum);
241    }
242
243    /**
244     * serialization/deserialization compatibility with RI.
245     */
246    public void testSerializationCompatibility() throws Exception {
247
248        // regression test for Harmony-1163
249        HashMap<Color, Integer> enumColorMap = new HashMap<Color, Integer>();
250        enumColorMap.put(Color.Red, 1);
251        enumColorMap.put(Color.Blue, 3);
252
253        Object[] testCases = { Sample.CURLY, new MockEnum(),
254                // test a class that has enums and a string of same name as its fields.
255                new MockEnum2(),
256                // test a map class that has enums.
257                enumColorMap, };
258
259        SerializationTest.verifyGolden(this, testCases);
260    }
261}
262