1/*
2 * Copyright (C) 2011 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.base;
18
19import com.google.common.annotations.GwtCompatible;
20import com.google.common.annotations.GwtIncompatible;
21import com.google.common.testing.EqualsTester;
22import com.google.common.testing.NullPointerTester;
23import com.google.common.testing.SerializableTester;
24
25import junit.framework.TestCase;
26
27/**
28 * Tests for {@link Enums}.
29 *
30 * @author Steve McKay
31 */
32@GwtCompatible(emulated = true)
33public class EnumsTest extends TestCase {
34
35  private enum TestEnum {
36    CHEETO,
37    HONDA,
38    POODLE,
39  }
40
41  private enum OtherEnum {}
42
43  public void testValueOfFunction() {
44    Function<String, TestEnum> function = Enums.valueOfFunction(TestEnum.class);
45    assertEquals(TestEnum.CHEETO, function.apply("CHEETO"));
46    assertEquals(TestEnum.HONDA, function.apply("HONDA"));
47    assertEquals(TestEnum.POODLE, function.apply("POODLE"));
48  }
49
50  public void testValueOfFunction_caseSensitive() {
51    Function<String, TestEnum> function = Enums.valueOfFunction(TestEnum.class);
52    assertNull(function.apply("cHEETO"));
53    assertNull(function.apply("Honda"));
54    assertNull(function.apply("poodlE"));
55  }
56
57  public void testValueOfFunction_nullWhenNotMatchingConstant() {
58    Function<String, TestEnum> function = Enums.valueOfFunction(TestEnum.class);
59    assertNull(function.apply("WOMBAT"));
60  }
61
62  public void testValueOfFunction_equals() {
63    new EqualsTester()
64        .addEqualityGroup(
65            Enums.valueOfFunction(TestEnum.class), Enums.valueOfFunction(TestEnum.class))
66        .addEqualityGroup(Enums.valueOfFunction(OtherEnum.class))
67        .testEquals();
68  }
69
70  @GwtIncompatible("SerializableTester")
71  public void testValueOfFunction_serialization() {
72    Function<String, TestEnum> function = Enums.valueOfFunction(TestEnum.class);
73    SerializableTester.reserializeAndAssert(function);
74  }
75
76  @GwtIncompatible("NullPointerTester")
77  public void testNullPointerExceptions() throws Exception {
78    NullPointerTester tester = new NullPointerTester();
79    tester.testAllPublicStaticMethods(Enums.class);
80  }
81}
82