| /* |
| * Copyright (C) 2011 The Guava Authors |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.google.common.base; |
| |
| import com.google.common.annotations.GwtCompatible; |
| import com.google.common.testing.SerializableTester; |
| |
| import junit.framework.TestCase; |
| |
| import java.lang.annotation.Retention; |
| import java.lang.annotation.RetentionPolicy; |
| |
| /** |
| * Tests for {@link Enums}. |
| * |
| * @author Steve McKay |
| */ |
| @GwtCompatible(emulated = true) |
| public class EnumsTest extends TestCase { |
| |
| private enum TestEnum { |
| CHEETO, |
| HONDA, |
| POODLE, |
| } |
| |
| private enum OtherEnum {} |
| |
| public void testGetIfPresent() { |
| assertEquals(Optional.of(TestEnum.CHEETO), Enums.getIfPresent(TestEnum.class, "CHEETO")); |
| assertEquals(Optional.of(TestEnum.HONDA), Enums.getIfPresent(TestEnum.class, "HONDA")); |
| assertEquals(Optional.of(TestEnum.POODLE), Enums.getIfPresent(TestEnum.class, "POODLE")); |
| |
| assertTrue(Enums.getIfPresent(TestEnum.class, "CHEETO").isPresent()); |
| assertTrue(Enums.getIfPresent(TestEnum.class, "HONDA").isPresent()); |
| assertTrue(Enums.getIfPresent(TestEnum.class, "POODLE").isPresent()); |
| |
| assertEquals(TestEnum.CHEETO, Enums.getIfPresent(TestEnum.class, "CHEETO").get()); |
| assertEquals(TestEnum.HONDA, Enums.getIfPresent(TestEnum.class, "HONDA").get()); |
| assertEquals(TestEnum.POODLE, Enums.getIfPresent(TestEnum.class, "POODLE").get()); |
| } |
| |
| public void testGetIfPresent_caseSensitive() { |
| assertFalse(Enums.getIfPresent(TestEnum.class, "cHEETO").isPresent()); |
| assertFalse(Enums.getIfPresent(TestEnum.class, "Honda").isPresent()); |
| assertFalse(Enums.getIfPresent(TestEnum.class, "poodlE").isPresent()); |
| } |
| |
| public void testGetIfPresent_whenNoMatchingConstant() { |
| assertEquals(Optional.absent(), Enums.getIfPresent(TestEnum.class, "WOMBAT")); |
| } |
| |
| // Create a second ClassLoader and use it to get a second version of the TestEnum class. |
| // Run Enums.getIfPresent on that other TestEnum and then return a WeakReference containing the |
| // new ClassLoader. If Enums.getIfPresent does caching that prevents the shadow TestEnum |
| // (and therefore its ClassLoader) from being unloaded, then this WeakReference will never be |
| // cleared. |
| |
| public void testStringConverter_convert() { |
| Converter<String, TestEnum> converter = Enums.stringConverter(TestEnum.class); |
| assertEquals(TestEnum.CHEETO, converter.convert("CHEETO")); |
| assertEquals(TestEnum.HONDA, converter.convert("HONDA")); |
| assertEquals(TestEnum.POODLE, converter.convert("POODLE")); |
| assertNull(converter.convert(null)); |
| assertNull(converter.reverse().convert(null)); |
| } |
| |
| public void testStringConverter_convertError() { |
| Converter<String, TestEnum> converter = Enums.stringConverter(TestEnum.class); |
| try { |
| converter.convert("xxx"); |
| fail(); |
| } catch (IllegalArgumentException expected) { |
| } |
| } |
| |
| public void testStringConverter_reverse() { |
| Converter<String, TestEnum> converter = Enums.stringConverter(TestEnum.class); |
| assertEquals("CHEETO", converter.reverse().convert(TestEnum.CHEETO)); |
| assertEquals("HONDA", converter.reverse().convert(TestEnum.HONDA)); |
| assertEquals("POODLE", converter.reverse().convert(TestEnum.POODLE)); |
| } |
| |
| public void testStringConverter_nullConversions() { |
| Converter<String, TestEnum> converter = Enums.stringConverter(TestEnum.class); |
| assertNull(converter.convert(null)); |
| assertNull(converter.reverse().convert(null)); |
| } |
| |
| public void testStringConverter_serialization() { |
| SerializableTester.reserializeAndAssert(Enums.stringConverter(TestEnum.class)); |
| } |
| |
| @Retention(RetentionPolicy.RUNTIME) |
| private @interface ExampleAnnotation {} |
| |
| private enum AnEnum { |
| @ExampleAnnotation FOO, |
| BAR |
| } |
| } |
| |