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 17 package com.google.common.reflect; 18 19 import com.google.common.testing.EqualsTester; 20 import com.google.common.testing.NullPointerTester; 21 22 import junit.framework.TestCase; 23 24 import java.lang.reflect.Method; 25 import java.lang.reflect.TypeVariable; 26 27 /** 28 * Unit test for {@link TypeParameter}. 29 * 30 * @author Ben Yu 31 */ 32 public class TypeParameterTest extends TestCase { 33 34 public <T> void testCaptureTypeParameter() throws Exception { 35 TypeVariable<?> variable = new TypeParameter<T>() {}.typeVariable; 36 TypeVariable<?> expected = TypeParameterTest.class 37 .getDeclaredMethod("testCaptureTypeParameter") 38 .getTypeParameters()[0]; 39 assertEquals(expected, variable); 40 } 41 42 public void testConcreteTypeRejected() { 43 try { 44 new TypeParameter<String>() {}; 45 fail(); 46 } catch (IllegalArgumentException expected) {} 47 } 48 49 public <A, B> void testEquals() throws Exception { 50 Method method = TypeParameterTest.class.getDeclaredMethod("testEquals"); 51 new EqualsTester() 52 .addEqualityGroup( 53 new TypeParameter<A>() {}, new TypeParameter<A>() {}) 54 .addEqualityGroup(new TypeParameter<B>() {}) 55 .testEquals(); 56 } 57 58 public void testNullPointers() { 59 new NullPointerTester().testAllPublicStaticMethods(TypeParameter.class); 60 } 61 } 62
