1 /* 2 * Copyright (C) 2006 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.NullPointerTester; 20 21 import junit.framework.TestCase; 22 23 import java.lang.reflect.InvocationHandler; 24 import java.lang.reflect.Method; 25 import java.util.Map; 26 27 /** Tests for {@link Reflection} */ 28 public class ReflectionTest extends TestCase { 29 testGetPackageName()30 public void testGetPackageName() throws Exception { 31 assertEquals("java.lang", Reflection.getPackageName(Iterable.class)); 32 assertEquals("java", Reflection.getPackageName("java.MyType")); 33 assertEquals("java.lang", Reflection.getPackageName(Iterable.class.getName())); 34 assertEquals("", Reflection.getPackageName("NoPackage")); 35 assertEquals("java.util", Reflection.getPackageName(Map.Entry.class)); 36 } 37 testNewProxy()38 public void testNewProxy() throws Exception { 39 Runnable runnable = Reflection.newProxy(Runnable.class, X_RETURNER); 40 assertEquals("x", runnable.toString()); 41 } 42 testNewProxyCantWorkOnAClass()43 public void testNewProxyCantWorkOnAClass() throws Exception { 44 try { 45 Reflection.newProxy(Object.class, X_RETURNER); 46 fail(); 47 } catch (IllegalArgumentException expected) { 48 } 49 } 50 51 private static final InvocationHandler X_RETURNER = new InvocationHandler() { 52 @Override 53 public Object invoke(Object proxy, Method method, Object[] args) 54 throws Throwable { 55 return "x"; 56 } 57 }; 58 59 private static int classesInitialized = 0; 60 private static class A { 61 static { 62 ++classesInitialized; 63 } 64 } 65 private static class B { 66 static { 67 ++classesInitialized; 68 } 69 } 70 private static class C { 71 static { 72 ++classesInitialized; 73 } 74 } 75 testInitialize()76 public void testInitialize() { 77 assertEquals("This test can't be included twice in the same suite.", 0, classesInitialized); 78 79 Reflection.initialize(A.class); 80 assertEquals(1, classesInitialized); 81 82 Reflection.initialize( 83 A.class, // Already initialized (above) 84 B.class, 85 C.class); 86 assertEquals(3, classesInitialized); 87 } 88 testNullPointers()89 public void testNullPointers() { 90 new NullPointerTester().testAllPublicStaticMethods(Reflection.class); 91 } 92 } 93