1/* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17package tests.api.java.lang.ref; 18 19import dalvik.annotation.SideEffect; 20 21import java.lang.ref.Reference; 22import java.lang.ref.ReferenceQueue; 23import java.lang.ref.SoftReference; 24import java.util.Vector; 25import libcore.java.lang.ref.FinalizationTester; 26 27public class SoftReferenceTest extends junit.framework.TestCase { 28 static Boolean bool; 29 SoftReference r; 30 31 protected void doneSuite() { 32 bool = null; 33 } 34 35 /** 36 * java.lang.ref.SoftReference#SoftReference(java.lang.Object, 37 * java.lang.ref.ReferenceQueue) 38 */ 39 public void test_ConstructorLjava_lang_ObjectLjava_lang_ref_ReferenceQueue() { 40 ReferenceQueue rq = new ReferenceQueue(); 41 bool = new Boolean(true); 42 try { 43 SoftReference sr = new SoftReference(bool, rq); 44 assertTrue("Initialization failed.", ((Boolean) sr.get()) 45 .booleanValue()); 46 } catch (Exception e) { 47 fail("Exception during test : " + e.getMessage()); 48 } 49 50 boolean exception = false; 51 try { 52 new SoftReference(bool, null); 53 } catch (NullPointerException e) { 54 exception = true; 55 } 56 assertTrue("Should not throw NullPointerException", !exception); 57 } 58 59 /** 60 * java.lang.ref.SoftReference#SoftReference(java.lang.Object) 61 */ 62 public void test_ConstructorLjava_lang_Object() { 63 bool = new Boolean(true); 64 try { 65 SoftReference sr = new SoftReference(bool); 66 assertTrue("Initialization failed.", ((Boolean) sr.get()) 67 .booleanValue()); 68 } catch (Exception e) { 69 fail("Exception during test : " + e.getMessage()); 70 } 71 } 72 73 /** 74 * java.lang.ref.SoftReference#get() 75 */ 76 public void test_get() { 77 bool = new Boolean(false); 78 SoftReference sr = new SoftReference(bool); 79 assertTrue("Same object not returned.", bool == sr.get()); 80 } 81 82 @SideEffect("Causes OutOfMemoryError to test finalization") 83 public void test_get_SoftReference() { 84 85 class TestObject { 86 public boolean finalized; 87 public TestObject() { 88 finalized = false; 89 } 90 91 protected void finalize() { 92 finalized = true; 93 } 94 } 95 96 final ReferenceQueue rq = new ReferenceQueue(); 97 98 class TestThread extends Thread { 99 public void run() { 100 Object testObj = new TestObject(); 101 r = new SoftReference(testObj, rq); 102 } 103 } 104 Reference ref; 105 try { 106 TestThread t = new TestThread(); 107 t.start(); 108 t.join(); 109 Vector<StringBuffer> v = new Vector<StringBuffer>(); 110 try { 111 while(true) { 112 v.add(new StringBuffer(10000)); 113 } 114 } catch(OutOfMemoryError ofme) { 115 v = null; 116 } 117 } catch (InterruptedException e) { 118 fail("InterruptedException : " + e.getMessage()); 119 } 120 121 assertNull("get() should return null " + 122 "if OutOfMemoryError is thrown.", r.get()); 123 124 try { 125 TestThread t = new TestThread(); 126 t.start(); 127 t.join(); 128 FinalizationTester.induceFinalization(); 129 ref = rq.poll(); 130 assertNotNull("Object not garbage collected.", ref); 131 assertNull("Object is not null.", ref.get()); 132 assertNotNull("Object could not be reclaimed.", r.get()); 133 } catch (Exception e) { 134 fail("Exception : " + e.getMessage()); 135 } 136 } 137 138 protected void setUp() { 139 } 140 141 protected void tearDown() { 142 } 143} 144