WeakReferenceTest.java revision 89c1feb0a69a7707b271086e749975b3f7acacf7 
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 */
17
18package tests.api.java.lang.ref;
19
20import dalvik.annotation.TestInfo;
21import dalvik.annotation.TestLevel;
22import dalvik.annotation.TestTarget;
23import dalvik.annotation.TestTargetClass;
24
25import java.lang.ref.ReferenceQueue;
26import java.lang.ref.WeakReference;
27
28@TestTargetClass(WeakReference.class)
29public class WeakReferenceTest extends junit.framework.TestCase {
30    static Boolean bool;
31
32    protected void doneSuite() {
33        bool = null;
34    }
35
36    /**
37     * @tests java.lang.ref.WeakReference#WeakReference(java.lang.Object,
38     *        java.lang.ref.ReferenceQueue)
39     */
40    @TestInfo(
41      level = TestLevel.COMPLETE,
42      purpose = "",
43      targets = {
44        @TestTarget(
45          methodName = "WeakReference",
46          methodArgs = {Object.class, java.lang.ref.ReferenceQueue.class}
47        )
48    })
49    public void test_ConstructorLjava_lang_ObjectLjava_lang_ref_ReferenceQueue() {
50        ReferenceQueue rq = new ReferenceQueue();
51        bool = new Boolean(true);
52        try {
53            // Allow the finalizer to run to potentially enqueue
54            WeakReference wr = new WeakReference(bool, rq);
55            assertTrue("Initialization failed.", ((Boolean) wr.get())
56                    .booleanValue());
57        } catch (Exception e) {
58            fail("Exception during test : " + e.getMessage());
59        }
60        // need a reference to bool so the jit does not optimize it away
61        assertTrue("should always pass", bool.booleanValue());
62
63        boolean exception = false;
64        try {
65            new WeakReference(bool, null);
66        } catch (NullPointerException e) {
67            exception = true;
68        }
69        assertTrue("Should not throw NullPointerException", !exception);
70    }
71
72    /**
73     * @tests java.lang.ref.WeakReference#WeakReference(java.lang.Object)
74     */
75    @TestInfo(
76      level = TestLevel.COMPLETE,
77      purpose = "",
78      targets = {
79        @TestTarget(
80          methodName = "WeakReference",
81          methodArgs = {Object.class}
82        )
83    })
84    public void test_ConstructorLjava_lang_Object() {
85        bool = new Boolean(true);
86        try {
87            WeakReference wr = new WeakReference(bool);
88            // Allow the finalizer to run to potentially enqueue
89            Thread.sleep(1000);
90            assertTrue("Initialization failed.", ((Boolean) wr.get())
91                    .booleanValue());
92        } catch (Exception e) {
93            fail("Exception during test : " + e.getMessage());
94        }
95        // need a reference to bool so the jit does not optimize it away
96        assertTrue("should always pass", bool.booleanValue());
97    }
98
99    protected void setUp() {
100    }
101
102    protected void tearDown() {
103    }
104}
105