ConcurrentModificationExceptionTest.java revision cc05ad238516f1303687aba4a978e24e57c0c07a 
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.util;
19
20import dalvik.annotation.TestTargetNew;
21import dalvik.annotation.TestTargets;
22import dalvik.annotation.TestLevel;
23import dalvik.annotation.TestTargetClass;
24
25import java.util.Collection;
26import java.util.ConcurrentModificationException;
27import java.util.Iterator;
28import java.util.LinkedList;
29
30@TestTargetClass(ConcurrentModificationException.class)
31public class ConcurrentModificationExceptionTest extends
32        junit.framework.TestCase {
33
34    static public class CollectionModifier implements Runnable {
35        Collection col;
36
37        boolean keepGoing = true;
38
39        public CollectionModifier(Collection c) {
40            col = c;
41        }
42
43        public void stopNow() {
44            keepGoing = false;
45        }
46
47        public void run() {
48            Object someItem = new Integer(-1);
49            while (keepGoing) {
50                col.add(someItem);
51                col.remove(someItem);
52            }
53        }
54    }
55
56    /**
57     * @tests java.util.ConcurrentModificationException#ConcurrentModificationException()
58     */
59    @TestTargetNew(
60        level = TestLevel.COMPLETE,
61        notes = "",
62        method = "ConcurrentModificationException",
63        args = {}
64    )
65    public void test_Constructor() {
66        // Test for method java.util.ConcurrentModificationException()
67        Collection myCollection = new LinkedList();
68        Iterator myIterator = myCollection.iterator();
69        for (int counter = 0; counter < 50; counter++)
70            myCollection.add(new Integer(counter));
71        CollectionModifier cm = new CollectionModifier(myCollection);
72        Thread collectionSlapper = new Thread(cm);
73        try {
74            collectionSlapper.start();
75            while (myIterator.hasNext())
76                myIterator.next();
77        } catch (ConcurrentModificationException e) {
78            cm.stopNow();
79            return;
80        }
81        cm.stopNow();
82        // The exception should have been thrown--if the code flow makes it here
83        // the test has failed
84        fail("Failed to throw expected ConcurrentModificationException");
85    }
86
87    /**
88     * @tests java.util.ConcurrentModificationException#ConcurrentModificationException(java.lang.String)
89     */
90    @TestTargetNew(
91        level = TestLevel.COMPLETE,
92        notes = "",
93        method = "ConcurrentModificationException",
94        args = {java.lang.String.class}
95    )
96    public void test_ConstructorLjava_lang_String() {
97        // Test for method
98        // java.util.ConcurrentModificationException(java.lang.String)
99        String errorMessage = "This is an error message";
100        try {
101            // This is here to stop "unreachable code" unresolved problem
102            if (true)
103                throw new ConcurrentModificationException(errorMessage);
104        } catch (ConcurrentModificationException e) {
105            assertTrue("Exception thrown without error message", e.getMessage()
106                    .equals(errorMessage));
107            return;
108        }
109        fail("Failed to throw expected ConcurrentModificationException");
110    }
111
112    /**
113     * Sets up the fixture, for example, open a network connection. This method
114     * is called before a test is executed.
115     */
116    protected void setUp() {
117    }
118
119    /**
120     * Tears down the fixture, for example, close a network connection. This
121     * method is called after a test is executed.
122     */
123    protected void tearDown() {
124    }
125}
126