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comparison src/tests/gov/nasa/jpf/test/mc/basic/NullTrackerTest.java @ 0:61d41facf527

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initial v8 import (history reset)
author Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
date Fri, 23 Jan 2015 10:14:01 -0800
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1 /*
2 * Copyright (C) 2014, United States Government, as represented by the
3 * Administrator of the National Aeronautics and Space Administration.
4 * All rights reserved.
5 *
6 * The Java Pathfinder core (jpf-core) platform is licensed under the
7 * Apache License, Version 2.0 (the "License"); you may not use this file except
8 * in compliance with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0.
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18
19 package gov.nasa.jpf.test.mc.basic;
20
21 import gov.nasa.jpf.util.test.TestJPF;
22 import java.util.HashMap;
23 import org.junit.Test;
24
25 /**
26 * regression test for NullTracker.
27 *
28 * Well, not really a regression test since NullTracker only prints out reports, but at least
29 * we can see if it has errors while running
30 */
31 public class NullTrackerTest extends TestJPF {
32
33 static class TestObject {
34 String d;
35
36 TestObject(){
37 // nothing, we forget to init d;
38 }
39
40 TestObject (String d){
41 this.d = d;
42 }
43
44 int getDLength(){
45 return d.length();
46 }
47
48 void foo(){
49 // nothing
50 }
51 }
52
53 TestObject o;
54
55 TestObject getTestObject (){
56 return null;
57 }
58
59 void accessReturnedObject (){
60 TestObject o = getTestObject();
61 System.out.println("now accessing testObject");
62 String d = o.d; // that will NPE
63 }
64
65 void accessObject (TestObject o){
66 System.out.println("now accessing testObject");
67 String d = o.d; // that will NPE
68 }
69
70 void createAndAccessObject(){
71 TestObject o = getTestObject();
72 accessObject(o);
73 }
74
75
76 @Test
77 public void testGetAfterIntraMethodReturn (){
78 if (verifyUnhandledException("java.lang.NullPointerException", "+listener=.listener.NullTracker")){
79 accessReturnedObject();
80 }
81 }
82
83 @Test
84 public void testGetAfterInterMethodReturn (){
85 if (verifyUnhandledException("java.lang.NullPointerException", "+listener=.listener.NullTracker")){
86 createAndAccessObject();
87 }
88 }
89
90 @Test
91 public void testGetAfterIntraPut (){
92 if (verifyUnhandledException("java.lang.NullPointerException", "+listener=.listener.NullTracker")){
93 o = null; // the null source
94
95 String d = o.d; // causes the NPE
96 }
97 }
98
99 @Test
100 public void testCallAfterIntraPut (){
101 if (verifyUnhandledException("java.lang.NullPointerException", "+listener=.listener.NullTracker")){
102 o = null; // the null source
103
104 o.foo(); // causes the NPE
105 }
106 }
107
108 @Test
109 public void testGetAfterASTORE (){
110 if (verifyUnhandledException("java.lang.NullPointerException", "+listener=.listener.NullTracker")){
111 TestObject myObj = null; // the null source
112
113 myObj.foo(); // causes the NPE
114 }
115 }
116
117
118 HashMap<String,TestObject> map = new HashMap<String,TestObject>();
119
120 TestObject lookupTestObject (String name){
121 return map.get(name);
122 }
123
124 @Test
125 public void testHashMapGet (){
126 if (verifyUnhandledException("java.lang.NullPointerException", "+listener=.listener.NullTracker")){
127 TestObject o = lookupTestObject("FooBar");
128 o.foo();
129 }
130 }
131
132 //------------------------------------------------------------------
133
134 TestObject createTestObject (){
135 return new TestObject();
136 }
137
138
139 TestObject createTestObject (String d){
140 return new TestObject(d);
141 }
142
143 @Test
144 public void testMissingCtorInit (){
145 if (verifyUnhandledException("java.lang.NullPointerException", "+listener=.listener.NullTracker")){
146 TestObject o = createTestObject("blah");
147 int len = o.getDLength(); // that should be fine
148
149 o = createTestObject();
150 len = o.getDLength(); // that should NPE and report the default ctor as culprit
151 }
152 }
153 }