Mercurial > hg > Members > kono > jpf-core

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

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author Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
date Fri, 23 Jan 2015 10:14:01 -0800
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1 /*
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2 * Copyright (C) 2014, United States Government, as represented by the
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3 * Administrator of the National Aeronautics and Space Administration.
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4 * All rights reserved.
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5 *
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6 * The Java Pathfinder core (jpf-core) platform is licensed under the
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7 * Apache License, Version 2.0 (the "License"); you may not use this file except
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8 * in compliance with the License. You may obtain a copy of the License at
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9 *
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10 * http://www.apache.org/licenses/LICENSE-2.0.
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11 *
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12 * Unless required by applicable law or agreed to in writing, software
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13 * distributed under the License is distributed on an "AS IS" BASIS,
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14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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15 * See the License for the specific language governing permissions and
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16 * limitations under the License.
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17 */
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18
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19 package gov.nasa.jpf.test.mc.basic;
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20
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21 import gov.nasa.jpf.util.test.TestJPF;
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22 import java.util.HashMap;
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23 import org.junit.Test;
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24
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25 /**
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26 * regression test for NullTracker.
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27 *
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28 * Well, not really a regression test since NullTracker only prints out reports, but at least
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29 * we can see if it has errors while running
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30 */
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31 public class NullTrackerTest extends TestJPF {
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32
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33 static class TestObject {
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34 String d;
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35
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36 TestObject(){
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37 // nothing, we forget to init d;
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38 }
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39
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40 TestObject (String d){
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41 this.d = d;
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42 }
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43
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44 int getDLength(){
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45 return d.length();
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46 }
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47
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48 void foo(){
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49 // nothing
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50 }
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51 }
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52
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53 TestObject o;
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54
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55 TestObject getTestObject (){
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56 return null;
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57 }
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58
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59 void accessReturnedObject (){
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60 TestObject o = getTestObject();
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61 System.out.println("now accessing testObject");
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62 String d = o.d; // that will NPE
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63 }
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64
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65 void accessObject (TestObject o){
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66 System.out.println("now accessing testObject");
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67 String d = o.d; // that will NPE
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68 }
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69
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70 void createAndAccessObject(){
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71 TestObject o = getTestObject();
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72 accessObject(o);
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73 }
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74
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75
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76 @Test
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77 public void testGetAfterIntraMethodReturn (){
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78 if (verifyUnhandledException("java.lang.NullPointerException", "+listener=.listener.NullTracker")){
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79 accessReturnedObject();
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80 }
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81 }
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82
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83 @Test
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84 public void testGetAfterInterMethodReturn (){
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85 if (verifyUnhandledException("java.lang.NullPointerException", "+listener=.listener.NullTracker")){
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86 createAndAccessObject();
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87 }
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88 }
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89
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90 @Test
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91 public void testGetAfterIntraPut (){
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92 if (verifyUnhandledException("java.lang.NullPointerException", "+listener=.listener.NullTracker")){
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93 o = null; // the null source
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94
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95 String d = o.d; // causes the NPE
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96 }
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97 }
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98
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99 @Test
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100 public void testCallAfterIntraPut (){
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101 if (verifyUnhandledException("java.lang.NullPointerException", "+listener=.listener.NullTracker")){
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102 o = null; // the null source
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103
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104 o.foo(); // causes the NPE
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105 }
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106 }
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107
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108 @Test
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109 public void testGetAfterASTORE (){
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110 if (verifyUnhandledException("java.lang.NullPointerException", "+listener=.listener.NullTracker")){
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111 TestObject myObj = null; // the null source
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112
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113 myObj.foo(); // causes the NPE
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114 }
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115 }
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116
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117
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118 HashMap<String,TestObject> map = new HashMap<String,TestObject>();
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119
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120 TestObject lookupTestObject (String name){
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121 return map.get(name);
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122 }
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123
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124 @Test
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125 public void testHashMapGet (){
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126 if (verifyUnhandledException("java.lang.NullPointerException", "+listener=.listener.NullTracker")){
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127 TestObject o = lookupTestObject("FooBar");
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128 o.foo();
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129 }
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130 }
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131
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132 //------------------------------------------------------------------
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133
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134 TestObject createTestObject (){
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135 return new TestObject();
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136 }
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137
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138
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139 TestObject createTestObject (String d){
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140 return new TestObject(d);
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141 }
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142
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143 @Test
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144 public void testMissingCtorInit (){
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145 if (verifyUnhandledException("java.lang.NullPointerException", "+listener=.listener.NullTracker")){
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146 TestObject o = createTestObject("blah");
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147 int len = o.getDLength(); // that should be fine
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148
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149 o = createTestObject();
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
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150 len = o.getDLength(); // that should NPE and report the default ctor as culprit
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
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151 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
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152 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
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153 }