Mercurial > hg > Members > kono > jpf-core
view src/tests/gov/nasa/jpf/test/mc/basic/NullTrackerTest.java @ 0:61d41facf527
initial v8 import (history reset)
author | Peter Mehlitz <Peter.C.Mehlitz@nasa.gov> |
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date | Fri, 23 Jan 2015 10:14:01 -0800 |
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/* * Copyright (C) 2014, United States Government, as represented by the * Administrator of the National Aeronautics and Space Administration. * All rights reserved. * * The Java Pathfinder core (jpf-core) platform is licensed under the * Apache License, Version 2.0 (the "License"); you may not use this file except * in compliance with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0. * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package gov.nasa.jpf.test.mc.basic; import gov.nasa.jpf.util.test.TestJPF; import java.util.HashMap; import org.junit.Test; /** * regression test for NullTracker. * * Well, not really a regression test since NullTracker only prints out reports, but at least * we can see if it has errors while running */ public class NullTrackerTest extends TestJPF { static class TestObject { String d; TestObject(){ // nothing, we forget to init d; } TestObject (String d){ this.d = d; } int getDLength(){ return d.length(); } void foo(){ // nothing } } TestObject o; TestObject getTestObject (){ return null; } void accessReturnedObject (){ TestObject o = getTestObject(); System.out.println("now accessing testObject"); String d = o.d; // that will NPE } void accessObject (TestObject o){ System.out.println("now accessing testObject"); String d = o.d; // that will NPE } void createAndAccessObject(){ TestObject o = getTestObject(); accessObject(o); } @Test public void testGetAfterIntraMethodReturn (){ if (verifyUnhandledException("java.lang.NullPointerException", "+listener=.listener.NullTracker")){ accessReturnedObject(); } } @Test public void testGetAfterInterMethodReturn (){ if (verifyUnhandledException("java.lang.NullPointerException", "+listener=.listener.NullTracker")){ createAndAccessObject(); } } @Test public void testGetAfterIntraPut (){ if (verifyUnhandledException("java.lang.NullPointerException", "+listener=.listener.NullTracker")){ o = null; // the null source String d = o.d; // causes the NPE } } @Test public void testCallAfterIntraPut (){ if (verifyUnhandledException("java.lang.NullPointerException", "+listener=.listener.NullTracker")){ o = null; // the null source o.foo(); // causes the NPE } } @Test public void testGetAfterASTORE (){ if (verifyUnhandledException("java.lang.NullPointerException", "+listener=.listener.NullTracker")){ TestObject myObj = null; // the null source myObj.foo(); // causes the NPE } } HashMap<String,TestObject> map = new HashMap<String,TestObject>(); TestObject lookupTestObject (String name){ return map.get(name); } @Test public void testHashMapGet (){ if (verifyUnhandledException("java.lang.NullPointerException", "+listener=.listener.NullTracker")){ TestObject o = lookupTestObject("FooBar"); o.foo(); } } //------------------------------------------------------------------ TestObject createTestObject (){ return new TestObject(); } TestObject createTestObject (String d){ return new TestObject(d); } @Test public void testMissingCtorInit (){ if (verifyUnhandledException("java.lang.NullPointerException", "+listener=.listener.NullTracker")){ TestObject o = createTestObject("blah"); int len = o.getDLength(); // that should be fine o = createTestObject(); len = o.getDLength(); // that should NPE and report the default ctor as culprit } } }