ArrayIndexOutOfBoundsException with BitSets

[GoogleCodeExporter]

What steps will reproduce the problem?
1. write a class that references a java.util.BitSet
2. write/generate hashCode equals methods for that class
3. run equalsverifier
4. you get an ArrayIndexOutOfBoundsException:1 at BitSet.java:1024 with a stack 
trace similar to the following:

java.lang.AssertionError: java.lang.ArrayIndexOutOfBoundsException: 1
For more information, go to: http://www.jqno.nl/equalsverifier/errormessages
    at nl.jqno.equalsverifier.EqualsVerifier.handleError(EqualsVerifier.java:347)
    at nl.jqno.equalsverifier.EqualsVerifier.verify(EqualsVerifier.java:333)
    at com.emovimento.stock.commons.bom.recommendations.RecommendationsTest.equalsContract(RecommendationsTest.java:32)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.lang.ArrayIndexOutOfBoundsException: 1
    at java.util.BitSet.hashCode(BitSet.java:1024)
    at com.emovimento.stock.commons.bom.recommendations.Recommendations.hashCode(Recommendations.java:86)
    at nl.jqno.equalsverifier.ExamplesChecker.checkHashCode(ExamplesChecker.java:187)
    at nl.jqno.equalsverifier.ExamplesChecker.checkSingle(ExamplesChecker.java:92)
    at nl.jqno.equalsverifier.ExamplesChecker.check(ExamplesChecker.java:67)
    at nl.jqno.equalsverifier.EqualsVerifier.verifyWithExamples(EqualsVerifier.java:385)
    at nl.jqno.equalsverifier.EqualsVerifier.performVerification(EqualsVerifier.java:356)
    at nl.jqno.equalsverifier.EqualsVerifier.verify(EqualsVerifier.java:327)
    ... 25 more

Original issue reported on code.google.com by [email protected] on 4 Oct 2013 at 10:54

[GoogleCodeExporter]

Nice catch, thanks for reporting this! I will fix this in the next release.

In the mean time, you can use the following workaround:

        BitSet red = BitSet.valueOf(new byte[] {0, 0});
        BitSet black = BitSet.valueOf(new byte[] {1, 1});

        EqualsVerifier.forClass(BitSetContainer.class)
                .withPrefabValues(BitSet.class, red, black)
                .verify();


Regards,
Jan

Original comment by [email protected] on 13 Oct 2013 at 11:11

• Changed state: Accepted
• Added labels: ****
• Removed labels: ****

[GoogleCodeExporter]

I've fixed this issue in version 1.4, which is just released.

Original comment by [email protected] on 27 Dec 2013 at 12:30

• Changed state: Fixed
• Added labels: ****
• Removed labels: ****