Add One More Check To Test Twenty Threads

This is part of JavaUnitTestChallengeSolved. -- DonWells

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When I saw that the one put and ten take test had failed, I thought that this test should also have failed. I am thinking that perhaps it has to do with the threads dying after 5 inputs or outputs. So I can just go ahead and change the take threads so that they all stay alive during the whole test.

 public class TwentyThreadsTogether extends Test {
    public BoundedBuffer buffer;
    public PutThread putThreads [];
    public TakeThread takeThreads [];

    public void setUp(){
        buffer = new BoundedBuffer();
        putThreads = new PutThread [10];
        takeThreads = new TakeThread [10];
        for (int each = 0; each < 10; each++) {
            putThreads[each] = new PutThread(buffer);
            takeThreads[each] = new TakeThread(buffer, 50);};}

    public void tearDown(){
        TakeThread.dumpOutput();}

    public void runTest (){
        TakeThread.resetOutput();
        for (int each = 0; each < 10; each++) {
            takeThreads[each].start();};
        for (int each = 0; each < 10; each++) {
            putThreads[each].start();};
        waitForPutToFinish();
        sleepHalfSecond();
        should(TakeThread.outputLength() == 50, "output was too short");
        should(TakeThread.doesOuputHaveTenOf("a"), "should get ten a");
        should(TakeThread.doesOuputHaveTenOf("b"), "should get ten b");
        should(TakeThread.doesOuputHaveTenOf("c"), "should get ten c");
        should(TakeThread.doesOuputHaveTenOf("d"), "should get ten d");
        should(TakeThread.doesOuputHaveTenOf("e"), "should get ten e");}

    public void waitForPutToFinish(){
        try {
            for (int each = 0; each < 10; each++) {
                putThreads[each].join(4000);}}
        catch (InterruptedException exception) {};}

  }

This test fails now.

Interesting thing though. Sometimes it fails in a different way. Every so often it completely deadlocks.

And every so often it will in fact pass.

What I can do for this is ExtendTheJavaTestFrameworkForNondeterminism.

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CategoryJava