parallel code unit tests in C# - is there a framework / tools / nunit extension

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I have to test the behavior of components when executing parallel operations. I haven't found a library / toolbox / unit test extension helping me doing this.

I want to produce exact execution sequences in the parallel code fragments, so I could do this with events manually. But this is very time consuming and annoying.

Posted 28-Dec-14 22:45pm

Thomas Maierhofer (Tom)

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2 solutions

Solution 1

Do you try this?
PNUnit[^]

Posted 28-Dec-14 22:55pm

ridoy

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Thomas Maierhofer (Tom) 29-Dec-14 11:04am

PNunit is good for the described Client/Server scenarios, but I want to test one component (e.g. a thread save collection) with multiple threads. It doesn't help much in this case.

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Thomas Maierhofer (Tom) · Accepted Answer · 2014-12-31T05:03:00

As it turned out, that no solution exists which matches my needs, I used the remaining days of the year to write a concurrency test helper. This is from the unit tests and it shows three parallel code blocks that are executed, synchronized and analyzed using the test helper class:

C#

[Test]
public void SetWaitMultipleEventsTest()
{
    CTestHelper.Run(
        c =>
            {
                Thread.Sleep(1000);
                CTestHelper.AddSequenceStep("s1", "Provide1");
                CTestHelper.SetEvent("e1");
            },
        c =>
            {
                Thread.Sleep(1000);
                CTestHelper.AddSequenceStep("s2", "Provide2");
                CTestHelper.SetEvent("e2");
            },
        c =>
            {
                CTestHelper.WaitAllEvents(new[] { "e1", "e2" });
                CTestHelper.AddSequenceStep("s1", "Consume1");
                CTestHelper.AddSequenceStep("s2", "Consume2");
            },
        TimeSpan.FromSeconds(10));

    Expect(CTestHelper.GetSequence("s1"), Is.EquivalentTo(new[] { "Provide1", "Consume1" }));
    Expect(CTestHelper.GetSequence("s2"), Is.EquivalentTo(new[] { "Provide2", "Consume2" }));
}

The CTestHelper.Run() method runs the provided code blocks (Actions) in parallel and waits until they are finished or a timeout has occurred. Synchronization mechanisms,... are provided too. Samples will follow soon.

Resources (so far):
Crawler-Lib Concurrency Testing Helper Home
Crawler-Lib Concurrency Testing Helper NuGet Package