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c#unit-testingconcurrencylockingnunit
Earlz
Earlz

Reputation: 63835

How can I prevent my NUnit tests from running in parallel sometimes

I'm using the NUnit test runner included in Monodevelop. I have 2 tests which must interact with static resources so I need them to run serially rather than parallel. I've tried using something like

static string Locker="foo";
[Test]
public void Test1()
{
  lock(Locker)
  {
    //....
  }
}
[Test]
public void Test2()
{
  lock(Locker)
  {
    //....
  }
}

This doesn't seem to work though. Is there some other way?

Upvotes: 3

Views: 3992

Answers (5)

empty
empty

Reputation: 5434

For running tests serially it's best to use the Order attribute:

static string Locker="foo";
[Test, Order(1)]
public void Test1()
{
  lock(Locker)
  {
    //....
  }
}
[Test, Order(2)]
public void Test2()
{
  lock(Locker)
  {
    //....
  }
}

Upvotes: 1

Giulio Caccin
Giulio Caccin

Reputation: 3052

I'm using this approach when REALLY needed (i think it's a bad idea):

using System.Threading;
private ManualResetEvent FixtureHandle = new ManualResetEvent(true);
[SetUp]
public void SetUp()
{
    FixtureHandle.WaitOne();
}
[TearDown]
public void TearDown()
{
    FixtureHandle.Set();
}
[Test]
public void Test1()
{
  //only test
}
[Test]
public void Test2()
{
  //only test
}

Upvotes: 2

Pablo Romeo
Pablo Romeo

Reputation: 11396

Instead of using the static resource directly, extract that into a dependency, and mock it (using moq or something similar).

That will let you write actual unit tests that isolate the specific piece of code you are trying to test without worrying about external context.

Upvotes: 0

Marjan Nikolovski
Marjan Nikolovski

Reputation: 848

You are missing the point of the Unit Testing. The Unit tests must be independent in every way.

This means that the execution order must not influence the Unit Tests results.

Upvotes: -3

Sanja Melnichuk
Sanja Melnichuk

Reputation: 3505

Dont know about Monodevelop but nunit console has command line argument /nothread

It should be something similar in Monodevelop i think

Upvotes: 1

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