nunit - Ignore Test or TestFixture based on condition

Question

We've got some integration tests in our solution. To run these tests, simulation software must be installed on the developer PC. This software is, however, not installed on every developer PC. If the simulation software is not installed, these tests should be skipped, otherwise ==> NullRefException.

I'm now seeking for a way to do a "conditional ignore" for tests/testfixtures. Something like

if(simulationFilesExist) 
do testfixture
else skip testfixture

NUnit gives some useful things like ignore and explicit but that's not quiet what I need.

Answer 1

Use some code in your test or fixture set up method that detects if the simulation software is installed or not and calls Assert.Ignore() if it isn't.

[SetUp]
public void TestSetUp() 
{
     if (!TestHelper.SimulationFilesExist())
     {
         Assert.Ignore( "Simulation files are not installed.  Omitting." );
     }
}

or

[TestFixtureSetUp]
public void FixtureSetUp()
{
     if (!TestHelper.SimulationFilesExist())
     {
         Assert.Ignore( "Simulation files are not installed.  Omitting fixture." );
     }
}

In NUnit 3.0 and higher you have to use OneTimeSetUp attribute instead of TestFixtureSetUp.