using System;

[TestFixture]

public class BaseTestsClass

{

     public ILogger FakeTheLogger()

     {

         LoggingFacility.Logger = Substitute.For<ILogger>();

         return LoggingFacility.Logger;

     }

     [TearDown]

     public void teardown()

     {

     // need to reset a static resource between tests

     LoggingFacility.Logger = null;

     }

}

[TestFixture]

public class ConfigurationManagerTests:BaseTestsClass

{

     [Test]

     public void Analyze_EmptyFile_ThrowsException()

     {

         FakeTheLogger();

         ConfigurationManager cm = new ConfigurationManager();

         bool configured = cm.IsConfigured("something");

        //rest of test

     }

}

[TestFixture]

public class LogAnalyzerTests : BaseTestsClass

{

     [Test]

     public void Analyze_EmptyFile_ThrowsException()

     {

     FakeTheLogger();

     LogAnalyzer la = new LogAnalyzer();

     la.Analyze("myemptyfile.txt");

     //rest of test

     }

}