public void overrideTestWithStub()
{
Stub3ExtensionManager stub = new Stub3ExtensionManager();
stub.ShouldBeValid = false;
TestableLogAnalyzer logan = new TestableLogAnalyzer();
logan.Manager=stub;
bool result = logan.IsValidLogFileName("file.ext");
Assert.IsFalse(result,"File name should be too short to be considered valid");
}