public void DebugOutputViewModel_Append_NullContent_NotAdded()
{
//------------Setup for test--------------------------
var envRepo = GetEnvironmentRepository();
var viewModel = new DebugOutputViewModel(new Mock<IEventPublisher>().Object, envRepo, new Mock<IDebugOutputFilterStrategy>().Object);
//------------Execute Test---------------------------
viewModel.Append(null);
//------------Assert Results-------------------------
Assert.AreEqual(0, viewModel.ContentItemCount);
Assert.AreEqual(0, viewModel.RootItems.Count);
}