public void DeleteFilter_Test()
{
var testProject = new TestProject();
projectTreeModel.TestProject = testProject;
var progressMonitor = MockProgressMonitor.Instance;
Assert.Count(0, projectController.TestFilters.Value);
FilterInfo filterInfo = new FilterInfo("filterName", new NoneFilter <ITestDescriptor>().ToFilterExpr());
projectController.TestFilters.Value.Add(filterInfo);
Assert.Count(1, projectController.TestFilters.Value);
projectController.DeleteFilter(progressMonitor, filterInfo);
Assert.Count(0, projectController.TestFilters.Value);
}