public void Then_CompositeConfigurationSourceStillListensToSectionChangedOnSubordinateSource() { bool called = false; MainSource.AddSectionChangeHandler(SectionInChildSource1, (sender, args) => called = true); ChildSource1 = (TestConfigurationSource)CompositionHandler["Source1"]; ChildSource1.DoSourceSectionChanged(SectionInChildSource1); Assert.IsTrue(called); }