public void Pop()
{
var bottle = new AssemblyPackageInfo(Assembly.GetExecutingAssembly());
var graph = new ConfigGraph();
graph.Push(bottle);
var extension = new FakeRegistryExtension();
graph.Push(extension);
graph.Pop();
graph.CurrentProvenance.ShouldHaveTheSameElementsAs(new BottleProvenance(bottle));
graph.Pop();
graph.CurrentProvenance.Any().ShouldBeFalse();
}
