Tests for LayerTree.event.layerTreeDidChange.


== Running test suite: LayerTree.layerTreeDidChange
-- Running test case: LayerTree.layerTreeDidChange.WithRequest
Creating layer...
Layer tree changed
Creating layer...
Layer tree changed
PASS: LayerTreeDidChange should fire after layersForNode is called

-- Running test case: LayerTree.layerTreeDidChange.WithoutRequest
Creating layer...
Layer tree changed
Creating layer...
PASS: LayerTreeDidChange should not fire before layersForNode is called