Add test from calvinmetcalf in #397
Add test from calvinmetcalf in #397

Leaflet/Leaflet.markercluster,frenomus/Leaflet.markercluster,Leaflet/Leaflet.markercluster,ghybs/Leaflet.markercluster,ghybs/Leaflet.markercluster,frenomus/Leaflet.markercluster