tree.js: add tests for isConnected
tree.js: add tests for isConnected

Netsend/persdb,Netsend/mastersync,Netsend/mastersync,Netsend/mastersync,Netsend/PerspectiveDB,Netsend/persdb,Netsend/PerspectiveDB,Netsend/PerspectiveDB,Netsend/persdb