Add tests for addWmsSource, addWfsSource and addTmsSource (#743)
Add tests for addWmsSource, addWfsSource and addTmsSource (#743)

* Add tests for addWmsSource
* Add test for addWfsSource
* Add test for createTmsSource

jjmulenex/sdk,boundlessgeo/sdk,jjmulenex/sdk,boundlessgeo/sdk,bartvde/sdk,bartvde/sdk