[RFC]: ftr: add test case for methods of gridsterUtils.service (#185)
[RFC]: ftr: add test case for methods of gridsterUtils.service (#185)

* ftr: add test case for merge and checkTouchEvent method

* ftr: add test cases for checkContentClassForEvent & checkContentClass

tiberiuzuld/angular-gridster2,tiberiuzuld/angular-gridster2,tiberiuzuld/angular-gridster2,tiberiuzuld/angular-gridster2