how to write test case for functions like shown below in jasmine

function assignDatesToArbitrationCase(caseID, dateType,dt){ var urlAssignDate = ConfigService.getBaseURL() + '/legalcase/legalcasedatetype' var assignDateStr = ' ' + ' ' + ' ' + '' + dateFormatForServer(dt) + '' + ' '; return $http({ url: urlAssignDate, method: 'POST', data: assignDateStr }).then(function (results) { var jsonObject = x2js.xml_str2json(results.data); return jsonObject; }) }