javascript - Cannot get Karma/Jasmine to work with my angular controller -


ok. have spent several hours trying in vain karma work angular controller. whatever do, following error. seems if remove expectget() calls, still error; call $http.flush();

typeerror: cannot set property 'totalbeforediscounts' of undefined

the code controller follows:

var quotepadcontrollers = angular.module('quotepadcontrollers', []);  quotepadcontrollers.controller('quotescontroller', ['$scope', '$http', '$q', function($scope, $http, $q){  var blankaddon;  // setup initial state , default values var ajaxgetaddons = $http.get('/?ajax=dbase&where=aons'),     ajaxgetframes = $http.get('/?ajax=dbase&where=fcats');  $q.all([ajaxgetaddons, ajaxgetframes]).then(function(results){      $scope.addons = results[0].data;     $scope.frames = results[1].data;      $scope.pairs = [         {             "frames" : angular.copy($scope.frames),             "addons" : angular.copy($scope.addons),         }     ]; });  // function 'add pair' button $scope.addpair = function() {      $scope.pairs.push({             "frames" : angular.copy($scope.frames),             "addons" : angular.copy($scope.addons)     }); };  // function 'remove pair' button $scope.removepair = function() {     if ( $scope.pairs.length > 1 )      {         $scope.pairs.pop();     } };   // continually update subtotal , total $scope.$watch('pairs', function(pairs) {     var totalbeforediscounts = 0;      angular.foreach(pairs, function(pair) {         var subtotal = 0;         angular.foreach(pair.addons, function(addon) {             subtotal += addon.added ? addon.price : 0;         });          subtotal += pair.currentframe !== undefined ? pair.currentframe.price : 0;         pair.subtotal = subtotal;         totalbeforediscounts += subtotal;     });     pairs.totalbeforediscounts = totalbeforediscounts; }, true); }]);

and test code:

describe('quotescontroller', function() { beforeeach(module('quotepadapp'));  var ctrl, $scope, $http, framecatshandler, addonshandler, createcontroller;   // setup tests beforeeach(inject(function($controller, $rootscope, $httpbackend, _$q_) {      $scope = $rootscope.$new();     $http = $httpbackend;      framecatsresponse = [{"id":145,"price":25,"brand":"mybrand"},                          {"id":147,"price":45,"brand":"mybrand"},                          {"id":148,"price":69,"brand":"mybrand"}];       addonshandler = [{"id":1,"name":"addon1","price":30,"includein241":0,"description":null},                      {"id":2,"name":"addon2","price":60,"includein241":0,"description":null}];                    framecatshandler = $http.when('get', '/?ajax=dbase&where=fcats').respond(framecatsresponse);     addonshandler = $http.when('get', '/?ajax=dbase&where=aons').respond(addonshandler);      createcontroller = function()     {         return $controller('quotescontroller', {'$scope' : $scope });     }; }));  it('should request frame cats , addons database', function() {     $http.expectget('/?ajax=dbase&where=aons');     $http.expectget('/?ajax=dbase&where=fcats');     createcontroller();     $http.flush(); }); });

this because have following watch statement in controller trying set totalbeforediscounts property on $scope.pairs.

$scope.$watch('pairs', function(pairs) {     // ...     pairs.totalbeforediscounts = totalbeforediscounts; }, true);

in tests, when create controller , call $http.flush(), that's triggering $digest cycle. kicks off watchers.

createcontroller(); $http.flush();

the watch handler above execute , since executes before $scope.pairs has value, pairs argument passed watch handler undefined, resulting in error.

as per documentation:

after watcher registered scope, listener fn called asynchronously (via $evalasync) initialize watcher. in rare cases, undesirable because listener called when result of watchexpression didn't change. detect scenario within listener fn, can compare newval , oldval. if these 2 values identical (===) listener called due initialization. https://docs.angularjs.org/api/ng/type/$rootscope.scope#$watch

also, in rest of code have $scope.pairs array, in watch trying set property totalbeforediscounts on it. doesn't right.


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