Unknown provider: $scopeProvider <- $scope - angularjs

Question

I am trying to make a small test work that validates wether the controller is defined.
The error I am receiving is:
myApp.orders module Order controller should .... FAILED
Error: [$injector:unpr] Unknown provider: $scopeProvider <- $scope <- OrdersCtrl
Reading similar errors it has something to do with the dependencies, but I don't know what's wrong.
Controller:
'use strict';
angular.module('myApp.orders', ['ngRoute'])
.config(['$routeProvider', function($routeProvider) {
$routeProvider.when('/orders', {
templateUrl: 'orders/orders.template.html',
controller: 'OrdersCtrl'
});
}])
.controller('OrdersCtrl', function($scope, $location) {
$scope.changeView = function(view){
$location.path(view); // path not hash
}
});
Test:
'use strict';
describe('myApp.orders module', function() {
beforeEach(module('myApp.orders'));
describe('Order controller', function(){
it('should ....', inject(function($controller) {
//spec body
var OrdersCtrl = $controller('OrdersCtrl');
expect(OrdersCtrl).toBeDefined();
}));
});
});

Answer 1

This is because you are not passing the $scope variabl einside the controller when you are creating it in test. And the controller tries to define $scope.changeView, but it finds $scope as undefined.
You need to pass a $scope variable to the controller in your test.
var $rootScope, $scope, $controller;
beforeEach(function() {
module('myApp.orders');
inject(function (_$rootScope_, _$controller_) {
$rootScope = _$rootScope_;
$scope = _$rootScope_.$new();
$controller = _$controller_;
});
});
and in your test,
var OrdersCtrl = $controller('OrdersCtrl', { $scope: $scope });

Answer 2

Restructure your unit test slightly. We have a pattern where the controller is defined in the beforeEach() so it's ready for the test. You also need to import the controller you're testing:
import ControllerToTest from 'path/to/your/real/controller';
describe('myApp.orders module',() => {
let vm;
beforeEach(() => {
inject(($controller, $rootScope) => {
vm = $controller(ControllerToTest,
{
$scope: $rootScope.$new()
};
});
});
describe('Order Controller', () => {
it('should do something', () => {
expect(vm).toBeDefined();
});
});
});

Answer 3

Chaneg your controller like this
.controller('OrdersCtrl',['$scope', '$location', function($scope, $location) {
$scope.changeView = function(view){
$location.path(view); // path not hash
}
}]);