AngularJs 测试 Sinon 间谍

Question

我是 Sinon 的新手，所以我想检查是否正在调用特定函数，这就是我得到的：

terminalController.controller('CashAcceptorController', [
    'PaymentService',
    '$rootScope',
    '$scope',
    'PayingInfo',
    '$interval',
    '$location',
    function (PaymentService, $rootScope, $scope, PayingInfo, $interval, $location) {
     PaymentService.start();
....
]);

在测试中，我尝试检查控制器实例化时是否调用了 PaymentService.start()：

describe('CashAcceptorController', function() {

var PaymentService, rootScope, scope, PayingInfo, $interval, $location;
var mySpy  = sinon.spy(PaymentService.start());;
beforeEach(module('eshtaPayTerminalApp.controllers'));

beforeEach(module('eshtaPayTerminalApp.services'));


beforeEach(inject(function($controller, 
        $rootScope, _PaymentService_, _$interval_, _PayingInfo_) {

    $interval = _$interval_;
    scope = $rootScope.$new();
    rootScope = $rootScope.$new();
    PaymentService = _PaymentService_;
    PayingInfo = _PayingInfo_;

    rootScope.serviceNumber = 'm1';
    rootScope.phoneNumber =  '05135309';

    $controller('CashAcceptorController', {
        $rootScope : rootScope,
        $scope : scope,
        $location : $location,
        _PaymentService_ : PaymentService,
        _$interval_:$interval,
        _PayingInfo_:PayingInfo
        });

}));


it('should call start paying', function() {
            expect(mySpy.callCount).to.equal(1);
        });

但是这个断言失败了。我究竟做错了什么？请帮助:)

Answer 1

您的代码存在一些问题

需要先分配 PaymentService 对象，然后才能监视它
要使用 sinon 添加间谍，您需要将方法名称作为字符串传递，例如。 sinon.spy(PaymentService, 'start');

我已经在 http://plnkr.co/edit/AvqS3L?p=preview

上创建了上面的工作 plunk

这是更新后的测试代码：

describe('CashAcceptorController', function() {

  var PaymentService;
  var $controller;

  beforeEach(module('eshtaPayTerminalApp.controllers'));
  beforeEach(module('eshtaPayTerminalApp.services'));

  beforeEach(inject(function(_PaymentService_, _$controller_) {
    PaymentService = _PaymentService_;
    $controller = _$controller_;
  }));

  it('should call start paying', function() {
    var mySpy = sinon.spy(PaymentService, 'start');
    $controller('CashAcceptorController', { PaymentService: PaymentService });
    
    chai.expect(mySpy.callCount).to.equal(1);
    
    // another way of checking that it was called once
    chai.assert(PaymentService.start.calledOnce);
  });
});

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