Angular - service example

gistfile1.js

describe('service-example', function() {

  angular.service('notify', function(win) {
      var msgs = [];
      return function(msg) {
        msgs.push(msg);
        if (msgs.length == 3) {
          win.alert(msgs.join("\n"));
          msgs = [];
        }
      };
    });
    
  var mock, notify;
    
  beforeEach(function() {
    mock = {alert: createSpy()};
    notify = angular.service('notify')(mock);
  });
  
  it('should not alert first two notifications', function() {
    notify('one');
    notify('two');
    expect(mock.alert).not.toHaveBeenCalled();
  });
  
  it('should alert all after third notification', function() {
    notify('one');
    notify('two');
    notify('three');
    expect(mock.alert).toHaveBeenCalledWith("one\ntwo\nthree");
  });
  
  it('should clear messages after alert', function() {
    notify('one');
    notify('two');
    notify('third');
    notify('more');
    notify('two');
    notify('third');
    expect(mock.alert.callCount).toEqual(2);
    expect(mock.alert.mostRecentCall.args).toEqual(["more\ntwo\nthird"]);
  });
});