使用Jasmine / Angular测试异步功能

Question

有以下Angular代码：

  $scope.clickByPoint = function(marker, eventName, point) {
    var geocoder, location;
    $scope.options.info.point = point;
    $scope.options.info.show = true;
    $scope.searched = false;
    $scope.address = "";
    geocoder = new google.maps.Geocoder();
    location = {
      lat: parseFloat(point.latitude),
      lng: parseFloat(point.longitude)
    };
    geocoder.geocode({location: location}, function(results, status) {
      $scope.searched = true;
      if (status === google.maps.GeocoderStatus.OK) {
        $scope.address = results[0].formatted_address;
      }
      $scope.$digest();
    });
  };

和我的茉莉花测试：

  describe('$scope.clickByPoint', function() {
    var point;

    beforeEach(inject(function(_Point_) {
      point = _Point_.build('PointName', { latitude: 0, longitude: 0 });
    }));

    describe('try to find the address', function() {
      it('initialize google maps info window', function() {
        $scope.clickByPoint(null, null, point)
        expect($scope.searched).toEqual(true);
      });  
    })
  });

如您所见，我正在尝试测试'scope.searched'变量是否已更改，但始终为'false'，因为函数是异步的。 如何正确测试此代码？ 提前致谢。

Answer 1

• 在这种情况下，请在测试中使用茉莉花模拟google.maps.Geocoder（），因为您正在测试clickByPoint（）逻辑而不是Google Maps api。

    var geocoder = new google.maps.Geocoder(); jasmine.createSpy("geocode() geocoder").andCallFake(function(location, callback) { // no wait time ... var results = {fake:'', data:''}; var status = google.maps.GeocoderStatus.OK; // get OK value and set it OR redefine it with a Spy. callback(result, status); }); 

• 现在您可以使用测试了：

    describe('try to find the address', function() { it('initialize google maps info window', function() { $scope.clickByPoint(null, null, point); expect($scope.searched).toEqual(true); }); })