Exploring the testing capabilities of Angular JS in conjunction with third-party libraries such as

Question

Exploring the testing capabilities of Angular JS in conjunction with third-party libraries such as

When testing an angular controller that utilizes an external library like Google Analytics event tracking, how can you approach it? For instance:

$scope.showVolumn  = function() {
  ga('send', {
    'hitType': 'event',          
    'eventCategory': 'Volume',   
    'eventAction': 'click',      
    'eventLabel': 'Interaction'
  });

  if($scope.native !== 'true')
    vm.showVolumnCtl = !vm.showVolumnCtl;
};

While running my test code, I encountered this error:

ReferenceError: Can't find variable: ga

Is it possible to inject 'ga' in the beforeEach method for testing purposes?

javascript angularjs unit-testing

Answer 1

Answer №1

Since ga is a global variable, it is linked to the window object. This means you can access it using $window in both your application and tests.

All you need to do is inject $window and then use it as shown below:

  $window.ga('send', {
    'hitType': 'event',          
    'eventCategory': 'Volume',   
    'eventAction': 'click',      
    'eventLabel': 'Interaction'
  });

This will function exactly the same as before. In your testing environment, simply inject $window again and create any necessary mocks.

Here's a simple example:

beforeEach(inject(function (_$window_) {
    $window = _$window_;
    $window.ga = function(){}; //mock as needed
}));

Answer 2

Since ga is a global variable, it is linked to the window object. This means you can access it using $window in both your application and tests.

All you need to do is inject $window and then use it as shown below:

  $window.ga('send', {
    'hitType': 'event',          
    'eventCategory': 'Volume',   
    'eventAction': 'click',      
    'eventLabel': 'Interaction'
  });

This will function exactly the same as before. In your testing environment, simply inject $window again and create any necessary mocks.

Here's a simple example:

beforeEach(inject(function (_$window_) {
    $window = _$window_;
    $window.ga = function(){}; //mock as needed
}));

Exploring the testing capabilities of Angular JS in conjunction with third-party libraries such as

Answer №1

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