Is the params object sorted by $http in AngularJS?

Currently, I am in the process of writing unit tests for my AngularJS application. In order to perform these tests, I am utilizing the $httpBackend to mock the $http request internally.

During the testing phase, I make use of $httpBackend.expectGET to ensure that the behavior of my application's request is exact.

As an example, I have a Params-Object:

parameters = {
        name : 'Monkey',
        crazy : false,
        desc : 'Nobody',
      };

The Http-Get request in my application is:

return $http.get(this.uri + '/' + id, {params : parameters});

Within my unit test, I anticipate the following:

$httpBackend.expectGET(instance.uri + '/' + returnValues.id + '?' + query).respond(200, object);

Here, "query" consists of the elements of the object concatenated with '=' and '&'. Therefore, I expect the URL to be:

 www.example.com/api/v1/object/1?name=Monkey&crazy=false&desc=Nobody

Unfortunately, the actual URL I receive looks like this:

www.example.com/api/v1/object/1?crazy=false&desc=Nobody&name=Monkey

Is it possible that $http is sorting the parameters based on the keys in the object for the "params"?

javascriptangularjsrestunit-testinghttp

Answer №1

Absolutely, the $http function in Angular sorts the parameters prior to sending them to the server, as indicated in the source code

forEachSorted(params, function(value, key) {
    ...
});

Therefore, when conducting tests, it is important to anticipate keys in order, or alternatively, you have the option to create your custom paramSerializer and send it to the $http provider:

paramSerializer - {string|function(Object):string} - A function that is utilized to generate the string representation of request parameters (specified as an object). If specified as a string, it will be interpreted as a function that is registered with the {$injector}.

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