Replicate the functionality of a backend API using AngularJS

Question

Replicate the functionality of a backend API using AngularJS

Currently, I am in the midst of creating a GUI for an application that is still undergoing API development. Although I have a vision of how it will look, it lacks functionality as of now. Hence, I need to replicate its behavior until the API is fully functional.

To achieve this, I am exploring the usage of $httpBackend. My setup involves using Yeoman.

Installation Attempt

My Angular version is v1.2.6.

The documentation presents three methods for installation:

Google CDN at

//ajax.googleapis.com/ajax/libs/angularjs/X.Y.Z/angular-mocke2e.js

Bower via

bower install <a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="25444b425049445708484a464e401740657d0b7c0b7f">[email protected]</a>

code.angularjs.org:

//code.angularjs.org/X.Y.Z/angular-mocke2e.js

Where X.Y.Z represents my specific version number.

Unfortunately, none of these approaches seem to work. Google results in a 404 error and does not allow directory traversal. Bower indicates no available package, with a 404 on code.angularjs.org. Upon further investigation on code.angularjs.org, I discovered that for version 1.2.6, there is a lack of angular-mock availability

However, I did manage to locate a file at

https://code.angularjs.org/1.2.6/angular-mocks.js

, which appears to contain the definition for $httpBackendProvider.

Upon returning to my Yeoman installation, it seems that angular-mocks.js was already installed.

Thus, my first query arises: Is this the appropriate resource to utilize $httpBackend?

Utilization Attempt

Subsequently, I attempted to integrate it into my project:

// Manually running the app to check cookies
app.run(['$cookies', '$location', '$rootScope', '$httpBackend', function($cookies, $location, $rootScope, $httpBackend){

    // Some stuff....

    console.log($httpBackend);

}]);

Regrettably, my app failed to launch, displaying the following error:

Although the app does reveal the contents of $httpBackend, I pondered if relocating it to a different module might be necessary.

Hence, my second question emerges: Is it common for my app to fail loading when incorporating $httpBackend within the app.run() call?

Furthermore, question 3 arises: During testing, should I segregate my $httpBackend functions into a separate module?

Lastly, I contemplate whether this methodology constitutes the most effective approach for API testing.

javascript angularjs

Answer 1

Answer №1

If you want to simulate your services, try using $httpBackend in this manner:
```
$httpBackend.whenGET(/\/api\/foo\/bar/).respond({some:'thing'});
```
The reason your app is not loading could be due to unexpected requests for partials. To prevent this, consider implementing the following:
```
$httpBackend.whenGET(/^views\/.*/).passThrough();
```
It may be beneficial to separate these into distinct modules so they can be excluded before deployment.
Whether this is the optimal solution depends on your specific requirements. One suggestion is to incorporate various build tools (such as Grunt, Express, Protractor, etc.) that come with a local node server for testing purposes. This way, you can utilize real services for testing, as recommended by @Ronald91.

Answer 2

If you want to simulate your services, try using $httpBackend in this manner:
```
$httpBackend.whenGET(/\/api\/foo\/bar/).respond({some:'thing'});
```
The reason your app is not loading could be due to unexpected requests for partials. To prevent this, consider implementing the following:
```
$httpBackend.whenGET(/^views\/.*/).passThrough();
```
It may be beneficial to separate these into distinct modules so they can be excluded before deployment.
Whether this is the optimal solution depends on your specific requirements. One suggestion is to incorporate various build tools (such as Grunt, Express, Protractor, etc.) that come with a local node server for testing purposes. This way, you can utilize real services for testing, as recommended by @Ronald91.

Answer 3

Answer №2

Currently facing a similar challenge with a project I'm involved in. While we haven't used httpbackend for this purpose, we decided to mock out the backend services using MongoDB. In our app.js file, we configured the routing like this:

  app.get( '/ui/orders/:orderId/details', function( req, res ){
        mongoclient.connect( mongoUrl, function(err, db){
            if( err ) throw err;
            var collection = db.collection('order-details');
            console.log( req.query);
            collection.findOne( { orderId : req.params.orderId}, function(err, docs){
                if( err ) throw err;
                console.log( "Docs...");
                console.log( docs );
                db.close();
                res.send( docs );

            } );

        });


    });

To make use of this routing, we implemented the following service call:

ourApp.factory('orderDetails', function($resource, $routeParams) {
    return function(){
        return $resource('/ui/orders/:orderId/:subSystem', {orderId: $routeParams.orderId});
    };
});

Answer 4

Currently facing a similar challenge with a project I'm involved in. While we haven't used httpbackend for this purpose, we decided to mock out the backend services using MongoDB. In our app.js file, we configured the routing like this:

  app.get( '/ui/orders/:orderId/details', function( req, res ){
        mongoclient.connect( mongoUrl, function(err, db){
            if( err ) throw err;
            var collection = db.collection('order-details');
            console.log( req.query);
            collection.findOne( { orderId : req.params.orderId}, function(err, docs){
                if( err ) throw err;
                console.log( "Docs...");
                console.log( docs );
                db.close();
                res.send( docs );

            } );

        });


    });

To make use of this routing, we implemented the following service call:

ourApp.factory('orderDetails', function($resource, $routeParams) {
    return function(){
        return $resource('/ui/orders/:orderId/:subSystem', {orderId: $routeParams.orderId});
    };
});

Answer 5

Answer №3

Here is a solution for the "Attempt To Install" issue.

If you're looking to mock data, angular-mocks.js is the way to go. It contains various modules that are handy for mocking, although you don't need to use all of them.

Specifically, for the scenario you described (which I am also trying to address), follow these steps:

Include the angular-mocks.js file in your project.
Add the following dependency to your main app module in order to mock back-end requests:

var yourApp = angular.module('app', ['ngMockE2E']);

You can utilize the mocks module both in unit tests and during application development.

Answer 6

Here is a solution for the "Attempt To Install" issue.

If you're looking to mock data, angular-mocks.js is the way to go. It contains various modules that are handy for mocking, although you don't need to use all of them.

Specifically, for the scenario you described (which I am also trying to address), follow these steps:

Include the angular-mocks.js file in your project.
Add the following dependency to your main app module in order to mock back-end requests:

var yourApp = angular.module('app', ['ngMockE2E']);

You can utilize the mocks module both in unit tests and during application development.

Replicate the functionality of a backend API using AngularJS

Installation Attempt

Utilization Attempt

Answer №1

Answer №2

Answer №3

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