By Jim Lavin
Layout, construct, and attempt prone to create a starting place on your AngularJS applications
About This Book
Understand how companies are an essential part of the AngularJS framework and the way leveraging companies can profit your applicationDesign and constitution your AngularJS prone and study the easiest practices utilized in designing AngularJS servicesEffectively write, attempt, and eventually install your application
Who This booklet Is For
What you are going to Learn
Write Jasmine situations to check your AngularJS services
Implement universal performance that may be leveraged by way of the controllers, directives, and different prone on your application
Build companies that create, retrieve, replace, and delete your application's information on exterior servers
Move enterprise good judgment to the buyer facet to construct a brand new category of serverless applications
Optimize your AngularJS program for optimum performance
This booklet will give you the talents and top practices had to create AngularJS providers. It starts off with the basics of what companies are and their position in a customary AngularJS software. you are going to stroll throughout the improvement of a real-world software utilizing prone around the numerous program layers after which circulation directly to create companies that supply cross-cutting matters corresponding to messaging, logging, and authentication.
Next, the ebook covers prone that supply info entry displaying you ways to engage with exterior cloud-based info providers and the way to cache information at the customer to lessen community latency. The publication then exhibits you ways to write down companies that leverage different cloud-based prone to create mashups and comprise performance on your software with out writing loads of code.
You also will create enterprise good judgment gadgets, principles engines, and finite kingdom machines, which might be used to supply enterprise common sense in your program.
Read Online or Download AngularJS Services PDF
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Extra info for AngularJS Services
However, you don't always have to use the provider method to allow your services to be configured. You can use both the service and factory methods to define your service and provide configuration methods that can be called in a module's run method, which executes after your application has been bootstrapped. You just need to ensure your service follows the design practices we discussed earlier and doesn't try to call any external services as it is instantiated. No matter how you create your services, by providing functionality to configure the services you create, you make your services more flexible, easier to use, and reduce the complexity required to include them in an application.
Thankfully, you don't need to mock any of the services provided by AngularJS, as the AngularJS Mocks library provides mocks for many of the services you will interact with. However, you need to mock the other services that are part of your application. [ 38 ] Chapter 3 One of the things that makes mocking services easy is AngularJS' dependency injection functionality. If we need to mock out services in our application, we can define a mock service in our unit test; we can register this service with AngularJS to replace the other service.
The when methods provide a fake backend for your service, which doesn't assert if a particular request was made or not; it just returns a canned response if a request is made. The test will pass whether or not the request is made during testing. Both sets of methods take two mandatory parameters: the method being used in the request and the URL being called. They also take two optional parameters: the HTTP request body and the HTTP headers. If the parameters do not match when the call is made, an exception will be thrown, thus failing the test.
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