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  • Book Overview & Buying Angular Services
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Angular Services

Angular Services

By : Sohail Salehi
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Angular Services

Angular Services

2 (1)
By: Sohail Salehi

Overview of this book

A primary concern with modern day applications is that they need to be dynamic, and for that, data access from the server side, data authentication, and security are very important. Angular leverages its services to create such state-of-the-art dynamic applications. This book will help you create and design customized services, integrate them into your applications, import third-party plugins, and make your apps perform better and faster. This book starts with a basic rundown on how you can create your own Angular development environment compatible with v2 and v4. You will then use Bootstrap and Angular UI components to create pages. You will also understand how to use controllers to collect data and populate them into NG UIs. Later, you will then create a rating service to evaluate entries and assign a score to them. Next, you will create "cron jobs" in NG. We will then create a crawler service to find all relevant resources regarding a selected headline and generate reports on it. Finally, you will create a service to manage accuracy and provide feedback about troubled areas in the app created. This book is up to date for the 2.4 release and is compatible with the 4.0 release as well, and it does not have any code based on the beta or release candidates.
Table of Contents (9 chapters)
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Why are test frameworks not practical here?


As we can see, the strategy explained previously sounds very much like usual tests. One might say, why can't we use unit tests instead of implementing another component/service for measuring accuracy? The answer is because our intention is not to test the application in order to find flaws. The point is, tests are a way to find flaws in what we EXPECT from a piece of code. Take a look at the following test, for example:

it('should test TF-IDF accuracy', () => { 
  expect(/* query outcome */).toBe(/* valid */); 
}); 

Note

The keywords such as "it", "expect", and "toBe" are the real function names used in testing. If you are interested in learning more about testing try: Jasmin Cookbook (https://www.packtpub.com/web-development/jasmine-cookbook).

So this code snippet here says we want 'to test TF-IDF accuracy' and we 'expect that our Custom Search Engine results are valid'. And how possibly can we guarantee that! As you might have guessed, there...

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