Integrating AngularJS with Other Frameworks

Categories: Angular Angular JS

Integrating AngularJS with Other Frameworks

 

AngularJS can be integrated into existing applications that use other frameworks. Those may be other JavaScript client-side frameworks or web frameworks like Spring MVC or CakePHP. You could take an application written in Java and add some new client-side functionality very easily using AngularJS, cutting development time considerably.

Adding a new AngularJS shopping cart to an existing Java application would be a good example to consider. The existing Java application could be written with the Spring framework and use Spring MVC as the web framework. Adding a shopping cart built with Java using Spring MVC could be time-consuming. That, however, would not be the case with AngularJS.

You could quickly build a shopping cart with AngularJS and be up and running in a few hours, easily integrating the cart into the existing Java application. Not only would you be able to build the cart faster, but you could quickly add unit testing to increase coverage and reduce the application’s defects. AngularJS was designed to be testable from the very beginning; that is one of the key features of AngularJS and a major reason for selecting it over other JavaScript client-side frameworks. We will talk about testing AngularJS applications in the next section.

 

Testing AngularJS Applications

 

In recent years continuous integration (CI) build tools such as Travis CI, Jenkins, and others have risen in popularity and usage. CI tools can run test scripts during a build process and give immediate feedback by way of test results. CI tools help to automate the process of testing software and can often alert  developers of software defects as soon as they occur.

Two types of AngularJS tests integrate well with CI tools. The first type of testing is unit testing. Most developers are familiar with unit testing; they can often identify software defects early in the development process by testing small units of code.

The second type of testing is end-to-end (E2E) testing. E2E testing helps to identify software defects by testing how software components connect and interact.

There are many testing tools used for unit testing AngularJS applications. Two of the most popular are Karma and JS Test Driver. Karma, however, is quickly becoming the top choice for AngularJS development teams. The most popular E2E test tool for end-to-end testing of AngularJS applications is a new tool called Protractor. Both tools integrate well with CI build tools.

Large AngularJS development teams will find testing AngularJS applications with continuous integration tools to be a huge time-saver. Often a failed CI test is the first indication of a defect for large teams. Small teams will also see many advantages to based testing. AngularJS developers should always develop both unit tests and end-to-end tests whenever possible.

Throughout this book, we will cover both unit testing and end-to-end testing. We will use both Karma and JsTestDrive for unit testing, and we will use Protractor for E2E testing.

 

Conclusion

We will cover models, views, and controllers in great detail in later chapters, using those components to build working applications that show the power of AngularJS. We will show how all three components work together to simplify the job of building JavaScript client-side applications. We will also cover building both unit tests and end-to-end tests for AngularJS applications.

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