Book Image

JavaScript Unit Testing

By : Hazem Saleh
Book Image

JavaScript Unit Testing

By: Hazem Saleh

Overview of this book

<p>The largest challenge for many developers’ day to day life is ensuring the support of, and assuring the reach of, their product. With the ever increasing number of mainstream web browsers this is becoming a more difficult task for JavaScript coders. <br /><br />From the beginning, JavaScript Unit Testing will show you how to reduce the time you spend testing, and automate and ensure efficiency in guaranteeing your success.<br /><br />JavaScript Unit Testing will introduce and help you master the art of efficiently performing and automating JavaScript Unit tests for your web applications.<br /><br />Using the most popular JavaScript unit testing frameworks, you will develop, integrate, and automate all the tests you need to ensure the widest reach and success of your web application.<br /><br />Covering the most popular JavaScript Unit testing frameworks of today, JavaScript Unit Testing is your bible to ensuring the functionality and success of all of your JavaScript and Ajax Web Applications.<br /><br />Starting with Jasmine, you will also learn about, and use, YUITest, QUnit, and JsTestDriver, integrate them into your projects, and use them together to generate reports.<br /><br />Learn to automate these tools, make them work for you, and include the power of these tools in your projects from day one.</p>
Table of Contents (12 chapters)

Writing your first Jasmine test


Before writing the first Jasmine test, we will need to understand the difference between a suite and a spec (test specification) in Jasmine. A Jasmine suite is a group of test cases that can be used to test a specific behavior of the JavaScript code (a JavaScript object or function). In Jasmine, the test suite begins with a call to the Jasmine global function describe with two parameters. The first parameter represents the title of the test suite, while the second parameter represents a function that implements the test suite.

A Jasmine spec represents a test case inside the test suite. In Jasmine, a test case begins with a call to the Jasmine global function it with two parameters. The first parameter represents the title of the spec and the second parameter represents a function that implements the test case.

A Jasmine spec contains one or more expectations. Every expectation represents an assertion that can be either true or false. In order to pass the...