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Testing Tuesday Episode 18: How to Test Asynchronous JavaScript with Jasmine

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This is the 18th Testing Tuesday episode. Every week we share our insights and opinions on the software testing space. Drop by every Tuesday to learn more! Last week we spied on JavaScript methods with Jasmine.

Testing Asynchronous JavaScript Operations

In the last two Testing Tuesday episodes we got familiar with Jasmine. If you haven’t already, watching Testing Tuesday #16 will make it easier to follow along with this episode.

JavaScript is the perfect language for asynchronous operations. Although they make our apps fast, elegant and responsive, they are also a challenge to test.

Jasmine provides two strategies for testing asynchronous operations:

  1. Waiting for certain events to occur until a timeout
  2. Mocking the JavaScript clock and simulating that time passes

In this screencast we cover both strategies and show you which one is appropriate for which situation.

Up Next Testing Tuesday: Testing Node.js Applications

So far we’ve used Jasmine only in the web browser. Next week we’ll show you how to test your Node.js applications with Jasmine. If you’ve got any questions or suggestions, please leave us a comment!


The Performance Zone is brought to you in partnership with AppDynamics.  Learn the essentials of APM and how to implement best practices of application performance, better understand what it means to capture, analyze, and react to performance problems as they arise, and more specifically with .NET applications. 


Published at DZone with permission of Clemens Helm , DZone MVB .

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