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Lesson 20 - PHP Testing - Quality Assurance, CAN PIG RIDE, and ISTQB

In the previous lesson, PHP Testing - Acceptance tests of commercial applications II, we showed sample codes of acceptance tests from real-world commercial applications. At the very beginning of the course, we explained the reason why to write tests at the first place, what kind of tests there are and what extra value they mean to us. My goal was to motivate you to test your applications and give you a competitive advantage over development teams managed by someone who doesn't understand software development (in practice, managers with just economic education, unfortunately, often manage such teams).

Until now, we have been very practical. But there are still some theories and terminology around testing that we should know and you're probably going to encounter it in your business. These are best practices, well-known documents, standards, and procedures. We also haven't mentioned the user interface testing. In the next two lessons, we're going to introduce this information to make your knowledge set complete. At the end of the course, we'll also try to stress test our PHP application.


SLA – Service Level Agreement

Service Level Agreement (SLA) is usually one of the documents between the software supplier (us) and the customer. Here we define how the software should work, how we guarantee it, and how flexible we intend to respond to events of downtime and failures in general. The bigger the project and the more money it cost, the more money is blown up when it stops working and the more pressure there will be on you putting it back into operation.

It always makes sense to define the SLA, no matter it's just a template e-shop for $1,000 or a government funded application for millions. Defines at least what you're responsible for, in what time-frame you're willing to fix errors (for example, 2 years since the delivery), and how much money you'll add new features for. Because the customer doesn't understand IT, they think, that


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In this PHP tutorial about testing web apps, we'll explain terms such as SLA, QA, SQA, go through CAN PIG RIDE and ISTQB practices (pesticides paradox).

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Article has been written for you by David Capka
The author is a programmer, who likes web technologies and being the lead/chief article writer at He shares his knowledge with the community and is always looking to improve. He believes that anyone can do what they set their mind to.
Unicorn university The author learned IT at the Unicorn University - a prestigious college providing education on IT and economics.
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