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Lesson 10 - Unit tests of Commercial Applications II

In the previous lesson, Unit Tests of Commercial Applications I, we began showing unit test source codes of real commercial applications. We learned especially how to mock the date and time in PHP. In today's tutorial, we're going to show how to easily test random value generators, database wrappers, and how to test larger number of exceptions using anonymous functions.

Testing random values

In programming, it often comes in handy to generate a random string. We use them, for example, as discount voucher codes, various email tokens, or as temporary passwords. From the security point of view, it's a good idea to make sure they're really random, breaking them by some update probably wouldn't be a good thing. But how to test a random output?

The basic test is usually to check the


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In the tutorial, we'll test random value generators, show a database wrapper test, and test multiple exceptions through anonymous functions.

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Article has been written for you by David Capka Hartinger
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 David learned IT at the Unicorn University - a prestigious college providing education on IT and economics.