One of the most common testing tools is equivalence classes. Most testers generally understand what they are and how to use them. They allow us to do full coverage of an application without needing to test every possible permutation of input. Yet, despite their popularity I find that the two most important, the two most vital classes, get overlooked. Here I’ll cover these two classes and their implications on testing.
Despite a huge push for more testing of applications, online or off, there is actually not a lot of standardized systems for doing it. This is not to say there aren’t a lot of standard techniques, there simply lacks unifying by-the-book approaches which yield solid results. A lack of standards should however be no reason not to test your web application. Yet without clear guidance most providers kind of just try things thereby wasting a lot of effort and still ending up with a poor quality product. Here is a general overview of the five basic approaches to testing.