Test-Driven Java Development, Second Edition - Second Edition

Implementation

We already spoke about the importance of writing the simplest possible code that passes the specification.

Write the simplest code to pass the test. This ensures a cleaner and clearer design and avoids unnecessary features  The idea is that the simpler the implementation, the better and easier it is to maintain the product. The idea adheres to the KISS principle. It states that most systems work best if they are kept simple rather than made complex; therefore, simplicity should be a key goal in design and unnecessary complexity should be avoided.

This is a good opportunity to apply this rule. You might be inclined to write a piece of code similar to the following:

public void receiveCommands(String commands) { if (commands.charAt(0) ...