In the previous chapter about architecture, we mentioned that for every computer system, the outputs yielded from the system depend only on the sequence of inputs provided to it. According to this claim, we said that we must control all the inputs in order to determine what the output should be in a particular test. However, this claim also implies that we need to re-initialize the system before each test!
In order to understand what it means, let’s start from a very simple example: if we test the Calculator application on Windows and press “1”, “+”, “1”, and “=” we expect ...
