How to use PHPUnit on procedural code

[dennis-fedco]

I have some long block of code
 

//features.php
elseif ($feature=="X") {
    //...utter mess to be refactored..
    if ($motor>0)
    {
        $a = getFeature($motor, $featureSpec);
        $b = getFlightInfo($motor, $flightNumber);
        $c = getWeather($motor);
    }
} elseif ($feature=="Y") {
  //  ...utter mess to be refactored..
} elseif ($feature=="Y") {
  //  ...utter mess to be refactored..
}

It is difficult to trace, but I can find out if features.php is included into some other files, and who calls it.  In fact this may be a tangled mess, but that being said, do I need to know all the details, or can I stick PHPUnit on a certain blocks of code and just run with it?

 

Like, say I want to test the if ($motor>0) block.  Can I do this, without knowing anything else, like where is features.php included, and so on?  If so, how do I test this?  How do I inject PHPUnit's test into normal code execution? 

Edited February 18, 2014 by dennis-fedco

[KevinM1]

PHPUnit isn't something that can be popped into existing code. You need to create a separate test with it based on your existing code, run it, and see if it does what you want.