The standard PHPUnit assertion methods such as __assertEquals__, expect the first argument to be the expected value and the second
argument to be the actual value.
What is the potential impact?
Having the expected value and the actual value in the wrong order will not alter the outcome of tests, (succeed/fail when it should) but the error
messages will contain misleading information.
This rule raises an issue when the actual argument to an assertions library method is a hard-coded value and the expected argument is not.
