The parameter names $expected, $actual make sense when you're comparing two things that you expect to be the same.
But for assertLessThan() (and similar assertions), these do not make sense. $expected is not the value you expect to get, since you expect the value you are testing to be less than $expected.
The parameter names $expected, $actual make sense when you're comparing two things that you expect to be the same.
But for assertLessThan() (and similar assertions), these do not make sense. $expected is not the value you expect to get, since you expect the value you are testing to be less than $expected.