To Do in Rectangle.java:


constructor 1: Test positive, negative, zero, equal. Fix to handle negative numbers, case where l=1.

constructor 2: Test positive, negative, zero, equal. Fix to handle case where l = w, use constructor 1. 

getLength: Test w/ constructors.

getWidth: Test w/ constructors. Fix to handle null case (return length if square).

setLength: Test positive, negative, zero, equal to width. Fix shadowing.

setWidth: Test positive, negative, zero, equal to length. Fix shadowing.

getArea: Test square, not square. Fix square case. (Need for both tests should be obvious from branching/structure after you fix square case). 

getPerimeter: Test square, not square. Make match specification.