Assuming the same time constraints, time spent writing tests competes with time spent writing product code. Ideally, tests save more time than would otherwise h

Assuming the same time constraints, time spent writing tests competes with time spent writing product code. Ideally, tests save more time than would otherwise have been spent debugging and/or save time and money by catching bugs early. In bad cases you get no return on the time spent writing tests and simply end up with less product code (similar bugs/LOC, so fewer bugs and reduced features). In terrible cases you end up with rushed product code and more bugs/LOC.