¿Cuál es la diferencia entre pruebas de humo y pruebas funcionales?

Smoke testing is done to make sure the application is testable, ie., its basic and critical features are working fine, here it is tested for only positive(correct) values and not for negative values. we don't take much time to do smoke testing. It is done bcos if we find the same bugs at a later point of time it will lead to lot of rework.

But in functional testing we test the functionality of all the features against the requirement thoroughly.

Fuente: http://ssoftwaretesting.blogspot.mx/2010/07/what-is-diff-between-smoke-testing-and.html