unit testing(Unit testing is about testing a block of code in isolation. This essentially means that any dependency within the code will be mocked, and it is just the block of code which will be tested; русс. перевод встречается в кн.: Томас Д., Хэнссон Д.Х. Гибкая разработка веб-приложений в среде Rails. – СПб.: Питер, 2008. – 716 с.)
