Test doubles huma oġġetti li jinqalbu għal dipendentzi reali fit-tests — inklużi mocks, stubs, spies, fakes, u dummies. Jiizolaw il-kodiċi test minn id-dipendentzi tiegħu (databases, APIs, servizzi), li jippermettu unit tests mabdula, fokussati, u kkontrollati.
Għaliex test doubles
To test a unit in ISOLATION, replace its real dependencies (DB, API, services) with
TEST DOUBLES (fake stand-ins):
→ isolate the unit (test ONLY it, not its dependencies)
→ FAST (no real DB/network); CONTROLLED (set up exact scenarios, including errors);
DETERMINISTIC (no external flakiness)
