Sinon quiz

Test your Sinon knowledge with a free interactive quiz — 20 questions with answers and explanations. No signup needed to play.

What is `sinon.createStubInstance(SomeClass)` used for?

1. What is `sinon.createStubInstance(SomeClass)` used for?
2. What is the key difference between a Sinon spy and a Sinon stub?
3. What does `sinon.assert.calledOnce(spy)` provide compared to manually checking `spy.callCount === 1`?
4. Why does testing code that depends on `Date.now()` or `new Date()` often benefit from Sinon's fake timers rather than just calling the real Date API?
5. What is a Sinon "spy"?
6. Can a Sinon stub be configured to behave differently on successive calls, e.g. failing the first time and succeeding after?
7. What is a Sinon "stub"?
8. What is Sinon.js?
9. What is a Sinon "mock," and how does it differ from a stub?
10. What is a potential downside of over-using stubs/mocks in a test suite?
11. Why is it important to call `.restore()` on a Sinon stub/spy after a test that replaced a method on a shared object?
12. What does `sinon.fake()` (the newer, simpler fake-creation API) offer compared to the classic spy/stub/mock APIs?

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