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. 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?
3. What does `sinon.sandbox` (or the modern `sinon.createSandbox()`) help manage?
4. What does `sinon.stub(object, 'methodName')` do?
5. What is a Sinon "fake timer" (`sinon.useFakeTimers()`) used for?
6. How can a Sinon stub be configured to simulate an asynchronous function that resolves with a specific value?
7. What does `stub.calledWith(arg1, arg2)` check?
8. What is the key difference between a Sinon spy and a Sinon stub?
9. Why is it important to call `.restore()` on a Sinon stub/spy after a test that replaced a method on a shared object?
10. Can a Sinon stub be configured to behave differently on successive calls, e.g. failing the first time and succeeding after?
11. What is a Sinon "stub"?
12. What is a Sinon "spy"?

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