Jasmine JavaScript Testing Framework Jasmine JavaScript 3

Question 1

What does `jasmine.arrayContaining()` check?

Accepted Answer

That the actual array contains at least all elements in the expected array

Answer

`jasmine.arrayContaining()` passes when the actual array includes every element listed in the argument.

Question 2

How do you prevent a test in Jasmine from running without deleting it?

Accepted Answer

Change `it` to `xit`

Answer

Changing `it` to `xit` marks the spec as pending so Jasmine skips it and reports it separately.

Question 3

Which Jasmine method lets you inspect what arguments were passed on a spy's nth call?

Accepted Answer

spy.calls.argsFor(n)

Answer

`calls.argsFor(n)` returns the argument array for the call at the specified zero-based index.

Question 4

When using `done` in an async Jasmine spec, what happens if `done` is never called?

Accepted Answer

The spec times out and is marked as failed

Answer

Jasmine waits up to the configured timeout and then fails the spec with a timeout error if `done` is not invoked.

Question 5

What is a Jasmine spy object created with `jasmine.createSpyObj('name', ['method1', 'method2'])`?

Accepted Answer

An object whose listed methods are all spies

Answer

`createSpyObj` returns a plain object where each named method is a pre-created Jasmine spy.

Jasmine JavaScript Testing Framework Practice Test