Jasmine JavaScript Testing Framework Jasmine JavaScript for Beginner's 3

Question 1

What is a Jasmine spy object created with `jasmine.createSpyObj`?

Accepted Answer

A mock object with multiple named spy methods

Answer

`jasmine.createSpyObj('name', ['method1','method2'])` returns an object whose properties are all pre-built spy functions.

Question 2

Which `calls` property tells you the total number of times a spy was invoked?

Accepted Answer

spy.calls.count()

Answer

`spy.calls.count()` returns the integer number of times the spy has been called.

Question 3

What does `spy.and.returnValue(42)` do?

Accepted Answer

Makes the spy always return 42 when called

Answer

`and.returnValue` configures the spy to return the specified value every time it is invoked.

Question 4

What does the `afterAll` hook do in Jasmine?

Accepted Answer

Runs once after all specs in the describe block finish

Answer

`afterAll` runs a teardown function exactly once after the last spec in the enclosing describe block has completed.

Question 5

How does Jasmine handle asynchronous specs that use `done`?

Accepted Answer

Jasmine waits until `done()` is called before marking the spec complete

Answer

When a spec function declares `done` as a parameter, Jasmine waits for `done()` to be called before finishing the spec.

Jasmine JavaScript Testing Framework Practice Test