Jasmine JavaScript Testing Framework Jasmine Matchers and Expectations

Question 1

Which Jasmine matcher performs a deep equality check between two objects?

Accepted Answer

toEqual()

Answer

toBe()

Answer

toMatch()

Answer

toContain()

Question 2

What comparison operator does toBe() use internally?

Accepted Answer

Strict equality (===)

Answer

Deep equality

Answer

Loose equality (==)

Answer

Object.is() only for primitives

Question 3

Which Jasmine matcher checks that a value is not undefined?

Accepted Answer

toBeDefined()

Answer

toExist()

Answer

toBePresent()

Answer

toHaveValue()

Question 4

What does toContain() verify when used with an array?

Accepted Answer

That the array includes the specified element

Answer

That the array has the specified length

Answer

That the array starts with the specified element

Answer

That the array has no duplicate elements

Question 5

Which matcher verifies that a number is close to an expected value within a decimal precision?

Accepted Answer

toBeCloseTo(num, decimalPlaces)

Answer

toBeNear(num, range)

Answer

toBeWithin(min, max)

Answer

toApproximate(num, tolerance)

Question 6

What does toThrow() verify about a function passed to expect()?

Accepted Answer

That the function throws any exception when called

Answer

That the function throws a specific error type

Answer

That the function throws with a specific message

Answer

That the function never completes execution