expect() for BDD assertions in Cypress - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of expect() in BDD assertions?

expect() is used to write readable tests that check if a value meets certain conditions. It helps confirm that the app behaves as expected.

beginner

How do you check if a number is equal to 5 using expect()?

You write expect(number).to.equal(5). This asserts that the variable number should be exactly 5.

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What does expect(value).to.be.true check?

It checks that the value is exactly true. This is useful for boolean conditions.

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How can you check if a string contains a word using expect()?

Use expect(string).to.include('word'). This checks if the string has the word anywhere inside it.

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What happens if an expect() assertion fails during a test?

The test will stop and show a failure message explaining which check did not pass. This helps find bugs quickly.

Which expect() assertion checks if a value is greater than 10?

A expect(value).to.be.greaterThan(10)

B expect(value).to.be.above(10)

C expect(value).to.equal(10)

D expect(value).to.include(10)

to.be.above(10) is the correct syntax in Cypress BDD assertions to check if a value is greater than 10.

What does expect(array).to.have.length(3) verify?

A Array has at least 3 items

B Array is empty

C Array contains the number 3

D Array has exactly 3 items

This assertion checks that the array length is exactly 3.

How do you assert that a variable isActive is false?

A expect(isActive).to.be.false

B expect(isActive).to.equal(true)

C expect(isActive).to.be.true

D expect(isActive).to.include(false)

to.be.false checks that the value is exactly false.

Which assertion checks if a string starts with 'Hello'?

A expect(str).to.have.length('Hello')

B expect(str).to.include('Hello')

C expect(str).to.startWith('Hello')

D expect(str).to.equal('Hello')

to.startWith('Hello') checks if the string begins with 'Hello'.

What is the main benefit of using expect() in tests?

A To check if code meets expected results clearly

B To write complex loops

C To style the webpage

D To create variables

expect() helps write clear checks that confirm code works as expected.

Explain how expect() is used in Cypress to verify that a button is visible on the page.

Think about how you find elements and check their state.

Describe the difference between expect(value).to.equal() and expect(value).to.include().

Consider whole vs part matching.