Asserting response bodies in Cypress - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of asserting response bodies in Cypress tests?

Asserting response bodies ensures that the data returned from an API or server matches the expected values, confirming the application behaves correctly.

beginner

How do you access the response body in a Cypress test after intercepting a request?

You use the cy.intercept() command to spy on the request, then in the then() callback, access response.body to assert its contents.

beginner

Example: What does this assertion check?<br>

expect(response.body).to.have.property('success', true)

It checks that the response body has a property named success and that its value is true.

intermediate

Why is it important to assert specific fields in the response body rather than the entire body?

Asserting specific fields makes tests more stable and focused, avoiding failures due to unrelated changes or extra data in the response.

beginner

What Cypress command helps you wait for a network request and then assert its response body?

The cy.wait() command waits for the intercepted request to complete, allowing you to access and assert the response body.

Which Cypress command is used to intercept and spy on network requests?

A cy.request()

B cy.intercept()

C cy.visit()

D cy.get()

cy.intercept() is used to spy on or stub network requests, allowing you to assert on request and response data.

How do you access the response body inside a cy.intercept() callback?

A response.body

B response.status

C response.headers

D response.url

The response body is accessed via response.body to check the data returned from the server.

What does this assertion check?<br>expect(response.body.data).to.have.length(3)

A Response body has 3 properties

B Response body is empty

C Response status is 3

D Response body has a data array with 3 items

It checks that the data property in the response body is an array with exactly 3 items.

Why should you avoid asserting the entire response body in tests?

A Because the entire body may change and cause flaky tests

B Because Cypress does not support full body assertions

C Because response bodies are always empty

D Because assertions slow down tests

Asserting the entire body can cause tests to fail if unrelated data changes, making tests less reliable.

Which command waits for a network request to finish before asserting its response?

A cy.visit()

B cy.get()

C cy.wait()

D cy.intercept()

cy.wait() pauses the test until the intercepted request completes, allowing assertions on the response.

Explain how to assert a JSON response body property in a Cypress test after intercepting a network request.

Think about how to capture and check data returned from the server.

Why is it better to assert specific fields in a response body rather than the entire body in Cypress tests?

Consider how changes in data can affect test reliability.