Testing GET endpoints in Express - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of testing GET endpoints in Express?

Testing GET endpoints ensures that the server correctly responds to client requests by returning the expected data and status codes.

beginner

Which tool is commonly used to test Express GET endpoints in JavaScript?

Supertest is commonly used to test Express GET endpoints because it allows sending HTTP requests and checking responses easily.

beginner

What does the status code 200 mean in a GET endpoint test?

Status code 200 means the GET request was successful and the server returned the requested data.

intermediate

How do you check the response body in a GET endpoint test using Supertest?

You use the .expect() method with a function or value to verify the response body matches what you expect.

intermediate

Why is it important to test edge cases in GET endpoints?

Testing edge cases ensures the endpoint handles unexpected or unusual requests gracefully without crashing or returning wrong data.

Which HTTP method is used to retrieve data from a server?

A POST

B DELETE

C PUT

D GET

GET is the HTTP method used to request data from a server.

What library helps test Express endpoints by simulating HTTP requests?

A Mocha

B Supertest

C Chai

D Jest

Supertest is designed to test HTTP endpoints by sending requests and checking responses.

In a test, what does checking for status code 404 mean?

A Resource was not found

B Request was successful

C Server error occurred

D Request was redirected

Status code 404 means the requested resource was not found on the server.

Which method in Supertest is used to verify the response status code?

A .expect()

B .post()

C .get()

D .send()

The .expect() method is used to check response status, headers, or body.

Why should you test GET endpoints with invalid parameters?

A To increase code size

B To check server speed

C To ensure proper error handling

D To avoid writing tests

Testing invalid parameters ensures the server handles errors properly without crashing.

Explain how to write a simple test for an Express GET endpoint using Supertest.

Think about sending a GET request and checking the response.

Describe why testing GET endpoints is important in web development.

Consider what happens if the endpoint breaks or returns wrong data.