Testing Express REST API With Jest & Supertest

📚 Concepts & technologies covered
- Testing a REST API end-to-end with Supertest & mongodb-memory-server
- Mocking services
- Testing from the controller to the service

🌎 Follow me here:

[mikda]

1. 0:00 - Intro
2. 2:00 - Getting started & Setup
3. 5:10 - Creating test file for 'products'
4. 8:06 - Adding test command and running it
5. 9:24 - Refactoring in order to implement supertest
6. 15:50 - mongodb-memory-server (Author recommends mocking the service instead, this is demonstrated in chapter 10. )
7. 18:47 - Adding more tests
8. 25:22 - JWT
9. 29:54 - .skip and .only flags for jest
10. 30:54 - Test file for 'Users' (The authors recommended way: mocking out service instead of mongodb-memory-server)
11. 36:26 - Mocking out and 'spying on' userService
12. 41:27 - Running the first User test
13. 43:57 - Clearing mocks in between tests
14. 46:05 - Reseting mocks in between tests
15. 47:16 - Test creation of user access token (Last test in the tutorial)
16. 52:34 - Bonus: Jest extension for VSCode

[jritzeku]

This channel is a gem! I appreciate that you cover important and practical topics (i.e testing, TS) in great detail. I've seen some videos on the 2 topics mentioned above but not as as it pertains to Nodejs. Thank you and you definitely deserve more views/subscribers.

[narissatsuboi]

THANK YOU SO MUCH for making this video. I've been looking for a compare and contrast of mongo-memory-server and mocking services for quite awhile!

[eyeiozm]

I really like your use of multiple describe blocks here. I recently implemented something very similar for a project and have found having these tests is really helpful when refactoring. Thanks for the content!

[mohamedyoussef]

Best tutorial on YouTube so far... and I've been searching for months

[chrisjames]

Great testing video. Appreciate your time and effort with it. Found your channel a few weeks ago and have slowly been making my way through all the videos. :)

[dumbledoornguyen]

Hi Tom! Your authentication API video with typegoose and zod helped me tremendously. I know i will learn a lot from this, so Thank you for making this video!

[ayushpaharia]

Thanks for your efforts Tom. Love the video

[salmanrana]

Thanks for the awesom video. You made my TDD weekend fun.

[wralith]

This series is the best tutorial I've been following, thank you very much it is gold

[LifeShortBeNatty]

Amazing tutorials as always, love your Typescript/Mongoose/Express series

[jxlim]

This is the best tutorial ever, thank you Tom!

[Scetils]

This is awesome that your are expanding the same API. I hope this series keeps going!

[gustavoandr]

This video is exacly what I need ATM.
ChaiHttp just decided to stop working, also it have problems with ES6 import modules, so I really needed to learn how to use Supertest, also I learned a lot of good practices in this video. Dude, this video is a complete GOLD.

[tyengineer]

I am so genuinely excited for this you sir are a beacon of light in the coding world lol starting it now👌🏽💯

[huyennguyenmaingoc]

Thank you very much, this is exactly what I need for my practice :> There are extremely few videos about Jest comparing to Cypess. Luckily I found yours :>

[Ximaz-]

I'm really greatful for such tutorial. Before knowing about all taht stuuf, I asked myself : "How cna I test my API efficiently, with the most detailed tests possible and reproductibility ?". I almost started to cre&te tests using bash & curl, and starting my server as a daemon. I knew it was not the solution, so I didn't started yet. Thanks to your video, I know the correct way now.

[Jalak-govm]

Thank you so much man, learning alot from you.

[pscoriae]

I was absolutely clueless on how to mock my own functions. thank you so much

[good-dev-student]

Good video! I watched it for the second time.