How To Write Unit Tests in Python • Pytest Tutorial

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Learn how to test your Python code by writing unit tests with the Pytest framework.

In this video I'll be covering how to write and run unit tests, how to check if an Error is raised, how to use test fixtures, and how to mock dependencies.

📚 Chapters

00:00 Introduction
02:45 Install Pytest and setup the project
04:14 Running your first unit test
06:50 Implement your test (with "assert")
11:24 How to test that an Error is raised
18:30 How to run a specific unit test file/method
19:50 How to see print statements in pytest
20:27 Implementing "get_total_price" test
23:10 Using pytest fixtures to set up context for your tests
27:00 When your tests depends on another module
30:50 How to mock dependencies (using unittest Mock)
34:30 Wrap-up

#pytest #python
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I just loved the way the entire tutorial was planned and executed. The build up was so apt. Loved every bit of it. Thanks for your time and effort. First time here - subscribed

soumyazyx
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This will rank in top 3 videos of all time in Python Unit Testing on YouTube. Had it been a category called 'Python Unit Test' in Academy Awards. It sure will win the Oscar.

abhishekanand
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really piqued my interest towards the end. great explanation. would love to see part 2 with more advanced test case scenarios. thanks

horoshuhin
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One of the best videos about testing I've ever watched, that's excellent, straight to the point

siewierap
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In Such a short time you have covered so many features of Pytest...That's Amazing !!!!
Loved the video and explanation!
Pytest is indeed a powerful test framework !!

Holasticlogger
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Very practical and accessible tutorial. I enjoy your concise and clear style. This is content with high sound to noise ratio. Subscribed!

barnabykent
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It was a great video it helped me a lot to get started with PYTEST, assert, fixtures and mock. I just loved it

janaeshkrish
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Thank you so much!! I used to think testing was hard and I was afraid to learn, but now I've changed that!
Great video🤩

r-wqly
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Solid tutorial, great explanation. I like the way it was the closest to hands on learning without having to actually be hands on.

Shawncres
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Thanks my friend. I can't thank you enough for the knowledge you just shared in just 35 minutes. I had absolutely 0 experience with Unit tests in general but now I really do. I really loved the way you started small and got a bit deeper. This is what most people just don't do. You probably know about Gall's law "All complex systems work, are built on top of simpler systems that worked" Hence, if you want to build a complex system, first build a simple system that works and build on top of that. Thank you. I really mean it. You just got a new subscriber. Abel

abelashenafi
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This is by far one of the best tutorial lessons! It's like every time I'm thinking 'but why that' you continue with explaining exactly what I wanted to know!

stankatsion
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Loved your straight-forward approach and building of functionality as you go. Excellent work. Thanks!

bryannahrwold
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EXCELLENT Tutorial. Love your approach and style to teaching. Very clear, concise and to the point! Thank you for posting!👍

ddawgncc
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Nicely done. No bullshit background music, and silly-ass fancy graphics and sound effects. Just good technical knowledge, explained well.

terryphelps
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Hey this was an EXCELLENT and concise intro to pytest! The explanations and examples were so clear, and went beyond the usual test video toy "x + y" drivel . I will strive to use the testing workflow model you demonstrated.

The almighty YT algo popped this video in after a recent freecodeacademy Pytest intro video - and honestly, this beats that one by far! And it is three times as long! In fact, I'm linking this video in that video's comments! You rock! And you got a new sub!

machinimaaquinix
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I got this video from google and assumed it was a popular channel. How is it only at 22k. Very well explained vs coming to the video with a bunch of testcases written

nawazhussain
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Great Video. I finally understood most about the pytest framework. Thamks friend

guipe
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This is one of the best videos on pytest I have seen. Thank you for it.

BruceElgort
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Great video. Please make more. You explain things without overcomplicating the process.

sleekunique
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Thanks for this tutorial, I'm new to Pytest and this was very helpful.

ChaosArtist