, 4 tweets, 1 min read Read on Twitter
This pattern:

test('whatever', () => {
const foo = someThing()
// use foo
})

makes for a WAY simpler testbase than:

let foo
beforeEach(() => {
foo = someThing()
})

test('whatever', () => {
// use foo
})

Avoid mutable variables. Your tests will be easier to understand
To be clear, you can see what I recommend in kcd.im/aha-testing
Mostly what bothers me is sharing variables and nesting of `describe` blocks. I've written a lot of tests, and nesting makes them so much harder to follow.
There's obviously a lot of confusion around this. So I think I know how to get a write in my next blog post 😅
Missing some Tweet in this thread?
You can try to force a refresh.

Like this thread? Get email updates or save it to PDF!

Subscribe to Kent C. Dodds
Profile picture

Get real-time email alerts when new unrolls are available from this author!

This content may be removed anytime!

Twitter may remove this content at anytime, convert it as a PDF, save and print for later use!

Try unrolling a thread yourself!

how to unroll video

1) Follow Thread Reader App on Twitter so you can easily mention us!

2) Go to a Twitter thread (series of Tweets by the same owner) and mention us with a keyword "unroll" @threadreaderapp unroll

You can practice here first or read more on our help page!

Follow Us on Twitter!

Did Thread Reader help you today?

Support us! We are indie developers!


This site is made by just three indie developers on a laptop doing marketing, support and development! Read more about the story.

Become a Premium Member ($3.00/month or $30.00/year) and get exclusive features!

Become Premium

Too expensive? Make a small donation by buying us coffee ($5) or help with server cost ($10)

Donate via Paypal Become our Patreon

Thank you for your support!