Chai vs Jest: What are the differences?
Chai and Jest are both open source tools. Jest with 26.4K GitHub stars and 3.57K forks on GitHub appears to be more popular than Chai with 6.39K GitHub stars and 575 GitHub forks.
According to the StackShare community, Jest has a broader approval, being mentioned in 273 company stacks & 161 developers stacks; compared to Chai, which is listed in 6 company stacks and 8 developer stacks.
As we all know testing is an important part of any application. To assist with our testing we are going to use both Cypress and Jest. We feel these tools complement each other and will help us get good coverage of our code. We will use Cypress for our end to end testing as we've found it quite user friendly. Jest will be used for our unit tests because we've seen how many larger companies use it with great success.