Built-in Postgres client with Bun.sql, built-in S3 object support with Bun.s3, a new text-based lockfile: bun.lock, Express is 3x faster, and a major update on Node.js compatibility.| bun.sh
The jest command line runner has a number of useful options. You can run jest --help to view all available options. Many of the options shown below can also be used together to run tests exactly the way you want. Every one of Jest's Configuration options can also be specified through the CLI.| jestjs.io
Mock functions are also known as "spies", because they let you spy on the behavior of a function that is called indirectly by some other code, rather than only testing the output. You can create a mock function with jest.fn(). If no implementation is given, the mock function will return undefined when invoked.| jestjs.io
The Jest philosophy is to work great by default, but sometimes you just need more configuration power.| jestjs.io
Slightly confusing conditions around Jest module mocks.| tigeroakes.com
Passionate programmer, experienced Extreme Programmer, Senior Agile Software Engineer @ VMware, remote worker from Spain, Open Source enthusiast, and avid learner with a focus on software craftsmanship, and IT security.| Domenico Luciani - How to mock with Jest and Typescript