Test Automation Weekly

A recipe for fast, reliable end-to-end tests (no mocks): 1. Create a test DB instance. 2. Create SQL scripts to populate the test DB with enough data to test the app. 3. Create an automated process to quickly reset the test DB. 4. Reset the DB before starting the test suite. 5. (optional) For more speed and reliability, create one DB per test and run the tests in parallel.

Problem: Your code base probably contains a lot of copy/pasted code, but it's hard to find. Solution: jscpd jscpd is a command line tool that finds copy/pasted code and reports specific duplicated lines. Works for over 150 languages. Example report:

In TypeScript, I often prefer to use a Record over a switch statement. ✅ It's easy to read. ✅ It's typically less code. ✅ It's safer. With a switch, I have to do extra work to assure it's exhaustive. With a Record, if I forget to handle a case, it won't compile.

This is what it looks like to colocate related code. Long paths like this: "../../../../" Become short paths: "./" I like diffs like this. 👍