Debugging tests

If your tests aren't working as you expect, you can debug them in both the default Node.js environment and in a real browser.

Debugging in Node.js

Debugging in the default Node.js environment is often the quickest way to diagnose issues that are not related to browser-specific APIs or rendering.

1. Run the ng test command with the --debug flag:
   shellCopy

   ng test --debug
   

2. The test runner will start in debug mode and wait for a debugger to attach.
3. You can now attach your preferred debugger. For example, you can use the built-in Node.js debugger in VS Code or the Chrome DevTools for Node.js.

Debugging in a browser

The same way you start a debugging session with in Node, you can use ng test with the --debug flag with Vitest and browser mode.

The test runner will start in debug mode and wait for you to open the browser devtools to debug the tests.