writing-bundler-tests

Writing reliable bundler tests in Bun involves using itBundled and expectBundled to verify bundling outputs. This approach provides standardized templates for setting up multi-file scenarios and runtime assertions to ensure consistent behavior.

The best way to test ESM and CJS interop is using itBundled to apply practical patterns for common bundling scenarios. You can configure option variations and runtime assertions to catch regressions early and ensure repeatable results.

Organizing test files and entry points for Bun bundler scenarios involves placing tests in a test/bundler directory. The itBundled skill provides clear guidelines for structuring multi-file setups to validate runtime behavior effectively.

Yes, you can use itBundled to test bundler error cases in Bun projects. The skill provides practical patterns for common bundling scenarios, including option variations and error cases, to maintain repeatable test results.

Bun bundler tests become brittle and hard to scale without a structured approach to organizing test files and runtime assertions. Using itBundled and expectBundled provides standardized templates to catch regressions early and ensure consistent bundling behavior.