Testing Meteor 3 apps

meteortesting:mocha is the canonical Meteor test driver. It boots the app in test mode (no app code runs except the test files) and reports results in the server console.

If an existing test fails, hangs, or flakes and the failing layer is unknown, use meteor-debugging to isolate the cause. Return here when evidence points to test setup, design, driver behavior, fixtures, or regression coverage.

Decision flow