Writing tests Test configuration Runtime behavior Finding tests Lifecycle hooks Mocks Snapshots Dates and times DOM testing Code coverage Test Reporters

Snapshots

Learn how to use snapshot testing in Bun to save and compare output between test runs

Mocks

Learn how to create and use mock functions, spies, and module mocks in Bun tests

Dates and times

Learn how to manipulate time and dates in your Bun tests using setSystemTime and Jest compatibility functions

On this page

Basic Snapshots Snapshot Files Updating Snapshots Inline Snapshots Using Inline Snapshots Error Snapshots Advanced Snapshot Usage Complex Objects Array Snapshots Function Output Snapshots React Component Snapshots Property Matchers Best Practices Keep Snapshots Small Use Descriptive Test Names Group Related Snapshots Handle Dynamic Data Managing Snapshots Reviewing Snapshot Changes Organizing Large Snapshot Files Troubleshooting Snapshot Failures Platform Differences