Umbraco MSW Testing

What is it?

MSW (Mock Service Worker) enables testing Umbraco backoffice extensions by intercepting API calls and returning mock responses. This is ideal for testing error states, loading states, and edge cases without a running Umbraco instance.

When to Use

• Testing API error handling (404, 500, validation errors)
• Testing loading spinners and skeleton states
• Testing network retry behavior
• Testing edge cases without backend setup
• Adding API mocking to unit tests

Related Skills

• umbraco-testing - Master skill for testing overview
• umbraco-unit-testing - Unit testing patterns (combine with MSW)