Which tool is used to automate testing of Mule applications?

• A. JUnit
• B. MUnit
• C. Selenium
• D. Postman

Answer: (B)

Automated testing of Mule applications uses MUnit. MUnit is a testing framework built specifically for MuleSoft flows and components, and it’s integrated into the Mule runtime and Anypoint Studio. It lets you create test suites that exercise your Mule flows, mock external systems, and verify outcomes by asserting payloads, variables, and message attributes. Tests can be run automatically as part of a build or CI pipeline, making it ideal for ensuring changes don’t break Mule apps.

General Java testing tools like JUnit don’t provide Mule-specific testing primitives out of the box, Selenium is for automating browser UI, and Postman is focused on API testing rather than internal Mule flow logic. MUnit is the right fit for automating tests directly against Mule applications.