Which of the following tools would be used for automated testing within the MuleSoft ecosystem?

Within the MuleSoft ecosystem, Munit is specifically designed for automated testing of Mule applications and APIs. It provides developers with a framework to create unit and integration tests for Mule flows, ensuring that the components work as intended and continue to do so as changes are made over time. Munit allows for the simulation of various scenarios, the assertion of expected outcomes, and detailed reporting of test results, which are crucial for maintaining the reliability of integrations.

In contrast, the other tools serve different purposes. API Manager is primarily used for managing APIs, including monitoring and securing their usage, but it does not provide testing capabilities. DataWeave is a powerful transformation language used to manipulate and transform data, but it is not focused on testing functionality. Exchange is a repository for sharing APIs, assets, and connectors, but like the other two options, it does not offer automated testing features. Thus, Munit stands out as the go-to tool for automated testing within the MuleSoft environment.