1. Oracle Cloud Infrastructure Documentation, Using Integrations in Oracle Integration 3: In the section "Activate, Monitor, and Manage Integrations," the subsection "Test Integrations" explicitly states: "You can test integrations that are triggered by a REST Adapter or SOAP Adapter connection from the Test page. For all other types of integrations, you must invoke them from the appropriate trigger connection."
2. Oracle Cloud Infrastructure Documentation, Using Integrations in Oracle Integration Generation 2: The chapter "Manage Integrations" includes the section "Test REST Adapter and SOAP Adapter-Triggered Integrations," which details the process. It confirms that only these two trigger types are supported for testing through the designer's Test page.