Test Journey simulates the workflow with sample data. Enter test name, phone, email, etc. and run step-by-step. It mirrors the WorkflowExecutor: validates Ask nodes (name, phone, email, number, date, address, free text, location), handles reply buttons and list rows by payload/title, supports message_quick_reply, delay, agent_transfer, variable resolution, and Invalid port flow. Use Restart to run again. Fix any validation or routing issues before activating the workflow.