TestRigor is a test automation tool that simplifies the process of end-to-end testing for applications using technologies like WebSockets or XMPP, which require real-time message delivery between users. By allowing users to easily initiate and switch between multiple browsers or devices within test scripts, testRigor makes it straightforward to emulate scenarios where messages need to be sent and received instantaneously between different users. The testing process involves logging into the application, sending a message that is uniquely generated to prevent false positives, and verifying that the message appears on the recipient's screen. TestRigor's straightforward syntax is designed to be intuitive, even for users who are new to the platform, and offers a free trial for those interested in exploring its capabilities.