Abstract: A test automation facility for a data processing system is presented which relies on a browser application as a host environment. An initial file is loaded into a browser application window to create separate frames within the window, and the separate frames are used by the test automation facility for a variety of purposes. One of the frames contains a test automation facility interface with test case logic for verifying content, data, documents, or files received from a server. A server-side process, such as a filter servlet, can dynamically insert or modify a triggering element within a document that is sent to the test automation facility. When the browser loads the document containing the triggering element, the triggering element is interpreted to call a function that verifies contents of the document.