A user interface (“UI”) code coverage system and process determines the coverage by test code of UI Components in a computer program. In other words, the UI code coverage system and process determine whether the test code tests a UI Component. In at least one embodiment, the UI code coverage system and process identify the particular UI Components tested by the test code, provide coverage (i.e. tested) statistics, provide a visualization of the UI Component tested, provide a visualization of tested and not-tested (also referred to respectively as “covered” and “not covered”) UI Components of a UI Screen.