9. A computer program product for fault alerting in mock object supported unit testing, the computer program product comprising: a computer readable storage medium having computer readable program code embodied therewith, the computer readable program code comprising: computer readable program code for creating an instance a mock object implementing an invocation handler and proxying for an object under test by test code; computer readable program code for proxying by method name an invocation of a method in the object under test to the mock object; computer readable program code for determining whether or not a method exists in memory for the mock object corresponding to the method name; and, computer readable program code for invoking an exception handler for the mock object outputting error text indicating a non-presence of a method associated with the method name responsive to a method by the method name not existing for the mock object, but otherwise invoking a method that exists for the mock object corresponding to the method name.
12. The computer program product of claim 9 , wherein the determination of whether or not the method exists in memory for the mock object corresponding to the method name also includes determining whether or not the method exists in memory for the mock object corresponding to the method name and a method signature.