Abstract: E-Commerce systems are specialized instances of distributed processing systems. The Common Object Request Broker Architecture (CORBA) provides a sophisticated infrastructure to develop and deploy distributed objects. As systems become more complex and geographically distributed, it is becoming increasingly difficult to conduct cost-effective, systematic, and comprehensive testing on such systems. Using CORBA to facilitate the development and testing of E-commerce Development and Testing Approach (CDATA) which supports both functional and performance testing of multiple distributed CUTs (Components Under Test). The approach is illustrated by the implementation of an experimental E-commerce system and the corresponding testing architecture.