Abstract: A bottleneck problem，preventing aspect-oriented programming from massive application，is lack of mature techniques for aspect testing and conflicts detecting.Aiming at testing of aspect units，this paper presents a testing framework AJUnit for independent aspects，without weaving with base modules.The framework makes compiled details transparent by taking techniques of Java annotation and mapping between source code and byte code.Based on analysis of CFGs（Control Flow Diagrams） and DFGs（Data Flow Diagrams），AJUnit automates the testing process by use of techniques of generating test cases randomly，supplemented by optimizing of test cases with respect to test adequacy criterion，and from certain paths as well.This paper also outlines design and implementation of a testing tool for aspect units based on AJUnit.