Testing of java web services for robustness

  • Authors:

  • Chen Fu;Barbara G. Ryder;Ana Milanova;David Wonnacott

  • Affiliations:

  • Rutgers University, Piscataway, NJ;Rutgers University, Piscataway, NJ;Rensselaer Polytechnic Institute, Troy, NY;Haverford College, Haverford, PA

  • Venue:
  • ISSTA '04 Proceedings of the 2004 ACM SIGSOFT international symposium on Software testing and analysis
  • Year:
  • 2004

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Abstract

This paper presents a new compile-time analysis that enables a testing methodology for white-box coverage testing of error recovery code (i.e., exception handlers) in Java web services using compiler-directed fault injection. The analysis allows compiler-generated instrumentation to guide the fault injection and to record the recovery code exercised. (An injected fault is experienced as a Java exception.) The analysis (i) identifies the exception-flow 'def-uses' to be tested in this manner, (ii) determines the kind of fault to be requested at a program point, and (iii) finds appropriate locations for code instrumentation. The analysis incorporates refinements that establish sufficient context sensitivity to ensure relatively precise def-use links and to eliminate some spurious def-uses due to demonstrably infeasible control flow. A runtime test harness calculates test coverage of these links using an exception def-catch metric. Experiments with the methodology demonstrate the utility of the increased precision in obtaining good test coverage on a set of moderately-sized Java web services benchmarks.