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Technology for testing nondeterministic client/server database applications

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3 Author(s)
Gwan-Hwan Hwang ; Dept. of Inf. & Comput. Educ., Nat. Taiwan Normal Univ., Taipei, Taiwan ; Sheng-Jen Chang ; Huey-Der Chu

The execution of a client/server application involving database access requires a sequence of database transaction events (or, T-events), called a transaction sequence (or, T-sequence). A client/server database application may have nondeterministic behavior in that multiple executions thereof with the same input may produce different T-sequences. We present a framework for testing all possible T-sequences of a client/server database application. We first show how to define a T-sequence in order to provide sufficient information to detect race conditions between T-events. Second, we design algorithms to change the outcomes of race conditions in order to derive race variants, which are prefixes of other T-sequences. Third, we develop a prefix-based replay technique for race variants derived from T-sequences. We prove that our framework can derive all the possible T-sequences in cases where every execution of the application terminates. A formal proof and an analysis of the proposed framework are given. We describe a prototype implementation of the framework and present experimental results obtained from it.

Published in:

IEEE Transactions on Software Engineering  (Volume:30 ,  Issue: 1 )