TY - GEN N1 - © 2018 Association for Computing Machinery. This version is the author accepted manuscript. For information on re-use, please refer to the publisher?s terms and conditions. AV - public Y1 - 2018/07/12/ SP - 368 EP - 371 TI - OASIs: Oracle assessment and improvement tool A1 - Jahangirova, G A1 - Clark, D A1 - Harman, M A1 - Tonella, P KW - Test oracle; oracle assessment; oracle improvement; test case generation; mutation testing CY - New York, NY, USA PB - ACM UR - http://dx.doi.org/10.1145/3213846.3229503 N2 - The oracle problem remains one of the key challenges in software testing, for which little automated support has been developed so far. We introduce OASIs, a search-based tool for Java that assists testers in oracle assessment and improvement. It does so by combining test case generation to reveal false positives and mutation testing to reveal false negatives. In this work, we describe how OASIs works, provide details of its implementation, and explain how it can be used in an iterative oracle improvement process with a human in the loop. Finally, we present a summary of previous empirical evaluation showing that the fault detection rate of the oracles after improvement using OASIs increases, on average, by 48.6%. ID - discovery10055112 ER -