Automating Test Case Generation Based on Symbolic Execution for Railway Transportation Control Software

In areas such as railway transportation which need to ensure strict safety, Modified Condition/Decision Coverage(MC/DC) is always applied instead of traditional coverage criteria in software testing and more test cases of high quality are required. Aiming at the white-box unit testing of railway transportation control software, this paper proposes an automatic test case generation scheme for MC/DC coverage. Based on the mapping from MC/DC coverage to branch coverage, the scheme automatically generates test cases which achieves the highest MC/DC coverage of testing unit, so as to help testers detect the potential code defects due to which 100% MC/DC cannot be reached.