Test Case Generation for Cross-Blockchain Smart Contract

With the development of blockchain technology, an increasing number of users are adopting cross-blockchain smart contracts, which necessitates effective testing methods due to digital asset security concerns. However, few work specifically tailored for cross-chain smart contracts. In this paper, we propose a test case generation method for cross-chain contracts based on the ant colony algorithm. This method conducts data flow analysis on the cross-chain smart contract to identify the critical information related statements. These statements are then subjected to mutation operations to create mutants. Subsequently, test cases are generated with an improved ant colony algorithm to kill as many mutants as possible. Theoretically, this method can effectively detect faults in critical information related handling in cross-chain smart contracts.