fuzz testing

Fuzz testing discovered a critical edge case in the lending contract that no hand-written test had caught.模糊测试在借贷合约中发现了一个关键的边界情况，这是任何手写测试都没有捕捉到的。

Automated fuzz testing with tools like Echidna or Foundry's fuzzer is now a standard part of smart contract auditing.使用 Echidna 或 Foundry 的 fuzzer 等工具进行自动化模糊测试，现在已成为智能合约审计的标准部分。