软件工程中的测试用例是一组条件或变量，测试者根据它来确定应用软件或软件系统是否正确工作。确定软件进程或系统是否通过测试的方法叫做测试准则。

测试用例的测试过程通常可以一步完成，有时需要连续的几步。通常会给出期望的结果或现象。除此之外，还可以给出如下信息：

测试完成后还可以追加或完善如下信息：

大型测试用例还可能包括前提状态及相关描述。

书面格式的测试用例还应含有填写实际测试结果的空间。

A test case, in software engineering, is a set of conditions under which a tester will determine whether an application, software system or one of its features is working as it was originally established for it to do. The mechanism for determining whether a software program or system has passed or failed such a test is known as a test oracle. In some settings, an oracle could be a requirement or use case, while in others it could be a heuristic. It may take many test cases to determine that a software program or system is considered sufficiently scrutinized to be released. Test cases are often referred to as test scripts, particularly when written - when they are usually collected into test suites.