使用增强单元测试来测试exit（）

Question

我想问一下，是否可以通过Boost Unit Test库测试exit()或测试返回代码？

Answer 1

There is BOOST_CHECK_THROW() to verify that an exception (of a certain type) is thrown. You usually shouldn't be calling exit() in your library code at all--throw exceptions and let the higher levels of the call stack decide whether to exit or not.

Boost Test expects to be able to control the "main" application itself, so if you call exit() I'm not really sure what you would want Boost Test to do next. Trap the exit() call and not let the program exit? What if your library actually depended on exit() working normally?