您如何测试私有方法内部的异常，该方法由公共 void 使用？

Question

As the title says, I am testing that an exception is thrown inside a private method, which is then accessed by a public void. Any help would be appreciated.

Answer 1

You can use Assert.Throws to check that an exception is thrown. If the exception is not thrown then the test will fail:

var foo = new Foo();
Assert.Throws<MyException>(() => foo.DoSomething());

This test requires that MyException is thrown. If another exception (even one derived from MyException ) is thrown then the test will fail.

If you want to test for an exception or anything derived from that exception then you can use Assert.Catch :

var foo = new Foo();
Assert.Catch<MyException>(() => foo.DoSomething());