C＃如何快速生成正确的错误以进行测试

Question

I have some code in my error handler I need to test against a realistic error. How can I generate an error that has a full stack trace and is just as realistic as a runtime error.

I am using a general catch on an exception. So do not need a specific type of exception in this particular case.

Thanks

Answer 1

object m = null;
string s = m.ToString();

Instant NullReferenceException .

Answer 2

关于什么

throw new Exception("this is a test");

Answer 3

You can throw any kind of .Net exception by calling

throw new OutOfMemoryException();
throw new IndexOutOfRangeException();
throw new ArgumentNullException();

The exception names can be any dotnet exceptions. you can even create and throw your own specific exceptions.

To get a list of the CLR exceptions, in VS click on the debug menu and then the exceptions menu.

Answer 4

One DivideByZeroException coming up!:

int i = 0;
int j = 1 / i;

Answer 5

您可以生成空引用异常...或除零异常。

Answer 6

我建议你尝试使用模拟框架，例如Moq和Rhino Mocks，然后传入你希望捕获的相关Exception。

Answer 7

throw new IndexOutOfRangeException();

Answer 8

how about the good old division by zero?

5 / 0