Nunit中的assert消息中使用什么字符串格式传递args

Question

How can I create a string in Nunit and pass parameters to the error message

All (or almost all) Nunit asserts have a version that allows giving an error message with parameters.

For instance :

Assert.Null(object anObject);
Assert.Null(object anObject, string message, params object[] params);

What format do I need to use the message in, in order to use the params?

I've searched the documentation but it does not seem to show.

Answer 1

Misformatting the string, gives an exception that shows that internally this uses the String.Format Method from.Net

Meaning you can use {0} , {1} , etc to place arguments, with a lot of extra formatting options.

For example (not a very realistic case):

Assert.Equals(varExpectedValue, varActualValue, "Expected and actual value are false on iteration {0}", i);