The reason that the Only<T> function is being deprecated is that it breaks AAA testing, whereby the Action is actually also performing the Assert. Proper tests should be composed by calling Catch.Exception() and then asserting the exception type using exception.ShouldBeOfExactType<T>().
The reason that the
Only<T>function is being deprecated is that it breaks AAA testing, whereby the Action is actually also performing the Assert. Proper tests should be composed by callingCatch.Exception()and then asserting the exception type usingexception.ShouldBeOfExactType<T>().