We know that Python provides a  lot of productivity over any compiled languages. We have programming in C# & need to write the unit test cases in C# itself. If we see the amount of code we write for unit test is approximately ten times more than the original code. 
Is it ideal choice to write unit test cases in IronPython instead of C#? Any body has done like that? I wrote few test cases, they seems to be good. But hairy pointy managers won't accept.
Python is excellent for UnitTesting C# code.  Our app is 75% in Python and 25% C#(Python.Net), and our unit tests are 100% python.  
I find that it's much easier to make use of stubs and mocks in Python which is probably one of the most critical components that enable one to write effective unittests.
IronPython For Unit Testing over C#