Part of twisted.trial.unittest View Source View In Hierarchy
TestCase as 
'todo'. Tests marked 'todo' are reported differently in Trial TestResults.
If todo'd tests fail, they do not fail the suite and the errors are 
reported in a separate category. If todo'd tests succeed, Trial TestResults 
will report an unexpected success.
| Parameters | reason | A string explaining why the test is marked 'todo' | 
| errors | An iterable of exception types that the test is expected to raise. If 
one of these errors is raised by the test, it will be trapped. Raising any 
other kind of error will fail the test. If None is passed, 
then all errors will be trapped.
 | 
| Parameters | failure | A twisted.python.failure.Failure.
 | 
| Returns | True if failure is expected, 
False otherwise.
 | |