def test_compile_and_getsource(self):

       co = self.source.compile()

       exec co

       f(7)

->     excinfo = py.test.raises(AssertionError, "f(6)")

       frame = excinfo.traceback[-1].frame 

       stmt = frame.code.fullsource.getstatement(frame.lineno)

       #print "block", str(block)

       assert str(stmt).strip().startswith('assert')

   def raises(ExpectedException, *args, **kwargs):

       """ raise AssertionError, if target code does not raise the expected

           exception.

       """

       assert args

       __tracebackhide__ = True 

       if isinstance(args[0], str):

           expr, = args

           assert isinstance(expr, str)

           frame = sys._getframe(1)

           loc = frame.f_locals.copy()

           loc.update(kwargs)

           #print "raises frame scope: %r" % frame.f_locals

           source = py.code.Source(expr)

           try:

->             exec source.compile() in frame.f_globals, loc

               #del __traceback__

               # XXX didn'T mean f_globals == f_locals something special?

               #     this is destroyed here ...

           except ExpectedException:

               return py.code.ExceptionInfo()

       else:

           func = args[0]

           assert callable

           try:

               func(*args[1:], **kwargs)

               #del __traceback__

           except ExpectedException:

               return py.code.ExceptionInfo()

           k = ", ".join(["%s=%r" % x for x in kwargs.items()])

           if k:

               k = ', ' + k

           expr = '%s(%r%s)' %(func.__name__, args, k)

       raise ExceptionFailure(msg="DID NOT RAISE", 

                              expr=args, expected=ExpectedException) 

-> f(6)

   def f(x):

       assert (x ==

               3 +

->             4)