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)

   def __init__(self, *args):

       BuiltinAssertionError.__init__(self, *args)

       if args: 

           self.msg = str(args[0])

       else: 

           f = sys._getframe(1)

           try:

               source = py.code.Frame(f).statement

               source = str(source.deindent()).strip()

           except py.error.ENOENT:

               source = None

               # this can also occur during reinterpretation, when the

               # co_filename is set to "<run>".

           if source:

->             self.msg = exprinfo.interpret(source, f, should_fail=True)

               if not self.args:

                   self.args = (self.msg,)

           else:

               self.msg = None

   def interpret(source, frame, should_fail=False):

       module = Interpretable(parse(source, 'exec').node)

       #print "got module", module

       if isinstance(frame, py.std.types.FrameType):

           frame = py.code.Frame(frame)

       try:

->         module.run(frame)

       except Failure, e:

           return getfailure(e)

       except passthroughex:

           raise

       except:

           import traceback

           traceback.print_exc()

       if should_fail:

           return "(inconsistently failed then succeeded)"

       else:

           return None

   def run(self, frame):

       for stmt in self.nodes:

           stmt = Interpretable(stmt)

->         stmt.run(frame)

   def run(self, frame):

       test = Interpretable(self.test)

       test.eval(frame)

       # simplify 'assert False where False = ...'

       if (test.explanation.startswith('False\n{False = ') and

           test.explanation.endswith('\n}')):

           test.explanation = test.explanation[15:-2]

       # print the result as  'assert <explanation>'

       self.result = test.result

       self.explanation = 'assert ' + test.explanation

->     if not frame.is_true(test.result):

           try:

               raise BuiltinAssertionError

           except passthroughex:

               raise

           except:

               raise Failure(self)