def testIt(self):
from basic import C, call_f
class D(C):
def f(self, x=10):
return x+1
d = D()
c = C()
self.assertEqual(c.f(), 20)
self.assertEqual(c.f(3), 6)
self.assertEqual(d.f(), 11)
self.assertEqual(d.f(3), 4)
self.assertEqual(call_f(c), 20)
self.assertEqual(call_f(c, 4), 8)
self.assertEqual(call_f(d), 11)
self.assertEqual(call_f(d, 3), 4)
