def test_bind(self):
value = 9
f = lambda a: a * 10
j = return_(value)
monad = j >= (lambda a: Just(f(a)))
self.assertEquals(Nothing(), monad)
def test_eq(self):
self.assertEquals(Nothing(), return_("blah"))
def test_eq(self):
self.assertTrue(Nothing() == return_("blah"))
self.assertFalse(Nothing() == None)
self.assertFalse(Nothing() == object())
