'For two instances of L{DelayedCall} C{a} and C{b}, C{a > b} is true
if and only if C{a} is scheduled to run after C{b} or at the same
time as C{b}.'

def test_ge(self):

    (zero, one) = (self.zero, self.one)
    self.assertTrue((one >= zero))
    self.assertFalse((zero >= one))
    self.assertTrue((zero >= zero))
    self.assertTrue((one >= one))
