def test_pop_02(self):
#test pop from empty workplan
wp = Workplan().work(10)
wp.pop()
#worplan now empty
self.assertRaises(IndexError, wp.pop)
def test_pop_01(self):
#get the next section from the workplan.
wp = Workplan().work(10).wait(20).work(30)
# get first section
section = wp.pop()
self.assertEqual(Work(10), section)
