def test_pop_back(self):
''' Must make the image with next smaller index active when the active is poped'''
chain.Insert_Image_Before(self.p_state) # add before active
self.assertEqual(system.Get_Index(self.p_state), 1) # active is 1st
chain.Pop_Back(self.p_state) # delete the last (active)
self.assertEqual(system.Get_Index(self.p_state), 0) # active is 0th
self.assertEqual(chain.Get_NOI(self.p_state), 1) # total 1 image
def tearDown(self):
''' clean the p_state '''
noi = chain.Get_NOI(self.p_state)
for i in range(noi - 1):
chain.Pop_Back(self.p_state)
self.assertEqual(chain.Get_NOI(self.p_state), 1)