def assertComponents(self, image, n):
topology = Topology()
topology.calculate(image)
ncomponents = 0
for component in topology.get_components():
ncomponents += 1
self.assertEqual(ncomponents, n)
def test_get_components_height(self):
image = self.chess_board()
image[self.SIZE/2, :] = 255
topology = Topology()
topology.calculate(image)
ncomponents = 0
for component in topology.get_components():
ncomponents += 1
self.assertEqual(ncomponents, 2)
