def test_one_col_image(self):
width = 1
height = 100
resolution = 100
pi = 40
row = math.floor(pi / width)
n4 = mtlib.get_4_neighbors(width, height, resolution, pi, row)
n8 = mtlib.get_8_neighbors(width, height, resolution, pi, row)
self.assertEqual(2, len(n4))
self.assertEqual(39, n4[0])
self.assertEqual(41, n4[1])
self.assertEqual(n4, n8)
def test_lower_left_corner(self):
width = 20
height = 10
resolution = 200
pi = 199
row = 9
n4 = mtlib.get_4_neighbors(width, height, resolution, pi, row)
n8 = mtlib.get_8_neighbors(width, height, resolution, pi, row)
self.assertEqual(2, len(n4))
self.assertTrue(198 in n4)
self.assertTrue(179 in n4)
self.assertEqual(3, len(n8))
self.assertTrue(all(pi in n8 for pi in n4))
self.assertTrue(178 in n8)
def test_upper_right_corner(self):
width = 20
height = 10
resolution = 200
pi = 19
row = 0
n4 = mtlib.get_4_neighbors(width, height, resolution, pi, row)
n8 = mtlib.get_8_neighbors(width, height, resolution, pi, row)
self.assertEqual(2, len(n4))
self.assertTrue(18 in n4)
self.assertTrue(39 in n4)
self.assertEqual(3, len(n8))
self.assertTrue(all(pi in n8 for pi in n4))
self.assertTrue(38 in n8)
def test_fetch_inside(self):
width = 20
height = 10
resolution = 200
pi = 50
row = math.floor(pi / width)
n4 = mtlib.get_4_neighbors(width, height, resolution, pi, row)
n8 = mtlib.get_8_neighbors(width, height, resolution, pi, row)
self.assertEqual(4, len(n4))
self.assertTrue(49 in n4)
self.assertTrue(51 in n4)
self.assertTrue(30 in n4)
self.assertTrue(70 in n4)
self.assertEqual(8, len(n8))
self.assertTrue(71 in n8)
self.assertTrue(69 in n8)
self.assertTrue(29 in n8)
self.assertTrue(31 in n8)
self.assertTrue(all(pi in n8 for pi in n4))
def test_fetch_empty_image(self):
with self.assertRaises(ZeroDivisionError):
mtlib.get_4_neighbors(0, 0, 0, 0, 0)
with self.assertRaises(ZeroDivisionError):
mtlib.get_8_neighbors(0, 0, 0, 0, 0)