def test_existing(self):
self.assertEqual(binary_search(5, self.arr),
5,
msg="Invalid index returned!")
self.assertEqual(binary_search(54, self.arr),
54,
msg="Invalid index returned!")
def test_borders(self):
self.assertEqual(
binary_search(0, self.arr),
0,
msg="First element is not found - maybe 'mid - 1' is missing?")
self.assertEqual(
binary_search(101, self.arr),
100,
msg="Last element is not found - maybe 'mid + 1' is missing?")
def test_missing(self):
self.assertIsNone(
binary_search(-1, self.arr),
msg=
"Answer should be None because element is not presented in the array"
)
self.assertIsNone(
binary_search(100, self.arr),
msg=
"Answer should be None because element is not presented in the array"
)
def test_existing(self):
self.assertEqual(5,
binary_search(5, self.arr),
msg="Invalid index returned!")
self.assertEqual(54,
binary_search(54, self.arr),
msg="Invalid index returned!")
self.assertEqual(
1,
binary_search(2, [1, 2, 2, 2]),
msg="You should return first occurrence from the array.")
self.assertEqual(
0,
binary_search(2, [2, 2, 2, 2]),
msg="You should return first occurrence from the array.")