def test_init_when_size_is_greater_than_zero(self):
stack_in_arr = s.StackInArray(5)
self.assertEqual(len(stack_in_arr.arr), 5)
self.assertEqual(stack_in_arr.top, -1)
self.assertEqual(stack_in_arr.size, 5)
def test_case_when_not_full_multiple(self):
stack_in_arr = s.StackInArray(10)
stack_in_arr.push(10)
stack_in_arr.push(5)
self.assertEqual(stack_in_arr.arr[0], 10)
self.assertEqual(stack_in_arr.arr[1], 5)
def test_case_when_not_empty(self):
stack_in_arr = s.StackInArray(5)
stack_in_arr.push(5)
stack_in_arr.push(4)
stack_in_arr.push(3)
stack_in_arr.push(2)
self.assertEqual(stack_in_arr.pop(), 2)
def test_case_when_full(self):
stack_in_arr = s.StackInArray(5)
stack_in_arr.push(5)
stack_in_arr.push(4)
stack_in_arr.push(3)
stack_in_arr.push(2)
stack_in_arr.push(1)
with self.assertRaises(IndexError):
stack_in_arr.push(0)
def test_case_when_empty(self):
stack_in_arr = s.StackInArray(5)
with self.assertRaises(LookupError):
stack_in_arr.pop()