def test_stack_loading(self):
stack = Stack()
stack.push(*[x for x in range(1, 101)])
self.assertEqual(stack.length, 100)
self.assertEqual(stack.pull(), 100)
def test_empty_stack_error(self):
stack = Stack()
with self.assertRaises(StackEmptyError):
stack.pull()
def test_stack_length(self):
stack = Stack()
stack.push(6)
self.assertEqual(stack.length, 1)
def test_push(self):
stack = Stack()
stack.push(77)
self.assertEqual(stack.peek(), 77)
def test_pull(self):
stack = Stack(*[x for x in range(1, 6)])
old_length = stack.length
self.assertEqual(stack.pull(), 5)
self.assertLess(stack.length, old_length)
def test_peek(self):
stack = Stack()
stack.push(35)
self.assertEqual(stack.peek(), 35)
def test_clear(self):
stack = Stack(*[x for x in range(1, 6)])
self.assertEqual(stack.length, 5)
stack.clear()
self.assertEqual(stack.length, 0)