def test_when_ll_is_not_empty(self):
e1 = s.Node(1)
e2 = s.Node(2)
e3 = s.Node(3)
stack = s.Stack()
stack.push(e1)
self.assertEqual(stack.head.value, 1)
self.assertEqual(stack.head.min, 1)
stack.push(e2)
self.assertEqual(stack.head.value, 2)
self.assertEqual(stack.head.min, 1)
stack.push(e3)
self.assertEqual(stack.head.value, 3)
self.assertEqual(stack.head.min, 1)
stack.pop()
self.assertEqual(stack.head.value, 2)
self.assertEqual(stack.head.min, 1)
stack.pop()
self.assertEqual(stack.head.value, 1)
self.assertEqual(stack.head.min, 1)
def test_when_linked_list_is_not_empty(self):
e1 = s.Node(5)
e2 = s.Node(3)
e3 = s.Node(4)
e4 = s.Node(2)
e5 = s.Node(1)
stack = s.Stack()
stack.push(e1)
self.assertEqual(stack.min(), 5)
stack.push(e2)
self.assertEqual(stack.min(), 3)
stack.push(e3)
self.assertEqual(stack.min(), 3)
stack.push(e4)
self.assertEqual(stack.min(), 2)
stack.push(e5)
self.assertEqual(stack.min(), 1)
def test_when_linked_list_is_not_empty(self):
stack = s.Stack()
e1 = s.Node(3)
e2 = s.Node(2)
e3 = s.Node(4)
e4 = s.Node(1)
stack.push(e1)
self.assertEqual(stack.head.value, 3)
self.assertEqual(stack.head.min, 3)
stack.push(e2)
self.assertEqual(stack.head.value, 2)
self.assertEqual(stack.head.min, 2)
stack.push(e3)
self.assertEqual(stack.head.value, 4)
self.assertEqual(stack.head.min, 2)
stack.push(e4)
self.assertEqual(stack.head.value, 1)
self.assertEqual(stack.head.min, 1)
def test_when_linked_list_is_empty(self):
stack = s.Stack()
e1 = s.Node(1)
stack.push(e1)
self.assertEqual(stack.head.value, 1)
self.assertEqual(stack.head.min, 1)
def test_when_linked_list_is_empty(self):
stack = s.Stack()
with self.assertRaises(ValueError):
stack.min()
def test_when_there_are_no_nodes_in_linked_list(self):
stack = s.Stack()
with self.assertRaises(ValueError):
stack.pop()
def test_when_data_type_of_arg_is_incorrect(self):
stack = s.Stack()
with self.assertRaises(TypeError):
stack.push(" ")