def test_push_and_pop(self):
sut = LinkedList([1, 2])
sut.push(3)
self.assertEqual(len(sut), 3)
self.assertEqual(sut.pop(), 3)
self.assertEqual(sut.pop(), 2)
self.assertEqual(sut.pop(), 1)
self.assertEqual(len(sut), 0)
sut.push(4)
self.assertEqual(len(sut), 1)
self.assertEqual(sut.head().value(), 4)
def test_push_and_pop(self):
sut = LinkedList([1, 2])
sut.push(3)
self.assertEqual(len(sut), 3)
self.assertEqual(sut.pop(), 3)
self.assertEqual(sut.pop(), 2)
self.assertEqual(sut.pop(), 1)
self.assertEqual(len(sut), 0)
sut.push(4)
self.assertEqual(len(sut), 1)
self.assertEqual(sut.head().value(), 4)
def main():
linked_list = LinkedList(['foo', 'bar'])
print(list(linked_list))
linked_list.push('baz')
print(list(linked_list))
for node in linked_list:
print(f'node: {node}')
print(list(linked_list.reversed()))
def test_pushing_to_empty_list_changes_head(self):
sut = LinkedList()
sut.push(5)
self.assertEqual(len(sut), 1)
self.assertEqual(sut.head().value(), 5)
def test_can_push_to_non_empty_list(self):
sut = LinkedList([1, 2, 3])
sut.push(4)
self.assertEqual(len(sut), 4)
def test_pushing_to_empty_list_changes_head(self):
sut = LinkedList()
sut.push(5)
self.assertEqual(len(sut), 1)
self.assertEqual(sut.head().value(), 5)
def test_can_push_to_non_empty_list(self):
sut = LinkedList([1, 2, 3])
sut.push(4)
self.assertEqual(len(sut), 4)
