def test_1_node_list():
node = Node(0)
assert detect_cycle(node) == False
def test_2_node_list_with_no_cycle():
node6 = Node(6)
node7 = Node(7, node6)
assert detect_cycle(node7) == False
def test_5_node_list_input_with_cycle():
node1.successor = node5
assert detect_cycle(node5) == True
def test_2_node_list_with_cycle():
node1.successor = node2
assert detect_cycle(node2) == True
def test_5_node_list_input_with_no_cycle():
assert detect_cycle(node5) == False