def test_next(): l = Slist() l.prepend("Bob") l.prepend("Amy") l.prepend("Carol") assert l.head.key == "Carol" head_next = l.head.next assert head_next.key == "Amy" last = head_next.next assert last.key == "Bob"
def test_delete_next_reassignment(): l = Slist() l.prepend("Bob") l.prepend("Dave") l.prepend("Amy") l.prepend("Carol") l.delete("Amy") l.delete("Dave") assert l.head.next.key == "Bob"
def test_delete(): l = Slist() l.prepend("Bob") l.prepend("Amy") l.prepend("Carol") l.delete("Carol") assert l.head.key == "Amy" l.delete("Bob") assert l.head.next is None l = Slist() l.prepend("Bob") l.prepend("Amy") l.prepend("Carol") with pytest.raises(ValueError): l.delete("Edgar") l = Slist() with pytest.raises(ValueError): l.delete("Edgar")
def test_search(): l = Slist() l.prepend("Bob") l.prepend("Amy") l.prepend("Carol") found = l.contains("Bob") assert found is True found = l.contains("Amy") assert found is True found = l.contains("Bob") assert found is True l = Slist() l.prepend("Bob") l.prepend("Amy") found = l.contains("Bob") assert found is True found = l.contains("Dave") assert found is False
def test_prepend(): l = Slist() l.prepend("Bob") assert l.head.key == "Bob" assert l.head.next is None