This would be nice if it had predefined routines to run through, preferably from a plaintext, line-separated textarea.

For example:

  insert value
  insert value
  insert value
  delete value
  insert value
  insert value
  find   value
  insert value

That way, if someone just wanted to see how the data structure worked, they could step through an existing routine. Others, who may want to validate their own routines match the expected output, can add and edit the routine parameters all at once.

You may want to prefill some fields because it may not be clear to everyone what value is expected in the input box.

Neat project. Thanks for sharing!