Testing ``nbtoolbelt``
======================

``nbtoolbelt`` comes with automated test cases using ``pytest`` and ``pytest-mock``.

For the purpose of testing,
the command-line script ``nbtb`` has a *hidden command* ``base``.
This command invokes the base class ``Tool`` (also see :doc:`extension`),
which copies notebooks:

* notebook ``nb.ipynb`` is copied to ``nb-copy.ipynb``

.. code-block:: bash

  $ nbtb base test.ipynb
  Copying: test.ipynb

Test cases for concrete tools need not test functionality of the base class.