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A simple Python utility for extracting documentation snippets from tutorials.

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tuttest

Copyright (c) 2020 Antmicro

Tuttest is a utility package that simplifies tutorial and example testing. It provides an interface for extracting code snippets embedded in RST and Markdown files.

Features

  • get_snippets - function to extract snippets from a file. Calls parse_rst or parse_markdown underneath. Args:

    • filename - well, the filename
    • names - optional names to give to the extracted snippets, provided as list
    • extra_roles - Sphinx or other rst roles which the file might include, so that the parser does not die
    • parse - whether to parse the snippet, see below
  • parse_snippet - parse the snippet into a (prompt, command, result) sequence list. Useful for autoexecuting of docs.

Naming snippets externally

The names argument helps in the Pythonic use of tuttest - whenever you can't or don't want to change the documentation you want to test by naming snippets inside the docs, but you still want to keep some structure, you might want to sue this feature to name snippets extracted from a doc. An example below:

names = ['first_name', 'some_other_name', 'and_yet_another'] 
s = get_snippets('path/to/file.rst', names=names)
print(s['first_name'])
# prints the snippet text of the first snippet found in the file

Of course this way you will rely on the order of the snippets, but perhaps this is not a bad thing.

Getting Started

You can call tuttest directly by invoking the tuttest command from the console. This option might be useful for checking tutorials from, i.e., a Travis CI script. Here is a synopsis of a direct tuttest call:

  tuttest <file_name> [<snippet_name>] [--prefix-lines-with <prefix>] [--single-command]
  • <file_name> is a file in Markdown or RST from which you want to extract the code snippets.
  • <snippet_name> is the name that you provided for the snippet. Note that if you do not name a snippet, it will receive the unnamedX name, where X is the snippet number in the file (starting from 0). Examples of named snippets can be found below. You can execute multiple snippets at once, by separating their names with ,.
  • <prefix> is a command that is added to the snippet as a prefix.
  • --single-command if provided, all snippets from <snippet_name> (if specified) will be executed as a single command, separated with ;.

Examples

This example presents how to use tuttest for extracting named and unnamed code snippets from files. Both the Markdown and RST files used in this example contain the same code snippets. Therefore, the output produced by tuttest will be the same for both cases.

  • test.rst (RST format):
.. code-block:: bash

   echo "This is the first unnamed snippet"

.. code-block:: bash
   :name: bash-tutorial

   echo "This is a named snippet"
   printf "1 + 2 = %d\n" $((1+2))

.. code-block:: bash

   echo "This is the second unnamed snippet"
  • test.md (Markdown format*)
` ``
echo "This is the first unnamed snippet"
` ``

<!-- name="bash-tutorial" -->
` ``
echo "This is a named snippet"
printf "1 + 2 = %d\n" $((1+2))
` ``

` ``
echo "This is the second unnamed snippet"
` ``

* Note that you have to change the ` `` used in the script to ``` before the first script usage.

Here are tuttest usage examples. For clarity, these examples are run based on the above RST test document:

  • tuttest test/test.rst:
echo "This is the first unnamed snippet"

echo "This is a named snippet"
printf "1 + 2 = %d\n" $((1+2))

echo "This is the second unnamed snippet"
  • tuttest test/test.rst bash-tutorial:
echo "This is a named snippet"
printf "1 + 2 = %d\n" $((1+2))
  • tuttest test/test.rst unnamed2:
echo "This is the second unnamed snippet"
  • tuttest test/test.rst unnamed2 --prefix-lines-with "docker exec -t test bash -c"
docker exec -t test bash -c 'echo "This is the second unnamed snippet";'
  • tuttest test/test.rst bash-tutorial,unnamed2 --prefix-lines-with "docker exec -t test bash -c" --single-command
docker exec -t test bash -c 'echo "This is a named snippet";printf "1 + 2 = %d\n" $((1+2));echo "This is the second unnamed snippet";'

A basic tuttest usage in the script might be the following:

tuttest test.rst bash-tutorial | bash -

License

Apache 2.0

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