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Code Quality Rank: L2
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Programming language: Python
License: BSD 3-clause "New" or "Revised" License
Tags: Language    

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README

Introduction

A test suite for the Haskell library language-python (a parser for Python 2 and 3).

License

language-python-test is released as open source software under the terms of the 3 clause BSD License. See the file LICENCE.txt in the source code repository of language-python-test.

This package also contains files from the CPython test suite. Those files are found in the sub-directories test/CPython_test_suite_v2 and test/CPython_test_suite_v3. The license for those files is contained in those directories.

Installation

Install into a cabal sandbox:

git clone https://github.com/bjpop/language-python-test/
cd language-python-test
cabal sandbox init
cabal install language-python-test
# perhaps copy the executables from language_python_test/.cabal-sandbox/bin to ~/.cabal/bin/
# and run cabal sandbox delete to remove the sandbox files

Usage

The package builds the following executable programs:

  • language-python-parse-pretty
  • language-python-roundtrip
  • language-python-tokens

The first program parses a Python file as input and pretty prints it back again.

The second program performs a round-trip of parse, pretty print, parse and pretty print. It checks that the first pretty print is equal to the second pretty print. This is not a perfect test for correctness, but it does check that the parser and pretty printer agree to some extent, and is usually quite good at finding errors.

The third program performs lexical analysis on the input Python file and pretty prints the resulting token stream.

The test suite (which tests the behaviour of language-python) uses the shelltest tool. To run the tests you need to have shelltest installed:

cabal install shelltestrunner

The tests are found in the sub-directory called tests.

You can run the tests like so from the top directory of the language-python-test package:

shelltest --color --execdir test/ -- -j1

If you have installed into a cabal sandbox, then you might need to adjust your path:

PATH=.cabal-sandbox/bin/:$PATH shelltest --color --execdir test/ -- -j1 

We provide a Makefile for convenience which does the same thing. You can run it like so:

make test

or, with PATH adjustment:

PATH=.cabal-sandbox/bin/:$PATH make test 


*Note that all licence references and agreements mentioned in the language-python-test README section above are relevant to that project's source code only.