O'Reilly Pytest Class

Pytest Intro Assignments.rst

Pytest Introduction

Copyright 2019 - Matt Harrison

@__mharrison__

• D - Decide
• R - Relax
• M - Motivation
• O - Observe
• M - Mechanics

Assignment 1

• Install pytest in a virtual environment

• Run:

  pytest -h
  

Assignment 2

• Create a directory/module Integer/integr.py (note spelling).
  • Create a function, parse, that accepts a string of the form "1,3,5,9" that returns a list of integers ([1, 3, 5, 9])
• Create a test directory and test file Integer/test/test_integr.py
  • Create a test function, test_basic that asserts that integr.parse works with the input "1,3,5,9"
• Run pytest on test/test_integr.py

Assignment 3

• Create a test function, test_bad1 that asserts that an error is raised when integr.parse is called with 'bad input'. Use a context manager (with)
• Create a test function, test_bad2 that asserts that an error is raised when integr.parse is called with '1-3,12-15'. Use the @pytest.mark.xfail decorator.

Assignment 4

• Add a __name__ check that will run pytest on test/test_integr.py if it is executed with python
• Run the command line option to collect the tests (but not execute them).
• Run only the test_basic test from the command line.

Assignment 5

• Create a doctest on the integr.py module that shows an example of running the parse function.
• Run the doctest via pytest with a command line option
• Create a pytest.ini file. Add an option to the configuration file to run the doctests when pytest is invoked
• Run the doctest via pytest without a command line option

Assignment 6

• Run the tests that have bad in the name
• Mark test_bad1 and test_bad2 with the wrong name.
• Run only tests that are marked with wrong.
• Run pytest with --strict
• Register bad as a marker in pytest.ini
• Run pytest with --strict

Thanks for this Matt