Pytest - starting example

For 2023 - we are now fully retired from IT training.
We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk.

Lisa and I (Graham) now live in what was our training centre in Melksham - happy to meet with former delegates here - but do check ahead before coming round. We are far from inactive - rather, enjoying the times that we are retired but still healthy enough in mind and body to be active!

I am also active in many other area and still look after a lot of web sites - you can find an index ((here))

"pytest is a mature full-featured Python testing tool that helps you write better programs" ... and being fully featured, there's something of a hurdle for newcomers in finding which falities they need from the wide range. To help a newcomer today, we took a short look at some first Pytest examples .. and I've now loaded those onto our website for your (and my later) reference.

Firstly - "Hello testing world" defines a function to be tested:

  def add(this,that):

            result = this + that

            return result

and a test for that function:

  def test_add():

            assert add(10,15) == 25

and when I run that, the test is discovered and run - and it passes:

  WomanWithCat:pt grahamellis$ python -m pytest test_hello.py 

  ========================== test session starts ==========================

  platform darwin -- Python 2.7.5, pytest-2.8.5, py-1.4.31, pluggy-0.3.1

  rootdir: /Users/grahamellis/jan16/cyan/pt, inifile: setup.cfg

  collected 1 items 

  

  test_hello.py .

  

  ======================= 1 passed in 0.00 seconds ========================

  WomanWithCat:pt grahamellis$

At this early stage, before we have added a configuration file, any methods starting test_ will be run as part of the test suite. The complete example is available [here]
(written 2016-01-07, updated 2016-01-08)

Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles

Y212 - Python - Code testing, patterns, profiles and optimisation.
  [235] Preparation for a day's work - (2005-03-04)
  [1140] Python GTK - Widget, Packing, Event and Feedback example - (2007-04-09)
  [1146] __new__ v __init__ - python constructor alternatives? - (2007-04-14)
  [1148] Python decorators - wrapping a method call in extra code - (2007-04-15)
  [1555] Advanced Python, Perl, PHP and Tcl training courses / classes - (2008-02-25)
  [2123] Using Python with OpenOffice - (2009-04-09)
  [2616] Defining a static method - Java, Python and Ruby - (2010-02-01)
  [3441] Pressing ^C in a Python program. Also Progress Bar. - (2011-09-15)
  [3442] A demonstration of how many Python facilities work together - (2011-09-16)
  [3464] Passing optional and named parameters to python methods - (2011-10-04)
  [3478] Testing your Python classes with the unittest package - how to - (2011-10-14)
  [3658] Using Make for a distribution - (2012-03-17)
  [4090] Test Driven Development in Python - Customer Comes First - (2013-05-16)
  [4326] Learning to program - comments, documentation and test code - (2014-11-22)
  [4344] Python base and inherited classes, test harness and unit testing - new examples - (2014-12-07)
  [4446] Combining tests into suites, and suites into bigger suites - Python and unittest - (2015-03-01)
  [4470] Testing in Python 3 - unittest, doctest and __name__ == __main__ too. - (2015-04-21)
  [4538] Flask and unittest - hello web app test world - (2015-10-15)
  [4540] Unittest of a Flask application including forms - (2015-10-15)
  [4542] The principle of mocking - and the Python Mock package - (2015-10-17)
  [4618] Pytest - second example beyond hello world - (2016-01-08)
  [4716] Profiling your Python program - (2016-11-01)

Back to
Still teaching Tcl in 2016?

Previous and next
or
Horse's mouth home

Forward to
Pytest - second example beyond hello world

Some other Articles

The power of scripting
Perl 6 - a Practical Extraction and Reporting example!
Buses - not about the buses, but about the people who use the buses
Pytest - starting example
Still teaching Tcl in 2016?
Questions for First (West of England)
PC Plod - alive and scaremongering in Wiltshire?
Our best hotel customers help us ... to help them ... be our best customers.
TransWilts - robust these days - no longer the first service to be cancelled

4759 posts, page by page

Link to page ... 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96 at 50 posts per page

This is a page archived from The Horse's Mouth at http://www.wellho.net/horse/ - the diary and writings of Graham Ellis. Every attempt was made to provide current information at the time the page was written, but things do move forward in our business - new software releases, price changes, new techniques. Please check back via our main site for current courses, prices, versions, etc - any mention of a price in "The Horse's Mouth" cannot be taken as an offer to supply at that price.

Link to Ezine home page (for reading).
Link to Blogging home page (to add comments).

You can Add a comment or ranking to this page

Like this? ??