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Pytest - starting example

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


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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.

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