Python Testing

How not to test, part 1

Brian — Tue, 21 May 2013 14:14:49 +0000

or Complete coverage testing or More is Better testing Update 5/22/13: I’ve received several criticisms of this post. Most of them constructive. :) I’d like to take some time to re-read the post, re-read the feedback, and compose a more coherent statement about my thoughts on the matter. I agree with some points of my [...]

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pytest debug print logging in real time

Brian — Thu, 04 Apr 2013 02:23:18 +0000

There are many circumstances where it’s really great to display the output of a test while a test is running, and not wait until the end. In this post, I’m going to describe my method for getting around pytest’s output capture mechanism, so that I can see my debug print/logging statements in real time. Fast [...]

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regex search and replace example scripts

Brian — Fri, 08 Feb 2013 03:55:43 +0000

Search and replace is such a common task that it should be a tool that’s in every command line script author’s toolbox. There are probably endless solutions to the problem. I’ve put together my standard methods for tackling the problem. I’ll also show similar Perl versions, mainly for comparisons. use models using Python with a [...]

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Markdown.py passes first 3 tests

Brian — Sun, 03 Feb 2013 05:56:25 +0000

Just pushed up an update to markdown.py and test_markdown_pytest.py to github Passing first 3 tests now. Non-marked lines em tags strong tags Update: I posted this, then felt bad that it was so short, so removed it. However, a notification already had gone out on twitter and the rss feed. So I moved it back [...]

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nose introduction

Brian — Tue, 29 Jan 2013 15:51:12 +0000

This post has several examples, and covers fixtures, test discovery, asserts, running options, and running unittests and doctests. Nose’s tagline is “nose extends unittest to make testing easier”. It’s is a fairly well known python unit test framework, and can run doctests, unittests, and “no boilerplate” tests. It is a good candidate for a go-to [...]

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pytest introduction

Brian — Tue, 15 Jan 2013 13:36:34 +0000

I think of pytest as the run-anything, no boilerplate, no required api, use-this-unless-you-have-a-reason-not-to test framework. This is really where testing gets fun. As with previous intro’s on this site, I’ll run through an overview, then a simple example, then throw pytest at my markdown.py project. I’ll also cover fixtures, test discovery, and running unittests with [...]

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Confession … I still use perl on the command line

Brian — Wed, 09 Jan 2013 00:00:04 +0000

I have a confession to make. I still use Perl. Regularly. But mostly as a command line tool. Is that a reason? or an excuse? When I started using Python regularly, I tried to replace my Perl usage. Nothing against Perl, I just wanted to force myself to use Python to aid in my learning [...]

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unittest introduction

Brian — Fri, 04 Jan 2013 05:22:18 +0000

The unittest test framework is python’s xUnit style framework. It is a standard module that you already have if you’ve got python version 2.1 or greater. In this post, I’ll cover the basics of how to create and run a simple test using unittest. Then I’ll show how I’m using it to test markdown.py. Overview [...]

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tip: interactive python from cygwin when using windows python install

Brian — Mon, 17 Dec 2012 16:00:12 +0000

Remember to use the ‘-i’ flag when starting an interactive python session from cygwin if you’ve installed python with a windows installer. cygwin session (bad): > python | (... nothing ... perpetual annoying blinking cursor ... grrr) cygwin session (good): > python -i < -- version info deleted -- > >>> print 'ABJPGRSJWRPF' ABJPGRSJWRPF >>> [...]

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Poll Results: test frameworks

Brian — Fri, 14 Dec 2012 06:10:42 +0000

Well, the poll I put up a couple weeks ago has 125 votes last I checked. Results nose, 42 votes pytest, 32 votes unittest, 29 votes doctest, 18 votes other, 4 votes The other votes were: twisted trial (also mentioned in a comment) pyVows attest zope.testing Commentary This is mostly what I expected. So I [...]

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