Over a million developers have joined DZone.
{{announcement.body}}
{{announcement.title}}

Introducing unittest-xml: testing XML in python

DZone's Guide to

Introducing unittest-xml: testing XML in python

· Web Dev Zone ·
Free Resource

Deploying code to production can be filled with uncertainty. Reduce the risks, and deploy earlier and more often. Download this free guide to learn more. Brought to you in partnership with Rollbar.

For some reason, I keep finding myself writing unit tests that need to make assertions about an XML document. To keep things DRY, I've packaged up my custom assertion methods as a PyPi module: unittest-xml. There's a small chance it may be useful to others.

Sample Usage

Enable the additional assert methods using a mixin:

import unittest
from xmltest import XMLAssertions


class SampleTestCase(unittest.TestCase, XMLAssertions):
    ...


Now suppose that the expected XML from some System Under Test (SUT) is:

<?xml version="1.0" encoding="UTF-8" ?>
<Response>
    <CardTxn>
        <authcode>060642</authcode>
        <card_scheme>Switch</card_scheme>
        <issuer country="UK">HSBC</issuer>
    </CardTxn>
    <reference>3000000088888888</reference>
    <merchantreference>1000001</merchantreference>
    <mode>LIVE</mode>
    <reason>ACCEPTED</reason>
    <status>1</status>
    <time>1071567305</time>
</Response>


then you can make assertions about the document using 3 additional assertions methods.

self.assertXPathNodeCount(RESPONSE, 1, 'CardTxn/authcode')
self.assertXPathNodeText(RESPONSE, 'LIVE', 'mode')
self.assertXPathNodeAttributes(RESPONSE, {'country': 'UK'}, 'CardTxn/issuer')


The first argument to each method is the XML string, the second is the expected value, while the third is the XPath query.

Installation

The standard way:

pip install unittest-xml


Discussion

Note, the implementation uses ElementTree and so only a subset of the XPath specification is implemented. However the above three assertion methods are sufficient for most scenarios.

The code is on Github, as usual.



Source: http://codeinthehole.com/writing/introducing-unittest-xml-testing-xml-in-python/

Deploying code to production can be filled with uncertainty. Reduce the risks, and deploy earlier and more often. Download this free guide to learn more. Brought to you in partnership with Rollbar.

Topics:

Opinions expressed by DZone contributors are their own.

{{ parent.title || parent.header.title}}

{{ parent.tldr }}

{{ parent.urlSource.name }}