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Manipulates JUnit/xUnit Result XML files

Project description

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What does it do?

junitparser is a JUnit/xUnit Result XML Parser. Use it to parse and manipulate existing Result XML files, or create new JUnit/xUnit result XMLs from scratch.

There are already a lot of modules that converts JUnit/xUnit XML from a specific format, but you may run into some proprietory or less-known formats and you want to convert them and feed the result to another tool, or, you may want to manipulate the results in your own way. This is where junitparser come into handy.

Why junitparser?

  • Functionality. There are various JUnit/xUnit XML libraries, some does parsing, some does XML generation, some does manipulation. This module does all in a single package.
  • Extensibility. JUnit/xUnit is hardly a standardized format. The base format is somewhat universally agreed with, but beyond that, there could be “custom” elements and attributes. junitparser aims to support them all, by allowing the user to monkeypatch and subclass some base classes.
  • Pythonic. You can manipulate test cases and suites in a pythonic way.

Installation

pip install junitparser

Usage

You should be relatively familiar with the Junit XML format. If not, run pydoc on the exposed classes and functions to see how it’s structured.

Create Junit XML format reports from scratch

You have some test result data, and you want to convert them into junit.xml format.

from junitparser import TestCase, TestSuite, JUnitXml, Skipped, Error

# Create cases
case1 = TestCase('case1')
case1.result = Skipped()
case2 = TestCase('case2')
case2.result = Error('Example error message', 'the_error_type')

# Create suite and add cases
suite = TestSuite('suite1')
suite.add_property('build', '55')
suite.add_testcase(case1)
suite.add_testcase(case2)
suite.remove_testcase(case2)

# Add suite to JunitXml
xml = JUnitXml()
xml.add_testsuite(suite)
xml.write('junit.xml')

Read and manipulate exiting JUnit/xUnit XML files

You have some existing junit.xml files, and you want to modify the content.

from junitparser import JUnitXml

xml = JUnitXml.fromfile('/path/to/junit.xml')
for suite in xml:
    # handle suites
    for case in suite:
        # handle cases
xml.write() # Writes back to file

Merge XML files

You have two or more XML files, and you want to merge them into one.

from junitparser import JUnitXml

xml1 = JUnitXml.fromfile('/path/to/junit1.xml')
xml2 = JUnitXml.fromfile('/path/to/junit2.xml')

newxml = xml1 + xml2
# Alternatively, merge in place
xml1 += xml2

Note that it won’t check for duplicate entries. You need to deal with them on your own.

Create XML with custom attributes

You want to use an attribute that is not supported by default.

from junitparser import TestCase, Attr, IntAttr, FloatAttr

# Add the custom attribute
TestCase.id = IntAttr('id')
TestCase.rate = FloatAttr('rate')
TestCase.custom = Attr('custom')
case = TestCase()
case.id = 123
case.rate = 0.95
case.custom = 'foobar'

Handling XML with custom element

There may be once in 1000 years you want to it this way, but anyways. Suppose you want to add element CustomElement to TestCase.

from junitparser import Element, Attr, TestSuite

# Create the new element by subclassing Element,
# and add custom attributes to it.
class CustomElement(Element):
    _tag = 'custom'
    foo = Attr()
    bar = Attr()

testcase = TestCase()
custom = CustomElement()
testcase.append(custom)
# To find a single sub-element:
testcase.child(CustomElement)
# To iterate over custom elements:
for custom in testcase.iterchildren(CustomElement):
    ... # Do things with custom element

Handling custom XML attributes

Say you have some data stored in the XML as custom attributes and you want to read them out:

from junitparser import Element, Attr, TestSuite

# Create the new element by subclassing Element or one of its child class,
# and add custom attributes to it.
class MyTestCase(TestCase):
    foo = Attr()

xml = JUnitXml.fromfile('/path/to/junit.xml')
for suite in xml:
    # handle suites
    for case in suite:
        my_case = MyTestCase.fromelem(case)
        print(my_case.foo)

Command Line

$ junitparser --help
usage: junitparser [-h] [-v] {merge} ...

Junitparser CLI helper.

positional arguments:
{merge}        command
  merge        Merge Junit XML format reports with junitparser.

optional arguments:
-h, --help     show this help message and exit
-v, --version  show program's version number and exit
$ junitparser merge --help
usage: junitparser merge [-h] paths [paths ...] output

positional arguments:
paths       Original XML path(s).
output      Merged XML Path.

optional arguments:
-h, --help  show this help message and exit

Test

You can run the cases directly:

python test.py

Or use pytest:

pytest test.py

Notes

There are some other packages providing similar functionalities. They are out there for a longer time, but might not be as feature-rich or fun as junitparser:

  • xunitparser: Read JUnit/XUnit XML files and map them to Python objects
  • xunitgen: Generate xUnit.xml files
  • xunitmerge: Utility for merging multiple XUnit xml reports into a single xml report.
  • junit-xml: Creates JUnit XML test result documents that can be read by tools such as Jenkins

Contribute

Please do!

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