unittest2 with plugins, the succesor to nose
Project description
Welcome to nose2
nose2 is the successor to nose.
It’s unittest with plugins.
nose2 is a new project and does not support all of the features of nose. See differences for a thorough rundown.
nose2’s purpose is to extend unittest to make testing nicer and easier to understand.
nose2 vs pytest
nose2 may or may not be a good fit for your project.
If you are new to python testing, we encourage you to also consider pytest, a popular testing framework.
Quickstart
Because nose2 is based on unittest, you can start from the Python Standard Library’s documentation for unittest and then use nose2 to add value on top of that.
nose2 looks for tests in python files whose names start with test and runs every test function it discovers.
Here’s an example of a simple test, written in typical unittest style:
# in test_simple.py
import unittest
class TestStrings(unittest.TestCase):
def test_upper(self):
self.assertEqual("spam".upper(), "SPAM")You can then run this test like so:
$ nose2 -v test_upper (test_simple.TestStrings) ... ok ---------------------------------------------------------------------- Ran 1 test in 0.000s OK
However, nose2 supports more testing configuration and provides more tools than unittest on its own.
For example, this test exercises just a few of nose2’s features:
# in test_fancy.py
from nose2.tools import params
@params("Sir Bedevere", "Miss Islington", "Duck")
def test_is_knight(value):
assert value.startswith('Sir')and then run this like so:
$ nose2 -v --pretty-assert
test_fancy.test_is_knight:1
'Sir Bedevere' ... ok
test_fancy.test_is_knight:2
'Miss Islington' ... FAIL
test_fancy.test_is_knight:3
'Duck' ... FAIL
======================================================================
FAIL: test_fancy.test_is_knight:2
'Miss Islington'
----------------------------------------------------------------------
Traceback (most recent call last):
File "/mnt/ebs/home/sirosen/tmp/test_fancy.py", line 6, in test_is_knight
assert value.startswith('Sir')
AssertionError
>>> assert value.startswith('Sir')
values:
value = 'Miss Islington'
value.startswith = <built-in method startswith of str object at 0x7f3c3172f430>
======================================================================
FAIL: test_fancy.test_is_knight:3
'Duck'
----------------------------------------------------------------------
Traceback (most recent call last):
File "/mnt/ebs/home/sirosen/tmp/test_fancy.py", line 6, in test_is_knight
assert value.startswith('Sir')
AssertionError
>>> assert value.startswith('Sir')
values:
value = 'Duck'
value.startswith = <built-in method startswith of str object at 0x7f3c3172d490>
----------------------------------------------------------------------
Ran 3 tests in 0.001s
FAILED (failures=2)
Full Docs
Full documentation for nose2 is available at docs.nose2.io
Contributing
If you want to make contributions, please read the contributing guide.
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