using hamcrest with pyDoubles and kwargs

Tyler Rush

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Jan 17, 2012, 2:04:27 PM1/17/12

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pyDoubles version: 1.6

python version: 2.7

hamcrest version: 1.6

Hi,

Does pyDoubles support the use of hamcrest matchers for keyword arguments when writing expectaions for a Mock object? Hamcrest works great for plain args, but I can't figure out how/if it works with kwargs. If I had to guess, after looking at pyDoubles.core for a little while, it seems there is not matching for kwargs like there is for normal args: _MethodPool_._do_kwargs_match() doesn't seem to make use of self.match_finder like _MathodPool_._do_args_match() does. Could you confirm/deny this?

Below is the code I used to tryout hamcrest matchers in kwargs... but with no success. Thanks for the help.

from hamcrest import equal_to, is_

import unittest

from pyDoubles.framework import *

class ClassToMock():

def __init__(self):

pass

def func(self, anumber, akw1="nothing", akw2="something"):

print anumber, akw1, akw2

class SimpleTestCase(unittest.TestCase):

def setUp(self):

self.classmock = mock(ClassToMock())

def tearDown(self):

self.classmock.assert_that_is_satisfied()

def test_a_simple_test(self):

""" works fine """

expect_call(self.classmock.func).with_args(4, akw2="four")

expect_call(self.classmock.func).with_args(5, akw2="five")

self.classmock.func(4, akw2="four")

self.classmock.func(5, akw2="five")

def test_an_args_matcher(self):

""" works fine """

expect_call(self.classmock.func).with_args(equal_to(4), akw2="four")

expected_args = [equal_to(5)]

expect_call(self.classmock.func).with_args(*expected_args, akw2="five")

self.classmock.func(4, akw2="four")

self.classmock.func(5, akw2="five")

def test_a_kwarg_test1(self):

""" DOESN'T WORK """

expect_call(self.classmock.func).with_args(4, akw2=equal_to("four"))

self.classmock.func(4, akw2="four")

def test_a_kwarg_test2(self):

""" DOESN'T WORK """

kwargs = {'akw2' : equal_to("four")}

expect_call(self.classmock.func).with_args(4, **kwargs)

self.classmock.func(4, akw2="four")

def test_a_kwarg_test3(self):

""" DOESN'T WORK """

kwargs = equal_to({'akw2' : "four"})

expect_call(self.classmock.func).with_args(4, **kwargs)

self.classmock.func(4, akw2="four")

if __name__ == "__main__":

unittest.main()

~ Tyler

Miguel Angel

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Jan 18, 2012, 3:40:28 PM1/18/12

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Hi there.

I'm a little busy nowadays. I promise to try what you say as soon as possible if nobody does.

Perhaps a little refactoring I made in last commits is the responsible of the fail. But it only implies that tests were not enough :D

I hope to send more feedback in a couple of days.

See you!

--
Miguel Ángel García Martínez

http://www.magmax.org

Mail | Twitter | LinkedIn | about.me

Carlos Ble

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Jan 18, 2012, 4:06:33 PM1/18/12

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Hi Tyler!
Thanks for using pyDoubles :-)

You are right, that feature is not implemented. I didn't implement it because I didn't need it. I try to not user kwargs too much. However,
it is a great feature for the next version :-) I can't tell you when will I implement it, although you can try it yourself. Your changes will be accepted to the main repository if you develop them with TDD.

If you can blog about pyDoubles or publish anything about the framework that would be appreciated :-)

Cheers!

2012/1/17 Tyler Rush <m...@tylerlogic.com>

--
Carlos Ble