On Tue, Mar 25, 2014 at 12:30 PM, Nitin Kumar <nitin.n...@gmail.com> wrote:
> Hi All,
>
> I am try to write test case with mocking original libraries.
> But we have scenario that some time we need this mock but some time we need
> to create object of original class so that test run on real scenario.
>
> Is there a way we can play with mock library or any other way that some
> time same test case runs with mock and some time with original objects?
>
> Right now we are writing 2 testcases one using mock and one with original
> class object.
>
>
You have not mentioned which is the mock module you are using.
If you are using 'Mock'[1], one way in which you can switch between
invoking real method and mock method is to use the 'patch' decoratror
provided by mock module as a context manager.
The below example illustrates the approach:
%cat sample.py
from mock import patch
import unittest
class Hello(object):
def process(self):
print 'I am real method'
return 200
class Secondary(object):
def __init__(self, r):
self.requester = r
def manage(self):
return self.requester.process()
class TestSecondary(unittest.TestCase):
def test_manage_withmock(self):
h = Hello()
s = Secondary(h)
with patch.object(Hello, 'process', return_value= 100) as
mock_method:
print s.manage()
print s.manage()
if __name__ == '__main__':
unittest.main()
%python sample.py
100
I am real method
200
The above approach is explained in the Mock quick guide [1].
1. http://www.voidspace.org.uk/python/mock/index.html
HTH,
sateesh
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