Duncan Booth wrote:
Qiangning Hong wrote:
As you see, it is an OO wrapper on _extmod, which is a pyrex extension
module. The question is: how to unittest this class? As the _extmod
is hardware-dependent, I want to use a mock class to replace it in unit
test. But how can I let myclass in unittest to import the mock class?
Like the following:
Given:
>> # file: myclass.py
>> import _extmod
>> class MyClass(object):
>> def __init__(self):
>> self.handle = _extmod.open()
>> ...
One other way to do your unit test stuff is:
# file: test_myclass.py
import sys, bogus_extmod # First, get the fake hardware
sys.modules['_extmod'] = bogus_extmod # then make that active
import myclass, unittest # and now do all you normally would do
...
class SimplestTests(unittest.TestCase):
...
Note that the "module switch" must happen very early (probably at
the top of the main program).
--Scott David Daniels
[EMAIL PROTECTED]
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