I’m trying to mock a singluar method from the boto3 s3 client object to throw an exception. But I need all other methods for this class to work as normal.
This is so I can test a singular Exception test when and error occurs performing a upload_part_copy
1st Attempt
import boto3
from mock import patch
with patch(‘botocore.client.S3.upload_part_co….
How do you mock a readonly property with mock?
I tried:
setattr(obj.__class__, ‘property_to_be_mocked’, mock.Mock())
but the issue is that it then applies to all instances of the class… which breaks my tests.
Do you have any other idea? I don’t want to mock the full object, only this specific property.
….
Is it possible to mock a return value of a function called within another function I am trying to test? I would like the mocked method (which will be called in many methods I’m testing) to returned my specified variables each time it is called. For example:
class Foo:
def method_1():
results = uses_some_other_method()
def method_n(….
I have a function (foo) which calls another function (bar). If invoking bar() raises an HttpError, I want to handle it specially if the status code is 404, otherwise re-raise.
I am trying to write some unit tests around this foo function, mocking out the call to bar(). Unfortunately, I am unable to get the mocked call to bar() to raise an Exceptio….
I am using mock with Python and was wondering which of those two approaches is better (read: more pythonic).
Method one: Just create a mock object and use that. The code looks like:
def test_one (self):
mock = Mock()
mock.method.return_value = True
self.sut.something(mock) # This should called mock.method and checks the result.
….
I’m using the Mock library to test my application, but I want to assert that some function was not called. Mock docs talk about methods like mock.assert_called_with and mock.assert_called_once_with, but I didn’t find anything like mock.assert_not_called or something related to verify mock was NOT called.
I could go with something like the followin….
Module A includes import B at its top. However under test conditions I’d like to mock B in A (mock A.B) and completely refrain from importing B.
In fact, B isn’t installed in the test environment on purpose.
A is the unit under test. I have to import A with all its functionality. B is the module I need to mock. But how can I mock B within A and s….
Can anyone tell me why this isn’t working?
>>> import mock
>>> @mock.patch(‘datetime.date.today’)
… def today(cls):
… return date(2010, 1, 1)
…
>>> from datetime import date
>>> date.today()
datetime.date(2010, 12, 19)
Perhaps someone could suggest a better way?
….
We have been using Mock for python for a while.
Now, we have a situation in which we want to mock a function
def foo(self, my_param):
#do something here, assign something to my_result
return my_result
Normally, the way to mock this would be (assuming foo being part of an object)
self.foo = MagicMock(return_value=”mocked!”)
Even, if i ca….
Mock has a helpful assert_called_with() method. However, as far as I understand this only checks the last call to a method.
If I have code that calls the mocked method 3 times successively, each time with different parameters, how can I assert these 3 calls with their specific parameters?
….