Mocking imported class in Python
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I am trying to mock a class which is called in a module which imports said class, which I want to test.
# application.py
from my_module.my_submodule import MyClass
def my_function(var1):
instance = MyClass()
instance.some_function(var1)
and my testing file
# test_application.py
import mock
import application
def test_my_function():
with mock.patch('my_module.my_submodule.MyClass') as MockClass:
application.my_function(var1)
MockClass.assert_called()
This gives an error saying MockClass was not called.
Now, by looking at this question: Why python mock patch doesn't work?, I was inspired to change the application.py import to this
# application.py
import my_module.my_submodule as mysub
def my_function(var1):
instance = mysub.MyClass()
instance.some_function(var1)
that is, I don't directly import the class that I want to mock in the test. Now it works.
My question is, if this is working as intended, or I am doing something wrong in the original way? Is it really necessary to always import modules like this, if I want to mock a class used in a module I want to test?
python testing
asked Nov 22 '18 at 14:35
Kaspar HKaspar H
276
add a comment |
I am trying to mock a class which is called in a module which imports said class, which I want to test.
# application.py
from my_module.my_submodule import MyClass
def my_function(var1):
instance = MyClass()
instance.some_function(var1)
and my testing file
# test_application.py
import mock
import application
def test_my_function():
with mock.patch('my_module.my_submodule.MyClass') as MockClass:
application.my_function(var1)
MockClass.assert_called()
This gives an error saying MockClass was not called.
Now, by looking at this question: Why python mock patch doesn't work?, I was inspired to change the application.py import to this
# application.py
import my_module.my_submodule as mysub
def my_function(var1):
instance = mysub.MyClass()
instance.some_function(var1)
that is, I don't directly import the class that I want to mock in the test. Now it works.
My question is, if this is working as intended, or I am doing something wrong in the original way? Is it really necessary to always import modules like this, if I want to mock a class used in a module I want to test?
python testing
asked Nov 22 '18 at 14:35
Kaspar HKaspar H
276
add a comment |
I am trying to mock a class which is called in a module which imports said class, which I want to test.
# application.py
from my_module.my_submodule import MyClass
def my_function(var1):
instance = MyClass()
instance.some_function(var1)
and my testing file
# test_application.py
import mock
import application
def test_my_function():
with mock.patch('my_module.my_submodule.MyClass') as MockClass:
application.my_function(var1)
MockClass.assert_called()
This gives an error saying MockClass was not called.
Now, by looking at this question: Why python mock patch doesn't work?, I was inspired to change the application.py import to this
# application.py
import my_module.my_submodule as mysub
def my_function(var1):
instance = mysub.MyClass()
instance.some_function(var1)
that is, I don't directly import the class that I want to mock in the test. Now it works.
My question is, if this is working as intended, or I am doing something wrong in the original way? Is it really necessary to always import modules like this, if I want to mock a class used in a module I want to test?
python testing
asked Nov 22 '18 at 14:35
Kaspar HKaspar H
276
I am trying to mock a class which is called in a module which imports said class, which I want to test.
# application.py
from my_module.my_submodule import MyClass
def my_function(var1):
instance = MyClass()
instance.some_function(var1)
and my testing file
# test_application.py
import mock
import application
def test_my_function():
with mock.patch('my_module.my_submodule.MyClass') as MockClass:
application.my_function(var1)
MockClass.assert_called()
This gives an error saying MockClass was not called.
Now, by looking at this question: Why python mock patch doesn't work?, I was inspired to change the application.py import to this
# application.py
import my_module.my_submodule as mysub
def my_function(var1):
instance = mysub.MyClass()
instance.some_function(var1)
that is, I don't directly import the class that I want to mock in the test. Now it works.
My question is, if this is working as intended, or I am doing something wrong in the original way? Is it really necessary to always import modules like this, if I want to mock a class used in a module I want to test?
python testing
python testing
asked Nov 22 '18 at 14:35
Kaspar HKaspar H
276
asked Nov 22 '18 at 14:35
Kaspar HKaspar H
276
asked Nov 22 '18 at 14:35
Kaspar HKaspar H
276
asked Nov 22 '18 at 14:35
Kaspar HKaspar H
276
asked Nov 22 '18 at 14:35
Kaspar HKaspar H
276
276
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
Yes it is working as intended, but you patched the wrong target.
Try patching application.MyClass.
application is not using my_module.my_submodule.MyClass anywhere,
but MyClass alias instead.
answered Nov 22 '18 at 15:52
progmaticoprogmatico
2,1491714
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Yes it is working as intended, but you patched the wrong target.
Try patching application.MyClass.
application is not using my_module.my_submodule.MyClass anywhere,
but MyClass alias instead.
answered Nov 22 '18 at 15:52
progmaticoprogmatico
2,1491714
add a comment |
Yes it is working as intended, but you patched the wrong target.
Try patching application.MyClass.
application is not using my_module.my_submodule.MyClass anywhere,
but MyClass alias instead.
answered Nov 22 '18 at 15:52
progmaticoprogmatico
2,1491714
add a comment |
Yes it is working as intended, but you patched the wrong target.
Try patching application.MyClass.
application is not using my_module.my_submodule.MyClass anywhere,
but MyClass alias instead.
answered Nov 22 '18 at 15:52
progmaticoprogmatico
2,1491714
Yes it is working as intended, but you patched the wrong target.
Try patching application.MyClass.
application is not using my_module.my_submodule.MyClass anywhere,
but MyClass alias instead.
answered Nov 22 '18 at 15:52
progmaticoprogmatico
2,1491714
answered Nov 22 '18 at 15:52
progmaticoprogmatico
2,1491714
answered Nov 22 '18 at 15:52
progmaticoprogmatico
2,1491714
answered Nov 22 '18 at 15:52
progmaticoprogmatico
2,1491714
2,1491714
add a comment |
add a comment |
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