All Questions
268
questions
1
vote
0
answers
23
views
mocking out imported objects in Python
Lets say there is a module headache that defines an object that is then imported and used by code I want to test:
# defined in headache/__init__.py
problem = Problem()
then it's imported by Foo:
# ...
- 792
1
vote
1
answer
24
views
Cannot mock the method in dependency module correctly in Python
Here is my project structure
|-- project
|-- util.py
|-- main.py
|-- tests
|-- test_main.py
In the main.py file I reference the function in util.py
from util import rename
def ...
- 15.4k
0
votes
0
answers
40
views
Why python testing always import the file in another module implicitly
Current I have two files in the same folder, in the source file I import the dlt module
# File: pipeline.py
import dlt
Another is a test file which import nothing from the source file yet:
import ...
- 15.4k
0
votes
0
answers
40
views
"AssertionError: Expected 'show' to have been called once" when trying to mock plt.show()
I am currently trying to design some tests to run with pytest for a GUI. The GUI has a button that plots a graph on click. I want to make sure the button does indeed generate a graph. At this stage, I ...
- 13
0
votes
1
answer
46
views
Mock patching an endpoint unittest that makes several requests to third party
I have a single endpoint written using django ninja. This endpoint executes a crawler that performs several requests. The sequence of requests has 3 different routines depending on whether or not the ...
- 111
0
votes
0
answers
42
views
Python unittest how to mock function which external function is defined in __init__.py
I would like to test my_func2 that is calling my_func1. I would like to mock my_func1, but I don't know how can I do it when my_func2 is imported in my_package.__init__.py. When I delete that import, ...
- 1
0
votes
0
answers
33
views
Mocking a dictionary upon FastAPI router instantiation
Attempting to write tests for an existing route and running into some roadblocks. I'm trying to mock a dictionary that is loaded when a router is instantiated, but it seems like the @patch'd versions ...
- 227
2
votes
1
answer
53
views
Simulate stdout in fake subprocess.Popen
I would like to test a function, which invokes subprocess.Popen and captures stdout. In particular, I need to test stdout content physically captured in a file on disc without ever calling the actual ...
- 428
2
votes
1
answer
78
views
Test that a function imported into different namespaces is never called
Suppose I have
foo.py
def my_func():
print('hello world!')
bar.py
from foo import my_func
I want to write tests to ensure that my_func is never called. I have this:
from unittest import mock
...
- 2,932
0
votes
1
answer
91
views
Test a function called in else condition
I have written a code where I am calling a function in the else case which returns a string. I have mocked it and asserted it to be called once. But this is failing for some reason. This decreases my ...
- 61
1
vote
1
answer
77
views
Why is my phyton mock only working with a specific way of import?
I have a utils class that besides other stuff has a function to get an id:
# utils.py
def get_id():
return ...
Also, there is another class, lets say its about cars, that uses this function:
# ...
- 93
0
votes
2
answers
42
views
How do I mock a function called inside the function that I am testing?
My file structure is like this:
pytests/
├── moduleA/
│ ├── functions/
│ │ └── process_moduleA.py
│ └── test_process_moduleA.py
└── utils/
└── archive.py
in process_moduleA, I have ...
- 11
1
vote
2
answers
157
views
How to replace one class with another in a test and check that its method was called?
I want to replace one class with another in a test and check that its method was called.
An example of what I want to do is the following code:
from unittest.mock import patch
class A:
def ...
0
votes
2
answers
47
views
How to test that the method of an instance has been called?
Let's say I have the following piece of code:
class MyClass:
def __init__(self, value=1):
self.value = value
self.destructive_stuff()
def destructive_stuff(self):
...
- 412
2
votes
1
answer
201
views
How to patch the return value of initializing a class in Python?
I am trying to override the value of an initialized object to a preset value for a unit test. I am using the mock library long with pytest.
Here is code that demonstrates the problem:
def ...
- 93