All Questions
Tagged with pythonunit-testing
67 questions
5votes
5answers
505views
How to test for performance regression?
I am working on a refactor on a certain package (I can give details if asked). The package involves a clever lazy evaluation of a sort of nested sequence of arithmetic operations. If the numerical ...
- 343
41votes
6answers
55kviews
Why is unit testing private methods considered as bad practice?
Context: I am currently working on a small project in Python. I commonly structure my classes with some public methods that are documented but mainly deal with the high level concepts (what a user of ...
2votes
2answers
533views
Best practices for unit testing when breaking down functions into smaller ones
Say we have a function of the form def func(num: int) -> int: num = num + 1 num = 2 * num num = num**3 return num and let us act like each line is a long computation so that we ...
- 39
14votes
3answers
3kviews
Should I choose repeated code in unit test or test logic? Can I avoid both?
When writing unit tests, I feel that there is a trade-off between code repetition and test logic. Example of my current (likely flawed) approach: To test this function (overly simple function for ...
- 161
0votes
2answers
425views
What is a good unit testing strategy against a chain of public method calls?
say I have this code which is a chain of public methods, public_c calls public_b calls public_a def public_a(...): ... def public_b(...): ... public_a(...) def public_c(...): ... ...
- 199
18votes
1answer
7kviews
Is it possible/advisable to combine unit testing and integration testing?
I've built a Python script that consists of about 20 functions that extract data from MySQL via .sql files (I'm currently trying to learn SQLAlchemy ORM), do something to it and then put it back in ...
- 311
-1votes
1answer
172views
Efficient way to write test cases depending on a Micro service
I'm very new to microservice architecture. In the Monolithic app structure, it was pretty straightforward to write test cases since everything was in one app. I have a situation where I manage a ...
- 115
1vote
3answers
1kviews
Should I unit test functions internally used by API I expose?
I'm writing a CRUD app in Python that exposes web API. At first I wrote functions for communicating with DB and wrote tests for these functions. def crud(): # do something with db def test_crud(): ...
-1votes
1answer
128views
Software development in Python: unittests and assertions
I recently finished developing a piece of software in python where learning models and data processing procedures are contained within different class objects that succeed to each others (modules). As ...
- 125
2votes
3answers
1kviews
Still don't understand when to mock and when not to
I've been trying to understand when to mock and when not to mock, however I'm not able to come up with a consistent guideline and I'm hoping to get some input on the subject. Let's look at the ...
- 175
5votes
2answers
7kviews
pep8 (D103) I need docstrings for my unit test functions too?
Perhaps im not defining my pytests right but im seeing this: Does pep8 demand a docstring for each unit test function too? I cant find pep8 docs specific to this, wondering if pep8/flake8 is unit test ...
- 183
7votes
2answers
348views
Should examples for functions be unit tests?
I'm writing a python function to replace all the non-alphanumeric characters in the keys of this dictionary with underscores. To make sure it's working as expected as I don't have a ton of ...
- 181
2votes
1answer
2kviews
Should I check floating point values in a unit test?
We have unit tests that are running some underlying model. We provide it with some test input, and receive some outputs + floating point scores. What's a good practice from a unit-testing standpoint? ...
- 175
2votes
2answers
343views
What is a good way to call a unit-tested function provided by a library/package?
Consider the function foo provided by package X in Python. I want to test the different functionalities of X.foo, and then use X.foo in my code. To make sure that I am using X.foo as it was tested, I ...
- 131
0votes
1answer
1kviews
How to test a function with several conditional nested side effects
In Python, consider a function like the following: def main(*args): value1 = pure_function1(*args) if condition(value1): value = side_effect1(value1) if value: ...
- 109
