PytestSetting Project Test System

Internal

• Pytest

Install pytest

Install pytest in the virtual environment associated with your project:

Pytest Installation

Layout

...
 └─ tests
     ├─ data
     ├─ util.py # get_data_file()
     └─ my_module
         └─ test_my_function.py

Environment

Add the path to the directory that contains the module to test (in this case ./src/main/python contains my_module_to_test.py):

PYTHONPATH="$(dirname $0)/src/main/python"
export PYTHONPATH

This can be added to .envrc as follows:

PYTHONPATH="${PWD}/src/main/python"
export PYTHONPATH

Structure of a Test File

import pytest
from pathlib import Path
from my_module_to_test import some_function

def get_test_file(file_name):
    return Path(Path(__file__).parent, f'./data/{file_name}')