Flask unit test failing due to FileNotFoundError for private key file [duplicate]

Question

I'm trying to run unit tests on a Flask application that utilizes public and private keys for JWT token generation. However, when running my unit tests, I'm getting a FileNotFoundError indicating that the private key file cannot be found.

Here's the structure of my project:

project/
│
├── app/
│   ├── __init__.py
│   ├── user.py
│   ├── news.py
│   ├── public_key.pem
│   └── private_key.pem
│
└── tests/
    ├── __init__.py
    └── test_app.py

The private_key.pem file is used to sign the JWT tokens in the Flask application. However, when running my unit tests, I receive the following error:

FileNotFoundError: [Errno 2] No such file or directory: 'private_key.pem'

Here's a snippet of the code where the private key is loaded:

# Load the private key
with open('private_key.pem', 'r') as f:
    private_key = f.read()

my terminal:

PS C:\Users\ferre\Projects\Portal-de-Noticias> & c:/Users/ferre/Projects/Portal-de-Noticias/.venv/Scripts/python.exe c:/Users/ferre/Projects/Portal-de-Noticias/backend/user_registration/test_app.py
Arquivo public_key.pem não encontrado.
Traceback (most recent call last):
  File "c:\Users\ferre\Projects\Portal-de-Noticias\backend\user_registration\test_app.py", line 4, in <module>
    from user import user_bp
  File "c:\Users\ferre\Projects\Portal-de-Noticias\backend\user_registration\user.py", line 54, in <module>     
    with open('private_key.pem', 'r') as f:
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
FileNotFoundError: [Errno 2] No such file or directory: 'private_key.pem'
PS C:\Users\ferre\Projects\Portal-de-Noticias> 

my test code:

import unittest
from flask import Flask
from flask_cors import CORS
from user import user_bp
from noticias import noticias_bp

class TestApp(unittest.TestCase):
    def setUp(self):
        # Configurar a aplicação Flask para testes
        self.app = Flask(__name__)
        CORS(self.app)
        self.app.secret_key = '2002'
        self.app.register_blueprint(user_bp)
        self.app.register_blueprint(noticias_bp)

        # Configurar o cliente de teste
        self.client = self.app.test_client()

    def test_user_blueprint_registration(self):
        # Verificar se o blueprint do usuário está registrado na aplicação Flask
        self.assertIn('user', self.app.blueprints)

    def test_noticias_blueprint_registration(self):
        # Verificar se o blueprint de notícias está registrado na aplicação Flask
        self.assertIn('noticias', self.app.blueprints)

    def test_user_blueprint_routes(self):
        # Testar se as rotas do blueprint do usuário estão acessíveis
        response = self.client.get('/user/')
        self.assertEqual(response.status_code, 200)

        response = self.client.get('/user/profile')
        self.assertEqual(response.status_code, 200)

    def test_noticias_blueprint_routes(self):
        # Testar se as rotas do blueprint de notícias estão acessíveis
        response = self.client.get('/noticias/')
        self.assertEqual(response.status_code, 200)

        response = self.client.get('/noticias/latest')
        self.assertEqual(response.status_code, 200)

if __name__ == '__main__':
    unittest.main()

How can I solve this issue and get my unit tests to work correctly? Should I include the private key directly in the test code, or is there a better approach to handling this?

Thanks in advance for any help!

Answer 1

When you run the code from the shell you are still in working directory C:\Users\ferre\Projects\Portal-de-Noticias but the keys are in the C:\Users\ferre\Projects\Portal-de-Noticias\app so you should not be able to access them by basename as ""private_key.pem folder.

Try to use instead app/private_key.pem or navigate to app before tests run