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Unit testing AuthService

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Kodjo Sossouvi
2025-10-18 12:26:55 +02:00
commit 79a31ecf40
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# tests/core/test_auth_service.py
from datetime import datetime, timedelta
from unittest.mock import MagicMock, patch
import pytest
from src.my_auth.core.auth import AuthService
from src.my_auth.exceptions import UserAlreadyExistsError, InvalidCredentialsError, InvalidTokenError, ExpiredTokenError
from src.my_auth.models.token import TokenData
from src.my_auth.models.user import UserCreate, UserUpdate
class TestAuthServiceRegisterLogin(object):
"""Tests for the user registration and login processes."""
# The mocks are injected via the auth_service fixture from conftest.py
def test_register_success(self, auth_service: AuthService,
test_user_data_create: UserCreate):
"""Success: Registration works and stores the predictable hash."""
user = auth_service.register(test_user_data_create)
assert user is not None
assert user.hashed_password == "PREDICTABLE_HASHED_PASSWORD_FOR_TESTING"
auth_service.password_manager.hash_password.assert_called_once_with(test_user_data_create.password)
def test_register_failure_if_email_exists(self, auth_service: AuthService,
test_user_data_create: UserCreate):
"""Failure: Cannot register if the email already exists."""
auth_service.register(test_user_data_create)
with pytest.raises(UserAlreadyExistsError):
auth_service.register(test_user_data_create)
def test_login_success(self, auth_service: AuthService, test_user_data_create: UserCreate):
"""Success: Logging in with correct credentials generates and saves tokens."""
# Execute register to insert the user
auth_service.register(test_user_data_create)
# Execute login
user, tokens = auth_service.login(test_user_data_create.email, test_user_data_create.password)
assert user.email == test_user_data_create.email
auth_service.password_manager.verify_password.assert_called_once()
auth_service.token_manager.create_access_token.assert_called_once()
assert tokens.access_token == "MOCKED_ACCESS_TOKEN"
assert tokens.refresh_token == "MOCKED_REFRESH_TOKEN"
def test_login_failure_invalid_password(self, auth_service: AuthService, # Removed mock_password_manager injection
test_user_data_create: UserCreate):
"""Failure: Login fails with InvalidCredentialsError if the password is wrong."""
# Access the manager via the service instance
pm = auth_service.password_manager
# Setup: Mock hash for registration
pm.hash_password.return_value = "HASH"
auth_service.register(test_user_data_create)
# Mock verify for failure
pm.verify_password.return_value = False
with pytest.raises(InvalidCredentialsError):
auth_service.login(test_user_data_create.email, "WrongPassword!")
# Restore the default mock behavior defined in conftest for subsequent tests
pm.hash_password.return_value = "PREDICTABLE_HASHED_PASSWORD_FOR_TESTING"
pm.verify_password.return_value = True
def test_login_failure_user_not_found(self, auth_service: AuthService):
"""Failure: Login fails if the user does not exist."""
with pytest.raises(InvalidCredentialsError):
auth_service.login("non.existent@example.com", "AnyPassword")
class TestAuthServiceTokenManagement(object):
"""Tests for token-related flows (Refresh, Logout, GetCurrentUser)."""
@pytest.fixture(autouse=True)
def setup_user_and_token(self, auth_service: AuthService, test_user_data_create: UserCreate):
"""
Sets up a registered user and an initial set of tokens for management tests.
Temporarily overrides manager behavior for setup.
"""
# Temporarily set up predictable values for the registration/login flow within the fixture setup
pm = auth_service.password_manager
tm = auth_service.token_manager
original_hash = pm.hash_password.return_value
original_verify = pm.verify_password.return_value
original_access = tm.create_access_token.return_value
original_refresh = tm.create_refresh_token.return_value
pm.hash_password.return_value = "HASHED_PASS"
pm.verify_password.return_value = True
tm.create_access_token.return_value = "SETUP_ACCESS_TOKEN"
tm.create_refresh_token.return_value = "SETUP_REFRESH_TOKEN"
user = auth_service.register(test_user_data_create)
_, tokens = auth_service.login(test_user_data_create.email, test_user_data_create.password)
self.user = user
self.refresh_token = tokens.refresh_token
self.access_token = tokens.access_token
# Restore mock values to default conftest behavior for the actual tests
pm.hash_password.return_value = original_hash
pm.verify_password.return_value = original_verify
tm.create_access_token.return_value = original_access
tm.create_refresh_token.return_value = original_refresh
def test_refresh_access_token_success(self, auth_service: AuthService):
"""Success: Refreshing an access token works with a valid refresh token."""
# Access the manager via the service instance
tm = auth_service.token_manager
# Use patch.object on the *instance* for granular control within the test
with patch.object(tm, 'create_access_token',
return_value="NEW_MOCKED_ACCESS_TOKEN") as mock_create_access:
tokens = auth_service.refresh_access_token(self.refresh_token)
assert tokens.access_token == "NEW_MOCKED_ACCESS_TOKEN"
mock_create_access.assert_called_once()
def test_refresh_access_token_failure_invalid_token(self, auth_service: AuthService):
"""Failure: Refreshing fails if the token is invalid (revoked, expired, etc.)."""
auth_service.logout(self.refresh_token)
with pytest.raises(InvalidTokenError):
auth_service.refresh_access_token("invalid_token")
def test_logout_success(self, auth_service: AuthService):
"""Success: Logout revokes the specified refresh token."""
result = auth_service.logout(self.refresh_token)
assert result is True
with pytest.raises(InvalidTokenError):
auth_service.refresh_access_token(self.refresh_token)
def test_get_current_user_success(self, auth_service: AuthService):
"""Success: Getting the current user works by successfully decoding the JWT."""
# Mock the decoder to simulate a decoded payload
with patch.object(auth_service.token_manager, 'decode_access_token',
return_value={"sub": self.user.id}) as mock_decode:
user = auth_service.get_current_user("dummy_jwt")
assert user.id == self.user.id
mock_decode.assert_called_once()
def test_get_current_user_failure_invalid_token(self, auth_service: AuthService):
"""Failure: Getting the current user fails if the access token is invalid/expired."""
with patch.object(auth_service.token_manager, 'decode_access_token',
side_effect=InvalidTokenError("Invalid signature")):
with pytest.raises(InvalidTokenError):
auth_service.get_current_user("invalid_access_jwt")
with patch.object(auth_service.token_manager, 'decode_access_token',
side_effect=ExpiredTokenError("Token expired")):
with pytest.raises(ExpiredTokenError):
auth_service.get_current_user("expired_access_jwt")
class TestAuthServiceResetVerification(object):
"""Tests for password reset and email verification flows."""
@pytest.fixture(autouse=True)
def setup_user(self, auth_service: AuthService, test_user_data_create: UserCreate):
"""Sets up a registered user using a mock hash for speed."""
pm = auth_service.password_manager
original_hash = pm.hash_password.return_value
# Temporarily set hash for setup
pm.hash_password.return_value = "HASHED_PASS"
user = auth_service.register(test_user_data_create)
self.user = user
# Restore hash mock
pm.hash_password.return_value = original_hash
@patch('src.my_auth.core.email.send_email')
def test_request_password_reset_success(self, mock_send_email: MagicMock, auth_service: AuthService):
"""Success: Requesting a password reset generates a token and sends an email."""
tm = auth_service.token_manager
with patch.object(tm, 'create_password_reset_token',
return_value="MOCKED_RESET_TOKEN") as mock_create_token:
token_string = auth_service.request_password_reset(self.user.email)
assert token_string == "MOCKED_RESET_TOKEN"
mock_create_token.assert_called_once()
mock_send_email.assert_called_once()
def test_reset_password_success(self, auth_service: AuthService):
"""Success: Resetting the password works with a valid token."""
# Setup: Manually create a valid reset token
auth_service.token_repository.save_token(
TokenData(token="valid_reset_token", token_type="password_reset", user_id=self.user.id,
expires_at=datetime.now() + timedelta(minutes=10))
)
# Patch the PasswordManager instance to control the hash output
pm = auth_service.password_manager
with patch.object(pm, 'hash_password',
return_value="NEW_HASHED_PASSWORD_FOR_RESET") as mock_hash:
new_password = "NewPassword123!"
result = auth_service.reset_password("valid_reset_token", new_password)
assert result is True
mock_hash.assert_called_once_with(new_password)
# Verification: Check that user data was updated
updated_user = auth_service.user_repository.get_user_by_id(self.user.id)
assert updated_user.hashed_password == "NEW_HASHED_PASSWORD_FOR_RESET"
@patch('src.my_auth.core.email.send_email')
def test_request_email_verification_success(self, mock_send_email: MagicMock, auth_service: AuthService):
"""Success: Requesting verification generates a token and sends an email."""
tm = auth_service.token_manager
with patch.object(tm, 'create_email_verification_token',
return_value="MOCKED_JWT_VERIFY_TOKEN") as mock_create_token:
token_string = auth_service.request_email_verification(self.user.email)
assert token_string == "MOCKED_JWT_VERIFY_TOKEN"
mock_create_token.assert_called_once_with(self.user.email)
mock_send_email.assert_called_once()
def test_verify_email_success(self, auth_service: AuthService):
"""Success: Verification updates the user's status."""
# The token_manager is mocked in conftest, so we must access its real create method
# or rely on the mock's return value to get a token string to use in the call.
# Since we need a real token for the decode logic to pass, we need to bypass the mock here.
# We will temporarily use the real TokenManager to create a valid, decodable token.
# This requires an *unmocked* token manager instance, which is tricky in this setup.
# Alternative: Temporarily inject a real TokenManager for this test (or rely on a non-mocked method)
# Assuming TokenManager.create_email_verification_token can be mocked to return a static string
# and TokenManager.decode_email_verification_token can be patched to simulate success.
# Since the method calls decode_email_verification_token internally, we mock the output of the decode step.
# Setup: Ensure user is unverified
auth_service.user_repository.update_user(self.user.id, UserUpdate(is_verified=False))
tm = auth_service.token_manager
# Mock the decode step to ensure it returns the email used for verification
with patch.object(tm, 'decode_email_verification_token', return_value=self.user.email) as mock_decode:
# Test (we use a dummy token string as the decode step is mocked)
result = auth_service.verify_email("dummy_verification_token")
assert result is True
mock_decode.assert_called_once()
# Verification: User is verified
updated_user = auth_service.user_repository.get_user_by_id(self.user.id)
assert updated_user.is_verified is True