spoc/tests/test_config.py

from unittest.mock import mock_open, patch

from spoc import config

@patch('builtins.open', new_callable=mock_open,
       read_data='{"auths": {"example.com": {"auth": "c29tZXVzZXI6c29tZXBhc3N3b3Jk"}}}')
def test_read_auth(auth_open):
    config.read_auth()

    auth_open.assert_called_once_with(config.REGISTRY_AUTH_FILE, encoding='utf-8')
    assert config.REGISTRY_HOST == 'example.com'
    assert config.REGISTRY_AUTH == ('someuser', 'somepassword')
    assert config.REPO_FILE_URL == 'https://example.com/repository.json'

@patch('builtins.open', side_effect=FileNotFoundError('auth.json'))
def test_read_auth_fallback(auth_open):
    config.read_auth()

    auth_open.assert_called_once_with(config.REGISTRY_AUTH_FILE, encoding='utf-8')
    assert config.REGISTRY_HOST == 'localhost'
    assert config.REGISTRY_AUTH is None
    assert config.REPO_FILE_URL == 'https://localhost/repository.json'

@patch('builtins.open', new_callable=mock_open)
def test_write_auth(auth_open):
    config.write_auth('example.org', 'user', 'anotherpwd')

    auth_open.assert_called_once_with(config.REGISTRY_AUTH_FILE, 'w', encoding='utf-8')
    expected_data = '{"auths": {"example.org": {"auth": "dXNlcjphbm90aGVycHdk"}}}'
    auth_open().write.assert_called_once_with(expected_data)

    assert config.REGISTRY_HOST == 'example.org'
    assert config.REGISTRY_AUTH == ('user', 'anotherpwd')
    assert config.REPO_FILE_URL == 'https://example.org/repository.json'