import pytest

from feed_ingestion.conf import config


@pytest.mark.parametrize(
    'c1, c2, expected_result', [
        (
            {'p1': 'c1p1', 'p2': 'c1p2'},
            {'p1': 'c2p1', 'p2': 'c2p2'},
            {'p1': 'c2p1', 'p2': 'c2p2'},
        ),
        (
            {'p1': 'c1p1', 'p2': 'c1p2'},
            {'p1': 'c2p1'},
            {'p1': 'c2p1', 'p2': 'c1p2'},
        ),
        (
            {'p1': 'c1p1'},
            {'p1': 'c2p1', 'p2': 'c2p2'},
            {'p1': 'c2p1', 'p2': 'c2p2'},
        ),
        (
            None,
            {'p1': 'c2p1', 'p2': 'c2p2'},
            {'p1': 'c2p1', 'p2': 'c2p2'},
        ),
        (
            {'p1': 'c1p1', 'p2': 'c1p2'},
            None,
            {'p1': 'c1p1', 'p2': 'c1p2'},
        ),
        (
            None,
            None,
            {},
        ),
    ])
def test_merge_configs(c1, c2, expected_result):
    assert config.merge_configs(c1, c2) == expected_result