"""Unit tests for the logic layer."""

from logic import label_participant

import pytest


@pytest.fixture
def label_participant_id():
    """Mock label participant ID."""
    return 1


def test_merge_lp_nodes(mocker, label_participant_id):
    """Assert logic calls model successfully."""
    mock_merge_lp_nodes = mocker.patch(
        'model.label_participant.merge_lp_nodes',
        return_value=label_participant_id
    )
    result = label_participant.merge_lp_nodes(
        master_node_uuid=1, child_node_uuids=2)
    assert label_participant_id == result
    mock_merge_lp_nodes.assert_called_with(1, 2)


def test_merge_lp_nodes_fail():
    """Assert TypeError when one of param is missing."""
    with pytest.raises(TypeError):
        label_participant.merge_lp_nodes(master_node_uuid=1)