"""Test core function handler."""

import app

import pytest


def test_handler(neo4j_session_mock):
    """Basic test for handler function."""
    raised = False
    try:
        result = app.handler(
            {'master_node_uuid': 1, 'child_node_uuids': [2]}, None)
    except:  # noqa: E722
        raised = True
    assert not raised
    assert result.get('status') == 'OK'


def test_handler_unknown_event():
    """Test with invalid event params."""
    result = app.handler({'node_id': 1}, None)
    assert result.get('status') == 'Fail'


def test_handler_raises_exception():
    """Test handler exception."""
    with pytest.raises(Exception):
        app.handler({'master_node_uuid': 123, 'child_node_uuids': 3}, None)