"""Lambda test module."""

from unittest.mock import MagicMock
from unittest.mock import patch

from src import app
import config


# Mock the environment and template to avoid file system dependency
@patch('src.app.Environment')
def test_handler(mock_env):
    """Test handler function."""
    # Set up the mock objects and their return values
    mock_loader = MagicMock()
    mock_env.return_value = MagicMock(loader=mock_loader)
    mock_template = MagicMock()
    mock_env().get_template.return_value = mock_template
    mock_template.render.return_value = 'Rendered Content'

    fake_event = {}
    fake_context = {}

    response = app.handler(fake_event, fake_context)

    # Check that the response is what you expect
    assert response['statusCode'] == 200
    assert response['statusDescription'] == '200 OK'
    assert response['isBase64Encoded'] is False
    assert response['headers']['Content-Type'] == 'text/html'
    assert response['body'] == 'Rendered Content'

    # Ensure the template was called with the expected context
    mock_env().get_template.assert_called_once_with('index-template.html.j2')
    mock_template.render.assert_called_once_with(accounts=config.AWS_ACCOUNTS_MAPPING)  # noqa: E501