def METHOD_NAME() -> None:
    """Test evaluate function."""
    # Prepare
    strategy = FaultTolerantFedAvg(min_completion_rate_evaluate=0.5)
    results: List[Tuple[ClientProxy, EvaluateRes]] = [
        (
            MagicMock(),
            EvaluateRes(
                status=Status(code=Code.OK, message="Success"),
                loss=2.3,
                num_examples=1,
                metrics={},
            ),
        )
    ]
    failures: List[Union[Tuple[ClientProxy, EvaluateRes], BaseException]] = [
        Exception(),
        Exception(),
    ]
    expected: Optional[float] = None
    # Execute
    actual, _ = strategy.aggregate_evaluate(1, results, failures)
    # Assert
    assert actual == expected