def METHOD_NAME():
    """Test to ensure that the context manager correctly is set to bfloat16."""
    precision = FSDPPrecision(precision="16-mixed")
    assert isinstance(precision.scaler, torch.cuda.amp.GradScaler)
    assert torch.get_default_dtype() == torch.float32
    with precision.forward_context():
        # check with str due to a bug upstream: https://github.com/pytorch/pytorch/issues/65786
        assert str(torch.get_autocast_gpu_dtype()) in ("torch.float16", "torch.half")
    precision = FSDPPrecision(precision="bf16-mixed")
    assert precision.scaler is None
    with precision.forward_context():
        # check with str due to a bug upstream: https://github.com/pytorch/pytorch/issues/65786
        assert str(torch.get_autocast_gpu_dtype()) == str(torch.bfloat16)
    context_manager = precision._autocast_context_manager()
    assert isinstance(context_manager, torch.autocast)
    # check with str due to a bug upstream: https://github.com/pytorch/pytorch/issues/65786
    assert str(context_manager.fast_dtype) == str(torch.bfloat16)