def METHOD_NAME():
    client = boto3.client("budgets", region_name="us-east-1")
    with pytest.raises(ClientError) as exc:
        client.delete_budget(AccountId=ACCOUNT_ID, BudgetName="unknown")
    err = exc.value.response["Error"]
    assert err["Code"] == "NotFoundException"
    assert (
        err["Message"]
        == "Unable to delete budget: unknown - the budget doesn't exist. Try creating it first. "
    )