You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: mod.rs
    path of file: ./repos/snarkVM/synthesizer/program/src/closure
    
    the code of the file until where you have to start completion: // Copyright (C) 2019-2023 Aleo Systems Inc.
// This file is part of the snarkVM library.

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at:
// http://www.apache.org/licenses/LICENSE-2.0

// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing perm
    
    fn test_add_input() {
        // Initialize a new closure instance.
        let name = Identifier::from_str("closure_core_test").unwrap();
        let mut closure = Closure::<CurrentNetwork>::new(name);

        // Ensure that an input can be added.
        let input = Input::<CurrentNetwork>::from_str("input r0 as field;").unwrap();
        assert!(closure.add_input(input.clone()).is_ok());

        // Ensure that adding a duplicate input will fail.
        assert!(closure.add_input(input).is_err());

        // Ensure that adding more than the maximum number of inputs will fail.
        for i in 1..CurrentNetwork::MAX_INPUTS * 2 {
            let input = Input::<CurrentNetwork>::from_str(&format!("input r{i} as field;")).unwrap();

            match closure.inputs.len() < CurrentNetwork::MAX_INPUTS {
                true => assert!(closure.add_input(input).is_ok()),
                false => assert!(closure.add_input(input).is_err()),
            }
        }
    }