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: wav_test.rs
    path of file: ./repos/rodio/tests
    
    the code of the file until where you have to start completion: use std::io::BufReader;

#[test]
fn test_wav_encodings() {
    // 16 bit wav file ex
    
fn test_wav_encodings() {
    // 16 bit wav file exported from Audacity (1 channel)
    let file = std::fs::File::open("assets/audacity16bit.wav").unwrap();
    let mut decoder = rodio::Decoder::new(BufReader::new(file)).unwrap();
    assert!(decoder.any(|x| x != 0)); // Assert not all zeros

    // 16 bit wav file exported from LMMS (2 channels)
    let file = std::fs::File::open("assets/lmms16bit.wav").unwrap();
    let mut decoder = rodio::Decoder::new(BufReader::new(file)).unwrap();
    assert!(decoder.any(|x| x != 0));

    // 24 bit wav file exported from LMMS (2 channels)
    let file = std::fs::File::open("assets/lmms24bit.wav").unwrap();
    let mut decoder = rodio::Decoder::new(BufReader::new(file)).unwrap();
    assert!(decoder.any(|x| x != 0));

    // 32 bit wav file exported from Audacity (1 channel)
    let file = std::fs::File::open("assets/audacity32bit.wav").unwrap();
    let mut decoder = rodio::Decoder::new(BufReader::new(file)).unwrap();
    assert!(decoder.any(|x| x != 0));

    // 32 bit wav file exported from LMMS (2 channels)
    let file = std::fs::File::open("assets/lmms32bit.wav").unwrap();
    let mut decoder = rodio::Decoder::new(BufReader::new(file)).unwrap();
    assert!(decoder.any(|x| x != 0));

    // 32 bit signed integer wav file exported from Audacity (1 channel).
    let file = std::fs::File::open("assets/audacity32bit_int.wav").unwrap();
    let mut decoder = rodio::Decoder::new(BufReader::new(file)).unwrap();
    assert!(decoder.any(|x| x != 0));
}