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: parquet.rs
    path of file: ./repos/polars/crates/polars/tests/it/chunks
    
    the code of the file until where you have to start completion: use std::io::{Seek, SeekFrom};

use polars::prelude::*;

#[test]
fn t
    
fn test_cast_join_14872() {
    let df1 = df![
        "ints" => [1]
    ]
    .unwrap();

    let mut df2 = df![
        "ints" => [0, 1],
        "strings" => vec![Series::new("", ["a"]); 2],
    ]
    .unwrap();

    let mut buf = std::io::Cursor::new(vec![]);
    ParquetWriter::new(&mut buf)
        .with_row_group_size(Some(1))
        .finish(&mut df2)
        .unwrap();

    let _ = buf.seek(SeekFrom::Start(0));
    let df2 = ParquetReader::new(buf).finish().unwrap();

    let out = df1
        .join(&df2, ["ints"], ["ints"], JoinArgs::new(JoinType::Left))
        .unwrap();

    let expected = df![
        "ints" => [1],
        "strings" => vec![Series::new("", ["a"]); 1],
    ]
    .unwrap();

    assert!(expected.equals(&out));
}