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: ref.rs
    path of file: ./repos/alacritty/alacritty_terminal/tests
    
    the code of the file until where you have to start completion: #![cfg(feature = "serde")]
use serde::Deserialize;
use serde_json as json;

use std::fs::{self, File};
use std::io::Read;
use std::path::Path;

use alacritty_terminal::event::{Event, EventListener};
use alacritty_terminal::grid::{Dimensions, Grid};
use alacritty_terminal::index::{Column, Line};
use alacritty_terminal::term::cell::Cell;
use alacritty_terminal::term::test::TermSize;
use alacritty_terminal::term::{Config, Term};
use alacritty_terminal::vte::ansi;

macro_rules! ref_tests {
    ($($name:ident)*) => {
        $(
            #[test]
            fn $name() {
                let test_dir = Path::new(concat!(env!("CARGO_MANIFEST_DIR"), "/tests/ref"));
                let test_path = test_dir.join(stringify!($name));
                ref_test(&test_path)
    
fn ref_test(dir: &Path) {
    let recording = read_u8(dir.join("alacritty.recording"));
    let serialized_size = fs::read_to_string(dir.join("size.json")).unwrap();
    let serialized_grid = fs::read_to_string(dir.join("grid.json")).unwrap();
    let serialized_cfg = fs::read_to_string(dir.join("config.json")).unwrap();

    let size: TermSize = json::from_str(&serialized_size).unwrap();
    let grid: Grid<Cell> = json::from_str(&serialized_grid).unwrap();
    let ref_config: RefConfig = json::from_str(&serialized_cfg).unwrap();

    let options =
        Config { scrolling_history: ref_config.history_size as usize, ..Default::default() };

    let mut terminal = Term::new(options, &size, Mock);
    let mut parser: ansi::Processor = ansi::Processor::new();

    for byte in recording {
        parser.advance(&mut terminal, byte);
    }

    // Truncate invisible lines from the grid.
    let mut term_grid = terminal.grid().clone();
    term_grid.initialize_all();
    term_grid.truncate();

    if grid != term_grid {
        for i in 0..grid.total_lines() {
            for j in 0..grid.columns() {
                let cell = &term_grid[Line(i as i32)][Column(j)];
                let original_cell = &grid[Line(i as i32)][Column(j)];
                if original_cell != cell {
                    println!("[{i}][{j}] {original_cell:?} => {cell:?}",);
                }
            }
        }

        panic!("Ref test failed; grid doesn't match");
    }

    assert_eq!(grid, term_grid);
}