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: expand.rs
    path of file: ./repos/nushell/crates/nu-command/tests/commands/path
    
    the code of the file until where you have to start completion: use nu_test_support::fs::Stub::EmptyFile;
use nu_test_support::playground::Playground;
use nu_test_support::{nu, pipeline};

use std::path::PathBuf;

#[test]
fn expands_path_with_dot() {
    Playground::setup("path_expand_1", |dirs, sandbox| {
        sandbox
         
    
    fn expands_path_with_tilde_backward_slash() {
        Playground::setup("path_expand_2", |dirs, _| {
            let actual = nu!(
                cwd: dirs.test(), pipeline(
                r#"
                    echo "~\tmp.txt" | path expand
                "#
            ));

            assert!(!PathBuf::from(actual.out).starts_with("~"));
        })
    }