dircat 0.2.0

High-performance Rust utility that concatenates and displays directory contents, similar to the C++ DirCat.
Documentation 
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// tests/process_order.rs

mod common;

use assert_cmd::prelude::*;
use common::dircat_cmd;
use predicates::prelude::*;
use std::fs;
use tempfile::tempdir;

#[test]
fn test_process_last_glob() -> Result<(), Box<dyn std::error::Error>> {
    let temp = tempdir()?;
    let sub = temp.path().join("sub");
    fs::create_dir(&sub)?;
    fs::write(temp.path().join("a.txt"), "A")?;
    fs::write(sub.join("b.rs"), "B")?;
    fs::write(temp.path().join("last.md"), "LAST_MD")?;
    fs::write(sub.join("final.rs"), "FINAL_RS")?;

    // Process *.md and sub/*.rs last, in that order
    dircat_cmd()
        .arg("-z")
        .arg("*.md") // Match last.md
        .arg("-z")
        .arg("sub/*.rs") // Match sub/b.rs and sub/final.rs
        .current_dir(temp.path())
        .assert()
        .success()
        .stdout(predicate::function(|output: &str| {
            // Find the positions of the file headers
            let pos_a = output.find("## File: a.txt").unwrap_or(usize::MAX);
            let pos_last_md = output.find("## File: last.md").unwrap_or(usize::MAX);
            // Note: sub/b.rs and sub/final.rs match the second glob.
            // Their relative order among themselves is alphabetical.
            let pos_sub_b = output.find("## File: sub/b.rs").unwrap_or(usize::MAX);
            let pos_sub_final = output.find("## File: sub/final.rs").unwrap_or(usize::MAX);

            // Check normal file comes first
            let normal_ok = pos_a < pos_last_md && pos_a < pos_sub_b && pos_a < pos_sub_final;

            // Check file matching first glob comes before files matching second glob
            let glob1_ok = pos_last_md < pos_sub_b && pos_last_md < pos_sub_final;

            // Check files matching second glob appear last, ordered alphabetically
            let glob2_order_ok = pos_sub_b < pos_sub_final;

            normal_ok && glob1_ok && glob2_order_ok
        }));

    temp.close()?;
    Ok(())
}

#[test]
fn test_only_last_glob() -> Result<(), Box<dyn std::error::Error>> {
    let temp = tempdir()?;
    let sub = temp.path().join("sub");
    fs::create_dir(&sub)?;
    fs::write(temp.path().join("a.txt"), "A")?;
    fs::write(sub.join("b.rs"), "B")?;
    fs::write(temp.path().join("last.md"), "LAST")?;

    // Process only *.md
    dircat_cmd()
        .arg("-z")
        .arg("*.md")
        .arg("-Z") // Only last
        .current_dir(temp.path())
        .assert()
        .success()
        .stdout(predicate::str::contains("## File: last.md"))
        .stdout(predicate::str::contains("LAST"))
        .stdout(predicate::str::contains("## File: a.txt").not())
        .stdout(predicate::str::contains("## File: sub/b.rs").not());

    temp.close()?;
    Ok(())
}