blazehash 0.2.5

Forensic file hasher — hashdeep for the modern era, BLAKE3 by default
Documentation 
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use assert_cmd::Command;
use std::fs;
use tempfile::tempdir;

#[test]
fn test_update_appends_new_file() {
    let dir = tempdir().unwrap();
    let manifest = dir.path().join("manifest.hash");
    let existing = dir.path().join("existing.bin");
    let new_file = dir.path().join("new.bin");

    fs::write(&existing, b"hello").unwrap();
    Command::cargo_bin("blazehash")
        .unwrap()
        .args(["-o", manifest.to_str().unwrap(), existing.to_str().unwrap()])
        .assert()
        .success();

    fs::write(&new_file, b"world").unwrap();

    Command::cargo_bin("blazehash")
        .unwrap()
        .args(["update", manifest.to_str().unwrap(), dir.path().to_str().unwrap()])
        .assert()
        .success();

    let contents = fs::read_to_string(&manifest).unwrap();
    assert!(contents.contains("new.bin"), "update should append new.bin");
    assert!(contents.contains("existing.bin"), "update should keep existing.bin");
}

#[test]
fn test_update_removes_deleted_file() {
    let dir = tempdir().unwrap();
    let manifest = dir.path().join("manifest.hash");
    let f1 = dir.path().join("f1.bin");
    let f2 = dir.path().join("f2.bin");

    fs::write(&f1, b"aaa").unwrap();
    fs::write(&f2, b"bbb").unwrap();

    Command::cargo_bin("blazehash")
        .unwrap()
        .args(["-r", "-o", manifest.to_str().unwrap(), dir.path().to_str().unwrap()])
        .assert()
        .success();

    fs::remove_file(&f2).unwrap();

    Command::cargo_bin("blazehash")
        .unwrap()
        .args(["update", manifest.to_str().unwrap(), dir.path().to_str().unwrap()])
        .assert()
        .success();

    let contents = fs::read_to_string(&manifest).unwrap();
    assert!(!contents.contains("f2.bin"), "deleted file should be removed from manifest");
}

#[test]
fn test_update_rehashes_changed_file() {
    let dir = tempdir().unwrap();
    let manifest = dir.path().join("manifest.hash");
    let f = dir.path().join("data.bin");

    fs::write(&f, b"original").unwrap();

    Command::cargo_bin("blazehash")
        .unwrap()
        .args(["-o", manifest.to_str().unwrap(), f.to_str().unwrap()])
        .assert()
        .success();

    let before = fs::read_to_string(&manifest).unwrap();

    fs::write(&f, b"changed content here").unwrap();

    Command::cargo_bin("blazehash")
        .unwrap()
        .args(["update", manifest.to_str().unwrap(), dir.path().to_str().unwrap()])
        .assert()
        .success();

    let after = fs::read_to_string(&manifest).unwrap();
    assert_ne!(before, after, "manifest should change after file content change");
    assert!(after.contains("20,") || after.contains(",20,") || after.contains(" 20 "), "updated manifest should reflect new size");
}