aaai-core 0.3.0

Core engine for aaai — audit for asset integrity
Documentation 
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//! Unit tests for the diff engine.
//!
//! Placed in a dedicated `tests.rs` per the project style guide (別紙).

use std::fs;
use std::path::PathBuf;

use super::engine::DiffEngine;
use super::entry::DiffType;

// ── helpers ──────────────────────────────────────────────────────────────

fn tmp_dir() -> tempfile::TempDir {
    tempfile::tempdir().expect("tempdir")
}

fn write(dir: &std::path::Path, rel: &str, content: &str) {
    let path = dir.join(rel);
    if let Some(parent) = path.parent() {
        fs::create_dir_all(parent).unwrap();
    }
    fs::write(&path, content).unwrap();
}

fn find(diffs: &[super::entry::DiffEntry], path: &str) -> super::entry::DiffEntry {
    diffs.iter().find(|d| d.path == path)
        .unwrap_or_else(|| panic!("entry not found: {path}"))
        .clone()
}

// ── tests ─────────────────────────────────────────────────────────────────

#[test]
fn detects_added_file() {
    let before = tmp_dir();
    let after  = tmp_dir();
    write(after.path(), "new.txt", "hello");

    let diffs = DiffEngine::compare(before.path(), after.path()).unwrap();
    let e = find(&diffs, "new.txt");
    assert_eq!(e.diff_type, DiffType::Added);
    assert!(e.after_text.is_some());
}

#[test]
fn detects_removed_file() {
    let before = tmp_dir();
    let after  = tmp_dir();
    write(before.path(), "gone.toml", "[x]");

    let diffs = DiffEngine::compare(before.path(), after.path()).unwrap();
    let e = find(&diffs, "gone.toml");
    assert_eq!(e.diff_type, DiffType::Removed);
}

#[test]
fn detects_modified_file() {
    let before = tmp_dir();
    let after  = tmp_dir();
    write(before.path(), "cfg.toml", "port = 80\n");
    write(after.path(),  "cfg.toml", "port = 8080\n");

    let diffs = DiffEngine::compare(before.path(), after.path()).unwrap();
    let e = find(&diffs, "cfg.toml");
    assert_eq!(e.diff_type, DiffType::Modified);
    assert_ne!(e.before_text, e.after_text);
}

#[test]
fn detects_unchanged_file() {
    let before = tmp_dir();
    let after  = tmp_dir();
    write(before.path(), "same.txt", "content");
    write(after.path(),  "same.txt", "content");

    let diffs = DiffEngine::compare(before.path(), after.path()).unwrap();
    let e = find(&diffs, "same.txt");
    assert_eq!(e.diff_type, DiffType::Unchanged);
}

#[test]
fn output_is_sorted() {
    let before = tmp_dir();
    let after  = tmp_dir();
    write(after.path(), "z.txt", "z");
    write(after.path(), "a.txt", "a");
    write(after.path(), "m.txt", "m");

    let diffs = DiffEngine::compare(before.path(), after.path()).unwrap();
    let paths: Vec<_> = diffs.iter().map(|d| d.path.as_str()).collect();
    let mut sorted = paths.clone();
    sorted.sort();
    assert_eq!(paths, sorted);
}

#[test]
fn nested_paths_use_forward_slash() {
    let before = tmp_dir();
    let after  = tmp_dir();
    write(after.path(), "sub/dir/file.txt", "hi");

    let diffs = DiffEngine::compare(before.path(), after.path()).unwrap();
    let paths: Vec<_> = diffs.iter().map(|d| d.path.as_str()).collect();
    assert!(paths.iter().any(|p| p.contains('/')));
    assert!(!paths.iter().any(|p| p.contains('\\')));
}

#[test]
fn sha256_present_for_after_file() {
    let before = tmp_dir();
    let after  = tmp_dir();
    write(after.path(), "file.bin", "data");

    let diffs = DiffEngine::compare(before.path(), after.path()).unwrap();
    let e = find(&diffs, "file.bin");
    assert!(e.after_sha256.is_some());
    let sha = e.after_sha256.unwrap();
    assert_eq!(sha.len(), 64);
    assert!(sha.chars().all(|c| c.is_ascii_hexdigit()));
}

#[test]
fn before_root_must_be_directory() {
    let result = DiffEngine::compare(
        std::path::Path::new("/nonexistent/path"),
        std::path::Path::new("/tmp"),
    );
    assert!(result.is_err());
}