/**
 * Spec-conformance test for `openspec/specs/crypto-utils/spec.md` —
 * "No vendored code" requirement. Pins the structural invariant that
 * `src/vendored/` does not exist anywhere in this package.
 */
import { existsSync, readdirSync, statSync } from "node:fs";
import { dirname, join } from "node:path";
import { fileURLToPath } from "node:url";
import { describe, expect, it } from "@suaveplan/testing/runner";

const HERE = dirname(fileURLToPath(import.meta.url));

function* walk(dir: string): Generator<string> {
    for (const entry of readdirSync(dir)) {
        const p = join(dir, entry);
        const s = statSync(p);
        if (s.isDirectory()) {
            yield p;
            yield* walk(p);
        }
    }
}

describe("crypto-utils — no vendored code", () => {
    it("src/ contains no vendored directory", { timeout: 5000 }, () => {
        const srcDir = HERE; // already inside src/
        expect(existsSync(srcDir)).toBe(true);
        const offenders: string[] = [];
        for (const dir of walk(srcDir)) {
            if (dir.endsWith("/vendored") || dir.endsWith("\\vendored")) {
                offenders.push(dir);
            }
        }
        expect(offenders).toEqual([]);
    });
});