/**
 * Turn liveness registry unit tests (src/server/turn-liveness.ts): one turn
 * per chat, ever — begin/end round trip, double-begin rejection, restart
 * after end. The 30-minute stale-eviction TTL is not tested (it is a leak
 * guard, not a behavior).
 */

import assert from "node:assert/strict";
import { describe, it } from "node:test";
import { beginTurn, endTurn, isTurnRunning } from "../src/server/turn-liveness.ts";

describe("turn liveness registry", () => {
	it("begin/end round trip; a second begin is rejected until the turn ends", () => {
		const id = "chat_liveness_unit";
		assert.equal(isTurnRunning(id), false, "initially idle");
		assert.equal(beginTurn(id), true, "first turn accepted");
		assert.equal(isTurnRunning(id), true, "in flight");
		assert.equal(beginTurn(id), false, "no two turns for one chat");
		endTurn(id);
		assert.equal(isTurnRunning(id), false, "cleared at finish");
		assert.equal(beginTurn(id), true, "a new turn may start after the last ended");
		endTurn(id);
	});
});