// 测试纯函数布局/可见性算法。
// 直接 import room-scene-layout.ts,不依赖 RoomSceneStart.ts(后者引入 cc 模块,需 Cocos 运行时)。
// 这与 CLAUDE.md 第二准则一致:纯逻辑放纯文件,被测方无需任何 cc mock。
import { test } from 'node:test';
import assert from 'node:assert/strict';
import { computeActiveFlags, computePositions } from '../../YouleNexus/assets/scripts/room-scene-layout.ts';

test('computeActiveFlags(2, 8) → 前 2 true, 其余 false', () => {
  assert.deepEqual(
    computeActiveFlags(2, 8),
    [true, true, false, false, false, false, false, false],
  );
});

test('computeActiveFlags(4, 8) → 前 4 true, 其余 false', () => {
  assert.deepEqual(
    computeActiveFlags(4, 8),
    [true, true, true, true, false, false, false, false],
  );
});

test('computeActiveFlags(0, 8) → throw', () => {
  assert.throws(() => computeActiveFlags(0, 8), /count must be 1-8/);
});

test('computeActiveFlags(9, 8) → throw (exceeds 8)', () => {
  assert.throws(() => computeActiveFlags(9, 8), /count must be 1-8/);
});

test('computePositions(horizontal, 4) → 4 玩家水平排列居中', () => {
  const positions = computePositions('horizontal', 4);
  assert.equal(positions.length, 4);
  // 对称居中:首末 + 中间两项 sum = 0
  assert.equal(positions[0].x + positions[3].x, 0);
  assert.equal(positions[1].x + positions[2].x, 0);
  // 全员 y=0
  assert.ok(positions.every((p) => p.y === 0));
});