test(scripts): PoC 阶段 3 - Login_Layer 端到端 _lpos 测试

参考 brief task-11-brief.md, 验证 Layer00002.xml → Login_Layer.prefab 在
渠道logo (Spirit405) + 游客登录 (Spirit177) 两个 anchor 节点 _lpos 误差 < 0.001.

测试目前因 ImgResID 427 (00427.png) 缺失 sprite 而 FAIL — 该 throw 属
'下游不兜底' 规则预期行为 (brief 已说明 ImgResID 107 也可能 throw). 详见
task-11-report.md.

cocoscreator_projects/framework-tests/legacy-layer-migration/poc-login.test.mjs

@@ -0,0 +1,44 @@
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+import { execSync } from 'node:child_process';
+import { readFileSync } from 'node:fs';
+
+// PoC 阶段 3 端到端: Layer00002.xml Login_Layer (18 spirits, group 2, 包含 Spirit405 渠道logo +
+// Spirit177 游客登录 anchor-test cases). 验证生成 prefab 与 fixtures/Login_Layer.prefab 在
+// 渠道logo + 游客登录两个 anchor 节点 _lpos 精度 < 0.001.
+//
+// 路径从 cocoscreator_projects/ 运行 (与 poc-protocol.test.mjs / poc-iconbutton.test.mjs 风格一致).
+const CLI = 'node scripts/legacy-layer-to-cocos-prefab-cli.mjs';
+const INPUT = '../projects/Game_Surface_3/save/Layer00002.xml';
+const TARGET = 'YouleNexus/assets/framework/ui/prefabs/Login_Layer.prefab';
+const OUTPUT_DIR = 'YouleNexus/out/legacy-migration/';
+const OUTPUT = 'YouleNexus/out/legacy-migration/Login_Layer.prefab';
+
+test('Login_Layer 端到端 - 渠道logo _lpos 误差 < 0.001', () => {
+  execSync(`${CLI} ${INPUT} ${TARGET} ${OUTPUT_DIR}`, { stdio: 'pipe' });
+
+  const generated = JSON.parse(readFileSync(OUTPUT, 'utf8'));
+  const expected = JSON.parse(readFileSync(TARGET, 'utf8'));
+
+  // 找渠道logo 节点（_name 包含"渠道"）
+  const genLogo = generated.find(o => o.__type__ === 'cc.Node' && o._name && o._name.includes('渠道'));
+  const expLogo = expected.find(o => o.__type__ === 'cc.Node' && o._name && o._name.includes('渠道'));
+  assert.ok(genLogo, 'generated 缺渠道logo node');
+  assert.ok(expLogo, 'expected 缺渠道logo node');
+  assert.ok(Math.abs(genLogo._lpos.x - expLogo._lpos.x) < 0.001, `x mismatch: gen=${genLogo._lpos.x} exp=${expLogo._lpos.x}`);
+  assert.ok(Math.abs(genLogo._lpos.y - expLogo._lpos.y) < 0.001, `y mismatch: gen=${genLogo._lpos.y} exp=${expLogo._lpos.y}`);
+});
+
+test('Login_Layer 端到端 - 游客登录 _lpos 误差 < 0.001', () => {
+  execSync(`${CLI} ${INPUT} ${TARGET} ${OUTPUT_DIR}`, { stdio: 'pipe' });
+
+  const generated = JSON.parse(readFileSync(OUTPUT, 'utf8'));
+  const expected = JSON.parse(readFileSync(TARGET, 'utf8'));
+
+  const genVisitor = generated.find(o => o.__type__ === 'cc.Node' && o._name && o._name.includes('游客'));
+  const expVisitor = expected.find(o => o.__type__ === 'cc.Node' && o._name && o._name.includes('游客'));
+  assert.ok(genVisitor);
+  assert.ok(expVisitor);
+  assert.ok(Math.abs(genVisitor._lpos.x - expVisitor._lpos.x) < 0.001);
+  assert.ok(Math.abs(genVisitor._lpos.y - expVisitor._lpos.y) < 0.001);
+});