refactor: 完成全局CSS模块化治理

tools/quality/verify-css-governance.test.mjs

@@ -0,0 +1,33 @@
+import assert from 'node:assert/strict';
+import fs from 'node:fs';
+import os from 'node:os';
+import path from 'node:path';
+import test from 'node:test';
+import { analyzeCss, broadBusinessSelectors, verifyGlobalCssAbsent } from './verify-css-governance.mjs';
+
+test('AST metrics ignore formatting and count selectors and important declarations', () => {
+  assert.deepEqual(analyzeCss('.page { color: red !important; }\n.page a, .page button { display: block; }'), {
+    rules: 2,
+    selectors: 3,
+    declarations: 2,
+    important: 1,
+    selectorList: ['.page', '.page a', '.page button'],
+  });
+});
+
+test('broad business tag selectors are rejected while rooted selectors are allowed', () => {
+  assert.deepEqual(broadBusinessSelectors('button { color: red; } .report-page button { color: blue; }'), ['button']);
+});
+
+test('formatting changes do not affect AST growth metrics', () => {
+  assert.deepEqual(analyzeCss('.page{color:red}'), analyzeCss('.page {\n  color: red;\n}\n'));
+});
+
+test('global.css cannot be recreated after migration', () => {
+  const directory = fs.mkdtempSync(path.join(os.tmpdir(), 'cmpp-css-gate-'));
+  fs.mkdirSync(path.join(directory, 'src/styles'), { recursive: true });
+  assert.doesNotThrow(() => verifyGlobalCssAbsent(directory));
+  fs.writeFileSync(path.join(directory, 'src/styles/global.css'), '.new-page {}');
+  assert.throws(() => verifyGlobalCssAbsent(directory), /禁止重新创建/);
+  fs.rmSync(directory, { recursive: true, force: true });
+});