更新换行算法和APP-PUSH

client/src/features/textWrap/grapheme/__tests__/segmentGraphemes.test.ts

@@ -0,0 +1,65 @@
+import { describe, expect, it } from 'vitest';
+
+import { segmentGraphemes } from '../index';
+
+const REQUIRED_SINGLE_CLUSTER_CASES: Array<{ name: string; input: string }> = [
+  { name: 'ZWJ family', input: '👨‍👩‍👧‍👦' },
+  { name: 'flag', input: '🇸🇬' },
+  { name: 'skin tone', input: '👍🏽' },
+  { name: 'ZWJ + variation', input: '😮‍💨' },
+  { name: 'combining mark', input: 'e\u0301' }, // é（组合形式）
+];
+
+describe('textWrap grapheme-segmentation', () => {
+  it('基础性质：空字符串 -> []', () => {
+    const out = segmentGraphemes('', 'PREFERRED');
+    expect(out.clusters).toEqual([]);
+    expect(out.clusters.join('')).toBe('');
+  });
+
+  it('基础性质：可逆性（clusters.join("") === input）', () => {
+    const input = '我好累😮‍💨';
+    const out = segmentGraphemes(input, 'PREFERRED');
+    expect(out.clusters.join('')).toBe(input);
+  });
+
+  it('基础性质：确定性（同输入同输出）', () => {
+    const input = '👨‍👩‍👧‍👦🇸🇬👍🏽😮‍💨e\u0301';
+    const a = segmentGraphemes(input, 'PREFERRED');
+    const b = segmentGraphemes(input, 'PREFERRED');
+    expect(a).toEqual(b);
+  });
+
+  it('必测样例：在 PREFERRED 下必须“不拆”为单个 cluster', () => {
+    for (const c of REQUIRED_SINGLE_CLUSTER_CASES) {
+      const out = segmentGraphemes(c.input, 'PREFERRED');
+      expect(out.clusters.join('')).toBe(c.input);
+      expect(out.clusters.length).toBe(1);
+      expect(out.clusters[0]).toBe(c.input);
+    }
+  });
+
+  it('必测样例：在强制 FALLBACK 下必须“不拆”为单个 cluster', () => {
+    for (const c of REQUIRED_SINGLE_CLUSTER_CASES) {
+      const out = segmentGraphemes(c.input, 'FALLBACK');
+      expect(out.meta.strategy).toBe('FALLBACK');
+      expect(out.meta.hadFallback).toBe(true);
+      expect(out.clusters.join('')).toBe(c.input);
+      expect(out.clusters.length).toBe(1);
+      expect(out.clusters[0]).toBe(c.input);
+    }
+  });
+
+  it('跨策略一致性：若 Intl.Segmenter 可用，则 PREFERRED 与 FALLBACK 输出应一致', () => {
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    const hasIntl = typeof (globalThis as any)?.Intl?.Segmenter === 'function';
+    if (!hasIntl) return;
+
+    for (const c of REQUIRED_SINGLE_CLUSTER_CASES) {
+      const preferred = segmentGraphemes(c.input, 'PREFERRED');
+      const fallback = segmentGraphemes(c.input, 'FALLBACK');
+      expect(preferred.clusters).toEqual(fallback.clusters);
+    }
+  });
+});
+