feat(小宝预警): 增加趋势与解读缓存

apps/web/lib/xiaobao-risk-cache.test.ts

@@ -0,0 +1,70 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import type { XiaobaoRiskSnapshot } from './xiaobao-risk-trend';
+import {
+  findCachedInsight,
+  upsertDailySnapshot,
+  upsertInsight,
+  type XiaobaoRiskInsightCacheItem,
+} from './xiaobao-risk-cache';
+
+const insightA: XiaobaoRiskInsightCacheItem = {
+  versionId: 'v-1',
+  riskSignature: 'sig-a',
+  insight: {
+    summary: '版本风险上升',
+    why: ['剩余工作较多'],
+    forecast: '可能延期 2 天',
+    suggestedActions: ['压缩低优先级范围'],
+    ownerHints: ['请项目负责人确认排期'],
+    generatedAt: '2026-06-29T08:00:00.000Z',
+  },
+  generatedAt: '2026-06-29T08:00:00.000Z',
+};
+
+test('findCachedInsight returns matching signature only', () => {
+  const rows: XiaobaoRiskInsightCacheItem[] = [
+    insightA,
+    { ...insightA, versionId: 'v-2', riskSignature: 'sig-a' },
+    { ...insightA, versionId: 'v-1', riskSignature: 'sig-b' },
+  ];
+
+  assert.equal(findCachedInsight(rows, 'v-1', 'sig-a'), insightA);
+  assert.equal(findCachedInsight(rows, 'v-1', 'sig-b')?.versionId, 'v-1');
+  assert.equal(findCachedInsight(rows, 'v-2', 'sig-b'), undefined);
+});
+
+test('upsertDailySnapshot keeps one snapshot per version and date', () => {
+  const existing: XiaobaoRiskSnapshot = {
+    versionId: 'v-1',
+    date: '2026-06-29',
+    riskScore: 40,
+    riskLevel: 'attention',
+    openBugCount: 1,
+    failedTestCount: 0,
+    blockedCount: 0,
+    silentRiskCount: 0,
+    confidence: 80,
+    createdAt: '2026-06-29T08:00:00.000Z',
+  };
+  const replacement: XiaobaoRiskSnapshot = { ...existing, riskScore: 72, createdAt: '2026-06-29T09:00:00.000Z' };
+  const otherDay: XiaobaoRiskSnapshot = { ...existing, date: '2026-06-28', createdAt: '2026-06-28T09:00:00.000Z' };
+
+  const result = upsertDailySnapshot([existing, otherDay], replacement);
+
+  assert.deepEqual(result, [replacement, otherDay]);
+});
+
+test('upsertInsight replaces existing version signature pair', () => {
+  const replacement: XiaobaoRiskInsightCacheItem = {
+    ...insightA,
+    insight: { ...insightA.insight, summary: '已重新生成' },
+    generatedAt: '2026-06-29T09:00:00.000Z',
+  };
+  const otherSignature: XiaobaoRiskInsightCacheItem = { ...insightA, riskSignature: 'sig-b' };
+  const otherVersion: XiaobaoRiskInsightCacheItem = { ...insightA, versionId: 'v-2' };
+
+  const result = upsertInsight([insightA, otherSignature, otherVersion], replacement);
+
+  assert.deepEqual(result, [replacement, otherSignature, otherVersion]);
+});