feat(小宝预警): 增加日报证据与风险趋势

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

@@ -0,0 +1,40 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+
+import { buildRiskSignature, summarizeRiskTrend } from './xiaobao-risk-trend';
+import type { XiaobaoRiskSnapshot } from './xiaobao-risk-trend';
+
+function snapshot(patch: Partial<XiaobaoRiskSnapshot>): XiaobaoRiskSnapshot {
+  return {
+    versionId: 'ver-1',
+    date: '2026-06-27',
+    riskScore: 38,
+    riskLevel: 'attention',
+    openBugCount: 0,
+    failedTestCount: 0,
+    blockedCount: 0,
+    silentRiskCount: 0,
+    confidence: 80,
+    createdAt: '2026-06-27T01:00:00.000Z',
+    ...patch,
+  };
+}
+
+test('summarizeRiskTrend detects continuous rising risk across three snapshots', () => {
+  const trend = summarizeRiskTrend([
+    snapshot({ riskScore: 71, createdAt: '2026-06-29T01:00:00.000Z', date: '2026-06-29' }),
+    snapshot({ riskScore: 38, createdAt: '2026-06-27T01:00:00.000Z', date: '2026-06-27' }),
+    snapshot({ riskScore: 52, createdAt: '2026-06-28T01:00:00.000Z', date: '2026-06-28' }),
+  ]);
+
+  assert.equal(trend.direction, 'up');
+  assert.equal(trend.delta, 33);
+  assert.equal(trend.pattern, 'continuous_rising');
+});
+
+test('buildRiskSignature changes when score and bug counts change', () => {
+  const base = buildRiskSignature(snapshot({ riskScore: 52, openBugCount: 1 }));
+  const changed = buildRiskSignature(snapshot({ riskScore: 71, openBugCount: 2 }));
+
+  assert.notEqual(base, changed);
+});