Rebuild company overview analysis page

lib/server/sec-company-profile.test.ts

@@ -0,0 +1,67 @@
+import { describe, expect, it } from 'bun:test';
+import { __secCompanyProfileInternals, deriveValuationSnapshot } from './sec-company-profile';
+
+describe('sec company profile helpers', () => {
+  it('formats fiscal year end values', () => {
+    expect(__secCompanyProfileInternals.formatFiscalYearEnd('0630')).toBe('06/30');
+    expect(__secCompanyProfileInternals.formatFiscalYearEnd('1231')).toBe('12/31');
+    expect(__secCompanyProfileInternals.formatFiscalYearEnd('')).toBeNull();
+  });
+
+  it('picks the latest numeric fact across supported namespaces', () => {
+    const payload = {
+      facts: {
+        dei: {
+          EntityCommonStockSharesOutstanding: {
+            units: {
+              shares: [
+                { val: 7_400_000_000, filed: '2025-10-31' },
+                { val: 7_500_000_000, filed: '2026-01-31' }
+              ]
+            }
+          }
+        }
+      }
+    };
+
+    expect(
+      __secCompanyProfileInternals.pickLatestNumericFact(
+        payload,
+        ['dei'],
+        ['EntityCommonStockSharesOutstanding']
+      )
+    ).toBe(7_500_000_000);
+  });
+
+  it('derives valuation metrics from free inputs only', () => {
+    const snapshot = deriveValuationSnapshot({
+      quote: 200,
+      sharesOutstanding: 1_000_000,
+      revenue: 50_000_000,
+      cash: 5_000_000,
+      debt: 15_000_000,
+      netIncome: 10_000_000
+    });
+
+    expect(snapshot.marketCap).toBe(200_000_000);
+    expect(snapshot.enterpriseValue).toBe(210_000_000);
+    expect(snapshot.evToRevenue).toBe(4.2);
+    expect(snapshot.trailingPe).toBe(20);
+    expect(snapshot.source).toBe('derived');
+  });
+
+  it('marks valuation as unavailable when core inputs are missing', () => {
+    const snapshot = deriveValuationSnapshot({
+      quote: null,
+      sharesOutstanding: null,
+      revenue: null,
+      cash: null,
+      debt: null,
+      netIncome: null
+    });
+
+    expect(snapshot.marketCap).toBeNull();
+    expect(snapshot.enterpriseValue).toBeNull();
+    expect(snapshot.source).toBe('unavailable');
+  });
+});