Initial import of zappier-edge from zapier monorepo

tests/db-pricing.test.ts

@@ -0,0 +1,63 @@
+import Database from 'better-sqlite3';
+import { SqlitePricingStore } from '../src/db/pricing-store';
+
+describe('SqlitePricingStore', () => {
+  it('seeds the default rate card and tiers when empty', () => {
+    const store = new SqlitePricingStore(new Database(':memory:'));
+    expect(store.getRateCard().endpoints.transform).toEqual({ kind: 'fixed', fixedCents: 4 });
+    expect(store.getTiers().map((t) => t.id)).toEqual(['free', 'pro', 'business']);
+  });
+
+  it('seeds only once', () => {
+    const db = new Database(':memory:');
+    const first = new SqlitePricingStore(db);
+    first.deleteEndpoint('transform');
+    const second = new SqlitePricingStore(db);
+    expect(second.getRateCard().endpoints.transform).toBeUndefined();
+  });
+
+  it('reseeds endpoints without reverting admin tier edits', () => {
+    const db = new Database(':memory:');
+    const first = new SqlitePricingStore(db);
+    for (const id of Object.keys(first.getRateCard().endpoints)) {
+      first.deleteEndpoint(id);
+    }
+    first.upsertTier({ id: 'pro', name: 'Pro', multiplier: 0.9, monthlyCreditCents: 1000 });
+    const second = new SqlitePricingStore(db);
+    expect(second.getRateCard().endpoints.transform).toBeDefined();
+    expect(second.getTiers().find((t) => t.id === 'pro')?.multiplier).toBe(0.9);
+  });
+
+  it('upserts and deletes endpoints', () => {
+    const store = new SqlitePricingStore(new Database(':memory:'));
+    store.upsertEndpoint('experimental', { kind: 'variable', baseCents: 3, perKbCents: 2, perMbCents: 20 });
+    expect(store.getRateCard().endpoints.experimental).toEqual({
+      kind: 'variable',
+      baseCents: 3,
+      perKbCents: 2,
+      perMbCents: 20,
+    });
+    store.deleteEndpoint('experimental');
+    expect(store.getRateCard().endpoints.experimental).toBeUndefined();
+  });
+
+  it('upserts tiers including default rules, and deletes them', () => {
+    const store = new SqlitePricingStore(new Database(':memory:'));
+    store.upsertTier({
+      id: 'edu',
+      name: 'Education',
+      multiplier: 0.4,
+      monthlyCreditCents: 500,
+      defaultRule: { kind: 'fixed', fixedCents: 6 },
+    });
+    expect(store.getTiers().find((t) => t.id === 'edu')?.defaultRule).toEqual({
+      kind: 'fixed',
+      fixedCents: 6,
+    });
+    store.upsertTier({ id: 'edu', name: 'Education', multiplier: 0.3, monthlyCreditCents: 500 });
+    expect(store.getTiers().filter((t) => t.id === 'edu')).toHaveLength(1);
+    expect(store.getTiers().find((t) => t.id === 'edu')?.multiplier).toBe(0.3);
+    store.deleteTier('edu');
+    expect(store.getTiers().find((t) => t.id === 'edu')).toBeUndefined();
+  });
+});