fix: translate permanent invalid-token errors on online entrypoints (WealthLedger/backend#59) (#110)

test/stocks.e2e-spec.ts

@@ -1,5 +1,6 @@
 import type { Server } from 'node:http';
 
+import { status } from '@grpc/grpc-js';
 import {
   ConflictException,
   INestApplication,
@@ -17,6 +18,13 @@ import { StockIncomeService } from '../src/modules/investments/instruments/stock
 import { StockMarketService } from '../src/modules/investments/instruments/stocks/application/stock-market.service';
 import { StockScreenerService } from '../src/modules/investments/instruments/stocks/application/stock-screener.service';
 import { TbankHourlyScheduler } from '../src/modules/investments/tbank-sync/tbank-hourly.scheduler';
+import {
+  bootOnlineApp,
+  expectSafeBody,
+  failUpstream,
+  onlineUserId,
+  refusals,
+} from './online-upstream';
 
 const uid = 'e6123145-9665-43e0-8413-cd61b8aa9b13';
 describe('Stock HTTP contract', () => {
@@ -201,3 +209,40 @@ describe('Stock HTTP contract', () => {
     expect(response.body).not.toHaveProperty('stack');
   });
 });
+
+// Real services and TbankClient error mapping; only the gRPC transport is stubbed.
+describe('Stock online reads: upstream failure translation', () => {
+  const rpc = jest.fn();
+  let ctx: Awaited<ReturnType<typeof bootOnlineApp>>;
+  const get = (path: string) => request(ctx.app.getHttpServer()).get(path);
+  // [entrypoint, request, RPC that fails second]: a failure after the first call must translate too.
+  const entrypoints: [string, () => request.Test, string][] = [
+    ['search', () => get('/api/v1/stocks?query=SBER'), 'getLastPrices'],
+    ['detail', () => get(`/api/v1/stocks/${uid}`), 'shareBy'],
+    ['ticker', () => get('/api/v1/stocks/by-ticker/SBER'), 'shareBy'],
+    ['company', () => get(`/api/v1/stocks/${uid}/company`), 'getAssetBy'],
+    ['screener', () => request(ctx.app.getHttpServer()).post('/api/v1/stocks/screener/search').send({}), 'shares'],
+  ];
+  const cases = entrypoints.flatMap(([name, send, later]) =>
+    refusals.flatMap((code) => [undefined, later].map((at) => [name, code, at, send] as const)),
+  );
+
+  beforeAll(async () => {
+    ctx = await bootOnlineApp(rpc);
+  });
+  afterAll(() => ctx.app.close());
+
+  it.each(cases)('%s: upstream auth refusal %s (failing RPC %s) becomes 400/INVALID_TBANK_TOKEN', async (_name, code, at, send) => {
+    failUpstream(rpc, 'share', code, at);
+    const response = await send().set('Authorization', ctx.bearer).expect(400);
+    expectSafeBody(response.body, 400, 'INVALID_TBANK_TOKEN');
+    const saved = await ctx.prisma.tbankConnection.findUniqueOrThrow({ where: { userId: onlineUserId } });
+    expect(saved).toMatchObject({ invalidToken: false, revision: ctx.connection.revision });
+  });
+
+  it.each(entrypoints)('%s: temporary unavailability stays 503/TBANK_UNAVAILABLE', async (_name, send) => {
+    failUpstream(rpc, 'share', status.UNAVAILABLE);
+    const response = await send().set('Authorization', ctx.bearer).expect(503);
+    expectSafeBody(response.body, 503, 'TBANK_UNAVAILABLE');
+  });
+});