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

test/online-upstream.ts

@@ -0,0 +1,87 @@
+import type { Server } from 'node:http';
+
+import { status } from '@grpc/grpc-js';
+import { INestApplication } from '@nestjs/common';
+import { JwtService } from '@nestjs/jwt';
+import { Test } from '@nestjs/testing';
+
+import { AppModule } from '../src/app.module';
+import { TbankTokenService } from '../src/integrations/tbank/tbank-token.service';
+import { TbankClient } from '../src/integrations/tbank/tbank.client';
+import { configureApp } from '../src/main';
+import { TbankHourlyScheduler } from '../src/modules/investments/tbank-sync/tbank-hourly.scheduler';
+import { PrismaService } from '../src/prisma/prisma.service';
+
+export const onlineUserId = 'online-reader';
+export const onlineToken = 'synthetic-online-token';
+export const rawUpstreamText = 'raw upstream refusal text';
+export const refusals = [status.UNAUTHENTICATED, status.PERMISSION_DENIED];
+
+// Real TbankClient with only the transport stubbed: the gRPC status goes through its real error mapping.
+export async function bootOnlineApp(rpc: jest.Mock) {
+  const upstream = Object.assign(Object.create(TbankClient.prototype) as TbankClient, {
+    logger: { event: jest.fn() },
+    queue: { run: (operation: () => Promise<unknown>) => operation(), size: 0 },
+    request: rpc,
+  });
+  const module = await Test.createTestingModule({ imports: [AppModule] })
+    .overrideProvider(TbankClient)
+    .useValue(upstream)
+    .overrideProvider(TbankHourlyScheduler)
+    .useValue({ tick: jest.fn() })
+    .compile();
+  const app: INestApplication<Server> = module.createNestApplication();
+  configureApp(app);
+  await app.init();
+  await app.listen(0, '127.0.0.1');
+  const prisma = app.get(PrismaService);
+  await prisma.user.create({
+    data: { id: onlineUserId, email: 'online@example.invalid', passwordHash: 'synthetic' },
+  });
+  const connection = await prisma.tbankConnection.create({
+    data: {
+      userId: onlineUserId,
+      encryptedToken: app.get(TbankTokenService).encrypt(onlineToken),
+      connectedAt: new Date(),
+    },
+  });
+  const bearer = `Bearer ${new JwtService().sign(
+    { sub: onlineUserId, type: 'access' },
+    { secret: process.env.JWT_SECRET },
+  )}`;
+  return { app, bearer, connection, prisma };
+}
+
+// Healthy answers for every RPC an online entrypoint uses; `at` picks the single RPC that fails.
+export function failUpstream(rpc: jest.Mock, kind: 'bond' | 'share', code: number, at?: string) {
+  const instrument = {
+    apiTradeAvailableFlag: true,
+    assetUid: 'asset-uid',
+    instrumentKind: kind === 'bond' ? 'INSTRUMENT_TYPE_BOND' : 'INSTRUMENT_TYPE_SHARE',
+    ticker: 'SBER',
+    uid: 'e6123145-9665-43e0-8413-cd61b8aa9b13',
+  };
+  const healthy = new Map<string, unknown>([
+    ['bondBy', { instrument }],
+    ['findInstrument', { instruments: [instrument] }],
+    ['getAssetBy', { asset: { description: 'description' } }],
+    ['getAssetFundamentals', { fundamentals: [] }],
+    ['getLastPrices', { lastPrices: [] }],
+    ['shareBy', { instrument }],
+  ]);
+  const failure = Object.assign(new Error('grpc failure'), {
+    code,
+    details: `${rawUpstreamText} Bearer ${onlineToken}`,
+  });
+  rpc.mockReset();
+  rpc.mockImplementation((_token: string, _client: unknown, method: string) =>
+    !at || method === at ? Promise.reject(failure) : Promise.resolve(healthy.get(method) ?? {}),
+  );
+}
+
+// Safe public error: stable code only, no upstream text, no credentials.
+export function expectSafeBody(body: unknown, status: number, code: string) {
+  expect(body).toEqual({ code, status });
+  expect(JSON.stringify(body)).not.toContain(rawUpstreamText);
+  expect(JSON.stringify(body)).not.toContain(onlineToken);
+}