feat: add stock screener

src/integrations/tbank/tbank.client.spec.ts

@@ -282,3 +282,141 @@ describe('TbankClient metadata retries', () => {
     expect(jest.getTimerCount()).toBe(0);
   });
 });
+
+describe('TbankClient share catalog', () => {
+  const token = 'token';
+  const catalogSize = 40;
+  let client: TbankClient;
+  let call: jest.Mock;
+  let logger: {
+    event: jest.Mock<void, [string, string, Record<string, number | string>]>;
+  };
+
+  beforeEach(() => {
+    call = jest.fn();
+    logger = {
+      event: jest.fn<void, [string, string, Record<string, number | string>]>(),
+    };
+    client = Object.assign(
+      Object.create(TbankClient.prototype) as TbankClient,
+      { call, logger },
+    );
+  });
+
+  it('fetches the full share catalog through Shares with INSTRUMENT_STATUS_ALL', async () => {
+    const instruments = [{ ticker: 'AFLT', uid: 'uid-aflt' }];
+    call.mockResolvedValue({ instruments });
+
+    await expect(client.getAllShares(token)).resolves.toEqual(instruments);
+    expect(call).toHaveBeenCalledWith('token', undefined, 'shares', {
+      instrumentStatus: 'INSTRUMENT_STATUS_ALL',
+    });
+  });
+
+  it('returns the whole catalog including a fitting instrument beyond the first 30 text matches', async () => {
+    const catalog = Array.from({ length: catalogSize }, (_, index) => {
+      const fitting = index === catalogSize - 1;
+      return {
+        apiTradeAvailableFlag: fitting,
+        buyAvailableFlag: fitting,
+        ticker: fitting ? 'FIT' : `T${index}`,
+        uid: fitting ? 'uid-fit' : `uid-${index}`,
+      };
+    });
+    call.mockResolvedValue({ instruments: catalog });
+
+    const shares = await client.getAllShares(token);
+
+    expect(shares).toEqual(catalog);
+    expect(shares).toHaveLength(catalogSize);
+    expect(shares).toContainEqual({
+      apiTradeAvailableFlag: true,
+      buyAvailableFlag: true,
+      ticker: 'FIT',
+      uid: 'uid-fit',
+    });
+  });
+
+  it('rejects when the source refuses instead of returning an empty success', async () => {
+    const error = new ServiceUnavailableException({
+      code: 'TBANK_UNAVAILABLE',
+    });
+    call.mockRejectedValue(error);
+
+    await expect(client.getAllShares(token)).rejects.toBe(error);
+  });
+
+  it('rejects when the response carries no instrument list', async () => {
+    call.mockResolvedValue({});
+
+    await expect(client.getAllShares(token)).rejects.toBeInstanceOf(
+      ServiceUnavailableException,
+    );
+  });
+
+  it('rejects an empty instrument list with the public unavailable code', async () => {
+    call.mockResolvedValue({ instruments: [] });
+
+    const failure = await client
+      .getAllShares(token)
+      .catch((error: unknown) => error);
+
+    expect(failure).toBeInstanceOf(ServiceUnavailableException);
+    expect((failure as ServiceUnavailableException).getResponse()).toEqual({
+      code: 'TBANK_UNAVAILABLE',
+    });
+  });
+
+  it('rejects a non-list instrument payload as uninterpretable', async () => {
+    call.mockResolvedValue({ instruments: 'corrupted' });
+
+    await expect(client.getAllShares(token)).rejects.toBeInstanceOf(
+      ServiceUnavailableException,
+    );
+  });
+
+  it('rejects an uninterpretable entry without instrument identity', async () => {
+    call.mockResolvedValue({
+      instruments: [
+        { ticker: 'FIT', uid: 'uid-fit' },
+        { ticker: 'BROKEN' },
+      ],
+    });
+
+    await expect(client.getAllShares(token)).rejects.toBeInstanceOf(
+      ServiceUnavailableException,
+    );
+  });
+
+  it('registers asOf and source instrument count on a successful catalog fetch', async () => {
+    call.mockResolvedValue({
+      instruments: [{ uid: 'uid-a' }, { uid: 'uid-b' }],
+    });
+
+    await client.getAllShares(token);
+
+    expect(logger.event).toHaveBeenCalledWith(
+      'info',
+      'tbank.shares.catalog.fetched',
+      expect.objectContaining({ count: 2, operation: 'shares' }),
+    );
+    expect(logger.event.mock.calls[0][2].asOf).toEqual(expect.any(String));
+  });
+
+  it('logs a distinguishable failure without secrets when the catalog is unusable', async () => {
+    call.mockResolvedValue({ instruments: [] });
+
+    await expect(client.getAllShares('secret-token')).rejects.toBeInstanceOf(
+      ServiceUnavailableException,
+    );
+
+    expect(logger.event).toHaveBeenCalledWith(
+      'error',
+      'tbank.shares.catalog.unusable',
+      expect.objectContaining({ operation: 'shares' }),
+    );
+    expect(JSON.stringify(logger.event.mock.calls)).not.toContain(
+      'secret-token',
+    );
+  });
+});