refactor: organize backend by business responsibility

2026-09-13 13:52:57 +03:00
parent 7fde3ece6e
commit 8ba005346d
145 changed files with 3027 additions and 2346 deletions
@@ -0,0 +1,85 @@
+import { ServiceUnavailableException } from '@nestjs/common';
+import { NcrRatingsClient } from './ncr-ratings.client';
+const isin = 'RU000A10EW44';
+const row = (value = 'AAA.ru', code = isin, href = '/ratings/issues/123/') =>
+  `<tr><td>Эмитент</td><td>Облигация</td><td>${value}</td><td><a href="${href}">${code}</a></td><td>REG</td><td>17.04.2026</td></tr>`;
+const table = (rows: string) =>
+  `<table id="issues-table"><thead><tr><th>Лицо</th><th>Выпуск</th><th>Рейтинг</th><th>ISIN</th><th>Регномер</th><th>Дата</th></tr></thead><tbody>${rows}</tbody></table>`;
+const response = (html: string) =>
+  ({ ok: true, text: () => Promise.resolve(html) }) as Response;
+const cacheClock = performance;
+describe('public NCR issue ratings', () => {
+  beforeEach(() => {
+    jest.useFakeTimers().setSystemTime(new Date('2026-09-10T10:00:00Z'));
+    jest.spyOn(cacheClock, 'now').mockImplementation(() => Date.now());
+  });
+  afterEach(() => {
+    jest.restoreAllMocks();
+    jest.useRealTimers();
+  });
+  it('matches only exact ISIN and shares one public registry download', async () => {
+    const fetchMock = jest
+      .spyOn(global, 'fetch')
+      .mockResolvedValue(response(table(row())));
+    const client = new NcrRatingsClient();
+    const [rating, missing] = await Promise.all([
+      client.rating(isin),
+      client.rating('RU000A1065B1'),
+    ]);
+    expect(rating).toEqual({
+      agency: 'NCR',
+      value: 'AAA.ru',
+      status: 'active',
+      date: '2026-04-17',
+      sourceUrl: 'https://ratings.ru/ratings/issues/123/',
+      observedAt: '2026-09-10T10:00:00.000Z',
+    });
+    expect(missing).toBeNull();
+    expect(await client.rating('issuer-name')).toBeNull();
+    expect(fetchMock).toHaveBeenCalledTimes(1);
+    await jest.advanceTimersByTimeAsync(6 * 60 * 60_000 + 1);
+    await client.rating(isin);
+    expect(fetchMock).toHaveBeenCalledTimes(2);
+  });
+  it('preserves withdrawal and never displays an issuer rating as an issue rating', async () => {
+    jest
+      .spyOn(global, 'fetch')
+      .mockResolvedValue(response(table(row('рейтинг  отозван'))));
+    expect(await new NcrRatingsClient().rating(isin)).toMatchObject({
+      status: 'withdrawn',
+      value: null,
+    });
+  });
+  it.each([
+    '<html>Service unavailable</html>',
+    table(row('AAA.ru', isin, 'https://untrusted.test/')),
+    table(row('unrecognized')),
+    table(row() + row('AA.ru')),
+    table(''),
+  ])(
+    'reports changed or ambiguous registry as unavailable, not unrated',
+    async (html) => {
+      jest.spyOn(global, 'fetch').mockResolvedValue(response(html));
+      await expect(new NcrRatingsClient().rating(isin)).rejects.toBeInstanceOf(
+        ServiceUnavailableException,
+      );
+    },
+  );
+  it('bounds outage retries then recovers without retaining a false missing rating', async () => {
+    const fetchMock = jest
+      .spyOn(global, 'fetch')
+      .mockRejectedValueOnce(new Error('offline'))
+      .mockResolvedValue(response(table(row())));
+    const client = new NcrRatingsClient();
+    await expect(client.rating(isin)).rejects.toBeInstanceOf(
+      ServiceUnavailableException,
+    );
+    await expect(client.rating(isin)).rejects.toBeInstanceOf(
+      ServiceUnavailableException,
+    );
+    expect(fetchMock).toHaveBeenCalledTimes(1);
+    await jest.advanceTimersByTimeAsync(60_001);
+    expect(await client.rating(isin)).toMatchObject({ value: 'AAA.ru' });
+    expect(fetchMock).toHaveBeenCalledTimes(2);
+  });
+});