Feature/vacation edo signing (#23)

Co-authored-by: gorbenko.pavel <gorbenko.pavel@tansu.kz>
Reviewed-on: http://git.tnsu.kz/timur.gorodetskiy/request-portal/pulls/23

src/webparts/requestPortal/shared/dictionary/companiesCache.test.ts

@@ -0,0 +1,90 @@
+import {
+  COMPANIES_CACHE_KEY,
+  COMPANIES_CACHE_TTL_MS,
+  IStorageLike,
+  readCachedCompanies,
+  writeCachedCompanies
+} from './companiesCache';
+import { ICompany } from './models/ICompany';
+
+class MemoryStorage implements IStorageLike {
+  public readonly data = new Map<string, string>();
+  // eslint-disable-next-line @rushstack/no-new-null
+  public getItem(key: string): string | null {
+    return this.data.has(key) ? (this.data.get(key) as string) : null;
+  }
+  public setItem(key: string, value: string): void {
+    this.data.set(key, value);
+  }
+  public removeItem(key: string): void {
+    this.data.delete(key);
+  }
+}
+
+const COMPANIES: ICompany[] = [
+  { Id: '9de064a4-44c8-88ef-11ec-8284930fad96', Name: 'ТОО TANSU Construction', Bin: '021040005165' },
+  { Id: '0a1b2c3d-0000-4000-8000-000000000002', Name: 'ТОО TANSU Строй' }
+];
+
+const NOW = 1_800_000_000_000;
+
+describe('кэш справочника компаний', () => {
+  it('в пустом хранилище кэша нет', () => {
+    expect(readCachedCompanies(new MemoryStorage(), NOW)).toBeUndefined();
+  });
+
+  it('записанное читается обратно, пока не прошло 4 часа', () => {
+    const storage = new MemoryStorage();
+    writeCachedCompanies(storage, COMPANIES, NOW);
+
+    expect(readCachedCompanies(storage, NOW + 1000)).toEqual(COMPANIES);
+    expect(readCachedCompanies(storage, NOW + COMPANIES_CACHE_TTL_MS - 1)).toEqual(COMPANIES);
+  });
+
+  it('через 4 часа кэш устаревает и удаляется', () => {
+    const storage = new MemoryStorage();
+    writeCachedCompanies(storage, COMPANIES, NOW);
+
+    expect(readCachedCompanies(storage, NOW + COMPANIES_CACHE_TTL_MS)).toBeUndefined();
+    expect(storage.data.has(COMPANIES_CACHE_KEY)).toBe(false);
+  });
+
+  it('срок — ровно 4 часа', () => {
+    expect(COMPANIES_CACHE_TTL_MS).toBe(14_400_000);
+  });
+
+  it('запись из будущего (часы переведены назад) не доверяется', () => {
+    const storage = new MemoryStorage();
+    writeCachedCompanies(storage, COMPANIES, NOW + 60_000);
+
+    expect(readCachedCompanies(storage, NOW)).toBeUndefined();
+  });
+
+  it('битый JSON и неожиданная форма — как отсутствующий кэш', () => {
+    const broken = new MemoryStorage();
+    broken.setItem(COMPANIES_CACHE_KEY, '{не json');
+    expect(readCachedCompanies(broken, NOW)).toBeUndefined();
+    expect(broken.data.has(COMPANIES_CACHE_KEY)).toBe(false);
+
+    const wrongShape = new MemoryStorage();
+    wrongShape.setItem(COMPANIES_CACHE_KEY, JSON.stringify({ savedAt: NOW, items: [{ Id: 1 }] }));
+    expect(readCachedCompanies(wrongShape, NOW)).toBeUndefined();
+  });
+
+  it('недоступное хранилище не ломает ни чтение, ни запись', () => {
+    const throwing: IStorageLike = {
+      getItem: () => {
+        throw new Error('запрещено');
+      },
+      setItem: () => {
+        throw new Error('переполнено');
+      },
+      removeItem: () => {
+        throw new Error('запрещено');
+      }
+    };
+
+    expect(readCachedCompanies(throwing, NOW)).toBeUndefined();
+    expect(() => writeCachedCompanies(throwing, COMPANIES, NOW)).not.toThrow();
+  });
+});