### Question:
InvestorServicesFetchOperations { public List<Investor> fetchAllInvestors() { return InvestorService.investorsList; }  List<Investor> fetchAllInvestors(); Investor fetchInvestorById(String investorId); List<Stock> fetchStocksByInvestorId(String investorId, int offset, int limit); Stock fetchSingleStockByInvestorIdAndStockSymbol(String investorId, String symbol);  }### Answer:
@Test public void testFetchAllInvestors() { int expectedSize = 2; int actualListSize = new InvestorServicesFetchOperations().fetchAllInvestors().size(); assertEquals(expectedSize, actualListSize); }