public LoanProcessor()
 {
     eligibilityChecker = new EligibilityChecker();
     currencyConverter  = new CurrencyConverter();
     currencyConverter.DownloadCurrentRates();
     eligibilityChecker.CurrentRates = currencyConverter.Rates;
 }
 // constructor for testing
 public LoanProcessor(EligibilityChecker eligibilityChecker, CurrencyConverter currencyConverter)
 {
     this.eligibilityChecker = eligibilityChecker;
     this.currencyConverter  = currencyConverter;
 }