anchor.diff:        var fixed_side = 'buy';
         var amount = '40.00';
   
  -      await cc.authApi.authenticate();
         var result = await cc.ratesApi.detailed(buyCurrency, sellCurrency, fixed_side, amount);
   
         expect(result['client_buy_currency'], buyCurrency);
  
positive.code:       var amount = money.amountAsString;
        var termAgreement = true;
  
        await cc.authApi.authenticate();
        var conversion =
            await cc.conversionApi.create(buyCurrency, sellCurrency, fixedSide, amount, reason, termAgreement);
        var beneficiary = await cc.beneficiariesApi
  
negative.code:       var reason = 'whatever';
        var termAgreement = true;
  
        var result = await cc.conversionApi.create(buyCurrency, sellCurrency, fixed_side, amount, reason, termAgreement);
  
        expect(result['buy_currency'], buyCurrency);
  