Replaced (float) cast with sprintf('%.14F', ...), as it is more p…

…recise

Ref: #634 (comment)

src/Exchange/ExchangerExchange.php

@@ -13,6 +13,10 @@
 use Money\Exception\UnresolvableCurrencyPairException;
 use Money\Exchange;
 
+use function assert;
+use function is_numeric;
+use function sprintf;
+
 /**
  * Provides a way to get exchange rate from a third-party source and return a currency pair.
  */
@@ -36,6 +40,10 @@ public function quote(Currency $baseCurrency, Currency $counterCurrency): Curren
             throw UnresolvableCurrencyPairException::createFromCurrencies($baseCurrency, $counterCurrency);
         }
 
-        return new CurrencyPair($baseCurrency, $counterCurrency, (string) $rate->getValue());
+        $rateValue = sprintf('%.14F', $rate->getValue());
+
+        assert(is_numeric($rateValue));
+
+        return new CurrencyPair($baseCurrency, $counterCurrency, $rateValue);
     }
 }

tests/Exchange/ExchangerExchangeTest.php

@@ -36,7 +36,7 @@ public function it_exchanges_currencies(): void
 
         self::assertEquals($base, $currencyPair->getBaseCurrency());
         self::assertEquals($counter, $currencyPair->getCounterCurrency());
-        self::assertEquals('1.12', $currencyPair->getConversionRatio());
+        self::assertEquals('1.12000000000000', $currencyPair->getConversionRatio());
     }
 
     /** @test */