Merge pull request #182 from commercetools/Fix-AmountToDecimal

Fix AmountToDecimal fraction digits issue

Author: MicheleRezk

commercetools.Sdk/Tests/commercetools.Sdk.Domain.Tests/MoneyTest.cs

@@ -8,7 +8,7 @@ public class MoneyTest
         [Fact]
         public void MoneyToDecimal()
         {
-            var m = new Money() { CurrencyCode = "EUR", CentAmount = 123456 };
+            var m = new Money() { CurrencyCode = "EUR", CentAmount = 123456};
             decimal expect = 1234.56M;
             Assert.Equal(expect, m.AmountToDecimal());
         }

commercetools.Sdk/Tests/commercetools.Sdk.Serialization.Tests/MoneySerializationTests.cs

@@ -102,5 +102,23 @@ public void DeserializeInvalidMoney()
             var exception = Assert.Throws<JsonSerializationException>(() => serializerService.Deserialize<BaseMoney>(serialized));
             Assert.Equal("Unknown money type: {\"type\":\"unknown\",\"centAmount\":123456}", exception.Message);
         }
+        
+        [Fact]
+        public void MoneyDeserializationWithZeroFractionDigits()
+        {
+            ISerializerService serializerService = this.serializationFixture.SerializerService;
+            string serialized = @"{
+                ""type"": ""centPrecision"",
+                ""currencyCode"": ""KRW"",
+                ""centAmount"": 60500,
+                ""fractionDigits"": 0
+            }";
+            var deserialized = serializerService.Deserialize<BaseMoney>(serialized);
+            Assert.IsType<Money>(deserialized);
+            Assert.Equal("KRW", deserialized.CurrencyCode);
+            Assert.Equal(MoneyType.CentPrecision, deserialized.Type);
+            Assert.Equal(0, deserialized.FractionDigits);
+            Assert.Equal(60500M, deserialized.AmountToDecimal());
+        }
     }
 }

commercetools.Sdk/commercetools.Sdk.Domain/Common/Money.cs

@@ -12,7 +12,7 @@ public class Money : BaseMoney
 
         public override decimal AmountToDecimal()
         {
-            return (decimal)CentAmount / 100M;
+            return CentAmount / (decimal) Math.Pow(10, FractionDigits ?? 2);
         }
 
         [Obsolete("will be replaced by more resilient implementation")]