Support guid and enum serialization

Liquid.NET.Tests/Utils/LiquidValueConverterTests.cs

@@ -123,6 +123,29 @@ public void It_Should_Covert_A_DateTime()
             Assert.Equal(new LiquidDate(dateTime), val.Value);
         }
 
+        [Fact]
+        public void It_Should_Convert_Guid_To_LiquidString()
+        {
+            var guid = Guid.NewGuid();
+            var val = _converter.Convert(guid);
+
+            Assert.True(val.HasValue);
+            Assert.IsType<LiquidString>(val.Value);
+            Assert.Equal(LiquidString.Create(guid.ToString("D")), val.Value);
+        }
+
+        enum TestEnum { One, Two, Three }
+        [Fact]
+        public void It_Should_Convert_Enum_To_LiquidString()
+        {
+            var testEnum = TestEnum.One;
+            var val = _converter.Convert(testEnum);
+
+            Assert.True(val.HasValue);
+            Assert.IsType<LiquidString>(val.Value);
+            Assert.Equal(LiquidString.Create(Enum.GetName(testEnum.GetType(), testEnum)), val.Value);
+        }
+
         [Fact]
         public void It_Should_Convert_Generic_List_To_Collection()
         {

Liquid.NET/src/Utils/LiquidValueConverter.cs

@@ -130,6 +130,21 @@ private Option<ILiquidValue> FromPrimitive(Object obj)
                 var val = obj as IDictionary;
                 return CreateHash(val);
             }
+
+            if (IsGuid(obj))
+            {
+                var val = obj as Guid?;
+                if (val.HasValue)
+                {
+                    return LiquidString.Create(val.Value.ToString("D"));
+                }
+            }
+
+            if (IsEnum(obj))
+            {
+                return LiquidString.Create(Enum.GetName(obj.GetType(), obj));
+            }
+
             return null;
         }
 
@@ -172,6 +187,16 @@ private bool IsList(Object value)
             return value is IList;
         }
 
+        private bool IsGuid(Object value)
+        {
+            return value is Guid;
+        }
+
+        public bool IsEnum(Object value)
+        {
+            return value is Enum;
+        }
+
         // http://stackoverflow.com/questions/1130698/checking-if-an-object-is-a-number-in-c-sharp#answer-1130705
         private bool IsInt32Like(object value)
         {