Fix value parsing for DateTime and double

CHANGELOG.md

@@ -5,6 +5,7 @@
 * ADDED: User defined location for the static files (including SPAs)
 * ADDED: Console parameter for help and version
 * FIXED: Adding to the empty collection will use the value of the id-field if it is set
+* FIXED: Value parsing for DateTime and double to culture invariant
 
 ### [0.8.0] - 2018-10-14
 * Release as a dotnet tool

FakeServer.Test/ObjectHelperTests.cs

@@ -44,7 +44,7 @@ public void WebSocketMessage()
             Assert.Equal("POST", msg.Method.Value);
         }
 
-        [Fact(Skip = "DateTime parsing fails when current culture is not en-US")]
+        [Fact]
         public void GetValueAsCorrectType()
         {
             Assert.IsType<int>(ObjectHelper.GetValueAsCorrectType("2"));

FakeServer/Common/ObjectHelper.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Dynamic;
+using System.Globalization;
 using System.Linq;
 
 namespace FakeServer.Common
@@ -116,8 +117,8 @@ private static dynamic ParseFields(ExpandoObject s, IEnumerable<string> fields)
         {
             x => Convert.ToBoolean(x),
             x => Convert.ToInt32(x),
-            x => Convert.ToDouble(x),
-            x => Convert.ToDateTime(x)
+            x => double.TryParse(x, NumberStyles.Any, CultureInfo.InvariantCulture, out var result) ? result : throw new Exception(),
+            x => DateTime.Parse(x, CultureInfo.InvariantCulture)
         };
 
         /// <summary>