Add support for converting NSTimeInterval double in secs to TimeSpan

Author: mythz

src/ServiceStack.Text/Common/DateTimeSerializer.cs

@@ -349,7 +349,15 @@ public static TimeSpan ParseTimeSpan(string dateTimeStr)
         {
             return dateTimeStr.StartsWith("P", StringComparison.Ordinal) || dateTimeStr.StartsWith("-P", StringComparison.Ordinal)
                 ? ParseXsdTimeSpan(dateTimeStr)
-                : TimeSpan.Parse(dateTimeStr);
+                : dateTimeStr.Contains(":") 
+                ? TimeSpan.Parse(dateTimeStr)
+                : ParseNSTimeInterval(dateTimeStr);
+        }
+
+        public static TimeSpan ParseNSTimeInterval(string doubleInSecs)
+        {
+            var secs = double.Parse(doubleInSecs);
+            return TimeSpan.FromSeconds(secs);
         }
 
         public static TimeSpan ParseXsdTimeSpan(string dateTimeStr)

tests/ServiceStack.Text.Tests/Utils/DateTimeSerializerTests.cs

@@ -591,4 +591,35 @@ public void Can_handle_invalid_format_Exceptions()
         }
     }
 
+
+    [TestFixture]
+    public class TimeSpanTests
+    {
+        static readonly TimeSpan Time1Y1M1H1S1MS = TimeSpan.FromDays(365)
+                .Add(TimeSpan.FromHours(1))
+                .Add(TimeSpan.FromMinutes(1))
+                .Add(TimeSpan.FromSeconds(1))
+                .Add(TimeSpan.FromMilliseconds(1));
+
+        [Test]
+        public void Can_Parse_XSD_Times()
+        {
+            Assert.That("P365D".FromJson<TimeSpan>(), Is.EqualTo(TimeSpan.FromDays(365)));
+            Assert.That("P365DT1H1M1.001S".FromJson<TimeSpan>(), Is.EqualTo(Time1Y1M1H1S1MS));
+        }
+
+        [Test]
+        public void Can_Parse_TimeSpan_Strings()
+        {
+            Assert.That("365.00:00:00".FromJson<TimeSpan>(), Is.EqualTo(TimeSpan.FromDays(365)));
+            Assert.That("365.01:01:01.001".FromJson<TimeSpan>(), Is.EqualTo(Time1Y1M1H1S1MS));
+        }
+
+        [Test]
+        public void Can_Parse_TimeSpan_NSTimeSpan()
+        {
+            Assert.That("31536000".FromJson<TimeSpan>(), Is.EqualTo(TimeSpan.FromDays(365)));
+            Assert.That("31539661.001".FromJson<TimeSpan>(), Is.EqualTo(Time1Y1M1H1S1MS));
+        }
+    }
 }