Throw ANE when SetProperty is called null property name

Author: niemyjski

src/Exceptionless/Extensions/DataDictionaryExtensions.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using Exceptionless.Dependency;
@@ -40,6 +40,9 @@ public static T GetValue<T>(this DataDictionary items, string key, IJsonSerializ
         /// ExceptionlessClient.Default.
         /// </param>
         public static void SetProperty(this IData target, string name, object value, int? maxDepth = null, IEnumerable<string> excludedPropertyNames = null, bool ignoreSerializationErrors = false, ExceptionlessClient client = null) {
+            if (String.IsNullOrEmpty(name))
+                throw new ArgumentNullException(nameof(name));
+            
             AddObject(target, value, name, maxDepth, excludedPropertyNames, ignoreSerializationErrors, client);
         }
 

test/Exceptionless.Tests/Configuration/DataExclusionTests.cs

@@ -7,10 +7,9 @@
 namespace Exceptionless.Tests.Configuration {
     public class DataExclusionTests {
         [Fact]
-        public void WillIgnoreNullKey() {
+        public void WillHandleNullKey() {
             var ev = new Event();
-            ev.SetProperty(null, "test");
-            Assert.Empty(ev.Data);
+            Assert.Throws<ArgumentNullException>(() => ev.SetProperty(null, "test"));
         }
 
         [Fact]