Added a test

MailJet.Client.Tests/MailJet.Client.Tests.csproj

@@ -40,6 +40,7 @@
     <Compile Include="GetMessages.cs" />
     <Compile Include="SendMail.cs" />
     <Compile Include="AccountTests.cs" />
+    <Compile Include="StatisticsTests.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <ItemGroup>

MailJet.Client.Tests/StatisticsTests.cs

@@ -0,0 +1,42 @@
+using NUnit.Framework;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MailJet.Client.Tests
+{
+    [TestFixture]
+    public class StatisticsTests
+    {
+        private MailJetClient _client;
+
+        [SetUp]
+        public void Setup()
+        {
+#if DEBUG
+            var publicKey = Environment.GetEnvironmentVariable("MailJetPub", EnvironmentVariableTarget.User);
+            var privateKey = Environment.GetEnvironmentVariable("MailJetPri", EnvironmentVariableTarget.User);
+#else
+            var publicKey = Environment.GetEnvironmentVariable("MailJetPub");
+            var privateKey = Environment.GetEnvironmentVariable("MailJetPri");
+#endif
+
+
+            if (String.IsNullOrWhiteSpace(publicKey))
+                throw new InvalidOperationException("Add your MailJet public API Key to the Environment Variable \"MailJetPub\".");
+            if (String.IsNullOrWhiteSpace(privateKey))
+                throw new InvalidOperationException("Add your MailJet private API Key to the Environment Variable \"MailJetPri\".");
+
+            _client = new MailJetClient(publicKey, privateKey);
+        }
+
+        [Test]
+        public void GetAggregateGraphStatistics()
+        {
+            var result = _client.GetAggregateGraphStatistics();
+            Assert.IsNotNull(result);
+        }
+    }
+}

MailJetClient/Response/Data/AggregateGraphStatistics.cs

@@ -1,6 +1,6 @@
 namespace MailJet.Client.Response.Data
 {
-    public class AggregateGraphStatistics: DataItem
+    public class AggregateGraphStatistics : DataItem
     {
         /// <summary>
         /// Number of blocked messages.