added some unit tests

mRemoteNGTests/Config/Connections/Multiuser/ConnectionsUpdateAvailableEventArgsTests.cs

@@ -0,0 +1,42 @@
+using System;
+using mRemoteNG.Config.Connections.Multiuser;
+using mRemoteNG.Config.DatabaseConnectors;
+using NSubstitute;
+using NUnit.Framework;
+// ReSharper disable ObjectCreationAsStatement
+
+namespace mRemoteNGTests.Config.Connections.Multiuser
+{
+    public class ConnectionsUpdateAvailableEventArgsTests
+    {
+        private IDatabaseConnector _databaseConnector;
+        private DateTime _dateTime;
+
+        [SetUp]
+        public void Setup()
+        {
+            _databaseConnector = Substitute.For<IDatabaseConnector>();
+            _dateTime = DateTime.MinValue;
+        }
+
+        [Test]
+        public void CantProvideNullDatabaseConnectorToCtor()
+        {
+            Assert.Throws<ArgumentNullException>(() => new ConnectionsUpdateAvailableEventArgs(null, _dateTime));
+        }
+
+        [Test]
+        public void DatabaseConnectorPropertySet()
+        {
+            var eventArgs = new ConnectionsUpdateAvailableEventArgs(_databaseConnector, _dateTime);
+            Assert.That(eventArgs.DatabaseConnector, Is.EqualTo(_databaseConnector));
+        }
+
+        [Test]
+        public void UpdateTimePropertySet()
+        {
+            var eventArgs = new ConnectionsUpdateAvailableEventArgs(_databaseConnector, _dateTime);
+            Assert.That(eventArgs.UpdateTime, Is.EqualTo(_dateTime));
+        }
+    }
+}

mRemoteNGTests/mRemoteNGTests.csproj

@@ -111,6 +111,7 @@
   <ItemGroup>
     <Compile Include="App\UpdaterTests.cs" />
     <Compile Include="BinaryFileTests.cs" />
+    <Compile Include="Config\Connections\Multiuser\ConnectionsUpdateAvailableEventArgsTests.cs" />
     <Compile Include="Config\Serializers\DataTableDeserializerTests.cs" />
     <Compile Include="Config\CredentialHarvesterTests.cs" />
     <Compile Include="Config\CredentialRecordLoaderTests.cs" />

mRemoteV1/Config/Connections/Multiuser/ConnectionsUpdateAvailableEventArgs.cs

@@ -13,6 +13,8 @@ namespace mRemoteNG.Config.Connections.Multiuser
 
         public ConnectionsUpdateAvailableEventArgs(IDatabaseConnector databaseConnector, DateTime updateTime)
         {
+            if (databaseConnector == null)
+                throw new ArgumentNullException(nameof(databaseConnector));
             DatabaseConnector = databaseConnector;
             UpdateTime = updateTime;
         }