Added test driver program for service host (#113)

* Added test driver program for service host

* Fix typo

test/Microsoft.SqlTools.ServiceLayer.TestDriver/Tests/ExampleTests.cs

@@ -0,0 +1,38 @@
+using System;
+using System.Threading.Tasks;
+using Microsoft.SqlTools.ServiceLayer.Connection.Contracts;
+using Microsoft.SqlTools.ServiceLayer.TestDriver.Driver;
+
+namespace Microsoft.SqlTools.ServiceLayer.TestDriver.Tests
+{
+    public class ExampleTests
+    {
+        /// <summary>
+        /// Example test that performs a connect, then disconnect.
+        /// All tests must have the same signature of returning an async Task
+        /// and taking in a ServiceTestDriver as a parameter.
+        /// </summary>
+        public async Task ConnectDisconnectTest(ServiceTestDriver driver)
+        {
+            var connectParams = new ConnectParams();
+            connectParams.OwnerUri = "file";
+            connectParams.Connection = new ConnectionDetails();
+            connectParams.Connection.ServerName = "localhost";
+            connectParams.Connection.AuthenticationType = "Integrated";
+            
+            var result = await driver.SendRequest(ConnectionRequest.Type, connectParams);
+            if (result)
+            {
+                await driver.WaitForEvent(ConnectionCompleteNotification.Type);
+
+                var disconnectParams = new DisconnectParams();
+                disconnectParams.OwnerUri = "file";
+                var result2 = await driver.SendRequest(DisconnectRequest.Type, disconnectParams);
+                if (result2)
+                {
+                    Console.WriteLine("success");
+                }
+            }
+        }
+    }
+}