fixed failing integration tests (#512)

* fixed failing integration tests

* close connection after test

* undo close connection

src/Microsoft.SqlTools.ServiceLayer/LanguageServices/LanguageService.cs

@@ -1345,10 +1345,6 @@ namespace Microsoft.SqlTools.ServiceLayer.LanguageServices
         internal SignatureHelp GetSignatureHelp(TextDocumentPosition textDocumentPosition, ScriptFile scriptFile)
         {
             int startLine = textDocumentPosition.Position.Line;
-            int startColumn = TextUtilities.PositionOfPrevDelimeter(
-                                scriptFile.Contents,
-                                textDocumentPosition.Position.Line,
-                                textDocumentPosition.Position.Character);
             int endColumn = textDocumentPosition.Position.Character;
 
             ScriptParseInfo scriptParseInfo = GetScriptParseInfo(textDocumentPosition.TextDocument.Uri);

test/Microsoft.SqlTools.ServiceLayer.IntegrationTests/Connection/ConnectionServiceTests.cs

@@ -2,7 +2,7 @@
 // Copyright (c) Microsoft. All rights reserved.
 // Licensed under the MIT license. See LICENSE file in the project root for full license information.
 //
-
+using System.Data;
 using System.Data.Common;
 using Microsoft.SqlTools.ServiceLayer.Connection;
 using Microsoft.SqlTools.ServiceLayer.Connection.Contracts;
@@ -69,8 +69,8 @@ namespace Microsoft.SqlTools.ServiceLayer.IntegrationTests.Connection
             var result = LiveConnectionHelper.InitLiveConnectionInfo();
             ConnectionInfo connectionInfo = result.ConnectionInfo;
             ConnectionDetails details = connectionInfo.ConnectionDetails;
-            string uri = connectionInfo.OwnerUri;
             string initialDatabaseName = details.DatabaseName;
+            string uri = connectionInfo.OwnerUri;
             string newDatabaseName = "tempdb";
             string changeDatabaseQuery = "use " + newDatabaseName;
 
@@ -82,9 +82,12 @@ namespace Microsoft.SqlTools.ServiceLayer.IntegrationTests.Connection
 
             // All open DbConnections (Query and Default) should have initialDatabaseName as their database
             foreach (DbConnection connection in connectionInfo.AllConnections)
+            {
+                if (connection != null && connection.State == ConnectionState.Open)
                 {
                     Assert.Equal(connection.Database, initialDatabaseName);
                 }
+            }
 
             // If we run a query to change the database
             query = new Query(changeDatabaseQuery, connectionInfo, new QueryExecutionSettings(), fileStreamFactory);
@@ -93,9 +96,12 @@ namespace Microsoft.SqlTools.ServiceLayer.IntegrationTests.Connection
 
             // All open DbConnections (Query and Default) should have newDatabaseName as their database
             foreach (DbConnection connection in connectionInfo.AllConnections)
+            {
+                if (connection != null && connection.State == ConnectionState.Open) 
                 {
                     Assert.Equal(connection.Database, newDatabaseName);
                 }
             }
         }
+    }
 }

test/Microsoft.SqlTools.ServiceLayer.IntegrationTests/Connection/ReliableConnectionTests.cs

@@ -734,6 +734,7 @@ namespace Microsoft.SqlTools.ServiceLayer.IntegrationTests.Connection
             var retryPolicy = connection.CommandRetryPolicy;
             connection.CommandRetryPolicy = retryPolicy;
             Assert.True(connection.CommandRetryPolicy == retryPolicy);
+            connection.Open();
             connection.ChangeDatabase("master");
             Assert.True(connection.ConnectionTimeout > 0);
             connection.ClearPool();

test/Microsoft.SqlTools.ServiceLayer.IntegrationTests/QueryExecution/ExecuteTests.cs

@@ -87,15 +87,15 @@ namespace Microsoft.SqlTools.ServiceLayer.IntegrationTests.QueryExecution
 
             // If I use master, the current database should be master
             CreateAndExecuteQuery(string.Format(useQuery, master), connInfo, fileStreamFactory);
-            Assert.Equal(master, connection.Database);
+            Assert.Equal(master, connInfo.ConnectionDetails.DatabaseName);
 
             // If I use tempdb, the current database should be tempdb
             CreateAndExecuteQuery(string.Format(useQuery, tempdb), connInfo, fileStreamFactory);
-            Assert.Equal(tempdb, connection.Database);
+            Assert.Equal(tempdb, connInfo.ConnectionDetails.DatabaseName);
 
             // If I switch back to master, the current database should be master
             CreateAndExecuteQuery(string.Format(useQuery, master), connInfo, fileStreamFactory);
-            Assert.Equal(master, connection.Database);
+            Assert.Equal(master, connInfo.ConnectionDetails.DatabaseName);
         }
 
         public Query CreateAndExecuteQuery(string queryText, ConnectionInfo connectionInfo, IFileStreamFactory fileStreamFactory)