Initial metadata and scripting services (#280)

* Initial metadata service and scripting service files

* Simple metadata lookup with SMO objects

* Add metadata type class

* Remove SMO from metadata service.

* Cleanup metadata service SQL

* Initial MetadataService test

* Add scripting commands

* Add metadata test case

* Remove sleep used for testing

* Use random table name in metadata test

* Add scripting tests

test/Microsoft.SqlTools.ServiceLayer.IntegrationTests/Metadata/MetadataServiceTests.cs

@@ -0,0 +1,96 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+
+using Microsoft.SqlTools.ServiceLayer.Workspace.Contracts;
+using Xunit;
+using Microsoft.SqlTools.ServiceLayer.Test.Common;
+using Microsoft.SqlTools.ServiceLayer.IntegrationTests.Utility;
+using Microsoft.SqlTools.ServiceLayer.Metadata;
+using System.Collections.Generic;
+using Microsoft.SqlTools.ServiceLayer.Metadata.Contracts;
+using System.Data.SqlClient;
+using System;
+
+namespace Microsoft.SqlTools.ServiceLayer.IntegrationTests.Metadata
+{
+    /// <summary>
+    /// Tests for the Metadata service component
+    /// </summary>
+    public class MetadataServiceTests
+    {
+        private string testTableSchema = "dbo";
+        private string testTableName = "MetadataTestTable";
+
+        private LiveConnectionHelper.TestConnectionResult GetLiveAutoCompleteTestObjects()
+        {
+            var textDocument = new TextDocumentPosition
+            {
+                TextDocument = new TextDocumentIdentifier { Uri = Constants.OwnerUri },
+                Position = new Position
+                {
+                    Line = 0,
+                    Character = 0
+                }
+            };
+
+            var result = LiveConnectionHelper.InitLiveConnectionInfo();
+            result.TextDocumentPosition = textDocument;
+            return result;
+        }
+
+        private void CreateTestTable(SqlConnection sqlConn)
+        {
+            string sql = string.Format("IF OBJECT_ID('{0}.{1}', 'U') IS NULL CREATE TABLE {0}.{1}(id int)",
+                this.testTableSchema, this.testTableName);
+            using (var sqlCommand = new SqlCommand(sql, sqlConn))
+            {
+                sqlCommand.ExecuteNonQuery(); 
+            }            
+        }
+
+        private void DeleteTestTable(SqlConnection sqlConn)
+        {
+            string sql = string.Format("IF OBJECT_ID('{0}.{1}', 'U') IS NOT NULL DROP TABLE {0}.{1}",
+                this.testTableSchema, this.testTableName);
+            using (var sqlCommand = new SqlCommand(sql, sqlConn))
+            {
+                sqlCommand.ExecuteNonQuery();
+            }
+        }
+
+        /// <summary>
+        /// Verify that the metadata service correctly returns details for user tables
+        /// </summary>
+        [Fact]
+        public void MetadataReturnsUserTable()
+        {
+            this.testTableName += new Random().Next(1000000, 9999999).ToString();
+
+            var result = GetLiveAutoCompleteTestObjects();
+            var sqlConn = MetadataService.OpenMetadataConnection(result.ConnectionInfo);
+            Assert.NotNull(sqlConn);
+
+            CreateTestTable(sqlConn);
+
+            var metadata = new List<ObjectMetadata>();
+            MetadataService.ReadMetadata(sqlConn, metadata);
+            Assert.NotNull(metadata.Count > 0);
+
+            bool foundTestTable = false;
+            foreach (var item in metadata)
+            {
+                if (string.Equals(item.Schema, this.testTableSchema, StringComparison.OrdinalIgnoreCase)
+                    && string.Equals(item.Name, this.testTableName, StringComparison.OrdinalIgnoreCase))
+                {
+                    foundTestTable = true;
+                    break;
+                }
+            }
+            Assert.True(foundTestTable);
+
+            DeleteTestTable(sqlConn);
+        }
+    }
+}