Include singleline comments outside batch for nb convert (#1139)

* Include singleline comments outside batch for nb convert

* Remove extra space

test/Microsoft.SqlTools.ServiceLayer.UnitTests/NotebookConvert/NotebookConvertServiceTests.cs

@@ -0,0 +1,105 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+
+using NUnit.Framework;
+using Microsoft.SqlTools.ServiceLayer.NotebookConvert;
+using Newtonsoft.Json;
+
+namespace Microsoft.SqlTools.ServiceLayer.UnitTests.NotebookConvert
+{
+
+    [TestFixture]
+    public class NotebookConvertServiceTests
+    {
+        [Test]
+        public void ConvertSqlToNotebook()
+        {
+            var sql = @"
+/* 
+ * Initial multiline comment
+ */ 
+
+-- Comment before batch
+SELECT * FROM sys.databases
+
+-- Compare Row Counts in Tables From Two Different Databases With the Same Schema
+
+SELECT * -- inline single line comment
+/* inline multiline
+ * comment
+ */
+FROM sys.databases
+
+-- ending single line comment
+/**
+ * Ending multiline
+ * comment
+ */
+";
+
+            var expectedNotebook = @"{
+  ""metadata"": {
+    ""kernelspec"": {
+      ""name"": ""SQL"",
+      ""display_name"": ""SQL"",
+      ""language"": ""sql""
+    },
+    ""language_info"": {
+      ""name"": ""sql"",
+      ""version"": """"
+    }
+  },
+  ""nbformat_minor"": 2,
+  ""nbformat"": 4,
+  ""cells"": [
+    {
+      ""cell_type"": ""markdown"",
+      ""source"": [
+        ""* Initial multiline comment""
+      ]
+    },
+    {
+      ""cell_type"": ""markdown"",
+      ""source"": [
+        ""Comment before batch""
+      ]
+    },
+    {
+      ""cell_type"": ""code"",
+      ""source"": [
+        ""SELECT * FROM sys.databases\n"",
+        ""\n"",
+        ""-- Compare Row Counts in Tables From Two Different Databases With the Same Schema\n"",
+        ""\n"",
+        ""SELECT * -- inline single line comment\n"",
+        ""/* inline multiline\n"",
+        "" * comment\n"",
+        "" */\n"",
+        ""FROM sys.databases""
+      ]
+    },
+    {
+      ""cell_type"": ""markdown"",
+      ""source"": [
+        ""ending single line comment""
+      ]
+    },
+    {
+      ""cell_type"": ""markdown"",
+      ""source"": [
+        ""* Ending multiline  \n"",
+        "" * comment""
+      ]
+    }
+  ]
+}";
+
+            var notebook = NotebookConvertService.ConvertSqlToNotebook(sql);
+            var notebookString = JsonConvert.SerializeObject(notebook, Formatting.Indented);
+            Assert.AreEqual(expectedNotebook, notebookString);
+        }
+
+    }
+}