Include ManagedBatchParser tests to improve code coverage (#793)

* Include ManagedBatchParser test to improve code coverage

* Fix some failing test cases and revert appveyor.yml

test/Microsoft.SqlTools.ManagedBatchParser.IntegrationTests/BatchParser/BatchParserWrapperTests.cs

@@ -0,0 +1,92 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+
+using System;
+using Microsoft.SqlTools.ServiceLayer.BatchParser;
+using Microsoft.SqlTools.ServiceLayer.BatchParser.ExecutionEngineCode;
+using Xunit;
+
+namespace Microsoft.SqlTools.ManagedBatchParser.UnitTests.BatchParser
+{
+    public class BatchParserWrapperTests
+    {
+        [Fact]
+        public void CheckSimpleSingleSQLBatchStatement()
+        {
+            using (BatchParserWrapper parserWrapper = new BatchParserWrapper())
+            {
+                string sqlScript = "select * from sys.objects";
+                var batches = parserWrapper.GetBatches(sqlScript);
+                Assert.Equal(1, batches.Count);
+                BatchDefinition batch = batches[0];
+                Assert.Equal(sqlScript, batch.BatchText);
+                Assert.Equal(1, batch.StartLine);
+                Assert.Equal(1, batch.StartColumn);
+                Assert.Equal(2, batch.EndLine);
+                Assert.Equal(sqlScript.Length + 1, batch.EndColumn);
+                Assert.Equal(1, batch.BatchExecutionCount);
+            }
+        }
+
+        [Fact]
+        public void CheckSimpleMultipleQLBatchStatement()
+        {
+            using (BatchParserWrapper parserWrapper = new BatchParserWrapper())
+            {
+                string sqlScript = @"SELECT 'FirstLine';
+                    GO
+                    SELECT 'MiddleLine_1';
+                    GO
+                    SELECT 'MiddleLine_1'
+                    GO
+                    SELECT 'LastLine'";
+                var batches = parserWrapper.GetBatches(sqlScript);
+                // Each select statement is one batch , so we are expecting 4 batches.
+                Assert.Equal(4, batches.Count);
+            }
+        }
+
+        [Fact]
+        public void CheckSQLBatchStatementWithRepeatExecution()
+        {
+            using (BatchParserWrapper parserWrapper = new BatchParserWrapper())
+            {
+                string sqlScript = "select * from sys.object" + Environment.NewLine + "GO 2";
+                var batches = parserWrapper.GetBatches(sqlScript);
+                Assert.Equal(1, batches.Count);
+                BatchDefinition batch = batches[0];
+                Assert.Equal(2, batch.BatchExecutionCount);
+            }
+        }
+
+        [Fact]
+        public void CheckComment()
+        {
+            using (BatchParserWrapper parserWrapper = new BatchParserWrapper())
+            {
+                string sqlScript = "-- this is a comment --";
+                var batches = parserWrapper.GetBatches(sqlScript);
+                Assert.Equal(1, batches.Count);
+                BatchDefinition batch = batches[0];
+                Assert.Equal(sqlScript, batch.BatchText);
+                Assert.Equal(1, batch.StartLine);
+                Assert.Equal(1, batch.StartColumn);
+                Assert.Equal(2, batch.EndLine);
+                Assert.Equal(sqlScript.Length + 1, batch.EndColumn);
+            }
+        }
+
+        [Fact]
+        public void CheckNoOps()
+        {
+            using (BatchParserWrapper parserWrapper = new BatchParserWrapper())
+            {
+                string sqlScript = "GO";
+                var batches = parserWrapper.GetBatches(sqlScript);
+                Assert.Equal(0, batches.Count);
+            }
+        }
+    }
+}