Add tests for the language service diagnostics

src/ServiceHost/Workspace/ScriptFile.cs

@@ -106,6 +106,13 @@ namespace Microsoft.SqlTools.EditorServices
 
         #region Constructors
 
+        /// <summary>
+        /// Add a default constructor for testing
+        /// </summary>
+        public ScriptFile()
+        {
+        }
+
         /// <summary>
         /// Creates a new ScriptFile instance by reading file contents from
         /// the given TextReader.
@@ -433,11 +440,11 @@ namespace Microsoft.SqlTools.EditorServices
             return new BufferRange(startPosition, endPosition);
         }
 
-        #endregion
-
-        #region Private Methods
-
-        private void SetFileContents(string fileContents)
+        /// <summary>
+        /// Set the script files contents
+        /// </summary>
+        /// <param name="fileContents"></param>
+        public void SetFileContents(string fileContents)
         {
             // Split the file contents into lines and trim
             // any carriage returns from the strings.
@@ -451,6 +458,10 @@ namespace Microsoft.SqlTools.EditorServices
             this.ParseFileContents();
         }
 
+        #endregion
+
+        #region Private Methods
+
         /// <summary>
         /// Parses the current file contents to get the AST, tokens,
         /// and parse errors.