Deduplicate code

Author: David-Engel

src/Microsoft.Data.SqlClient/tests/ManualTests/SQL/InstanceNameTest/InstanceNameTest.cs

@@ -48,7 +48,7 @@ public static void ConnectManagedWithInstanceNameTest(bool useMultiSubnetFailove
             builder.IPAddressPreference = ipPreference;
 
 
-            Assert.True(ParseDataSource(builder.DataSource, out string hostname, out _, out string instanceName));
+            Assert.True(DataTestUtility.ParseDataSource(builder.DataSource, out string hostname, out _, out string instanceName));
 
             if (IsBrowserAlive(hostname) && IsValidInstance(hostname, instanceName))
             {
@@ -82,40 +82,6 @@ public static void ConnectManagedWithInstanceNameTest(bool useMultiSubnetFailove
             }
         }
 
-        private static bool ParseDataSource(string dataSource, out string hostname, out int port, out string instanceName)
-        {
-            hostname = string.Empty;
-            port = -1;
-            instanceName = string.Empty;
-
-            if (dataSource.Contains(",") && dataSource.Contains("\\"))
-                return false;
-
-            if (dataSource.Contains(":"))
-            {
-                dataSource = dataSource.Substring(dataSource.IndexOf(":") + 1);
-            }
-
-            if (dataSource.Contains(","))
-            {
-                if (!int.TryParse(dataSource.Substring(dataSource.LastIndexOf(",") + 1), out port))
-                {
-                    return false;
-                }
-                dataSource = dataSource.Substring(0, dataSource.IndexOf(",") - 1);
-            }
-
-            if (dataSource.Contains("\\"))
-            {
-                instanceName = dataSource.Substring(dataSource.LastIndexOf("\\") + 1);
-                dataSource = dataSource.Substring(0, dataSource.LastIndexOf("\\"));
-            }
-
-            hostname = dataSource;
-
-            return hostname.Length > 0 && hostname.IndexOfAny(new char[] { '\\', ':', ',' }) == -1;
-        }
-
         private static bool IsBrowserAlive(string browserHostname)
         {
             const byte ClntUcastEx = 0x03;