[5.2] Port PR 2896 (Allow errors with negative numbers to be considered transient)

src/Microsoft.Data.SqlClient/src/Microsoft/Data/SqlClient/Reliability/SqlConfigurableRetryLogicLoader.cs

@@ -314,7 +314,7 @@ private static ICollection<int> SplitErrorNumberList(string list)
                     HashSet<int> set = new HashSet<int>();
                     for (int index = 0; index < parts.Length; index++)
                     {
-                        if (int.TryParse(parts[index], System.Globalization.NumberStyles.AllowLeadingWhite | System.Globalization.NumberStyles.AllowTrailingWhite, null, out int value))
+                        if (int.TryParse(parts[index], System.Globalization.NumberStyles.Integer, null, out int value))
                         {
                             set.Add(value);
                         }

src/Microsoft.Data.SqlClient/tests/ManualTests/SQL/RetryLogic/RetryLogicConfigHelper.cs

@@ -28,6 +28,9 @@ public class RetryLogicConfigHelper
 
         private const string SqlRetryLogicTypeName = "Microsoft.Data.SqlClient.SqlRetryLogic";
 
+        private const string CreateExceptionMethodName = "CreateException";
+        private const string AddMethodName = "Add";
+
         public const string DefaultTransientErrors = "1204, 1205, 1222, 49918, 49919, 49920, 4060, 4221, 40143, 40613, 40501, 40540, 40197, 42108, 42109, 10929, 10928, 10060, 10054, 10053, 997, 233, 64, 20, 0, -2, 207, 102, 2812";
 
         private static readonly Random s_random = new Random();
@@ -36,13 +39,23 @@ public class RetryLogicConfigHelper
         private static readonly Type s_appContextSwitchManagerType = s_sqlClientAssembly.GetType(AppContextSwitchManagerTypeName);
         private static readonly Type s_sqlretrylogicType = s_sqlClientAssembly.GetType(SqlRetryLogicTypeName);
         private static readonly Type s_configurationLoaderType = s_sqlClientAssembly.GetType(ConfigurationLoaderTypeName);
+        private static readonly Type s_sqlErrorType = typeof(SqlError);
+        private static readonly Type s_sqlErrorCollectionType = typeof(SqlErrorCollection);
         private static readonly Type[] s_cfgLoaderParamsType = new Type[]
         {
             s_sqlClientAssembly.GetType(InterfaceCnnCfgTypeName),
             s_sqlClientAssembly.GetType(InterfaceCmdCfgTypeName),
             typeof(string), typeof(string)
         };
+        private static readonly Type[] s_sqlErrorParamsType = new Type[]
+        {
+            typeof(int), typeof(byte), typeof(byte),
+            typeof(string), typeof(string), typeof(string),
+            typeof(int), typeof(Exception)
+        };
         private static readonly ConstructorInfo s_loaderCtorInfo = s_configurationLoaderType.GetConstructor(s_cfgLoaderParamsType);
+        private static readonly ConstructorInfo s_sqlErrorCtorInfo = s_sqlErrorType.GetConstructor(BindingFlags.Instance | BindingFlags.NonPublic, null, s_sqlErrorParamsType, null);
+        private static readonly ConstructorInfo s_sqlErrorCollectionCtorInfo = s_sqlErrorCollectionType.GetConstructor(BindingFlags.Instance | BindingFlags.NonPublic, null, Type.EmptyTypes, null);
 
         public static object CreateLoader(RetryLogicConfigs cnnConfig, RetryLogicConfigs cmdConfig)
         {
@@ -164,6 +177,22 @@ public static RetryLogicConfigs CreateRandomConfig(string method, string authori
             };
         }
 
+        public static SqlException CreateSqlException(int errorNumber)
+        {
+            MethodInfo addSqlErrorMethod = typeof(SqlErrorCollection).GetMethod(AddMethodName, BindingFlags.Instance | BindingFlags.NonPublic);
+            MethodInfo createExceptionMethod = typeof(SqlException).GetMethod(CreateExceptionMethodName, BindingFlags.Static | BindingFlags.NonPublic,
+                null, new Type[] { typeof(SqlErrorCollection), typeof(string) }, null);
+
+            SqlError sqlError = s_sqlErrorCtorInfo.Invoke(new object[] { errorNumber, (byte)0, (byte)0, string.Empty, string.Empty, string.Empty, 0, null }) as SqlError;
+            SqlErrorCollection sqlErrorCollection = s_sqlErrorCollectionCtorInfo.Invoke(new object[0] { }) as SqlErrorCollection;
+
+            addSqlErrorMethod.Invoke(sqlErrorCollection, new object[] { sqlError });
+
+            SqlException sqlException = createExceptionMethod.Invoke(null, new object[] { sqlErrorCollection, string.Empty }) as SqlException;
+
+            return sqlException;
+        }
+
         private static TimeSpan GenerateTimeSpan(TimeSpan start, TimeSpan end)
         {
             int max = (int)(end - start).TotalSeconds;

src/Microsoft.Data.SqlClient/tests/ManualTests/SQL/RetryLogic/SqlConfigurationManagerReliabilityTest.cs

@@ -222,6 +222,30 @@ public void InvalidTransientError(string errors)
         }
         #endregion
 
+        #region Valid Configurations
+        [Theory]
+        [InlineData("-1,1,2,3")]
+        [InlineData("-1, 1, 2 , 3, -2")]
+        [InlineData("")]
+        public void ValidTransientError(string errors)
+        {
+            string[] transientErrorNumbers = errors.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
+            RetryLogicConfigs cnnCfg = RetryLogicConfigHelper.CreateRandomConfig(RetryLogicConfigHelper.RetryMethodName_Fix);
+            cnnCfg.TransientErrors = errors;
+            RetryLogicConfigs cmdCfg = RetryLogicConfigHelper.CreateRandomConfig(RetryLogicConfigHelper.RetryMethodName_Fix, @"Don't care!");
+
+            RetryLogicConfigHelper.ReturnLoaderAndProviders(cnnCfg, cmdCfg, out SqlRetryLogicBaseProvider cnnProvider, out _);
+
+            foreach(string errorString in transientErrorNumbers)
+            {
+                int errorNumber = int.Parse(errorString.Trim());
+                SqlException transientException = RetryLogicConfigHelper.CreateSqlException(errorNumber);
+
+                Assert.True(cnnProvider.RetryLogic.TransientPredicate(transientException), $"Error {errorNumber} is not considered transient by the predicate.");
+            }
+        }
+        #endregion
+
         #region private methods
         private void TestConnection(SqlRetryLogicBaseProvider provider, RetryLogicConfigs cnfig)
         {