From 3cf4518e1ff9c51646dab56dd5086e1ed03c59b6 Mon Sep 17 00:00:00 2001
From: Marc Gravell <marc.gravell@gmail.com>
Date: Fri, 12 Apr 2024 11:05:01 +0100
Subject: [PATCH] test fix

---
 Dapper/SqlMapper.cs                    |  7 +++++-
 tests/Dapper.Tests/TypeHandlerTests.cs | 35 +++++++++++++++++---------
 2 files changed, 29 insertions(+), 13 deletions(-)

diff --git a/Dapper/SqlMapper.cs b/Dapper/SqlMapper.cs
index f624f1e9..c6374075 100644
--- a/Dapper/SqlMapper.cs
+++ b/Dapper/SqlMapper.cs
@@ -3926,7 +3926,12 @@ public static void ThrowDataException(Exception ex, int index, IDataReader reade
                         }
                         else
                         {
-                            formattedValue = Convert.ToString(value) + " - " + Type.GetTypeCode(value.GetType());
+                            formattedValue = Convert.ToString(value) + " - " + Identify(value.GetType());
+                        }
+                        static string Identify(Type type)
+                        {
+                            var tc = Type.GetTypeCode(type);
+                            return tc == TypeCode.Object ? type.Name : tc.ToString();
                         }
                     }
                     catch (Exception valEx)
diff --git a/tests/Dapper.Tests/TypeHandlerTests.cs b/tests/Dapper.Tests/TypeHandlerTests.cs
index 80c3292f..385ffb90 100644
--- a/tests/Dapper.Tests/TypeHandlerTests.cs
+++ b/tests/Dapper.Tests/TypeHandlerTests.cs
@@ -28,12 +28,18 @@ public void TestChangingDefaultStringTypeMappingToAnsiString()
 
             SqlMapper.PurgeQueryCache();
 
-            SqlMapper.AddTypeMap(typeof(string), DbType.AnsiString, true); // Change Default String Handling to AnsiString
-            var result02 = connection.Query<string>(sql, param).FirstOrDefault();
-            Assert.Equal("varchar", result02);
+            SqlMapper.AddTypeMap(typeof(string), DbType.AnsiString, false); // Change Default String Handling to AnsiString
+            try
+            {
+                var result02 = connection.Query<string>(sql, param).FirstOrDefault();
+                Assert.Equal("varchar", result02);
 
-            SqlMapper.PurgeQueryCache();
-            SqlMapper.AddTypeMap(typeof(string), DbType.String, true);  // Restore Default to Unicode String
+                SqlMapper.PurgeQueryCache();
+            }
+            finally
+            {
+                SqlMapper.AddTypeMap(typeof(string), DbType.String, false); // Restore Default to Unicode String
+            }
         }
 
         [Fact]
@@ -46,13 +52,18 @@ public void TestChangingDefaultStringTypeMappingToAnsiStringFirstOrDefault()
             Assert.Equal("nvarchar", result01);
 
             SqlMapper.PurgeQueryCache();
+            SqlMapper.AddTypeMap(typeof(string), DbType.AnsiString, false); // Change Default String Handling to AnsiString
+            try
+            {
+                var result02 = connection.QueryFirstOrDefault<string>(sql, param);
+                Assert.Equal("varchar", result02);
 
-            SqlMapper.AddTypeMap(typeof(string), DbType.AnsiString, true); // Change Default String Handling to AnsiString
-            var result02 = connection.QueryFirstOrDefault<string>(sql, param);
-            Assert.Equal("varchar", result02);
-
-            SqlMapper.PurgeQueryCache();
-            SqlMapper.AddTypeMap(typeof(string), DbType.String, true);  // Restore Default to Unicode String
+                SqlMapper.PurgeQueryCache();
+            }
+            finally
+            {
+                SqlMapper.AddTypeMap(typeof(string), DbType.String, false); // Restore Default to Unicode String
+            }
         }
 
         [Fact]
@@ -643,7 +654,7 @@ public void Issue149_TypeMismatch_SequentialAccess()
         {
             Guid guid = Guid.Parse("cf0ef7ac-b6fe-4e24-aeda-a2b45bb5654e");
             var ex = Assert.ThrowsAny<Exception>(() => connection.Query<Issue149_Person>("select @guid as Id", new { guid }).First());
-            Assert.Equal("Error parsing column 0 (Id=n/a - Unable to cast object of type 'System.Guid' to type 'System.String'.)", ex.Message);
+            Assert.Equal("Error parsing column 0 (Id=cf0ef7ac-b6fe-4e24-aeda-a2b45bb5654e - Guid)", ex.Message);
         }
 
         public class Issue149_Person { public string? Id { get; set; } }