SqlClientFactory: Override CreateDataAdapter (#19682)

* SqlClientFactory: Override CreateDataAdapter

Override CreateDataAdapter and add tests.

* Address CR feedback

src/System.Data.SqlClient/ref/System.Data.SqlClient.cs

@@ -273,6 +273,7 @@ internal SqlClientFactory() { }
         public override System.Data.Common.DbCommand CreateCommand() { throw null; }
         public override System.Data.Common.DbConnection CreateConnection() { throw null; }
         public override System.Data.Common.DbConnectionStringBuilder CreateConnectionStringBuilder() { throw null; }
+        public override System.Data.Common.DbDataAdapter CreateDataAdapter() { throw null; }
         public override System.Data.Common.DbParameter CreateParameter() { throw null; }
     }
     public sealed partial class SqlCommand : System.Data.Common.DbCommand, System.ICloneable

src/System.Data.SqlClient/src/System/Data/SqlClient/SqlClientFactory.cs

@@ -2,13 +2,8 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-
-
-//------------------------------------------------------------------------------
-
 using System.Data.Common;
 
-
 namespace System.Data.SqlClient
 {
     public sealed class SqlClientFactory : DbProviderFactory
@@ -19,13 +14,11 @@ private SqlClientFactory()
         {
         }
 
-
         public override DbCommand CreateCommand()
         {
             return new SqlCommand();
         }
 
-
         public override DbConnection CreateConnection()
         {
             return new SqlConnection();
@@ -36,11 +29,14 @@ public override DbConnectionStringBuilder CreateConnectionStringBuilder()
             return new SqlConnectionStringBuilder();
         }
 
+        public override DbDataAdapter CreateDataAdapter()
+        {
+            return new SqlDataAdapter();
+        }
 
         public override DbParameter CreateParameter()
         {
             return new SqlParameter();
         }
     }
 }
-

src/System.Data.SqlClient/tests/FunctionalTests/SqlClientFactoryTest.cs

@@ -0,0 +1,43 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using Xunit;
+
+namespace System.Data.SqlClient.Tests
+{
+    public class SqlClientFactoryTest
+    {
+        [Fact]
+        public void InstanceTest()
+        {
+            SqlClientFactory instance = SqlClientFactory.Instance;
+            Assert.NotNull(instance);
+            Assert.Same(instance, SqlClientFactory.Instance);
+        }
+
+        public static readonly object[][] FactoryMethodTestData =
+        {
+            new object[] { new Func<object>(SqlClientFactory.Instance.CreateCommand), typeof(SqlCommand) },
+            new object[] { new Func<object>(SqlClientFactory.Instance.CreateConnection), typeof(SqlConnection) },
+            new object[] { new Func<object>(SqlClientFactory.Instance.CreateConnectionStringBuilder), typeof(SqlConnectionStringBuilder) },
+            new object[] { new Func<object>(SqlClientFactory.Instance.CreateDataAdapter), typeof(SqlDataAdapter) },
+            new object[] { new Func<object>(SqlClientFactory.Instance.CreateParameter), typeof(SqlParameter) },
+        };
+
+        [Theory]
+        [MemberData(nameof(FactoryMethodTestData))]
+        public void FactoryMethodTest(Func<object> factory, Type expectedType)
+        {
+            object value1 = factory();
+            Assert.NotNull(value1);
+            Assert.IsType(expectedType, value1);
+
+            object value2 = factory();
+            Assert.NotNull(value2);
+            Assert.IsType(expectedType, value2);
+
+            Assert.NotSame(value1, value2);
+        }
+    }
+}

src/System.Data.SqlClient/tests/FunctionalTests/System.Data.SqlClient.Tests.csproj

@@ -18,6 +18,7 @@
     <Compile Include="ExceptionTest.cs" />
     <Compile Include="FakeDiagnosticListenerObserver.cs" />
     <Compile Include="SqlBulkCopyColumnMappingCollectionTest.cs" />
+    <Compile Include="SqlClientFactoryTest.cs" />
     <Compile Include="SqlConnectionTest.RetrieveStatistics.cs" />
     <Compile Include="SqlErrorCollectionTest.cs" />
     <Compile Include="TcpDefaultForAzureTest.cs" />