tests: Use final and add constructor where needed

src/test/java/org/apache/ibatis/builder/XmlConfigBuilderTest.java

@@ -333,7 +333,7 @@ void propertiesSpecifyResourceAndUrlAtSameTime() {
         "The properties element cannot specify both a URL and a resource based property file reference.  Please specify one or the other.");
   }
 
-  static class MySqlProvider {
+  static final class MySqlProvider {
     @SuppressWarnings("unused")
     public static String provideSql() {
       return "SELECT 1";

src/test/java/org/apache/ibatis/databases/blog/StoredProcedures.java

@@ -1,5 +1,5 @@
 /*
- *    Copyright 2009-2023 the original author or authors.
+ *    Copyright 2009-2024 the original author or authors.
  *
  *    Licensed under the Apache License, Version 2.0 (the "License");
  *    you may not use this file except in compliance with the License.
@@ -21,7 +21,7 @@
 import java.sql.ResultSet;
 import java.sql.SQLException;
 
-public class StoredProcedures {
+public final class StoredProcedures {
   public static void selectTwoSetsOfTwoAuthors(int p1, int p2, ResultSet[] rs1, ResultSet[] rs2) throws SQLException {
     try (Connection conn = DriverManager.getConnection("jdbc:default:connection")) {
       PreparedStatement ps1 = conn.prepareStatement("select * from author where id in (?,?)");

src/test/java/org/apache/ibatis/executor/ExecutorTestHelper.java

@@ -53,7 +53,7 @@
 import org.apache.ibatis.type.JdbcType;
 import org.apache.ibatis.type.TypeHandlerRegistry;
 
-class ExecutorTestHelper {
+final class ExecutorTestHelper {
 
   static final Cache authorCache;
 

src/test/java/org/apache/ibatis/plugin/PluginTest.java

@@ -60,7 +60,7 @@ void shouldPluginSwitchSchema() {
     }
   }
 
-  static class SchemaHolder {
+  static final class SchemaHolder {
     private static ThreadLocal<String> value = ThreadLocal.withInitial(() -> "PUBLIC");
 
     public static void set(String tenantName) {
@@ -70,6 +70,9 @@ public static void set(String tenantName) {
     public static String get() {
       return value.get();
     }
+
+    private SchemaHolder() {
+    }
   }
 
   @Intercepts(@Signature(type = StatementHandler.class, method = "prepare", args = { Connection.class, Integer.class }))

src/test/java/org/apache/ibatis/submitted/constructor_automapping/Author.java

@@ -1,5 +1,5 @@
 /*
- *    Copyright 2009-2023 the original author or authors.
+ *    Copyright 2009-2024 the original author or authors.
  *
  *    Licensed under the Apache License, Version 2.0 (the "License");
  *    you may not use this file except in compliance with the License.
@@ -15,7 +15,7 @@
  */
 package org.apache.ibatis.submitted.constructor_automapping;
 
-public class Author {
+public final class Author {
 
   private final Integer id;
   private String name;

src/test/java/org/apache/ibatis/submitted/dirty_select/Mapper.java

@@ -1,5 +1,5 @@
 /*
- *    Copyright 2009-2023 the original author or authors.
+ *    Copyright 2009-2024 the original author or authors.
  *
  *    Licensed under the Apache License, Version 2.0 (the "License");
  *    you may not use this file except in compliance with the License.
@@ -44,7 +44,7 @@ public interface Mapper {
   @Insert("insert into users (name) values (#{name}) returning id, name")
   int insert(User user);
 
-  static class MyProvider {
+  static final class MyProvider {
     public static String getSql() {
       return "insert into users (name) values (#{name}) returning id, name";
     }

src/test/java/org/apache/ibatis/submitted/discriminator/Contract.java

@@ -16,8 +16,8 @@
 package org.apache.ibatis.submitted.discriminator;
 
 public class Contract {
-  private Integer id;
-  private Owner owner;
+  private final Integer id;
+  private final Owner owner;
 
   public Contract(Integer id, Owner owner) {
     this.id = id;

src/test/java/org/apache/ibatis/submitted/dynsql/CustomUtil.java

@@ -1,5 +1,5 @@
 /*
- *    Copyright 2009-2023 the original author or authors.
+ *    Copyright 2009-2024 the original author or authors.
  *
  *    Licensed under the Apache License, Version 2.0 (the "License");
  *    you may not use this file except in compliance with the License.
@@ -15,7 +15,7 @@
  */
 package org.apache.ibatis.submitted.dynsql;
 
-public class CustomUtil {
+public final class CustomUtil {
   public static String esc(final String s) {
     return s.replace("'", "''");
   }

src/test/java/org/apache/ibatis/submitted/enum_with_method/Mood.java

@@ -29,7 +29,7 @@ public String getMessage() {
     }
   };
 
-  private int value;
+  private final int value;
 
   Mood(int value) {
     this.value = value;

src/test/java/org/apache/ibatis/submitted/global_variables_defaults/SupportClasses.java

@@ -1,5 +1,5 @@
 /*
- *    Copyright 2009-2023 the original author or authors.
+ *    Copyright 2009-2024 the original author or authors.
  *
  *    Licensed under the Apache License, Version 2.0 (the "License");
  *    you may not use this file except in compliance with the License.
@@ -54,7 +54,7 @@ public void setName(String name) {
     }
   }
 
-  static class Utils {
+  static final class Utils {
     static SupportClasses.CustomCache unwrap(Cache cache) {
       Field field;
       try {

src/test/java/org/apache/ibatis/submitted/ognlstatic/StaticClass.java

@@ -1,5 +1,5 @@
 /*
- *    Copyright 2009-2023 the original author or authors.
+ *    Copyright 2009-2024 the original author or authors.
  *
  *    Licensed under the Apache License, Version 2.0 (the "License");
  *    you may not use this file except in compliance with the License.
@@ -15,7 +15,7 @@
  */
 package org.apache.ibatis.submitted.ognlstatic;
 
-public class StaticClass {
+public final class StaticClass {
 
   public static String value = "User1";
 

src/test/java/org/apache/ibatis/submitted/primitive_result_type/IbatisConfig.java

@@ -22,7 +22,7 @@
 import org.apache.ibatis.session.SqlSessionFactory;
 import org.apache.ibatis.session.SqlSessionFactoryBuilder;
 
-public class IbatisConfig {
+public final class IbatisConfig {
 
   private static SqlSessionFactory sqlSessionFactory;
 

src/test/java/org/apache/ibatis/submitted/primitive_result_type/ProductDAO.java

@@ -1,5 +1,5 @@
 /*
- *    Copyright 2009-2023 the original author or authors.
+ *    Copyright 2009-2024 the original author or authors.
  *
  *    Licensed under the Apache License, Version 2.0 (the "License");
  *    you may not use this file except in compliance with the License.
@@ -20,7 +20,7 @@
 
 import org.apache.ibatis.session.SqlSession;
 
-public class ProductDAO {
+public final class ProductDAO {
 
   public static List<Integer> selectProductCodes() {
     try (SqlSession session = IbatisConfig.getSession()) {

src/test/java/org/apache/ibatis/submitted/repeatable/BothSelectAndSelectProviderMapper.java

@@ -1,5 +1,5 @@
 /*
- *    Copyright 2009-2023 the original author or authors.
+ *    Copyright 2009-2024 the original author or authors.
  *
  *    Licensed under the Apache License, Version 2.0 (the "License");
  *    you may not use this file except in compliance with the License.
@@ -24,7 +24,7 @@ public interface BothSelectAndSelectProviderMapper {
   @SelectProvider(type = SqlProvider.class, method = "getUser")
   User getUser(Integer id);
 
-  class SqlProvider {
+  final class SqlProvider {
     public static String getUser() {
       return "SELECT * FROM users WHERE id = #{id}";
     }

src/test/java/org/apache/ibatis/submitted/repeatable/BothSelectContainerAndSelectProviderContainerMapper.java

@@ -1,5 +1,5 @@
 /*
- *    Copyright 2009-2023 the original author or authors.
+ *    Copyright 2009-2024 the original author or authors.
  *
  *    Licensed under the Apache License, Version 2.0 (the "License");
  *    you may not use this file except in compliance with the License.
@@ -26,7 +26,7 @@ public interface BothSelectContainerAndSelectProviderContainerMapper {
   @SelectProvider(type = SqlProvider.class, method = "getUser")
   User getUser(Integer id);
 
-  class SqlProvider {
+  final class SqlProvider {
     public static String getUser() {
       return "SELECT * FROM users WHERE id = #{id}";
     }

src/test/java/org/apache/ibatis/submitted/repeatable/Mapper.java

@@ -1,5 +1,5 @@
 /*
- *    Copyright 2009-2023 the original author or authors.
+ *    Copyright 2009-2024 the original author or authors.
  *
  *    Licensed under the Apache License, Version 2.0 (the "License");
  *    you may not use this file except in compliance with the License.
@@ -94,7 +94,7 @@ public interface Mapper {
   @Select("SELECT COUNT(*) FROM users WHERE name LIKE '%' || #{dataabse} || '%'")
   int countByCurrentDatabase(String database);
 
-  class HsqlSqlProvider {
+  final class HsqlSqlProvider {
     public static String getUserUsingProvider() {
       return "SELECT id, name, 'HSQL' as databaseName FROM users WHERE id = #{id}";
     }
@@ -115,7 +115,7 @@ private HsqlSqlProvider() {
     }
   }
 
-  class DerbySqlProvider {
+  final class DerbySqlProvider {
     public static String getUserUsingProvider() {
       return "SELECT id, name, 'DERBY' as databaseName FROM users WHERE id = #{id}";
     }
@@ -136,7 +136,7 @@ private DerbySqlProvider() {
     }
   }
 
-  class DefaultSqlProvider {
+  final class DefaultSqlProvider {
     public static String getUserUsingProvider() {
       return "SELECT id, name, 'DEFAULT' as databaseName FROM users WHERE id = #{id}";
     }

src/test/java/org/apache/ibatis/submitted/serializecircular/UtilityTester.java

@@ -1,5 +1,5 @@
 /*
- *    Copyright 2009-2023 the original author or authors.
+ *    Copyright 2009-2024 the original author or authors.
  *
  *    Licensed under the Apache License, Version 2.0 (the "License");
  *    you may not use this file except in compliance with the License.
@@ -21,7 +21,7 @@
 import java.io.ObjectInputStream;
 import java.io.ObjectOutputStream;
 
-public class UtilityTester {
+public final class UtilityTester {
 
   public static void serializeAndDeserializeObject(Object myObject) {
 

src/test/java/org/apache/ibatis/submitted/sqlprovider/ProviderMethodResolutionTest.java

@@ -164,7 +164,7 @@ public static String provideSelect2Sql() {
       }
     }
 
-    class ReservedMethodNameBasedSqlProvider {
+    final class ReservedMethodNameBasedSqlProvider {
       public static String provideSql() {
         return "DELETE FROM memos WHERE id = 1";
       }
@@ -246,7 +246,7 @@ interface ReservedNameMethodIsNoneMapper {
     @UpdateProvider(type = SqlProvider.class)
     int update();
 
-    class SqlProvider {
+    final class SqlProvider {
       public static String select() {
         return "SELECT 1 FROM INFORMATION_SCHEMA.SYSTEM_USERS";
       }

src/test/java/org/apache/ibatis/submitted/sqlprovider/SqlProviderTest.java

@@ -707,7 +707,7 @@ public interface DefaultSqlProviderMapper {
     @DeleteProvider
     void delete(int id);
 
-    class SqlProvider {
+    final class SqlProvider {
 
       public static String provideSql(ProviderContext c) {
         return switch (c.getMapperMethod().getName()) {
@@ -840,7 +840,7 @@ public interface StaticMethodSqlProviderMapper {
     String multipleMap(@Param("map1") Map<String, Object> map1, @Param("map2") Map<String, Object> map2);
 
     @SuppressWarnings("unused")
-    class SqlProvider {
+    final class SqlProvider {
 
       public static String noArgument() {
         return "SELECT 1 FROM INFORMATION_SCHEMA.SYSTEM_USERS";
@@ -989,7 +989,7 @@ interface DatabaseIdMapper {
     String selectDatabaseId();
 
     @SuppressWarnings("unused")
-    class SqlProvider {
+    final class SqlProvider {
       public static String provideSql(ProviderContext context) {
         if ("hsql".equals(context.getDatabaseId())) {
           return "SELECT '" + context.getDatabaseId() + "' FROM INFORMATION_SCHEMA.SYSTEM_USERS";

src/test/java/org/apache/ibatis/testcontainers/MysqlContainer.java

@@ -24,7 +24,7 @@
 import org.testcontainers.junit.jupiter.Testcontainers;
 
 @Testcontainers
-public class MysqlContainer {
+public final class MysqlContainer {
 
   private static final String DB_NAME = "mybatis_test";
   private static final String USERNAME = "u";

src/test/java/org/apache/ibatis/testcontainers/PgContainer.java

@@ -1,5 +1,5 @@
 /*
- *    Copyright 2009-2023 the original author or authors.
+ *    Copyright 2009-2024 the original author or authors.
  *
  *    Licensed under the Apache License, Version 2.0 (the "License");
  *    you may not use this file except in compliance with the License.
@@ -20,7 +20,7 @@
 import org.apache.ibatis.datasource.unpooled.UnpooledDataSource;
 import org.testcontainers.containers.PostgreSQLContainer;
 
-public class PgContainer {
+public final class PgContainer {
 
   private static final String DB_NAME = "mybatis_test";
   private static final String USERNAME = "u";