Implement the ability for user-defined type casting

tests/ColumnFactoryTest.php

@@ -7,6 +7,7 @@
 use PHPUnit\Framework\Attributes\DataProviderExternal;
 use Yiisoft\Db\Constant\ColumnType;
 use Yiisoft\Db\Expression\Expression;
+use Yiisoft\Db\Mysql\Column\ColumnFactory;
 use Yiisoft\Db\Mysql\Tests\Provider\ColumnFactoryProvider;
 use Yiisoft\Db\Mysql\Tests\Support\TestTrait;
 use Yiisoft\Db\Schema\Column\ColumnInterface;
@@ -19,6 +20,11 @@ final class ColumnFactoryTest extends AbstractColumnFactoryTest
 {
     use TestTrait;
 
+    protected function getColumnFactoryClass(): string
+    {
+        return ColumnFactory::class;
+    }
+
     #[DataProviderExternal(ColumnFactoryProvider::class, 'dbTypes')]
     public function testFromDbType(string $dbType, string $expectedType, string $expectedInstanceOf): void
     {

tests/Support/TestTrait.php

@@ -71,7 +71,7 @@ public static function setUpBeforeClass(): void
         $db->close();
     }
 
-    private function getDriver(): PdoDriverInterface
+    protected function getDriver(): PdoDriverInterface
     {
         return new Driver($this->getDsn(), self::getUsername(), self::getPassword());
     }