Update PR

app/code/core/Mage/Core/Model/Config.php

@@ -1698,6 +1698,21 @@ public function deleteConfig($path, $scope = 'default', $scopeId = 0)
         return $this;
     }
 
+
+    /**
+     * Get config value from DB
+     *
+     * @param   string $path
+     * @param   string $scope
+     * @param   int $scopeId
+     * @return  string|false
+     */
+    public function getConfig(string $path, string $scope = 'default', int $scopeId = 0)
+    {
+        $resource = $this->getResourceModel();
+        return $resource->getConfig(rtrim($path, '/'), $scope, $scopeId);
+    }
+
     /**
      * Get fieldset from configuration
      *

app/code/core/Mage/Core/Model/Resource/Config.php

@@ -216,7 +216,7 @@ public function deleteConfig($path, $scope, $scopeId)
      * @param int $scopeId
      * @return string|false
      */
-    public function getValue(string $path, string $scope = 'default', int $scopeId = 0)
+    public function getConfig(string $path, string $scope, int $scopeId)
     {
         $readAdapter = $this->_getReadAdapter();
         $select = $readAdapter->select()

dev/tests/unit/Mage/Core/Model/ConfigTest.php

@@ -0,0 +1,37 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OpenMage\Tests\Unit\Mage\Core\Model;
+
+use Mage;
+use Mage_Core_Model_Config;
+use PHPUnit\Framework\TestCase;
+
+class ConfigTest extends TestCase
+{
+    /**
+     * @var Mage_Core_Model_Config
+     */
+    public Mage_Core_Model_Config $subject;
+
+    public function setUp(): void
+    {
+        Mage::app();
+        $this->subject = Mage::getModel('core/config');
+    }
+
+    public function testSaveDeleteGetConfig(): void
+    {
+        $path = 'test/config';
+        $value = 'foo';
+
+        $this->assertFalse($this->subject->getConfig($path));
+
+        $this->subject->saveConfig($path, $value);
+        $this->assertEquals($value, $this->subject->getConfig($path));
+
+        $this->subject->deleteConfig($path);
+        $this->assertFalse($this->subject->getConfig($path));
+    }
+}