Introduce AbstractFileListTestCase and use it in ConstructTest.php

Author: rodrigoprimo

tests/Core/Files/FileList/AbstractFileListTestCase.php

@@ -0,0 +1,52 @@
+<?php
+/**
+ * Abstract testcase class for testing FileList methods.
+ *
+ * @copyright 2025 PHPCSStandards Contributors
+ * @license   https://github.com/PHPCSStandards/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
+ */
+
+namespace PHP_CodeSniffer\Tests\Core\Files\FileList;
+
+use PHP_CodeSniffer\Ruleset;
+use PHP_CodeSniffer\Tests\ConfigDouble;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Base functionality and utilities for testing FileList methods.
+ */
+abstract class AbstractFileListTestCase extends TestCase
+{
+
+    /**
+     * The Config object.
+     *
+     * @var \PHP_CodeSniffer\Config
+     */
+    protected static $config;
+
+    /**
+     * The Ruleset object.
+     *
+     * @var \PHP_CodeSniffer\Ruleset
+     */
+    protected static $ruleset;
+
+
+    /**
+     * Initialize the config and ruleset objects.
+     *
+     * @beforeClass
+     *
+     * @return void
+     */
+    public static function initializeConfigAndRuleset()
+    {
+        self::$config         = new ConfigDouble();
+        self::$config->filter = __DIR__.'/FilterDouble.php';
+        self::$ruleset        = new Ruleset(self::$config);
+
+    }//end initializeConfigAndRuleset()
+
+
+}//end class

tests/Core/Files/FileList/ConstructTest.php

@@ -9,49 +9,15 @@
 namespace PHP_CodeSniffer\Tests\Core\Files\FileList;
 
 use PHP_CodeSniffer\Files\FileList;
-use PHP_CodeSniffer\Tests\ConfigDouble;
-use PHPUnit\Framework\TestCase;
 
 /**
  * Tests for the \PHP_CodeSniffer\Files\FileList::__construct method.
  *
  * @covers \PHP_CodeSniffer\Files\FileList::__construct
  */
-final class ConstructTest extends TestCase
+final class ConstructTest extends AbstractFileListTestCase
 {
 
-    /**
-     * The Config object.
-     *
-     * @var \PHP_CodeSniffer\Config
-     */
-    private $config;
-
-    /**
-     * The Ruleset object.
-     *
-     * @var \PHP_CodeSniffer\Ruleset
-     */
-    private $ruleset;
-
-
-    /**
-     * Setup objects needed for the tests.
-     *
-     * @before
-     *
-     * @return void
-     */
-    protected function initializeConfigAndRuleset()
-    {
-        $this->config         = new ConfigDouble();
-        $this->config->filter = __DIR__.'/FilterDouble.php';
-        $this->ruleset        = $this->getMockBuilder('PHP_CodeSniffer\Ruleset')
-            ->disableOriginalConstructor()
-            ->getMock();
-
-    }//end initializeConfigAndRuleset()
-
 
     /**
      * Test the __construct() method.
@@ -65,12 +31,12 @@ protected function initializeConfigAndRuleset()
      */
     public function testConstruct($files, $expectedFiles)
     {
-        $this->config->files = $files;
+        self::$config->files = $files;
 
-        $fileList = new FileList($this->config, $this->ruleset);
+        $fileList = new FileList(self::$config, self::$ruleset);
 
-        $this->assertSame($this->config, $fileList->config, 'Config object mismatch');
-        $this->assertSame($this->ruleset, $fileList->ruleset, 'Ruleset object mismatch');
+        $this->assertSame(self::$config, $fileList->config, 'Config object mismatch');
+        $this->assertSame(self::$ruleset, $fileList->ruleset, 'Ruleset object mismatch');
 
         $this->assertCount(count($expectedFiles), $fileList, 'File count mismatch');