Clean up test

Author: sebastianbergmann

tests/end-to-end/regression/2724-diff-pid-from-master-process.phpt renamed to tests/end-to-end/regression/2724-diff-pid-from-parent-process.phpt

@@ -7,46 +7,43 @@
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
  */
+use PHPUnit\Framework\TestCase;
+
 /**
  * @runClassInSeparateProcess
  */
-class SeparateClassRunMethodInNewProcessTest extends PHPUnit\Framework\TestCase
+final class SeparateClassRunMethodInNewProcessTest extends TestCase
 {
     public const PROCESS_ID_FILE_PATH = __DIR__ . '/parent_process_id.txt';
 
-    public const INITIAL_MASTER_PID = 0;
+    public const INITIAL_PARENT_PROCESS_ID = 0;
 
-    public const INITIAL_PID1 = 1;
+    public const INITIAL_PROCESS_ID = 1;
 
-    public static $masterPid = self::INITIAL_MASTER_PID;
+    public static $parentProcessId = self::INITIAL_PARENT_PROCESS_ID;
 
-    public static $pid1 = self::INITIAL_PID1;
+    public static $processId = self::INITIAL_PROCESS_ID;
 
     public static function setUpBeforeClass(): void
     {
-        parent::setUpBeforeClass();
-
         if (\file_exists(self::PROCESS_ID_FILE_PATH)) {
-            static::$masterPid = (int) \file_get_contents(self::PROCESS_ID_FILE_PATH);
+            self::$parentProcessId = (int) \file_get_contents(self::PROCESS_ID_FILE_PATH);
         }
     }
 
     public static function tearDownAfterClass(): void
     {
-        parent::tearDownAfterClass();
-
         if (\file_exists(self::PROCESS_ID_FILE_PATH)) {
             \unlink(self::PROCESS_ID_FILE_PATH);
         }
     }
 
-    public function testMethodShouldGetDifferentPidThanMaster(): void
+    public function testTestMethodIsRunInSeparateProcess(): void
     {
-        static::$pid1 = \getmypid();
-
-        $this->assertNotEquals(self::INITIAL_PID1, static::$pid1);
-        $this->assertNotEquals(self::INITIAL_MASTER_PID, static::$masterPid);
+        self::$processId = \getmypid();
 
-        $this->assertNotEquals(static::$pid1, static::$masterPid);
+        $this->assertNotSame(self::INITIAL_PROCESS_ID, self::$processId);
+        $this->assertNotSame(self::INITIAL_PARENT_PROCESS_ID, self::$parentProcessId);
+        $this->assertNotSame(self::$processId, self::$parentProcessId);
     }
 }