Add an implementation just for php 7.0

php 7 does not have the void return type.

Author: greg0ire

Legacy/TestRunnerForV6.php

@@ -24,7 +24,7 @@ class TestRunnerForV6 extends BaseRunner
     /**
      * {@inheritdoc}
      */
-    protected function handleConfiguration(array &$arguments): void
+    protected function handleConfiguration(array &$arguments)
     {
         $listener = new SymfonyTestsListener();
 

Legacy/TestRunnerForV7.php

@@ -0,0 +1,49 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Bridge\PhpUnit\Legacy;
+
+use PHPUnit\TextUI\TestRunner as BaseRunner;
+use Symfony\Bridge\PhpUnit\SymfonyTestsListener;
+
+/**
+ * {@inheritdoc}
+ *
+ * @internal
+ */
+class TestRunnerForV7 extends BaseRunner
+{
+    /**
+     * {@inheritdoc}
+     */
+    protected function handleConfiguration(array &$arguments): void
+    {
+        $listener = new SymfonyTestsListener();
+
+        parent::handleConfiguration($arguments);
+
+        $arguments['listeners'] = isset($arguments['listeners']) ? $arguments['listeners'] : array();
+
+        $registeredLocally = false;
+
+        foreach ($arguments['listeners'] as $registeredListener) {
+            if ($registeredListener instanceof SymfonyTestsListener) {
+                $registeredListener->globalListenerDisabled();
+                $registeredLocally = true;
+                break;
+            }
+        }
+
+        if (!$registeredLocally) {
+            $arguments['listeners'][] = $listener;
+        }
+    }
+}

TextUI/TestRunner.php

@@ -13,8 +13,10 @@
 
 if (class_exists('PHPUnit_Runner_Version') && version_compare(\PHPUnit_Runner_Version::id(), '6.0.0', '<')) {
     class_alias('Symfony\Bridge\PhpUnit\Legacy\TestRunnerForV5', 'Symfony\Bridge\PhpUnit\TextUI\TestRunner');
-} else {
+} elseif (class_exists('PHPUnit_Runner_Version') && version_compare(\PHPUnit_Runner_Version::id(), '7.0.0', '<')) {
     class_alias('Symfony\Bridge\PhpUnit\Legacy\TestRunnerForV6', 'Symfony\Bridge\PhpUnit\TextUI\TestRunner');
+} else {
+    class_alias('Symfony\Bridge\PhpUnit\Legacy\TestRunnerForV7', 'Symfony\Bridge\PhpUnit\TextUI\TestRunner');
 }
 
 if (false) {