compatibility with phpunit8

Author: garak

Test/ConstraintValidatorTestCase.php

@@ -29,6 +29,8 @@
  */
 abstract class ConstraintValidatorTestCase extends TestCase
 {
+    use TestCaseSetUpTearDownTrait;
+
     /**
      * @var ExecutionContextInterface
      */
@@ -48,7 +50,7 @@ abstract class ConstraintValidatorTestCase extends TestCase
     protected $constraint;
     protected $defaultTimezone;
 
-    protected function setUp()
+    private function doSetUp()
     {
         $this->group = 'MyGroup';
         $this->metadata = null;
@@ -70,7 +72,7 @@ protected function setUp()
         $this->setDefaultTimezone('UTC');
     }
 
-    protected function tearDown()
+    private function doTearDown()
     {
         $this->restoreDefaultTimezone();
     }

Test/TestCaseSetUpTearDownTrait.php

@@ -0,0 +1,82 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Validator\Test;
+
+use PHPUnit\Framework\TestCase;
+
+// Auto-adapt to PHPUnit 8 that added a `void` return-type to the setUp/tearDown methods
+
+if (method_exists(\ReflectionMethod::class, 'hasReturnType') && (new \ReflectionMethod(TestCase::class, 'tearDown'))->hasReturnType()) {
+    eval('
+    namespace Symfony\Component\Validator\Test;
+
+    /**
+     * @internal
+     */
+    trait TestCaseSetUpTearDownTrait
+    {
+        private function doSetUp(): void
+        {
+        }
+
+        private function doTearDown(): void
+        {
+        }
+    
+        protected function setUp(): void
+        {
+            $this->doSetUp();
+        }
+        
+        protected function tearDown(): void
+        {
+            $this->doTearDown();
+        }
+    }
+');
+} else {
+    /**
+     * @internal
+     */
+    trait TestCaseSetUpTearDownTrait
+    {
+        /**
+         * @return void
+         */
+        private function doSetUp()
+        {
+        }
+
+        /**
+         * @return void
+         */
+        private function doTearDown()
+        {
+        }
+
+        /**
+         * @return void
+         */
+        protected function setUp()
+        {
+            $this->doSetUp();
+        }
+
+        /**
+         * @return void
+         */
+        protected function tearDown()
+        {
+            $this->doTearDown();
+        }
+    }
+}