feat(testing): add a trait to flush the formatter cache in tests (#3811)

framework/core/tests/integration/extenders/FormatterTest.php

@@ -11,16 +11,16 @@
 
 use Flarum\Extend;
 use Flarum\Formatter\Formatter;
+use Flarum\Testing\integration\RefreshesFormatterCache;
 use Flarum\Testing\integration\TestCase;
 
 class FormatterTest extends TestCase
 {
+    use RefreshesFormatterCache;
+
     protected function getFormatter()
     {
-        $formatter = $this->app()->getContainer()->make(Formatter::class);
-        $formatter->flush();
-
-        return $formatter;
+        return $this->app()->getContainer()->make(Formatter::class);
     }
 
     /**

php-packages/testing/src/integration/RefreshesFormatterCache.php

@@ -0,0 +1,22 @@
+<?php
+
+/*
+ * This file is part of Flarum.
+ *
+ * For detailed copyright and license information, please view the
+ * LICENSE file that was distributed with this source code.
+ */
+
+namespace Flarum\Testing\integration;
+
+use Flarum\Formatter\Formatter;
+
+trait RefreshesFormatterCache
+{
+    protected function tearDown(): void
+    {
+        $this->app()->getContainer()->make(Formatter::class)->flush();
+
+        parent::tearDown();
+    }
+}