[TESTS] Add tests to all relevant methods under App\Util and fix errors that popup

tests/Util/Form/ArrayTransformerTest.php

@@ -0,0 +1,38 @@
+<?php
+
+// {{{ License
+// This file is part of GNU social - https://www.gnu.org/software/social
+//
+// GNU social is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// GNU social is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with GNU social.  If not, see <http://www.gnu.org/licenses/>.
+// }}}
+
+namespace App\Tests\Util\Form;
+
+use App\Util\Form\ArrayTransformer;
+use Symfony\Bundle\FrameworkBundle\Test\WebTestCase;
+
+class ArrayTransformerTest extends WebTestCase
+{
+    public function testTransform()
+    {
+        static::assertSame('', (new ArrayTransformer)->transform([]));
+        static::assertSame('foo bar quux', (new ArrayTransformer)->transform(['foo', 'bar', 'quux']));
+    }
+
+    public function testReverseTransform()
+    {
+        static::assertSame([], (new ArrayTransformer)->reverseTransform(''));
+        static::assertSame(['foo', 'bar', 'quux'], (new ArrayTransformer)->reverseTransform('foo bar quux'));
+    }
+}