[TESTS] Add tests for the bitmap utility and fix implementation

tests/Util/BitmapTest.php

@@ -0,0 +1,59 @@
+<?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;
+
+use Symfony\Bundle\FrameworkBundle\Test\KernelTestCase;
+
+class FooBitmap extends \App\Util\Bitmap
+{
+    public const FOO  = 1;
+    public const BAR  = 2;
+    public const QUUX = 4;
+}
+
+class BarBitmap extends \App\Util\Bitmap
+{
+    public const HYDROGEN = 1;
+    public const HELIUM   = 2;
+    public const PREFIX   = 'BAR_';
+}
+
+class BitmapTest extends KernelTestCase
+{
+    public function testObj()
+    {
+        $a = FooBitmap::create(FooBitmap::FOO | FooBitmap::BAR);
+        static::assertTrue($a->foo);
+        static::assertTrue($a->bar);
+        static::assertFalse($a->quux);
+    }
+
+    public function testArray()
+    {
+        $b = FooBitmap::toArray(FooBitmap::FOO | FooBitmap::QUUX);
+        static::assertSame(['FOO', 'QUUX'], $b);
+    }
+
+    public function testPrefix()
+    {
+        $b = BarBitmap::toArray(BarBitmap::HYDROGEN | BarBitmap::HELIUM);
+        static::assertSame(['BAR_HYDROGEN', 'BAR_HELIUM'], $b);
+    }
+}