[CORE] Make tests great gain

tests/Core/UUIDTest.php

@@ -0,0 +1,58 @@
+<?php
+// 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 Tests\Unit;
+
+if (!defined('INSTALLDIR')) {
+    define('INSTALLDIR', dirname(dirname(__DIR__)));
+}
+if (!defined('GNUSOCIAL')) {
+    define('GNUSOCIAL', true);
+}
+if (!defined('STATUSNET')) { // Compatibility
+    define('STATUSNET', true);
+}
+
+use PHPUnit\Framework\TestCase;
+use UUID;
+
+require_once INSTALLDIR . '/lib/common.php';
+
+final class UUIDTest extends TestCase
+{
+    public function testGenerate()
+    {
+        $result = UUID::gen();
+        $this->assertRegExp('/^[0-9a-z]{8}-[0-9a-z]{4}-[0-9a-z]{4}-[0-9a-z]{4}-[0-9a-z]{12}$/',
+            $result);
+        // Check version number
+        $this->assertEquals(0x4000, hexdec(substr($result, 14, 4)) & 0xF000);
+        $this->assertEquals(0x8000, hexdec(substr($result, 19, 4)) & 0xC000);
+    }
+
+    public function testUnique()
+    {
+        $reps = 100;
+        $ids = array();
+
+        for ($i = 0; $i < $reps; $i++) {
+            $ids[] = UUID::gen();
+        }
+
+        $this->assertEquals(count($ids), count(array_unique($ids)), "UUIDs must be unique");
+    }
+}
+