[Lock] Add tests for NullStore

Author: alexandre-daubois

Tests/Store/NullStoreTest.php

@@ -0,0 +1,37 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Lock\Tests\Store;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Lock\Key;
+use Symfony\Component\Lock\Store\NullStore;
+
+class NullStoreTest extends TestCase
+{
+    public function testExistsAlwaysReturnsFalse()
+    {
+        $store = new NullStore();
+        $key = new Key('foo');
+
+        $this->assertFalse($store->exists($key));
+    }
+
+    public function testSaveDoesNothing()
+    {
+        $store = new NullStore();
+        $key = new Key('foo');
+
+        $store->save($key);
+
+        $this->assertFalse($store->exists($key));
+    }
+}