Merge pull request #41 from repzy/issue40_fix

fix issue #40

Author: repzy

src/Grphp/Client/Interceptors/Base.php

@@ -37,7 +37,7 @@ abstract class Base
     /** @var string */
     protected $method;
     /** @var array */
-    protected $metadata;
+    protected $metadata = [];
     /** @var BaseStub */
     protected $stub;
 

tests/Unit/Grphp/Client/Interceptors/TimerTest.php

@@ -0,0 +1,34 @@
+<?php
+
+/**
+ * Copyright (c) 2017-present, BigCommerce Pty. Ltd. All rights reserved
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
+ * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+ * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+declare(strict_types=1);
+
+namespace Unit\Grphp\Client\Interceptors;
+
+use Grphp\Client\Interceptors\Timer;
+use PHPUnit\Framework\TestCase;
+
+class TimerTest extends TestCase
+{
+    public function testMetadataReturnedAsArray()
+    {
+        $timer = new Timer([]);
+
+        $this->assertSame([], $timer->getMetadata());
+    }
+}