Merge branch 'sheridans-master'

src/Repository/Pdo/AbstractRepository.php

@@ -39,6 +39,10 @@ public function __construct(\PDO $pdo)
      */
     protected function scopesToString(array $scopes) : string
     {
+        if (empty($scopes)) {
+            return '';
+        }
+
         return trim(array_reduce($scopes, function ($result, $item) {
             return $result . ' ' . $item->getIdentifier();
         }));

test/Repository/Pdo/AbstractRepositoryTest.php

@@ -0,0 +1,41 @@
+<?php
+/**
+ * @see       https://github.com/zendframework/zend-expressive-authentication-oauth2 for the canonical source repository
+ * @copyright Copyright (c) 2017 Zend Technologies USA Inc. (https://www.zend.com)
+ * @license   https://github.com/zendframework/zend-expressive-authentication-oauth2/blob/master/LICENSE.md
+ *     New BSD License
+ */
+
+declare(strict_types=1);
+
+namespace ZendTest\Expressive\Authentication\OAuth2\Repository\Pdo;
+
+use PHPUnit\Framework\TestCase;
+use Zend\Expressive\Authentication\OAuth2\Repository\Pdo\AbstractRepository;
+use Zend\Expressive\Authentication\OAuth2\Repository\Pdo\PdoService;
+
+class AbstractRepositoryTest extends TestCase
+{
+    public function setUp()
+    {
+        $this->pdo = $this->prophesize(PdoService::class);
+    }
+
+    public function testConstructor()
+    {
+        $abstract = new AbstractRepository($this->pdo->reveal());
+        $this->assertInstanceOf(AbstractRepository::class, $abstract);
+    }
+
+    public function testScopesToString()
+    {
+        $proxy = new class($this->pdo->reveal()) extends AbstractRepository {
+            public function scopesToString(array $scopes): string
+            {
+                return parent::scopesToString($scopes);
+            }
+        };
+        $result = $proxy->scopesToString([]);
+        $this->assertEquals('', $result);
+    }
+}