From a7f303c573c3634d26fd07bd10bd94a3124e4f89 Mon Sep 17 00:00:00 2001
From: chadicus <chadwickgray@gmail.com>
Date: Sun, 23 Sep 2018 09:21:13 -0400
Subject: [PATCH] Allow InMemoryCache to be constructed with ArrayObject

---
 src/InMemoryCache.php       | 17 ++++++++++++++---
 tests/InMemoryCacheTest.php | 29 ++++++++++++++++++++++-------
 2 files changed, 36 insertions(+), 10 deletions(-)

diff --git a/src/InMemoryCache.php b/src/InMemoryCache.php
index 635033e..ef227d6 100644
--- a/src/InMemoryCache.php
+++ b/src/InMemoryCache.php
@@ -2,6 +2,7 @@
 
 namespace SubjectivePHP\Psr\SimpleCache;
 
+use ArrayObject;
 use DateInterval;
 use DateTime;
 use Psr\SimpleCache\CacheInterface;
@@ -15,9 +16,19 @@ final class InMemoryCache implements CacheInterface
     use TTLValidatorTrait;
 
     /**
-     * @var array
+     * @var ArrayObject
      */
-    private $cache = [];
+    private $cache;
+
+    /**
+     * Construct a new instance of InMemoryCache.
+     *
+     * @param ArrayObject $cache Initial cache container.
+     */
+    public function __construct(ArrayObject $cache = null)
+    {
+        $this->cache = $cache ?? new ArrayObject();
+    }
 
     /**
      * Fetches a value from the cache.
@@ -155,7 +166,7 @@ public function deleteMultiple($keys)//@codingStandardsIgnoreLine Interface does
      */
     public function clear()//@codingStandardsIgnoreLine Interface does not define type-hints or return
     {
-        $this->cache = [];
+        $this->cache->exchangeArray([]);
         return true;
     }
 
diff --git a/tests/InMemoryCacheTest.php b/tests/InMemoryCacheTest.php
index 2cddc45..ae542d8 100644
--- a/tests/InMemoryCacheTest.php
+++ b/tests/InMemoryCacheTest.php
@@ -2,11 +2,13 @@
 
 namespace SubjectivePHPTest\Psr\SimpleCache;
 
+use ArrayObject;
 use DateTime;
 use SubjectivePHP\Psr\SimpleCache\InMemoryCache;
 
 /**
  * @coversDefaultClass \SubjectivePHP\Psr\SimpleCache\InMemoryCache
+ * @covers ::__construct
  * @covers ::<private>
  */
 final class InMemoryCacheTest extends \PHPUnit\Framework\TestCase
@@ -16,12 +18,18 @@ final class InMemoryCacheTest extends \PHPUnit\Framework\TestCase
      */
     private $cache;
 
+    /**
+     * @var ArrayObject
+     */
+    private $container;
+
     /**
      * @return void
      */
     public function setUp()
     {
-        $this->cache = new InMemoryCache();
+        $this->container = new ArrayObject();
+        $this->cache = new InMemoryCache($this->container);
     }
 
     /**
@@ -33,7 +41,7 @@ public function setUp()
     public function get()
     {
         $dateTime = new DateTime();
-        $this->cache->set('foo', $dateTime);
+        $this->container['foo'] = ['data' => $dateTime, 'expires' => PHP_INT_MAX];
         $this->assertEquals($dateTime, $this->cache->get('foo'));
     }
 
@@ -57,7 +65,7 @@ public function getKeyNotFound()
      */
     public function getExpired()
     {
-        $this->cache->set('foo', new DateTime(), -10);
+        $this->container['foo'] = ['data' => new DateTime(), 'expires' => -10];
         $this->assertNull($this->cache->get('foo'));
     }
 
@@ -90,7 +98,15 @@ public function setWithIntegerTTL()
     {
         $dateTime = new \DateTime();
         $this->assertTrue($this->cache->set('foo', $dateTime, 3600));
-        $this->assertEquals($dateTime, $this->cache->get('foo'));
+        $this->assertSame(
+            [
+                'foo' => [
+                    'data' => $dateTime,
+                    'expires' => time() + 3600,
+                ],
+            ],
+            $this->container->getArrayCopy()
+        );
     }
 
     /**
@@ -167,9 +183,8 @@ public function clear()
         $this->cache->set('baz', 'baz');
 
         $this->cache->clear();
-        $this->assertNull($this->cache->get('foo'));
-        $this->assertNull($this->cache->get('bar'));
-        $this->assertNull($this->cache->get('baz'));
+
+        $this->assertSame([], $this->container->getArrayCopy());
     }
 
     /**