BUG Fix ApcuCache and MemCache namespace

src/Core/Cache/ApcuCacheFactory.php

@@ -27,9 +27,13 @@ class ApcuCacheFactory implements CacheFactory
      */
     public function create($service, array $params = array())
     {
-        return Injector::inst()->create(ApcuCache::class, false, [
-            (isset($args['namespace'])) ? $args['namespace'] : '',
-            (isset($args['defaultLifetime'])) ? $args['defaultLifetime'] : 0,
+        $namespace = isset($params['namespace'])
+            ? $params['namespace'] . '_' . md5(BASE_PATH)
+            : md5(BASE_PATH);
+        $defaultLifetime = isset($params['defaultLifetime']) ? $params['defaultLifetime'] : 0;
+        return Injector::inst()->createWithArgs(ApcuCache::class, [
+            $namespace,
+            $defaultLifetime,
             $this->version
         ]);
     }

src/Core/Cache/DefaultCacheFactory.php

@@ -71,7 +71,8 @@ class DefaultCacheFactory implements CacheFactory
         }
 
         // Chain this cache with ApcuCache
-        $apcu = $this->createCache(ApcuCache::class, [$namespace, (int) $defaultLifetime / 5, $version]);
+        $apcuNamespace = $namespace . ($namespace ? '_' : '') . md5(BASE_PATH);
+        $apcu = $this->createCache(ApcuCache::class, [$apcuNamespace, (int) $defaultLifetime / 5, $version]);
         return $this->createCache(ChainCache::class, [[$apcu, $fs]]);
     }
 

src/Core/Cache/MemcachedCacheFactory.php

@@ -17,7 +17,7 @@ class MemcachedCacheFactory implements CacheFactory
     /**
      * @param Memcached $memcachedClient
      */
-    public function __construct(Memcached $memcachedClient)
+    public function __construct(Memcached $memcachedClient = null)
     {
         $this->memcachedClient = $memcachedClient;
     }
@@ -27,10 +27,14 @@ class MemcachedCacheFactory implements CacheFactory
      */
     public function create($service, array $params = array())
     {
-        return Injector::inst()->create(MemcachedCache::class, false, [
+        $namespace = isset($params['namespace'])
+            ? $params['namespace'] . '_' . md5(BASE_PATH)
+            : md5(BASE_PATH);
+        $defaultLifetime = isset($params['defaultLifetime']) ? $params['defaultLifetime'] : 0;
+        return Injector::inst()->createWithArgs(MemcachedCache::class, [
             $this->memcachedClient,
-            (isset($args['namespace'])) ? $args['namespace'] : '',
-            (isset($args['defaultLifetime'])) ? $args['defaultLifetime'] : 0
+            $namespace,
+            $defaultLifetime
         ]);
     }
 }

tests/php/Core/Cache/CacheTest.php

@@ -0,0 +1,88 @@
+<?php
+
+namespace SilverStripe\Core\Tests\Cache;
+
+use Psr\SimpleCache\CacheInterface;
+use SilverStripe\Core\Cache\ApcuCacheFactory;
+use SilverStripe\Core\Cache\MemcachedCacheFactory;
+use SilverStripe\Core\Config\Config;
+use SilverStripe\Core\Injector\Injector;
+use SilverStripe\Core\Test\Cache\CacheTest\MockCache;
+use SilverStripe\Dev\SapphireTest;
+use Symfony\Component\Cache\Simple\ApcuCache;
+use Symfony\Component\Cache\Simple\MemcachedCache;
+
+class CacheTest extends SapphireTest
+{
+    protected function setUp()
+    {
+        parent::setUp();
+
+        Config::modify()
+            ->set(
+                Injector::class,
+                ApcuCacheFactory::class,
+                [
+                    'constructor' => [ 'version' => 4400 ]
+                ]
+            )
+            ->set(
+                Injector::class,
+                CacheInterface::class . '.TestApcuCache',
+                [
+                    'factory' => ApcuCacheFactory::class,
+                    'constructor' => [
+                        'namespace' => 'TestApcuCache',
+                        'defaultLifetime' => 2600,
+                    ],
+                ]
+            )
+            ->set(
+                Injector::class,
+                CacheInterface::class . '.TestMemcache',
+                [
+                    'factory' => MemcachedCacheFactory::class,
+                    'constructor' => [
+                        'namespace' => 'TestMemCache',
+                        'defaultLifetime' => 5600,
+                    ],
+                ]
+            )
+            ->set(Injector::class, ApcuCache::class, MockCache::class)
+            ->set(Injector::class, MemcachedCache::class, MockCache::class);
+    }
+
+    public function testApcuCacheFactory()
+    {
+        $cache = Injector::inst()->get(CacheInterface::class .'.TestApcuCache');
+        $this->assertInstanceOf(
+            MockCache::class,
+            $cache
+        );
+        $this->assertEquals(
+            [
+                'TestApcuCache_'.md5(BASE_PATH),
+                2600,
+                4400
+            ],
+            $cache->getArgs()
+        );
+    }
+
+    public function testMemCacheFactory()
+    {
+        $cache = Injector::inst()->get(CacheInterface::class .'.TestMemcache');
+        $this->assertInstanceOf(
+            MockCache::class,
+            $cache
+        );
+        $this->assertEquals(
+            [
+                null,
+                'TestMemCache_'.md5(BASE_PATH),
+                5600
+            ],
+            $cache->getArgs()
+        );
+    }
+}

tests/php/Core/Cache/CacheTest/MockCache.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace SilverStripe\Core\Test\Cache\CacheTest;
+
+use SilverStripe\Dev\TestOnly;
+
+class MockCache implements TestOnly
+{
+    protected $args = [];
+
+    public function __construct()
+    {
+        $this->args = func_get_args();
+    }
+
+    /**
+     * Get constructor args
+     *
+     * @return array
+     */
+    public function getArgs()
+    {
+        return $this->args;
+    }
+}