removes createDefaultCache method and fixes tests

Author: bshaffer

src/Google/Client.php

@@ -929,25 +929,9 @@ public function setCache(CacheInterface $cache)
    */
   public function getCache()
   {
-    if (!isset($this->cache)) {
-      $this->cache = $this->createDefaultCache();
-    }
-
     return $this->cache;
   }
 
-  protected function createDefaultCache()
-  {
-    if ($this->isAppEngine()) {
-      $cache = new Google_Cache_Memcache();
-    } else {
-      $cacheDir = sys_get_temp_dir() . '/google-api-php-client';
-      $cache = new Google_Cache_File($cacheDir);
-    }
-
-    return $cache;
-  }
-
   /**
    * Set the Logger object
    * @param Psr\Log\LoggerInterface $logger

tests/Google/ClientTest.php

@@ -254,6 +254,7 @@ public function testSettersGetters()
 
     $client->setRedirectUri('localhost');
     $client->setConfig('application_name', 'me');
+    $client->setCache(new Google_Cache_Null());
     $this->assertEquals('object', gettype($client->getCache()));
 
     try {
@@ -268,19 +269,6 @@ public function testSettersGetters()
     $this->assertEquals($token, $client->getAccessToken());
   }
 
-  /**
-   * @requires extension Memcached
-   */
-  public function testAppEngineMemcacheConfig()
-  {
-    $_SERVER['SERVER_SOFTWARE'] = 'Google App Engine';
-    $client = new Google_Client();
-
-    $this->assertInstanceOf('Google_Cache_Memcache', $client->getCache());
-
-    unset($_SERVER['SERVER_SOFTWARE']);
-  }
-
   public function testAppEngineStreamHandlerConfig()
   {
     $this->onlyGuzzle5();