Fix once and for all HHVM tests

Author: Geolim4

lib/Phpfastcache/Helper/TestHelper.php

@@ -255,7 +255,7 @@ public function accessInaccessibleMember($obj, $prop)
      */
     public function exceptionHandler(\Throwable $exception)
     {
-        if ($exception instanceof PhpfastcacheDriverCheckException || $exception->getPrevious() instanceof PhpfastcacheDriverCheckException) {
+        if ($exception instanceof PhpfastcacheDriverCheckException) {
             $this->printSkipText('A driver could not be initialized due to missing requirement: ' . $exception->getMessage());
             $this->exitCode = 0;
         } else {

tests/Mongodb.test.php

@@ -7,17 +7,25 @@
 
 use Phpfastcache\CacheManager;
 use Phpfastcache\Drivers\Mongodb\Config;
+use Phpfastcache\Exceptions\PhpfastcacheDriverCheckException;
 use Phpfastcache\Exceptions\phpFastCacheDriverException;
 use Phpfastcache\Helper\TestHelper;
 
 chdir(__DIR__);
 require_once __DIR__ . '/../vendor/autoload.php';
 $testHelper = new TestHelper('Mongodb driver');
-$cacheInstance = CacheManager::getInstance('Mongodb', new Config([
-  'databaseName' => 'pfc_test',
-  'username' => 'travis',
-  'password' => 'test',
-]));
+
+try{
+    $cacheInstance = CacheManager::getInstance('Mongodb', new Config([
+        'databaseName' => 'pfc_test',
+        'username' => 'travis',
+        'password' => 'test',
+    ]));
+}catch(PhpfastcacheDriverCheckException $exception){
+    $testHelper->exceptionHandler($exception);
+    $testHelper->terminateTest();
+}
+
 
 $cacheKey = str_shuffle(uniqid('pfc', true));
 $cacheValue = str_shuffle(uniqid('pfc', true));