Don't assume document PHP type mapping in FunctionalTestCase

tests/FunctionalTestCase.php

@@ -21,8 +21,9 @@ abstract class FunctionalTestCase extends TestCase
         list($databaseName, $collectionName) = explode('.', $namespace, 2);
 
         $cursor = $this->manager->executeCommand($databaseName, new Command(array('count' => $collectionName)));
-
+        $cursor->setTypeMap(array('document' => 'array'));
         $document = current($cursor->toArray());
+
         $this->assertArrayHasKey('n', $document);
         $this->assertEquals($count, $document['n']);
     }
@@ -45,6 +46,7 @@ abstract class FunctionalTestCase extends TestCase
             $readPreference ?: new ReadPreference(ReadPreference::RP_PRIMARY)
         );
 
+        $cursor->setTypeMap(array('document' => 'array'));
         $document = current($cursor->toArray());
 
         return $document['version'];