function test_rangeNode_failedAt()
 {
     $transaction = Braintree_Transaction::sale(array('amount' => '3000.00', 'creditCard' => array('number' => '4111111111111111', 'expirationDate' => '05/12')))->transaction;
     $twenty_min_ago = date_create("now -20 minutes", new DateTimeZone("UTC"));
     $ten_min_ago = date_create("now -10 minutes", new DateTimeZone("UTC"));
     $ten_min_from_now = date_create("now +10 minutes", new DateTimeZone("UTC"));
     $collection = Braintree_Transaction::search(array(Braintree_TransactionSearch::id()->is($transaction->id), Braintree_TransactionSearch::failedAt()->between($twenty_min_ago, $ten_min_ago)));
     $this->assertEquals(0, $collection->maximumCount());
     $collection = Braintree_Transaction::search(array(Braintree_TransactionSearch::id()->is($transaction->id), Braintree_TransactionSearch::failedAt()->between($ten_min_ago, $ten_min_from_now)));
     $this->assertEquals(1, $collection->maximumCount());
     $this->assertEquals($transaction->id, $collection->firstItem()->id);
 }