function test_findDuplicateCardsGivenPaymentMethodToken()
 {
     $creditCardRequest = array('number' => '63049580000009', 'expirationDate' => '05/2012');
     $jim = Braintree_Customer::create(array('firstName' => 'Jim', 'creditCard' => $creditCardRequest))->customer;
     $joe = Braintree_Customer::create(array('firstName' => 'Joe', 'creditCard' => $creditCardRequest))->customer;
     $query = array(Braintree_CustomerSearch::paymentMethodTokenWithDuplicates()->is($jim->creditCards[0]->token));
     $collection = Braintree_Customer::search($query);
     $customerIds = array();
     foreach ($collection as $customer) {
         $customerIds[] = $customer->id;
     }
     $this->assertTrue(in_array($jim->id, $customerIds));
     $this->assertTrue(in_array($joe->id, $customerIds));
 }