function test_createdAt()
 {
     $result = Braintree_Customer::create(array('creditCard' => array('cardholderName' => 'Joe Smith', 'number' => '4000111111111115', 'expirationDate' => '12/2016', 'options' => array('verifyCard' => true))));
     $verification = $result->creditCardVerification;
     $past = clone $verification->createdAt;
     $past->modify('-1 hour');
     $future = clone $verification->createdAt;
     $future->modify('+1 hour');
     $collection = Braintree_CreditCardVerification::search(array(Braintree_CreditCardVerificationSearch::id()->is($verification->id), Braintree_CreditCardVerificationSearch::createdAt()->between($past, $future)));
     $this->assertEquals(1, $collection->maximumCount());
     $this->assertEquals($verification->id, $collection->firstItem()->id);
     $collection = Braintree_CreditCardVerification::search(array(Braintree_CreditCardVerificationSearch::id()->is($verification->id), Braintree_CreditCardVerificationSearch::createdAt()->lessThanOrEqualTo($future)));
     $this->assertEquals(1, $collection->maximumCount());
     $this->assertEquals($verification->id, $collection->firstItem()->id);
     $collection = Braintree_CreditCardVerification::search(array(Braintree_CreditCardVerificationSearch::id()->is($verification->id), Braintree_CreditCardVerificationSearch::createdAt()->greaterThanOrEqualTo($past)));
     $this->assertEquals(1, $collection->maximumCount());
     $this->assertEquals($verification->id, $collection->firstItem()->id);
 }