    public function testTransactionSearch()
    {
        $transactionSearch = $this->gateway->transactionSearch(array(
            'startDate' => '2015-01-01',
            'endDate' => '2015-12-31'
        ));

        $this->assertInstanceOf('\Omnipay\PayPal\Message\ExpressTransactionSearchRequest', $transactionSearch);
        $this->assertInstanceOf('\DateTime', $transactionSearch->getStartDate());
        $this->assertInstanceOf('\DateTime', $transactionSearch->getEndDate());
    }
The software constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component.