public function testGetCustomer()
{
$createResponse = $this->customers->createCustomer();
$getResponse = $this->customers->getCustomer($createResponse->getId());
$this->assertInstanceOf(Customers::CUSTOMER_RESPONSE_CLASS, $getResponse);
$this->assertEquals($createResponse->getId(), $getResponse->getId());
$this->client->delete('customers/' . $getResponse->getId());
}