Added unit tests for new functionality

Author: Konstantinos Christofilos

tests/GatewayTest.php

@@ -24,6 +24,13 @@ public function setUp()
         );
     }
 
+    public function testFindCustomer()
+    {
+        $request = $this->gateway->findCustomer(1);
+        $this->assertInstanceOf('\Omnipay\Braintree\Message\FindCustomerRequest', $request);
+        $this->assertEquals(1, $request->getCustomerId());
+    }
+
     public function testAuthorize()
     {
         $request = $this->gateway->authorize(array('amount' => '10.00'));

tests/Message/FindCustomerRequestTest.php

@@ -0,0 +1,55 @@
+<?php
+namespace Omnipay\Braintree\Message;
+
+use Omnipay\Tests\TestCase;
+
+class FindCustomerRequestTest extends TestCase
+{
+    /**
+     * @var CreateCustomerRequest
+     */
+    private $request;
+
+    public function setUp()
+    {
+        parent::setUp();
+
+        $gateway = $this->buildMockGateway();
+        $this->request = new FindCustomerRequest($this->getHttpClient(), $this->getHttpRequest(), $gateway);
+        $this->request->initialize(array('customerId' => 1));
+    }
+
+    public function testGetData()
+    {
+        $data = $this->request->getData();
+        $this->assertNull($data);
+    }
+
+    public function testSendData()
+    {
+        $data = array();
+        $response = $this->request->sendData($data);
+
+        $this->assertInstanceOf('Omnipay\Braintree\Message\CustomerResponse', $response);
+    }
+
+    protected function buildMockGateway()
+    {
+        $gateway = $this->getMockBuilder('\Braintree_Gateway')
+            ->disableOriginalConstructor()
+            ->setMethods(array(
+                'customer'
+            ))
+            ->getMock();
+
+        $customer = $this->getMockBuilder('\Braintree_CustomerGateway')
+            ->disableOriginalConstructor()
+            ->getMock();
+
+        $gateway->expects($this->any())
+            ->method('customer')
+            ->will($this->returnValue($customer));
+
+        return $gateway;
+    }
+}