Update BxmlTest.php

Author: brianluisgomez

tests/BxmlTest.php

@@ -354,17 +354,17 @@ public function testStopRecording() {
     public function testStartStream() {
         $startStream = new BandwidthLib\Voice\Bxml\StartStream();
         $startStream->name("test");
+        $startStream->tracks("inbound");
         $startStream->destination("https://url.com");
         $startStream->streamEventMethod("POST");
         $startStream->username("user");
         $startStream->password("pass");
         $startStream->streamEventUrl("https://url.com");
-   
 
         $response = new BandwidthLib\Voice\Bxml\Response();
         $response->addVerb($startStream);
 
-        $expectedXml = '<?xml version="1.0" encoding="UTF-8"?><Response><StartStream destination="https://url.com" name="test" username="user" *** streamEventUrl="https://url.com" streamEventMethod="POST"/></Response>';
+        $expectedXml = '<?xml version="1.0" encoding="UTF-8"?><Response><StartStream destination="https://url.com" name="test" tracks="inbound" username="user" *** streamEventUrl="https://url.com" streamEventMethod="POST"/></Response>';
         $responseXml = $response->toBxml();
         $this->assertEquals($expectedXml, $responseXml);
     }