public function testHeartbeat()
{
$this->eventContainer->add(new \Iqu\Sdk\Event\Heartbeat($this->identifiers));
$this->assertTrue($this->transportContainer->send($this->eventContainer));
$data = $this->readTmpFiles();
$data = json_decode(array_shift($data));
$this->assertEquals(getenv('API_KEY'), $data->api_key);
$this->assertEquals(1, sizeof($data->data));
$eventData = array_shift($data->data);
$this->assertAttributeEquals($this->uniqueSdkId, 'iqu_sdk_id', $eventData->identifiers);
$this->assertEquals('heartbeat', $eventData->event->type);
$this->assertGreaterThanOrEqual($this->startTime, strtotime($eventData->event->timestamp));
}
