Maknz\Slack\Client::getDefaultIcon PHP Method

    public function getDefaultIcon()
    {
        return $this->icon;
    }

 public function testCreateMessage()
 {
     $defaults = ['channel' => '#random', 'username' => 'Archer', 'icon' => ':ghost:'];
     $client = new Client('http://fake.endpoint', $defaults);
     $message = $client->createMessage();
     $this->assertInstanceOf('Maknz\\Slack\\Message', $message);
     $this->assertSame($client->getDefaultChannel(), $message->getChannel());
     $this->assertSame($client->getDefaultUsername(), $message->getUsername());
     $this->assertSame($client->getDefaultIcon(), $message->getIcon());
 }