Carew\Document::getVar PHP Method

    public function getVar($key, $default = null)
    {
        return array_key_exists($key, $this->vars) ? $this->vars[$key] : $default;
    }

 public function testGetSetVar()
 {
     $document = new Document();
     $this->assertSame(null, $document->getVar('foo'));
     $this->assertSame('default', $document->getVar('foo', 'default'));
     $document->setVar('foo', 'bar');
     $this->assertSame('bar', $document->getVar('foo'));
     $this->assertSame('bar', $document->getVar('foo', 'default'));
 }