public function testGetTitle()
{
$document = new Document(new File(new Path(self::simpleFileName)));
$this->assertInternalType('string', $document->getTitle());
$this->assertEquals('', $document->getTitle());
$document = new Document(new File(new Path(self::titleFileName)));
$this->assertEquals(['title' => 'Test'], $document->getHeader());
$this->assertInternalType('string', $document->getTitle());
$this->assertEquals('Test', $document->getTitle());
}