/**
* Tests whether setting the source succeeds.
*
* @return void
*/
public function testSource()
{
$this->assertEquals('', $this->fixture->getSource());
file_put_contents('/tmp/test_structure.xml', '<structure></structure>');
$this->fixture->setSource('/tmp/test_structure.xml');
$this->assertInstanceOf('DOMDocument', $this->fixture->getSource());
// directories are not allowed
$this->setExpectedException('Exception');
$this->fixture->setSource('/tmp');
// unknown directories are not allowed
$this->setExpectedException('Exception');
$this->fixture->setSource('/tmpa');
$this->markTestIncomplete('We still need to test the structure.xml changes that are induced ' . 'by the addMetaDataToStructure method');
}