public function itShouldSaveWithCustomExtension()
{
$this->fileSystem->setFileExtension('hobbes');
$calvin = $this->_getClassMetadataMock('Calvin');
$this->fileSystem->insert($calvin, 1, 'Spaceman Spiff');
$this->assertTrue(is_file(__DIR__ . '/../Workspace/Calvin/1.hobbes'));
$this->assertEquals('Spaceman Spiff', file_get_contents(__DIR__ . '/../Workspace/Calvin/1.hobbes'));
@unlink(__DIR__ . '/../Workspace/Calvin/1.hobbes');
@rmdir(__DIR__ . '/../Workspace/Calvin');
}