public function testNames()
{
$file = new File($this->root->url() . '/dir/composer.json');
$this->assertEquals('composer.json', $file->getFilename());
$this->assertEquals($this->root->url() . '/dir', $file->getDirname());
$this->assertEquals($this->root->url() . '/dir/composer.json', $file->getPathname());
$this->assertEquals($this->root->url() . '/dir/composer.json', '' . $file);
$this->assertEquals('json', $file->getExtension());
$dir = new Directory($this->root->url() . '/dir');
$this->assertEquals($this->root->url() . '/dir', '' . $dir);
$desc = new FileDescriptor($this->root->url() . '/dir/composer.json');
$this->assertEquals($this->root->url() . '/dir/composer.json', '' . $desc);
}