public function testSet()
{
$file = new File(uniqid('.test_'));
$this->assertFalse($file->exists());
$file->createNewFile();
$this->assertTrue($file->exists());
$this->assertTrue($file->isReadable());
$this->assertTrue($file->isWritable());
$this->assertFalse($file->isExecutable());
$file->setReadable(true);
$file->setWritable(true);
$file->setExecutable(true);
// var_dump($file->isReadable());
// var_dump($file->isWritable());
// var_dump($file->isExecutable());
}