public function testGunzipExistingFile() { $file = $this->filename; File::gzip($file, $file . '.gz', true); File::gunzip($file . '.gz', $file . '.extracted.txt', true); $result = File::gunzip($file . '.gz', $file . '.extracted.txt', true); $this->assertTrue($result); if ($result) { File::delete($file . '.gz'); File::delete($file . '.extracted.txt'); } }