public function testDumpXml()
{
$process = $this->phpbench('run --dump-file=' . $this->fname . ' benchmarks/set4/NothingBench.php');
$this->assertExitCode(0, $process);
$output = $process->getOutput();
$this->assertContains('Dumped', $output);
$this->assertTrue(file_exists($this->fname));
}