public function testSearch()
{
$commandTester = $this->getCommand(array('--format' => 'csv', 'search' => 'Innodb%'));
$display = $commandTester->getDisplay();
$this->assertContains('Innodb_buffer_pool_read_ahead_rnd', $display);
$this->assertContains('Innodb_buffer_pool_wait_free', $display);
$this->assertContains('InnoDB Buffer Pool hit', $display);
$this->assertContains('Innodb_dblwr_pages_written', $display);
$this->assertContains('Innodb_os_log_written', $display);
}