public function testCustomizations()
 {
     $progress = new ProgressHelper();
     $progress->setBarWidth(10);
     $progress->setBarCharacter('_');
     $progress->setEmptyBarCharacter(' ');
     $progress->setProgressCharacter('/');
     $progress->setFormat(' %current%/%max% [%bar%] %percent%%');
     $progress->start($output = $this->getOutputStream(), 10);
     $progress->advance();
     rewind($output->getStream());
     $this->assertEquals($this->generateOutput('  1/10 [_/        ]  10%'), stream_get_contents($output->getStream()));
 }