Phrozn\Outputter\TestOutputter::stdout PHP Method

    public function stdout($msg, $status = self::STATUS_OK)
    {
        if (defined('STDOUT')) {
            fwrite(STDOUT, $msg);
        } else {
            $msg = Color::strip(Color::convert($msg));
            $this->lines[] = trim($msg);
        }
        return $this;
    }

 public function testAssertNotInLogsFail()
 {
     $this->setExpectedException('PHPUnit_Framework_AssertionFailedError', 'this should produce error');
     $outputter = new Outputter($this);
     $outputter->stdout('this string exists');
     $outputter->assertNotInLogs('this string exists', 'this should produce error');
 }