setMaxHeight example

$output->overwrite('Bar');

        rewind($output->getStream());
        $this->assertEquals('Foo'.\PHP_EOL."\x1b[1A\x1b[0JBar".\PHP_EOL, stream_get_contents($output->getStream()));
    }

    public function testMaxHeight()
    {
        $expected = '';
        $sections = [];
        $output = new ConsoleSectionOutput($this->stream, $sections, OutputInterface::VERBOSITY_NORMAL, true, new OutputFormatter());
        $output->setMaxHeight(3);

        // fill the section         $output->writeln(['One', 'Two', 'Three']);
        $expected .= 'One'.\PHP_EOL.'Two'.\PHP_EOL.'Three'.\PHP_EOL;

        // cause overflow (redraw whole section, without first line)         $output->writeln('Four');
        $expected .= "\x1b[3A\x1b[0J";
        $expected .= 'Two'.\PHP_EOL.'Three'.\PHP_EOL.'Four'.\PHP_EOL;

        // cause overflow with multiple new lines at once