rollup/test/cli/config-cwd-case-insensitive/_config.js

var os = require( 'os' );

function toggleCase ( s ) {
  return ( s == s.toLowerCase() ) ? s.toUpperCase() : s.toLowerCase();
}

module.exports = {
  skip: os.platform() !== 'win32',
	description: "can load config with cwd that doesn't match realpath",
	command: 'rollup -c',
  cwd: process.cwd().replace( /^[A-Z]:\\/ig, toggleCase ),
	execute: true
};