A simple implementation of RangeList using JavaScript list.
The class RangeList can be found in the file RangeList.js. Tests for RangeList can be found in RangeList.test.js. RangeList.test.js provides additional tests besides the original tests.
To run the unit tests, you first need to install jest using this command:
npm installAfter installing jest, enter this command:
npm testYou could add additional test cases to the file RangeList.test.js.