function domainType(domains) {
  // Iterate over each domain name in array and get top-level domain
  topLevelDomains = [];

  for (let domain of domains){
    let domainSplit = domain.split('.');
    // Push last element in each domainSplit array to topLevelDomains
    for (let element of domainSplit){
      if (element == domainSplit[domainSplit.length - 1]){
        topLevelDomains.push(element);
      }
    }
  }

  // Iterate over topLevelDomains and assign appropriate labels
  let labels = [];

  for (let domain of topLevelDomains){
    switch(domain){
      case "org":
        labels.push("organization");
        break;
      
      case "com":
        labels.push("commercial");
        break;

      case "net":
        labels.push("network");
        break;
      
      case "info":
        labels.push("information");
        break;
    }
  }
  return labels;
}

/**
* Test Suite 
*/
describe('domainType()', () => {
    it('returns list of domain types', () => {
        // arrange
        const domains = ["en.wiki.org", "codefights.com", "happy.net", "code.info"];
        
        // act
        const result = domainType(domains);

        // log
        console.log("result: ", result);
        
        // assert
        expect(result).toEqual(["organization", "commercial", "network", "information"]);
    });
});