.then(results => {
   if (results.data) {
     let semver = new SemVersion(results.data);
     return semver.isValid() ? results.data : '';
   }
   return '';
 })

 it('should detect greater version properly', () => {
   let semver = new SemVersion(version);
   let cases = [
     {value: '3.4.5', expected: true},
     {value: '3.4.4', expected: true},
     {value: '3.4.6', expected: false},
     {value: '4', expected: false},
     {value: '3.5', expected: false},
   ];
   cases.forEach((testCase) => {
     expect(semver.isGtOrEq(testCase.value)).to.be(testCase.expected);
   });
 });

 cases.forEach((testCase) => {
   expect(semver.isGtOrEq(testCase.value)).to.be(testCase.expected);
 });