old_contents: describe('Main', () => {
      it('should be true', () => {
          assert.isTrue(true);
          assert.equal('testjenkins', 'testjenkins');
      });
  });
  
new_contents: describe('Main', () => {
      it('should be true', () => {
          assert.isTrue(true);
      });
  });
  
subject: test jenkins 2