it('stops containing removing value even if it was sent not in upper case (only upper case list)', () => {
      expect(valueListOnlyUpper.includes(VaLuE.toUpperCase())).to.equal(true)
      valueListOnlyUpper.remove(vALue)
      expect(valueListOnlyUpper.includes(VaLuE.toUpperCase())).to.equal(false)
    })