text: const string = require("../string");
  
  describe("String", () => {
    it('will concatenate values using "concat"', () => {
      expect(string.concat(["a", "b", "c"])).toBe("abc");
    });
    it('will lowercase values using "lowercase", "downcase"', () => {
      expect(string.lowercase(["ExamplE"])).toBe("example");
      expect(string.downcase(["ExamplE"])).toBe("example");
    });
    it('will uppercase values using "uppercase", "upcase"', () => {
      expect(string.uppercase(["ExamplE"])).toBe("EXAMPLE");
      expect(string.upcase(["ExamplE"])).toBe("EXAMPLE");
    });
  });
  