text: const wave = require("./mexicanWave");
  
  describe("wave", () => {
    it("Will up-case the letter in the word in the array depending on the index", () => {
      expect(wave("hello")).toEqual([
        "Hello",
        "hEllo",
        "heLlo",
        "helLo",
        "hellO",
      ]);
    });
  });
  