text: const MeanSquareError = require("./MeanSquareError.js");
  
  test("MeanSquareError function exists", () => {
    expect(typeof MeanSquareError).toEqual("function");
  });
  
  test("Should output the average of squared absolute value difference between each member pair of two arrs", () => {
    const res = MeanSquareError([10, 20, 10, 2], [10, 25, 5, -2]);
    expect(res).toEqual(16.5);
  });
  