formatnumber.test.js

  it("should add the country when number starts with 9", () => {
    expect(formatNumber("943434")("260")).toEqual("260 943434");
  });

  it("should format even if the code existed", () => {
    expect(formatNumber("+260943434")("260")).toEqual("260 943434");
  }); 

  it("should format even if number is spaced out", () => {
    expect(formatNumber("+260 943434")("260")).toEqual("260 943434");
  });