import { Percent } from "entities/fractions/percent";

describe("Percent", () => {
  describe("constructor", () => {
    it("defaults to 1 denominator", () => {
      expect(new Percent(1)).toEqual(new Percent(1, 1));
    });
  });
  describe("#add", () => {
    it("returns a percent", () => {
      expect(new Percent(1, 100).add(new Percent(2, 100))).toEqual(
        new Percent(3, 100)
      );
    });
    it("different denominators", () => {
      expect(new Percent(1, 25).add(new Percent(2, 100))).toEqual(
        new Percent(150, 2500)
      );
    });
  });
  describe("#subtract", () => {
    it("returns a percent", () => {
      expect(new Percent(1, 100).subtract(new Percent(2, 100))).toEqual(
        new Percent(-1, 100)
      );
    });
    it("different denominators", () => {
      expect(new Percent(1, 25).subtract(new Percent(2, 100))).toEqual(
        new Percent(50, 2500)
      );
    });
  });
  describe("#multiply", () => {
    it("returns a percent", () => {
      expect(new Percent(1, 100).multiply(new Percent(2, 100))).toEqual(
        new Percent(2, 10000)
      );
    });
    it("different denominators", () => {
      expect(new Percent(1, 25).multiply(new Percent(2, 100))).toEqual(
        new Percent(2, 2500)
      );
    });
  });
  describe("#divide", () => {
    it("returns a percent", () => {
      expect(new Percent(1, 100).divide(new Percent(2, 100))).toEqual(
        new Percent(100, 200)
      );
    });
    it("different denominators", () => {
      expect(new Percent(1, 25).divide(new Percent(2, 100))).toEqual(
        new Percent(100, 50)
      );
    });
  });

  describe("#toSignificant", () => {
    it("returns the value scaled by 100", () => {
      expect(new Percent(154, 10_000).toSignificant(3)).toEqual("1.54");
    });
  });
  describe("#toFixed", () => {
    it("returns the value scaled by 100", () => {
      expect(new Percent(154, 10_000).toFixed(2)).toEqual("1.54");
    });
  });
});