PliWould/lib/__tests__/product-test.ts

import { Product } from "../product";

describe("Product tests", () => {

  it(`Length product gives correct price for a shorter length`, () => {
    const standard = new Product(20, { l: 4, u: "feet" });
    const comparison = standard.priceFor({ l: 2, u: "feet" });
    expect(comparison).toEqual(10);
  });

  it(`Length product gives correct price for a longer length`, () => {
    const standard = new Product(20, {l: 4, u : "feet"});
    const comparison = standard.priceFor({l : 8, u : "feet"});
    expect(comparison).toEqual(40);
  });

  it(`Length product gives correct price if different units`, () => {
    const standard = new Product(10, {l: 1, u : "feet"});
    const comparison = standard.priceFor({l : 24, u: "inch"});
    expect(comparison).toBeCloseTo(20, 4);
  });
});