allergies.spec.js

import { Allergies } from './allergies';

describe('Allergies', () => {
  test('no allergies at all', () => {
    const allergies = new Allergies(0);
    expect(allergies.list()).toEqual([]);
  });

  test('allergies to eggs', () => {
    const allergies = new Allergies(1);
    expect(allergies.list()).toEqual(['eggs']);
  });

  test('allergies to peanuts', () => {
    const allergies = new Allergies(2);
    expect(allergies.list()).toEqual(['peanuts']);
  });

  test('allergies to strawberries', () => {
    const allergies = new Allergies(8);
    expect(allergies.list()).toEqual(['strawberries']);
  });

  test('allergies to eggs and peanuts', () => {
    const allergies = new Allergies(3);
    expect(allergies.list()).toEqual(['eggs', 'peanuts']);
  });

  test('allergies to more than eggs but not peanuts', () => {
    const allergies = new Allergies(5);
    expect(allergies.list()).toEqual(['eggs', 'shellfish']);
  });

  test('allergic to lots of stuff', () => {
    const allergies = new Allergies(248);
    expect(allergies.list()).toEqual(['strawberries', 'tomatoes', 'chocolate', 'pollen', 'cats']);
  });

  test('allergic to everything', () => {
    const allergies = new Allergies(255);
    expect(allergies.list()).toEqual(['eggs', 'peanuts', 'shellfish', 'strawberries', 'tomatoes', 'chocolate', 'pollen', 'cats']);
  });

  test('no allergic means not allergic', () => {
    const allergies = new Allergies(0);
    expect(allergies.allergicTo('peanuts')).toEqual(false);
    expect(allergies.allergicTo('cats')).toEqual(false);
    expect(allergies.allergicTo('strawberries')).toEqual(false);
  });

  test('allergic to eggs', () => {
    const allergies = new Allergies(1);
    expect(allergies.allergicTo('eggs')).toEqual(true);
  });

  test('allergic to eggs and other things', () => {
    const allergies = new Allergies(5);
    expect(allergies.allergicTo('eggs')).toEqual(true);
  });

  test('ignore non allergen score parts', () => {
    const allergies = new Allergies(509);
    expect(allergies.list()).toEqual(['eggs', 'shellfish', 'strawberries', 'tomatoes', 'chocolate', 'pollen', 'cats']);
  });
});