unit-test.js

it('does not repeat meals within the same week if enough meals are available', () => {
  const mealIds = ['1', '2', '3', '4', '5', '6', '7'];
  const meals = immutable.fromJS({
    [mealIds[0]]: {name: 'Spaghetti'},
    [mealIds[1]]: {name: 'Fish and Chips'},
    [mealIds[2]]: {name: 'Meat and Potato Pie'},
    [mealIds[3]]: {name: 'Lasagne'},
    [mealIds[4]]: {name: 'Fish Stew'},
    [mealIds[5]]: {name: 'Toad in the Hole'},
    [mealIds[6]]: {name: 'Pork Cutlets'},
  });
  const defaultState = immutable.fromJS({
    visibleWeek: null,
    meals,
    plan: {},
  });
  const week = 19;
  const year = 2016;
  const date = immutable.fromJS({week, year});

  const state = reducer(defaultState, shuffleWeek(date)).getIn(['plan', '2016', '19']);

  expect(mealIds).toContain(state.getIn([0, 'id']));
  expect(mealIds).toContain(state.getIn([1, 'id']));
  expect(state.get(1)).not.toEqual(state.get(0));
  expect(mealIds).toContain(state.getIn([2, 'id']));
  expect(state.get(2)).not.toEqual(state.get(1));
  expect(mealIds).toContain(state.getIn([3, 'id']));
  expect(state.get(3)).not.toEqual(state.get(2));
  expect(mealIds).toContain(state.getIn([4, 'id']));
  expect(state.get(4)).not.toEqual(state.get(3));
  expect(mealIds).toContain(state.getIn([5, 'id']));
  expect(state.get(5)).not.toEqual(state.get(4));
  expect(mealIds).toContain(state.getIn([6, 'id']));
  expect(state.get(6)).not.toEqual(state.get(5));
});