ds-algo-study/DS-n-Algos/_Extra-Practice/weave/test.js

Just experimenting with publishing a package

const weave = require('./index');
const Queue = require('./queue');

test('queues have a peek function', () => {
  const q = new Queue();
  expect(typeof q.peek).toEqual('function');
});

test('peek returns, but does not remove, the first value', () => {
  const q = new Queue();
  q.add(1);
  q.add(2);
  expect(q.peek()).toEqual(1);
  expect(q.peek()).toEqual(1);
  expect(q.remove()).toEqual(1);
  expect(q.remove()).toEqual(2);
});

test('weave is a function', () => {
  expect(typeof weave).toEqual('function');
});

test('weave can combine two queues', () => {
  const one = new Queue();
  one.add(1);
  one.add(2);
  one.add(3);
  one.add(4);
  const two = new Queue();
  two.add('one');
  two.add('two');
  two.add('three');
  two.add('four');

  const result = weave(one, two);
  expect(result.remove()).toEqual(1);
  expect(result.remove()).toEqual('one');
  expect(result.remove()).toEqual(2);
  expect(result.remove()).toEqual('two');
  expect(result.remove()).toEqual(3);
  expect(result.remove()).toEqual('three');
  expect(result.remove()).toEqual(4);
  expect(result.remove()).toEqual('four');
  expect(result.remove()).toBeUndefined();
});