Deep equality of iterables with Chai

deep-iterable-equality-chai.js

import { expect as chaiExpect } from 'chai';

describe('deep iterable equality', () => {
  it('should deeply compare iterables based upon their type', () => {
    chaiExpect([1, 2, 3]).to.eql([1, 2, 3]);
    chaiExpect([1, [2, 3]]).to.eql([1, [2, 3]]);
    chaiExpect([1, 2, 3]).not.to.eql([3, 2, 1]);

    chaiExpect(new Set()).to.eql(new Set());
    chaiExpect(new Set([1, 2, 3])).to.eql(new Set([1, 2, 3]));
    chaiExpect(new Set([1, 2, 3])).to.eql(new Set([3, 2, 1]));
    chaiExpect(new Set([1, [2, 3]])).to.eql(new Set([[2, 3], 1]));
    chaiExpect(new Set([1, new Set([2, 3])])).to.eql(new Set([new Set([3, 2]), 1]));
    chaiExpect(new Set([1, 2, 3])).not.to.eql(new Set([3, 1, 1]));

    chaiExpect(new Map()).to.eql(new Map());
    chaiExpect(new Map([[1, 1], [2, 2], [3, 3]])).to.eql(new Map([[1, 1], [2, 2], [3, 3]]));
    chaiExpect(new Map([[1, 1], [2, 2], [3, 3]])).to.eql(new Map([[2, 2], [1, 1], [3, 3]]));
    chaiExpect(new Map([[{x: 1}, true]])).to.eql(new Map([[{x: 1}, true]]));
    chaiExpect(new Map([[{x: 1}, true]])).not.to.eql(new Map([[{x: 2}, true]]));
    chaiExpect(new Map([[1, 1], [2, 2], [3, 3]])).not.to.eql(new Map([[2, 2], [1, 1], [4, 4]]));

    chaiExpect(new Uint8Array([1, 2, 3])).to.eql(new Uint8Array([1, 2, 3]));
    chaiExpect(new Uint8Array([1, 2, 3])).not.to.eql(new Uint8Array([3, 2, 1]));
  });
});