yadda/test/ArrayTests.js

A true BDD framework for JavaScript

'use strict';

var assert = require('assert');
var $ = require('../lib/Array');

describe('Array', function () {
  it('should flatten a nested array', function () {
    assert.deepEqual($([1, 2, 3]).flatten().naked(), [1, 2, 3]);
    assert.deepEqual(
      $([1, [2], 3])
        .flatten()
        .naked(),
      [1, 2, 3]
    );
    assert.deepEqual(
      $([1, [[2], 3]])
        .flatten()
        .naked(),
      [1, 2, 3]
    );
    assert.deepEqual(
      $([1, [[2], 3]], [])
        .flatten()
        .naked(),
      [1, 2, 3]
    );
  });

  it('should flatten an empty array', function () {
    assert.deepEqual($([]).flatten().naked(), []);
  });

  it('should iterate asynchronously', function () {
    var items = [1, 2, 3];
    var iterations = 0;
    $(items).each_async(
      function (item, index, callback) {
        assert.equal(item, items[iterations]);
        assert.equal(index, iterations);
        iterations++;
        callback(null, item);
      },
      function (err, result) {
        assert.ifError(err);
        assert.equal(result, 3);
      }
    );
  });

  it('should return the last item', function () {
    assert.equal($([1, 2, 3]).last(), 3);
  });

  it('should fill an array with n items', function () {
    assert.deepEqual($([]).fill('A', 3).naked(), ['A', 'A', 'A']);
  });
});