ts-prime/dist/es/difference.test.js

A utility library for JavaScript and Typescript.

import { difference } from './difference';
import { pipe } from './pipe';
import { take } from './take';
import { map } from './map';
var source = [1, 2, 3, 4];
var other = [2, 5, 3];
var expected = [1, 4];
describe('data_first', function () {
    test('should return difference', function () {
        expect(difference(source, other)).toEqual(expected);
    });
});
describe('data_last', function () {
    test('should return difference', function () {
        expect(difference(other)(source)).toEqual(expected);
    });
    test('lazy', function () {
        var count = jest.fn();
        var result = pipe([1, 2, 3, 4, 5, 6], map(function (x) {
            count();
            return x;
        }), difference([2, 3]), take(2));
        expect(count).toHaveBeenCalledTimes(4);
        expect(result).toEqual([1, 4]);
    });
});