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

A utility library for JavaScript and Typescript.

import { flatMap } from './flatMap';
import { pipe } from './pipe';
import { find } from './find';
import { createCounter } from './_counter';
describe('data_first', function () {
    it('flatMap', function () {
        var result = flatMap([1, 2], function (x) { return [x * 2, x * 3]; });
        expect(result).toEqual([2, 3, 4, 6]);
    });
});
describe('data_last', function () {
    it('flatMap', function () {
        var result = flatMap(function (x) { return [x * 2, x * 3]; })([1, 2]);
        expect(result).toEqual([2, 3, 4, 6]);
    });
    describe('pipe', function () {
        test('with find', function () {
            var counter1 = createCounter();
            var counter2 = createCounter();
            var result = pipe([10, 20, 30, 40], counter1.fn(), flatMap(function (x) { return [x, x + 1, x + 2, x + 3]; }), counter2.fn(), find(function (x) { return x === 22; }));
            expect(counter2.count).toHaveBeenCalledTimes(7);
            expect(result).toEqual(22);
        });
    });
});