ts-prime/dist/commonjs/uniqBy.test.js

A utility library for JavaScript and Typescript.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
// import { uniq } from './uniq';
var pipe_1 = require("./pipe");
var _counter_1 = require("./_counter");
var take_1 = require("./take");
var uniqBy_1 = require("./uniqBy");
var identity_1 = require("./identity");
describe('uniqBy', function () {
    var people = [
        { name: 'John', age: 42 },
        { name: 'Jörn', age: 30 },
        { name: 'Sarah', age: 33 },
        { name: 'Kim', age: 22 },
        { name: 'Sarah', age: 38 },
        { name: 'John', age: 33 },
        { name: 'Emily', age: 42 },
    ];
    it('handles uniq by identity', function () {
        expect(uniqBy_1.uniqBy([1, 2, 2, 5, 1, 6, 7], identity_1.identity)).toEqual([1, 2, 5, 6, 7]);
    });
    it('returns people with uniq names', function () {
        expect(uniqBy_1.uniqBy(people, function (p) { return p.name; })).toEqual([
            { name: 'John', age: 42 },
            { name: 'Jörn', age: 30 },
            { name: 'Sarah', age: 33 },
            { name: 'Kim', age: 22 },
            { name: 'Emily', age: 42 },
        ]);
    });
    it('returns people with uniq ages', function () {
        expect(uniqBy_1.uniqBy(people, function (p) { return p.age; })).toEqual([
            { name: 'John', age: 42 },
            { name: 'Jörn', age: 30 },
            { name: 'Sarah', age: 33 },
            { name: 'Kim', age: 22 },
            { name: 'Sarah', age: 38 },
        ]);
    });
    it('returns people with uniq first letter of name', function () {
        expect(uniqBy_1.uniqBy(people, function (p) { return p.name.substring(0, 1); })).toEqual([
            { name: 'John', age: 42 },
            { name: 'Sarah', age: 33 },
            { name: 'Kim', age: 22 },
            { name: 'Emily', age: 42 },
        ]);
    });
    describe('pipe', function () {
        it('gets executed until target length is reached', function () {
            var counter = _counter_1.createCounter();
            var result = pipe_1.pipe([1, 2, 2, 5, 1, 6, 7], counter.fn(), uniqBy_1.uniqBy(identity_1.identity), take_1.take(3));
            expect(counter.count).toHaveBeenCalledTimes(4);
            expect(result).toEqual([1, 2, 5]);
        });
        it('get executed 3 times when take before uniqBy', function () {
            var counter = _counter_1.createCounter();
            var result = pipe_1.pipe([1, 2, 2, 5, 1, 6, 7], counter.fn(), take_1.take(3), uniqBy_1.uniqBy(identity_1.identity));
            expect(counter.count).toHaveBeenCalledTimes(3);
            expect(result).toEqual([1, 2]);
        });
    });
});