tsoid/dist/src/promises/__tests__/liftp.test.js

Typed functional library to deal with async operations.

"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
Object.defineProperty(exports, "__esModule", { value: true });
const lift_1 = require("../lift");
const utils_1 = require("../../../tests/utils");
const index_1 = require("../../index");
describe('liftP', () => {
    const addOne = (x) => x + 1;
    const getUserID = (user) => user.uid;
    const filterEvens = (users) => users.filter((_, index) => index % 2 === 0);
    const mapID = (users) => users.map((user) => user.uid);
    const joinIds = (ids) => ids.join(' -> ');
    it('Should lift a function into a promise', () => {
        const px = () => Promise.resolve(1);
        const result = lift_1.default(addOne, px);
        result.then((value) => expect(value).toBe(2));
    });
    it('Lift a function that get the user id from Promise<User>', () => __awaiter(void 0, void 0, void 0, function* () {
        const uid = yield lift_1.default(getUserID, () => utils_1.getUser('123'));
        expect(uid).toBe('123');
    }));
    it('Should handle promise failure', () => __awaiter(void 0, void 0, void 0, function* () {
        const uid = yield lift_1.default(getUserID, () => utils_1.getUserWithError('123'));
        expect(uid).toBeInstanceOf(Error);
        expect(uid.message).toBe('Error getting 123');
    }));
    it('Should return a promise of an error if any error occur when lifting', () => {
        const maybeGetTen = () => Promise.reject(new Error('reason test'));
        const result = lift_1.default(addOne, maybeGetTen);
        result.catch((err) => {
            expect(err).toBeInstanceOf(Error);
        });
    });
    it('Should lift a composed function', () => __awaiter(void 0, void 0, void 0, function* () {
        const composedFn = index_1.compose(joinIds, mapID, filterEvens);
        const result = yield lift_1.default(composedFn, utils_1.getUsers);
        expect(result).toBe('01 -> 03');
    }));
    it('Should lift a piped function', () => __awaiter(void 0, void 0, void 0, function* () {
        const pipedFn = index_1.pipe(filterEvens, mapID, joinIds);
        const result = yield lift_1.default(pipedFn, utils_1.getUsers);
        expect(result).toBe('01 -> 03');
    }));
});