redioactive/dist/__tests__/find.spec.js

Reactive streams for chaining overlapping promises.

"use strict";
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var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
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Object.defineProperty(exports, "__esModule", { value: true });
const redio_1 = __importStar(require("../redio"));
describe('Finding a value in a stream', () => {
    test('Finds a value', async () => {
        await expect((0, redio_1.default)([1, 2, 3])
            .find((x) => x >= 2)
            .toArray()).resolves.toEqual([2]);
    });
    test('Works with an empty stream', async () => {
        await expect((0, redio_1.default)([])
            .find((x) => x >= 2)
            .toArray()).resolves.toEqual([]);
    });
    test('Documentation example', async () => {
        const docs = [
            { name: 'one', value: 1 },
            { name: 'two', value: 2 },
            { name: 'three', value: 3 }
        ];
        await expect((0, redio_1.default)(docs)
            .find((x) => x.value >= 2)
            .toArray()).resolves.toEqual([{ name: 'two', value: 2 }]);
    });
    test('No matches', async () => {
        await expect((0, redio_1.default)([1, 2, 3])
            .find(() => false)
            .toArray()).resolves.toEqual([]);
    });
    test('Matches the first', async () => {
        await expect((0, redio_1.default)([1, 2, 3])
            .find(() => true)
            .toArray()).resolves.toEqual([1]);
    });
    test('No matches - toPromise', async () => {
        await expect((0, redio_1.default)([1, 2, 3])
            .find(() => false)
            .each(() => {
            /* void */
        })
            .toPromise()).resolves.toEqual(redio_1.nil);
    });
    test('Matches the first - toPromise', async () => {
        await expect((0, redio_1.default)([1, 2, 3])
            .find(() => true)
            .each(() => {
            /* void */
        })
            .toPromise()).resolves.toEqual(1);
    });
    test('Finds a value with a promise', async () => {
        await expect((0, redio_1.default)([1, 2, 3])
            .find((x) => Promise.resolve(x >= 2))
            .toArray()).resolves.toEqual([2]);
    });
});