redioactive
Version:
Reactive streams for chaining overlapping promises.
112 lines (111 loc) • 4.69 kB
JavaScript
;
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
const redio_1 = __importStar(require("../redio"));
const toArrayWait = (src, delay, options) => {
const wait = (t) => new Promise((r) => setTimeout(() => r(t), t));
const result = [];
const promisedArray = new Promise((resolve, reject) => {
const sp = src.spout(async (tt) => {
if ((0, redio_1.isEnd)(tt)) {
resolve(result);
}
else if ((0, redio_1.isValue)(tt)) {
if (delay > 0)
await wait(delay);
result.push(tt);
}
}, options);
sp.catch(reject);
return sp;
});
return promisedArray;
};
describe('Forking values in a stream', () => {
test('Simple single fork', async () => {
const src = (0, redio_1.default)([1, 2, 3, 4, 5, 6], { bufferSizeMax: 2 });
const result = await src.fork().toArray();
expect(result).toEqual([1, 2, 3, 4, 5, 6]);
});
test('Fork to two streams', async () => {
const src = (0, redio_1.default)([1, 2, 3, 4, 5, 6], { bufferSizeMax: 2 });
const result = await Promise.all([src.fork().toArray(), src.fork().toArray()]);
expect(result).toEqual([
[1, 2, 3, 4, 5, 6],
[1, 2, 3, 4, 5, 6]
]);
});
test('Fork to three streams', async () => {
const src = (0, redio_1.default)([1, 2, 3, 4, 5, 6], { bufferSizeMax: 2 });
const result = await Promise.all([
src.fork().toArray(),
src.fork().toArray(),
src.fork().toArray()
]);
expect(result).toEqual([
[1, 2, 3, 4, 5, 6],
[1, 2, 3, 4, 5, 6],
[1, 2, 3, 4, 5, 6]
]);
});
test('Fork to two streams with different delays', async () => {
const src = (0, redio_1.default)([1, 2, 3, 4, 5, 6], { bufferSizeMax: 2 });
const f1 = toArrayWait(src.fork({ bufferSizeMax: 1 }), 10, { bufferSizeMax: 1 });
const f2 = toArrayWait(src.fork({ bufferSizeMax: 1 }), 50, { bufferSizeMax: 1 });
const result = await Promise.all([f1, f2]);
expect(result).toEqual([
[1, 2, 3, 4, 5, 6],
[1, 2, 3, 4, 5, 6]
]);
}, 1000);
test('Fork to three streams with different delays', async () => {
const src = (0, redio_1.default)([1, 2, 3, 4, 5, 6], { bufferSizeMax: 2 });
const f1 = toArrayWait(src.fork({ bufferSizeMax: 1 }), 10, { bufferSizeMax: 1 });
const f2 = toArrayWait(src.fork({ bufferSizeMax: 1 }), 30, { bufferSizeMax: 1 });
const f3 = toArrayWait(src.fork({ bufferSizeMax: 1 }), 50, { bufferSizeMax: 1 });
const result = await Promise.all([f1, f2, f3]);
expect(result).toEqual([
[1, 2, 3, 4, 5, 6],
[1, 2, 3, 4, 5, 6],
[1, 2, 3, 4, 5, 6]
]);
}, 1000);
test('Async single fork & unfork', async () => {
const src = (0, redio_1.default)([1, 2, 3, 4, 5, 6]);
const f1 = src.fork({ bufferSizeMax: 1 });
const f1Result = toArrayWait(f1, 10);
const result = await new Promise((resolve) => {
setTimeout(() => {
const f2 = src.fork({ bufferSizeMax: 1 });
setTimeout(() => src.unfork(f2), 10);
resolve(Promise.all([f1Result, toArrayWait(f2, 4)]));
}, 10);
});
expect(result).toEqual([
[1, 2, 3, 4, 5, 6],
[3, 4]
]);
});
});