aws-cdk/test/util/parallel.test.js

CDK Toolkit, the command line tool for CDK apps

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const parallel_1 = require("../../lib/util/parallel");
const util_1 = require("../util");
test('parallelPromises', async () => {
    const N = 4;
    const J = 100;
    let jobsDone = 0;
    let concurrent = 0;
    let maxConcurrent = 0;
    const jobs = range(J).map(() => async () => {
        concurrent += 1;
        maxConcurrent = Math.max(concurrent, maxConcurrent);
        await (0, util_1.sleep)(Math.round(Math.random() * 100));
        concurrent -= 1;
        jobsDone += 1;
    });
    await (0, parallel_1.parallelPromises)(N, jobs);
    expect(maxConcurrent).toBeLessThanOrEqual(N);
    expect(maxConcurrent).toBeGreaterThan(1);
    expect(jobsDone).toEqual(J);
});
function range(n) {
    const ret = new Array();
    for (let i = 0; i < n; i++) {
        ret.push(i);
    }
    return ret;
}
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