rx-queue/dist/esm/src/throttle-queue/throttle-queue.spec.js

Easy to Use ReactiveX Queue that Supports Delay/DelayExecutor/Throttle/Debounce/Concurrency Features Powered by RxJS/IxJS

#!/usr/bin/env -S node --no-warnings --loader ts-node/esm
import { test, sinon, } from 'tstest';
import ThrottleQueue from './throttle-queue.js';
const EXPECTED_ITEM1 = { test: 'testing123' };
const EXPECTED_ITEM2 = { mol: 42 };
const EXPECTED_ITEM3 = 42;
const THROTTLE_PERIOD_TIME = 10; // milliseconds
test('ThrottleQueue 1 item', async (t) => {
    const q = new ThrottleQueue(THROTTLE_PERIOD_TIME);
    const spy = sinon.spy();
    q.subscribe(spy);
    q.next(EXPECTED_ITEM1);
    t.ok(spy.calledOnce, 'should called right after first item');
    t.deepEqual(spy.firstCall.args[0], EXPECTED_ITEM1, 'should get the first item immediately');
});
test('ThrottleQueue 2 item', async (t) => {
    const q = new ThrottleQueue(THROTTLE_PERIOD_TIME);
    const spy = sinon.spy();
    q.subscribe(spy);
    q.next(EXPECTED_ITEM1);
    q.next(EXPECTED_ITEM2);
    t.ok(spy.calledOnce, 'should only be called once right after next two items');
    t.deepEqual(spy.firstCall.args[0], EXPECTED_ITEM1, 'should get the first item');
    await new Promise(resolve => setTimeout(resolve, THROTTLE_PERIOD_TIME + 3));
    t.ok(spy.calledOnce, 'should drop the second call after period because of throttle');
});
test('ThrottleQueue 3 items', async (t) => {
    const q = new ThrottleQueue(THROTTLE_PERIOD_TIME);
    const spy = sinon.spy();
    q.subscribe(spy);
    q.next(EXPECTED_ITEM1);
    q.next(EXPECTED_ITEM2);
    await new Promise(resolve => setTimeout(resolve, THROTTLE_PERIOD_TIME + 3));
    q.next(EXPECTED_ITEM3);
    t.ok(spy.calledTwice, 'should received the third item after THROTTLE_TIME');
    t.deepEqual(spy.secondCall.args[0], EXPECTED_ITEM3, 'should received EXPECTED_ITEM3 (not the ITEM2!)');
});
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