Michael Telatynski
2f4e6a4ec4
* Use vitest for some EW unit tests * Ensure library builds are done before unit tests * Stabilise jest tests * Move more tests over * Make sonar happier * Update types/node for happy-dom compat again * Decrease max-workers to stabilise jest tests * Split jest over 3 runners to alleviate memory woes * Switch jest to runInBand * Attempt to deflake jest tests * tweak coverage * tweak coverage
59 lines
2.0 KiB
TypeScript
59 lines
2.0 KiB
TypeScript
/*
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* Copyright 2024 New Vector Ltd.
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*
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* SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only OR LicenseRef-Element-Commercial
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* Please see LICENSE files in the repository root for full details.
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*/
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import { vi, describe, it, expect, afterEach } from "vitest";
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import { batch } from "./promise.ts";
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describe("promise.ts", () => {
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describe("batch", () => {
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afterEach(() => vi.useRealTimers());
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it("should batch promises into groups of a given size", async () => {
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const promises = [() => Promise.resolve(1), () => Promise.resolve(2), () => Promise.resolve(3)];
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const batchSize = 2;
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const result = await batch(promises, batchSize);
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expect(result).toEqual([1, 2, 3]);
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});
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it("should wait for the current batch to finish to request the next one", async () => {
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vi.useFakeTimers();
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let promise1Called = false;
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const promise1 = () =>
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new Promise<number>((resolve) => {
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promise1Called = true;
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resolve(1);
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});
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let promise2Called = false;
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const promise2 = () =>
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new Promise<number>((resolve) => {
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promise2Called = true;
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setTimeout(() => {
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resolve(2);
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}, 10);
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});
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let promise3Called = false;
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const promise3 = () =>
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new Promise<number>((resolve) => {
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promise3Called = true;
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resolve(3);
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});
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const batchSize = 2;
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const batchPromise = batch([promise1, promise2, promise3], batchSize);
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expect(promise1Called).toBe(true);
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expect(promise2Called).toBe(true);
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expect(promise3Called).toBe(false);
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vi.advanceTimersByTime(11);
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expect(await batchPromise).toEqual([1, 2, 3]);
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});
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});
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});
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