| import { PromiseQueue } from './promise-queue' |
|
|
| describe('PromiseQueue', () => { |
| it('should limit the number of concurrent promises', async () => { |
| const queue = new PromiseQueue(2) |
| const results: number[] = [] |
|
|
| const promises = Array.from({ length: 5 }, (_, i) => |
| queue.enqueue(async () => { |
| results.push(i) |
| await new Promise((resolve) => setTimeout(resolve, 100)) |
| return i |
| }) |
| ) |
|
|
| const resolved = await Promise.all(promises) |
|
|
| expect(resolved).toEqual([0, 1, 2, 3, 4]) |
| expect(results).toEqual([0, 1, 2, 3, 4]) |
| }) |
| it('should allow bumping a promise to be next in the queue', async () => { |
| const queue = new PromiseQueue(2) |
| const results: number[] = [] |
|
|
| const promises = Array.from({ length: 5 }, (_, i) => |
| queue.enqueue(async () => { |
| results.push(i) |
| await new Promise((resolve) => setTimeout(resolve, 100)) |
| return i |
| }) |
| ) |
|
|
| queue.bump(promises[3]) |
|
|
| const resolved = await Promise.all(promises) |
|
|
| |
| expect(results).toEqual([0, 1, 3, 2, 4]) |
| expect(resolved).toEqual([0, 1, 2, 3, 4]) |
| }) |
| }) |
|
|
