94 lines
3.9 KiB
TypeScript
94 lines
3.9 KiB
TypeScript
import assert from 'node:assert/strict';
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import { test } from 'node:test';
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import { fetchOverpass, OVERPASS_ENDPOINTS, type BBox } from '../src/osm/overpass';
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const bbox: BBox = [35.3, -112.9, 35.31, -112.89];
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const elements = [{ type: 'node', id: 1 }];
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const ok = () => Response.json({ elements });
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const pending = (signal: AbortSignal) => new Promise<Response>((_, reject) => {
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signal.addEventListener('abort', () => reject(new DOMException('Aborted', 'AbortError')), { once: true });
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});
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test('starts with Mail.ru and falls back after an HTTP error', async (t) => {
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const urls: string[] = [];
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t.mock.method(globalThis, 'fetch', async (url: string) => {
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urls.push(url);
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return urls.length === 1 ? new Response('', { status: 406 }) : ok();
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});
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assert.deepEqual(await fetchOverpass(bbox), elements);
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assert.match(urls[0], /maps\.mail\.ru/);
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assert.deepEqual(urls, OVERPASS_ENDPOINTS.slice(0, 2));
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});
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test('times out a hanging request and tries the next server', async (t) => {
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t.mock.timers.enable({ apis: ['setTimeout'] });
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let calls = 0;
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t.mock.method(globalThis, 'fetch', (_url: string, init: RequestInit) => {
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return ++calls === 1 ? pending(init.signal!) : Promise.resolve(ok());
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});
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const result = fetchOverpass(bbox);
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t.mock.timers.tick(90_000);
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assert.deepEqual(await result, elements);
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assert.equal(calls, 2);
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});
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test('timeout also covers downloading the response body', async (t) => {
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t.mock.timers.enable({ apis: ['setTimeout'] });
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let calls = 0;
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t.mock.method(globalThis, 'fetch', async (_url: string, init: RequestInit) => {
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if (++calls > 1) return ok();
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return { ok: true, status: 200, json: () => pending(init.signal!) };
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});
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const result = fetchOverpass(bbox);
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await Promise.resolve();
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t.mock.timers.tick(90_000);
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assert.deepEqual(await result, elements);
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assert.equal(calls, 2);
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});
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test('user cancellation stops the active request without fallback', async (t) => {
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const controller = new AbortController();
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const fetch = t.mock.method(globalThis, 'fetch', (_url: string, init: RequestInit) => pending(init.signal!));
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const result = fetchOverpass(bbox, undefined, controller.signal);
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controller.abort();
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await assert.rejects(result, { name: 'AbortError' });
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assert.equal(fetch.mock.callCount(), 1);
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});
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test('user cancellation interrupts the retry delay', async (t) => {
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t.mock.timers.enable({ apis: ['setTimeout'] });
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const controller = new AbortController();
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const fetch = t.mock.method(globalThis, 'fetch', async () => new Response('', { status: 429 }));
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const result = fetchOverpass(bbox, undefined, controller.signal);
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await Promise.resolve();
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controller.abort();
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await assert.rejects(result, { name: 'AbortError' });
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assert.equal(fetch.mock.callCount(), 1);
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});
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test('an already cancelled operation makes no requests', async (t) => {
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const fetch = t.mock.method(globalThis, 'fetch', async () => ok());
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await assert.rejects(fetchOverpass(bbox, undefined, AbortSignal.abort()), { name: 'AbortError' });
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assert.equal(fetch.mock.callCount(), 0);
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});
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test('reports failure when every server times out', async (t) => {
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t.mock.timers.enable({ apis: ['setTimeout'] });
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const fetch = t.mock.method(globalThis, 'fetch', (_url: string, init: RequestInit) => pending(init.signal!));
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const result = fetchOverpass(bbox);
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const check = assert.rejects(result, /Таймаут.*90 секунд/);
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for (let i = 0; i < OVERPASS_ENDPOINTS.length; i++) {
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t.mock.timers.tick(90_000);
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await Promise.resolve();
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}
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await check;
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assert.equal(fetch.mock.callCount(), OVERPASS_ENDPOINTS.length);
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});
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test('server identifies itself to Overpass rather than using the generic Node user agent', async (t) => {
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t.mock.method(globalThis, 'fetch', async (_url: string, init: RequestInit) => {
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assert.match(new Headers(init.headers).get('User-Agent')!, /citygen/);
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return ok();
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});
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assert.deepEqual(await fetchOverpass(bbox), elements);
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});
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