64 lines
1.7 KiB
TypeScript
64 lines
1.7 KiB
TypeScript
 
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import { test, afterEach } from 'node:test';
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import assert from 'node:assert/strict';
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import { checkIndexedDBSupport } from './featureCheck';
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// `checkIndexedDBSupport` resolves by talking to the global `indexedDB`. There
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// is no real IndexedDB in this Node test environment, so each case installs a
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// minimal stub on `globalThis.indexedDB` and restores it afterwards.
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type OpenRequest = {
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onsuccess?: () => void;
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onerror?: () => void;
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};
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const originalIndexedDB = (globalThis as { indexedDB?: unknown }).indexedDB;
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afterEach(() => {
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(globalThis as { indexedDB?: unknown }).indexedDB = originalIndexedDB;
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});
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const installIndexedDB = (impl: unknown) => {
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(globalThis as { indexedDB?: unknown }).indexedDB = impl;
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};
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test('resolves true when the open request fires onsuccess', async () => {
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let deleted = false;
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installIndexedDB({
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open: (): OpenRequest => {
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const req: OpenRequest = {};
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// fire async, mimicking the real event loop
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queueMicrotask(() => req.onsuccess?.());
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return req;
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},
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deleteDatabase: () => {
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deleted = true;
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},
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});
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assert.equal(await checkIndexedDBSupport(), true);
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assert.equal(deleted, true);
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});
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test('resolves false when the open request fires onerror', async () => {
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installIndexedDB({
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open: (): OpenRequest => {
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const req: OpenRequest = {};
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queueMicrotask(() => req.onerror?.());
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return req;
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},
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deleteDatabase: () => {},
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});
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assert.equal(await checkIndexedDBSupport(), false);
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});
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test('resolves false when indexedDB.open throws synchronously', async () => {
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installIndexedDB({
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open: () => {
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throw new Error('blocked');
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},
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deleteDatabase: () => {},
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});
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assert.equal(await checkIndexedDBSupport(), false);
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});
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