Jannis Braun
00daa14dcd
vitest+jsdom puts test code in a different realm than Node's TextEncoder, so `toBeInstanceOf(Uint8Array)` rejects the encoder's return value even though it is structurally a Uint8Array. `Object.prototype.toString.call` checks the @@toStringTag tag, which is realm-safe.
38 lines
1.6 KiB
TypeScript
38 lines
1.6 KiB
TypeScript
import { describe, it, expect } from 'vitest';
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import {
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encodeStreamWatch,
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parseStreamWatch,
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isStreamWatchPayload,
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} from './streamWatchProtocol';
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describe('streamWatchProtocol', () => {
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it('round-trips an encoded payload', () => {
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const payload = { type: 'stream_watch' as const, target: 'user-1', watching: true };
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const encoded = encodeStreamWatch(payload);
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// Realm-safe Uint8Array check — TextEncoder returns a Uint8Array from Node's
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// realm, which `toBeInstanceOf(Uint8Array)` rejects under vitest+jsdom.
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expect(Object.prototype.toString.call(encoded)).toBe('[object Uint8Array]');
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const parsed = parseStreamWatch(encoded);
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expect(parsed).toEqual(payload);
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});
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it('parseStreamWatch returns null on invalid JSON', () => {
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const bad = new TextEncoder().encode('not json');
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expect(parseStreamWatch(bad)).toBeNull();
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});
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it('parseStreamWatch returns null on wrong message type', () => {
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const other = new TextEncoder().encode(JSON.stringify({ type: 'deafen', deafened: true }));
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expect(parseStreamWatch(other)).toBeNull();
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});
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it('isStreamWatchPayload validates shape', () => {
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expect(isStreamWatchPayload({ type: 'stream_watch', target: 'u', watching: true })).toBe(true);
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expect(isStreamWatchPayload({ type: 'stream_watch', target: 'u', watching: 'yes' })).toBe(false);
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expect(isStreamWatchPayload({ type: 'stream_watch', watching: true })).toBe(false);
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expect(isStreamWatchPayload({ type: 'other', target: 'u', watching: true })).toBe(false);
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expect(isStreamWatchPayload(null)).toBe(false);
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expect(isStreamWatchPayload('string')).toBe(false);
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});
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});
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