test(voice): fix tests

packages/voice/__tests__/entersState.test.ts

@@ -0,0 +1,56 @@
+/* eslint-disable @typescript-eslint/no-unsafe-member-access */
+/* eslint-disable @typescript-eslint/no-unsafe-assignment */
+import EventEmitter from 'node:events';
+import { VoiceConnection, VoiceConnectionStatus } from '../src/VoiceConnection';
+import { entersState } from '../src/util/entersState';
+
+function createFakeVoiceConnection(status = VoiceConnectionStatus.Signalling) {
+	const vc = new EventEmitter() as any;
+	vc.state = { status };
+	return vc as VoiceConnection;
+}
+
+beforeEach(() => {
+	jest.useFakeTimers();
+});
+
+describe('entersState', () => {
+	test('Returns the target once the state has been entered before timeout', async () => {
+		jest.useRealTimers();
+		const vc = createFakeVoiceConnection();
+		// eslint-disable-next-line @typescript-eslint/no-unsafe-argument
+		process.nextTick(() => vc.emit(VoiceConnectionStatus.Ready, null as any, null as any));
+		const result = await entersState(vc, VoiceConnectionStatus.Ready, 1000);
+		expect(result).toBe(vc);
+	});
+
+	test('Rejects once the timeout is exceeded', async () => {
+		const vc = createFakeVoiceConnection();
+		const promise = entersState(vc, VoiceConnectionStatus.Ready, 1000);
+		jest.runAllTimers();
+		await expect(promise).rejects.toThrowError();
+	});
+
+	test('Returns the target once the state has been entered before signal is aborted', async () => {
+		jest.useRealTimers();
+		const vc = createFakeVoiceConnection();
+		const ac = new AbortController();
+		// eslint-disable-next-line @typescript-eslint/no-unsafe-argument
+		process.nextTick(() => vc.emit(VoiceConnectionStatus.Ready, null as any, null as any));
+		const result = await entersState(vc, VoiceConnectionStatus.Ready, ac.signal);
+		expect(result).toBe(vc);
+	});
+
+	test('Rejects once the signal is aborted', async () => {
+		const vc = createFakeVoiceConnection();
+		const ac = new AbortController();
+		const promise = entersState(vc, VoiceConnectionStatus.Ready, ac.signal);
+		ac.abort();
+		await expect(promise).rejects.toThrowError();
+	});
+
+	test('Resolves immediately when target already in desired state', async () => {
+		const vc = createFakeVoiceConnection();
+		await expect(entersState(vc, VoiceConnectionStatus.Signalling, 1000)).resolves.toBe(vc);
+	});
+});