Optimize number of range requests in updater

ts/test-node/util/wrapEventEmitterOnce_test.ts

@@ -0,0 +1,40 @@
+// Copyright 2022 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import { assert } from 'chai';
+import { EventEmitter } from 'events';
+
+import { wrapEventEmitterOnce as once } from '../../util/wrapEventEmitterOnce';
+
+describe('wrapEventEmitterOnce', () => {
+  let ee: EventEmitter;
+
+  beforeEach(() => {
+    ee = new EventEmitter();
+  });
+
+  it('should get the event arguments', async () => {
+    const result = once(ee, 'result');
+
+    ee.emit('result', 1, 2, 3);
+
+    assert.deepStrictEqual(await result, [1, 2, 3]);
+  });
+
+  it('should handle error event', async () => {
+    const result = once(ee, 'result');
+
+    ee.emit('error', new Error('aha!'));
+
+    await assert.isRejected(result, 'aha!');
+  });
+
+  it('should stop handling error event after result', async () => {
+    const result = once(ee, 'result');
+
+    ee.emit('result', 'okay');
+
+    assert.deepStrictEqual(await result, ['okay']);
+    assert.strictEqual(ee.listeners('error').length, 0);
+  });
+});