More protobufjs use

ts/test-both/util/normalizeNumber_test.ts

@@ -0,0 +1,21 @@
+// Copyright 2021 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import { assert } from 'chai';
+import Long from 'long';
+
+import { normalizeNumber } from '../../util/normalizeNumber';
+
+describe('normalizeNumber', () => {
+  it('returns undefined when input is undefined', () => {
+    assert.isUndefined(normalizeNumber(undefined));
+  });
+
+  it('returns number when input is number', () => {
+    assert.strictEqual(normalizeNumber(123), 123);
+  });
+
+  it('returns number when input is Long', () => {
+    assert.strictEqual(normalizeNumber(new Long(123)), 123);
+  });
+});