New Group administration: update title and avatar

ts/test-both/util/characters_test.ts

@@ -0,0 +1,19 @@
+// Copyright 2021 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import { assert } from 'chai';
+
+import { count } from '../../util/characters';
+
+describe('character utilities', () => {
+  describe('count', () => {
+    it('returns the number of characters in a string (not necessarily the length)', () => {
+      assert.strictEqual(count(''), 0);
+      assert.strictEqual(count('hello'), 5);
+      assert.strictEqual(count('Bokmål'), 6);
+      assert.strictEqual(count('💩💩💩'), 3);
+      assert.strictEqual(count('👩‍❤️‍👩'), 6);
+      assert.strictEqual(count('Z͑ͫ̓ͪ̂ͫ̽͏̴̙̤̞͉͚̯̞̠͍A̴̵̜̰͔ͫ͗͢L̠ͨͧͩ͘G̴̻͈͍͔̹̑͗̎̅͛́Ǫ̵̹̻̝̳͂̌̌͘'), 58);
+    });
+  });
+});