Convert i18n tests to TypeScript

ts/test-both/types/setupI18n_test.ts

@@ -0,0 +1,45 @@
+// Copyright 2017-2022 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import { assert } from 'chai';
+import type { LocalizerType } from '../../types/Util';
+import { setupI18n } from '../../util/setupI18n';
+import * as enMessages from '../../../_locales/en/messages.json';
+
+describe('setupI18n', () => {
+  let i18n: LocalizerType;
+
+  beforeEach(() => {
+    i18n = setupI18n('en', enMessages);
+  });
+
+  describe('i18n', () => {
+    it('returns empty string for unknown string', () => {
+      assert.strictEqual(i18n('random'), '');
+    });
+    it('returns message for given string', () => {
+      assert.strictEqual(i18n('reportIssue'), 'Contact Support');
+    });
+    it('returns message with single substitution', () => {
+      const actual = i18n('migratingToSQLCipher', ['45/200']);
+      assert.equal(actual, 'Optimizing messages... 45/200 complete.');
+    });
+    it('returns message with multiple substitutions', () => {
+      const actual = i18n('theyChangedTheTimer', {
+        name: 'Someone',
+        time: '5 minutes',
+      });
+      assert.equal(
+        actual,
+        'Someone set the disappearing message time to 5 minutes.'
+      );
+    });
+  });
+
+  describe('getLocale', () => {
+    it('returns a string with length two or greater', () => {
+      const locale = i18n.getLocale();
+      assert.isAtLeast(locale.trim().length, 2);
+    });
+  });
+});