Handle message render errors in timeline

ts/components/conversation/ErrorBoundary.stories.tsx

@@ -0,0 +1,26 @@
+// Copyright 2021 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import * as React from 'react';
+import { storiesOf } from '@storybook/react';
+import { action } from '@storybook/addon-actions';
+
+import { setup as setupI18n } from '../../../js/modules/i18n';
+import enMessages from '../../../_locales/en/messages.json';
+import { ErrorBoundary } from './ErrorBoundary';
+
+const i18n = setupI18n('en', enMessages);
+
+const story = storiesOf('Components/Conversation/ErrorBoundary', module);
+
+const Fail: React.FC<Record<string, never>> = () => {
+  throw new Error('Failed');
+};
+
+story.add('Error state', () => {
+  return (
+    <ErrorBoundary i18n={i18n} showDebugLog={action('showDebugLog')}>
+      <Fail />
+    </ErrorBoundary>
+  );
+});