Add Storybook stories for the new brewery detail page components

web/frontend/stories/CommentsCard.stories.tsx

@@ -0,0 +1,59 @@
+import type { Meta, StoryObj } from '@storybook/react-vite';
+import { expect, fn, userEvent, within } from 'storybook/test';
+import CommentsCard from '../app/features/breweries/components/CommentsCard';
+import { FILLER_COMMENTS } from '../app/features/breweries/utils/filler-brewery-detail';
+
+const commentsCardDescription = `Comments section on the brewery detail page: a post form (logged in) or a sign-in alert (logged out), followed by the comment list. Posting is disabled until the textarea has non-whitespace content.`;
+
+const meta = {
+    title: 'Breweries/CommentsCard',
+    component: CommentsCard,
+    tags: ['autodocs'],
+    args: {
+        comments: FILLER_COMMENTS,
+        currentUserInitials: 'JD',
+        onAddComment: fn(),
+        onToggleCommentLike: fn(),
+    },
+    parameters: {
+        layout: 'padded',
+        docs: {
+            description: {
+                component: commentsCardDescription,
+            },
+        },
+    },
+} satisfies Meta<typeof CommentsCard>;
+
+export default meta;
+type Story = StoryObj<typeof meta>;
+
+export const LoggedIn: Story = {
+    args: { loggedIn: true },
+    play: async ({ args, canvasElement }) => {
+        const canvas = within(canvasElement);
+        const postButton = canvas.getByRole('button', { name: /post comment/i });
+        await expect(postButton).toBeDisabled();
+
+        await userEvent.type(
+            canvas.getByPlaceholderText('Share your thoughts on this brewery'),
+            'Great taproom!',
+        );
+        await expect(postButton).toBeEnabled();
+        await userEvent.click(postButton);
+        await expect(args.onAddComment).toHaveBeenCalledWith('Great taproom!');
+    },
+};
+
+export const LoggedOut: Story = {
+    args: { loggedIn: false },
+    play: async ({ canvasElement }) => {
+        const canvas = within(canvasElement);
+        await expect(
+            canvas.getByText('Sign in to like, rate, and comment on breweries.'),
+        ).toBeInTheDocument();
+        await expect(
+            canvas.queryByPlaceholderText('Share your thoughts on this brewery'),
+        ).not.toBeInTheDocument();
+    },
+};