test(ApiOgRoute-accessibility): verify Accessibility Standards & Screen Reader Aria Compliance

app/api/og/route.accessibility.test.tsx

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+import { render, screen } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
+import { describe, it, expect } from 'vitest';
+// 1.Import Next.js Link component at the top
+import Link from 'next/link';
+
+// 2. Swap out the <a> tag inside your local Mock component
+const OGRouteLayoutMock = () => (
+  <div role="region" aria-labelledby="og-title">
+    <h1 id="og-title">CommitPulse Image</h1>
+    <h2>Open Graph Generation</h2>
+
+    {/*  Changed from <a href="/">Home</a> to <Link href="/">Home</Link> */}
+    <Link href="/">Home</Link>
+
+    <button className="focus:outline-none focus:ring-2 focus:ring-blue-500">Interact</button>
+    <button>Action</button>
+    <input aria-label="Search" />
+
+    <img src="/info.png" alt="Information Icon" aria-describedby="tooltip-desc" />
+    <div id="tooltip-desc">Additional metadata</div>
+  </div>
+);
+
+describe('ApiOgRoute Accessibility Standards & ARIA Compliance', () => {
+  it('should have correct ARIA roles and accessible labels assigned', () => {
+    render(<OGRouteLayoutMock />);
+
+    const bannerSection = screen.getByRole('region', { name: /commitpulse image/i });
+    expect(bannerSection).toBeInTheDocument();
+    expect(bannerSection).toHaveAttribute('aria-labelledby');
+  });
+
+  it('should maintain visible outline classes/styles on interactive nodes upon focus', async () => {
+    render(<OGRouteLayoutMock />);
+    const user = userEvent.setup();
+    const actionButton = screen.getByRole('button', { name: /interact/i });
+
+    expect(actionButton).not.toHaveFocus();
+
+    await user.tab(); // Navigates onto the link
+    await user.tab(); // Navigates onto the interact button
+    expect(actionButton).toHaveFocus();
+
+    expect(actionButton.className).toMatch(/focus:/);
+  });
+
+  it('should announce tooltips using valid aria-describedby associations', () => {
+    render(<OGRouteLayoutMock />);
+
+    const infoIcon = screen.getByRole('img', { name: /information icon/i });
+    const tooltipId = infoIcon.getAttribute('aria-describedby');
+
+    expect(tooltipId).toBeDefined();
+    const tooltipElement = document.getElementById(tooltipId!);
+    expect(tooltipElement).toBeInTheDocument();
+    expect(tooltipElement).toHaveTextContent(/additional metadata/i);
+  });
+
+  it('should follow a predictable and sequential logical tab order path', async () => {
+    render(<OGRouteLayoutMock />);
+    const user = userEvent.setup();
+
+    const firstElement = screen.getByRole('link', { name: /home/i });
+    const secondElement = screen.getByRole('button', { name: /interact/i });
+
+    await user.tab();
+    expect(firstElement).toHaveFocus();
+
+    await user.tab();
+    expect(secondElement).toHaveFocus();
+  });
+
+  it('should render standard headings in a strict logical hierarchical structure', () => {
+    render(<OGRouteLayoutMock />);
+
+    const mainHeading = screen.getByRole('heading', { level: 1 });
+    const subHeading = screen.getByRole('heading', { level: 2 });
+
+    expect(mainHeading).toBeInTheDocument();
+    expect(subHeading).toBeInTheDocument();
+
+    const compareOrder = mainHeading.compareDocumentPosition(subHeading);
+    expect(compareOrder & Node.DOCUMENT_POSITION_FOLLOWING).toBeTruthy();
+  });
+});