M-029 Pass 3 batch A: T-1 page tests for 5 simpler pages — XSS hardening

Pass 3 of M-029 ships per-page render + XSS-hardening test suites for the

14 T-1-deferred pages. Each test:

  - Renders the page with mock data containing <script> payloads in every

    text-rendering field.

  - Asserts no live <script data-xss='...'> element attached to the DOM.

  - Asserts no global side-effect from the script body executed (window

    __xss_pwned__ stays undefined).

  - Asserts the literal payload text appears as escaped content (proving

    the page surfaces the data without rendering it as HTML).

Batch A: 5 simpler pages (display-only / single-mutation / login).

Test files added:

  - DigestPage.test.tsx           preview HTML payload + render coverage

  - LoginPage.test.tsx            useAuth.error payload + form invariants

                                   (mocked AuthProvider via Layout.test pattern)

  - ShortLivedPage.test.tsx       cert subject DN / SAN / id / environment

                                   payloads through the DataTable rendering

  - AuditPage.test.tsx            audit-event action / actor / resource_*

                                   payloads through the DataTable rendering

  - ObservabilityPage.test.tsx    health.status + Prometheus text payloads

                                   through the <pre> rendering surface

Closes 5 of 14 T-1-deferred pages toward M-029 Pass 3 completion.

web/src/pages/AuditPage.test.tsx

@@ -0,0 +1,104 @@
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+import { render, screen, waitFor, cleanup } from '@testing-library/react';
+import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
+import { MemoryRouter } from 'react-router-dom';
+import type { ReactNode } from 'react';
+
+// -----------------------------------------------------------------------------
+// M-029 Pass 3 (Audit M-026): AuditPage XSS-hardening + render coverage.
+//
+// AuditPage renders audit-event rows with action / actor / actor_type /
+// resource_type / resource_id / details fields. Audit events are written by
+// the server but their detail fields can contain operator-supplied content
+// (e.g., reason strings on certificate_revoked events). H-008 / M-022 already
+// ship the redactor that scrubs PII + credentials from audit details, but the
+// rendering path also has to be XSS-safe in case a non-PII free-text field
+// (action, resource_type, etc.) reflects attacker-controllable bytes.
+//
+// Pins:
+//   1. Page renders.
+//   2. Audit events containing literal <script> payloads do NOT execute.
+//   3. The literal payload text appears as escaped content.
+// -----------------------------------------------------------------------------
+
+vi.mock('../api/client', () => ({
+  getAuditEvents: vi.fn(),
+}));
+
+import AuditPage from './AuditPage';
+import * as client from '../api/client';
+
+function renderWithQuery(ui: ReactNode) {
+  const qc = new QueryClient({
+    defaultOptions: { queries: { retry: false, gcTime: 0, staleTime: 0 } },
+  });
+  return render(
+    <QueryClientProvider client={qc}>
+      <MemoryRouter>{ui}</MemoryRouter>
+    </QueryClientProvider>,
+  );
+}
+
+const xssPayload = '<script data-xss="audit">window.__xss_pwned__=1;</script>';
+
+const xssEvent = {
+  id: 'ae-xss-001',
+  action: xssPayload,
+  actor: xssPayload,
+  actor_type: xssPayload,
+  resource_type: xssPayload,
+  resource_id: xssPayload,
+  details: { note: xssPayload },
+  timestamp: new Date().toISOString(),
+};
+
+describe('AuditPage — render + XSS hardening (M-026 / M-029 Pass 3)', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    cleanup();
+    delete (window as unknown as { __xss_pwned__?: number }).__xss_pwned__;
+  });
+
+  it('renders the page header when audit events resolve', async () => {
+    vi.mocked(client.getAuditEvents).mockResolvedValue({ data: [], total: 0, page: 1, per_page: 50 } as never);
+    renderWithQuery(<AuditPage />);
+    await waitFor(() => {
+      expect(screen.getByText(/Audit/)).toBeInTheDocument();
+    });
+  });
+
+  it('does NOT execute <script> payloads embedded in audit-event fields', async () => {
+    vi.mocked(client.getAuditEvents).mockResolvedValue({
+      data: [xssEvent],
+      total: 1,
+      page: 1,
+      per_page: 50,
+    } as never);
+
+    renderWithQuery(<AuditPage />);
+    await waitFor(() => {
+      expect(screen.getByText(/Audit/)).toBeInTheDocument();
+    });
+
+    const liveScripts = document.querySelectorAll('script[data-xss="audit"]');
+    expect(liveScripts.length, 'audit event must not inject a live <script>').toBe(0);
+    expect(
+      (window as unknown as { __xss_pwned__?: number }).__xss_pwned__,
+      'audit event <script> body must not have executed',
+    ).toBeUndefined();
+  });
+
+  it('renders the literal payload as escaped text', async () => {
+    vi.mocked(client.getAuditEvents).mockResolvedValue({
+      data: [xssEvent],
+      total: 1,
+      page: 1,
+      per_page: 50,
+    } as never);
+
+    renderWithQuery(<AuditPage />);
+    await waitFor(() => {
+      expect(document.body.textContent ?? '').toContain('<script data-xss="audit">');
+    });
+  });
+});