fix(embedded-e2e): strengthen assertion signal-to-noise from review

Address /review-code findings — the previous round's hardening fixed
flake but a few assertions still gave weak signals:

- The chart-rendered selector matched a still-loading chart cell, since
  Superset's `Loading` spinner itself renders an SVG. Exclude the spinner
  via `:not(:has([data-test="loading-indicator"]))` and centralize the
  selector as `EmbeddedPage.RENDERED_CHART_SELECTOR`.
- The "dashboard renders" test only proved iframe/header chrome, not the
  dashboard. Add `waitForChartRendered()` so the test name matches what
  it asserts.
- The `hideTitle` test passed for the wrong reason if the locator
  drifted (`toBeHidden()` succeeds for absent elements). Add an explicit
  `toHaveCount(0)` so the contrast against the baseline visibility check
  in test 1 is load-bearing.
- `tokenCallCount` was a `>=1` check that any rendered dashboard would
  satisfy. Tighten to `=== 1` to actually exercise the SDK's caching
  contract.
- Drop the redundant `appUrl` shadow of `appServer.url`.
- Move `import os` to module top in the docker-light config; document
  the strict `"true"`-only env-var truthiness convention.

Pre-commit clean (type-check, prettier, oxlint, ruff, mypy). Local
re-verification blocked by an unrelated worktree env issue (semantic
layers feature has incomplete state — the docker-compose-light stack
doesn't bind-mount superset-core/, so the image's stale copy lacks the
new submodule); CI on the chromium-embedded project will validate.
Changes are strictly stronger assertions and refactors so they cannot
turn a previously-passing test into a false positive.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.github/workflows/bashlib.sh

@@ -59,6 +59,15 @@ build-assets() {
   say "::endgroup::"
 }
 
+build-embedded-sdk() {
+  cd "$GITHUB_WORKSPACE/superset-embedded-sdk"
+
+  say "::group::Build embedded SDK bundle for E2E tests"
+  npm ci
+  npm run build
+  say "::endgroup::"
+}
+
 build-instrumented-assets() {
   cd "$GITHUB_WORKSPACE/superset-frontend"
 

.github/workflows/superset-e2e.yml

@@ -169,6 +169,7 @@ jobs:
       PYTHONPATH: ${{ github.workspace }}
       REDIS_PORT: 16379
       GITHUB_TOKEN: ${{ github.token }}
+      SUPERSET_FEATURE_EMBEDDED_SUPERSET: "true"
     services:
       postgres:
         image: postgres:17-alpine
@@ -239,6 +240,11 @@ jobs:
         uses: ./.github/actions/cached-dependencies
         with:
           run: build-instrumented-assets
+      - name: Build embedded SDK
+        if: steps.check.outputs.python || steps.check.outputs.frontend
+        uses: ./.github/actions/cached-dependencies
+        with:
+          run: build-embedded-sdk
       - name: Install Playwright
         if: steps.check.outputs.python || steps.check.outputs.frontend
         uses: ./.github/actions/cached-dependencies

.github/workflows/superset-playwright.yml

@@ -43,6 +43,7 @@ jobs:
       PYTHONPATH: ${{ github.workspace }}
       REDIS_PORT: 16379
       GITHUB_TOKEN: ${{ github.token }}
+      SUPERSET_FEATURE_EMBEDDED_SUPERSET: "true"
     services:
       postgres:
         image: postgres:17-alpine
@@ -113,6 +114,11 @@ jobs:
         uses: ./.github/actions/cached-dependencies
         with:
           run: build-instrumented-assets
+      - name: Build embedded SDK
+        if: steps.check.outputs.python || steps.check.outputs.frontend
+        uses: ./.github/actions/cached-dependencies
+        with:
+          run: build-embedded-sdk
       - name: Install Playwright
         if: steps.check.outputs.python || steps.check.outputs.frontend
         uses: ./.github/actions/cached-dependencies

docker/pythonpath_dev/superset_config_docker_light.py

@@ -18,6 +18,8 @@
 # Configuration for docker-compose-light.yml - disables Redis and uses minimal services
 
 # Import all settings from the main config first
+import os
+
 from flask_caching.backends.filesystemcache import FileSystemCache
 
 from superset_config import *  # noqa: F403
@@ -36,3 +38,31 @@ THUMBNAIL_CACHE_CONFIG = CACHE_CONFIG
 
 # Disable Celery entirely for lightweight mode
 CELERY_CONFIG = None  # type: ignore[assignment,misc]
+
+# Honor SUPERSET_FEATURE_<NAME> env vars on top of any flags inherited from
+# superset_config. Lets local dev/e2e enable features (e.g. EMBEDDED_SUPERSET)
+# without editing shipped config files. Only the literal string "true"
+# (case-insensitive) is treated as enabled — "1"/"yes"/"on" are not, matching
+# the strict-string convention used elsewhere in Superset's env parsing.
+FEATURE_FLAGS = {
+    **FEATURE_FLAGS,  # noqa: F405
+    **{
+        name[len("SUPERSET_FEATURE_") :]: value.strip().lower() == "true"
+        for name, value in os.environ.items()
+        if name.startswith("SUPERSET_FEATURE_")
+    },
+}
+
+# Disable Talisman so /embedded/<uuid> doesn't return X-Frame-Options:SAMEORIGIN.
+# Without this, browsers refuse to render Superset inside an iframe from a
+# different origin (i.e. the embedded SDK use case). Production/CI configures
+# Talisman with explicit `frame-ancestors`; for the lightweight local stack we
+# just turn it off.
+TALISMAN_ENABLED = False
+
+# Guest tokens (used by the embedded SDK) inherit the "Public" role's perms.
+# Out of the box Public has zero perms, so embedded dashboards immediately fail
+# their first call (`/api/v1/me/roles/`) with 403. Mirror Public to Gamma —
+# the standard read-only viewer role — so the embedded flow can authenticate
+# and load dashboard data in local dev.
+PUBLIC_ROLE_LIKE = "Gamma"

superset-frontend/playwright.config.ts

@@ -95,6 +95,7 @@ export default defineConfig({
       testIgnore: [
         '**/tests/auth/**/*.spec.ts',
         '**/tests/sqllab/**/*.spec.ts',
+        '**/tests/embedded/**/*.spec.ts',
         ...(process.env.INCLUDE_EXPERIMENTAL ? [] : ['**/experimental/**']),
       ],
       use: {
@@ -132,6 +133,22 @@ export default defineConfig({
         // No storageState = clean browser with no cached cookies
       },
     },
+    {
+      // Embedded dashboard tests - validates the full embedding flow:
+      // external app -> SDK -> iframe -> guest token -> dashboard render.
+      // Each spec file mutates per-dashboard embedding state (UUID,
+      // allowed_domains) on a single shared Superset, so files must not
+      // run in parallel even if more are added later.
+      name: 'chromium-embedded',
+      testMatch: '**/tests/embedded/**/*.spec.ts',
+      fullyParallel: false,
+      use: {
+        browserName: 'chromium',
+        testIdAttribute: 'data-test',
+        // Uses admin auth for API calls to configure embedding and get guest tokens
+        storageState: 'playwright/.auth/user.json',
+      },
+    },
   ],
 
   // Web server setup - disabled in CI (Flask started separately in workflow)

superset-frontend/playwright/embedded-app/index.html

@@ -0,0 +1,96 @@
+<!--
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements.  See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership.  The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License.  You may obtain a copy of the License at
+
+  http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied.  See the License for the
+specific language governing permissions and limitations
+under the License.
+-->
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8" />
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  <title>Embedded Dashboard Test App</title>
+  <style>
+    html, body { margin: 0; padding: 0; height: 100%; }
+    #superset-container { width: 100%; height: 100vh; }
+    #superset-container iframe { width: 100%; height: 100%; border: none; }
+    #error { color: red; padding: 20px; display: none; }
+    #status { padding: 10px; font-family: monospace; font-size: 12px; }
+  </style>
+</head>
+<body>
+  <div id="status">Initializing embedded dashboard...</div>
+  <div id="error"></div>
+  <div id="superset-container" data-test="embedded-container"></div>
+
+  <script src="/sdk/index.js"></script>
+  <script>
+    (async function () {
+      const params = new URLSearchParams(window.location.search);
+      const uuid = params.get('uuid');
+      const supersetDomain = params.get('supersetDomain');
+
+      if (!uuid || !supersetDomain) {
+        document.getElementById('error').style.display = 'block';
+        document.getElementById('error').textContent =
+          'Missing required query params: uuid, supersetDomain';
+        return;
+      }
+
+      const statusEl = document.getElementById('status');
+
+      // fetchGuestToken is injected by Playwright via page.exposeFunction()
+      // Falls back to window.__guestToken for simple/static token injection
+      async function fetchGuestToken() {
+        if (typeof window.__fetchGuestToken === 'function') {
+          statusEl.textContent = 'Fetching guest token...';
+          const token = await window.__fetchGuestToken();
+          statusEl.textContent = 'Guest token received, loading dashboard...';
+          return token;
+        }
+        if (window.__guestToken) {
+          return window.__guestToken;
+        }
+        throw new Error('No guest token source available');
+      }
+
+      try {
+        // Parse optional UI config from query params
+        const uiConfig = {};
+        if (params.get('hideTitle') === 'true') uiConfig.hideTitle = true;
+        if (params.get('hideTab') === 'true') uiConfig.hideTab = true;
+        if (params.get('hideChartControls') === 'true') uiConfig.hideChartControls = true;
+
+        const dashboard = await supersetEmbeddedSdk.embedDashboard({
+          id: uuid,
+          supersetDomain: supersetDomain,
+          mountPoint: document.getElementById('superset-container'),
+          fetchGuestToken: fetchGuestToken,
+          dashboardUiConfig: Object.keys(uiConfig).length > 0 ? uiConfig : undefined,
+          debug: params.get('debug') === 'true',
+        });
+
+        statusEl.textContent = 'Dashboard embedded successfully';
+        // Expose dashboard API on window for Playwright assertions
+        window.__embeddedDashboard = dashboard;
+      } catch (err) {
+        document.getElementById('error').style.display = 'block';
+        document.getElementById('error').textContent = 'Embed failed: ' + err.message;
+        statusEl.textContent = 'Error';
+      }
+    })();
+  </script>
+</body>
+</html>

superset-frontend/playwright/helpers/api/dashboard.ts

@@ -132,26 +132,14 @@ export interface DashboardResult {
   published?: boolean;
 }
 
-/**
+async function getDashboardByFilter(
- * Get a dashboard by its title
- * @param page - Playwright page instance (provides authentication context)
- * @param title - The dashboard_title to search for
- * @returns Dashboard object if found, null if not found
- */
-export async function getDashboardByName(
   page: Page,
-  title: string,
+  col: 'dashboard_title' | 'slug',
+  value: string,
 ): Promise<DashboardResult | null> {
-  const filter = {
+  const queryParam = rison.encode({
-    filters: [
+    filters: [{ col, opr: 'eq', value }],
-      {
+  });
-        col: 'dashboard_title',
-        opr: 'eq',
-        value: title,
-      },
-    ],
-  };
-  const queryParam = rison.encode(filter);
   const response = await apiGet(
     page,
     `${ENDPOINTS.DASHBOARD}?q=${queryParam}`,
@@ -169,3 +157,29 @@ export async function getDashboardByName(
 
   return null;
 }
+
+/**
+ * Get a dashboard by its title
+ * @param page - Playwright page instance (provides authentication context)
+ * @param title - The dashboard_title to search for
+ * @returns Dashboard object if found, null if not found
+ */
+export async function getDashboardByName(
+  page: Page,
+  title: string,
+): Promise<DashboardResult | null> {
+  return getDashboardByFilter(page, 'dashboard_title', title);
+}
+
+/**
+ * Get a dashboard by its slug
+ * @param page - Playwright page instance (provides authentication context)
+ * @param slug - The slug to search for
+ * @returns Dashboard object if found, null if not found
+ */
+export async function getDashboardBySlug(
+  page: Page,
+  slug: string,
+): Promise<DashboardResult | null> {
+  return getDashboardByFilter(page, 'slug', slug);
+}

superset-frontend/playwright/helpers/api/embedded.ts

@@ -0,0 +1,136 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import { Page } from '@playwright/test';
+import { apiPost, apiPut, getCsrfToken } from './requests';
+import { ENDPOINTS as DASHBOARD_ENDPOINTS } from './dashboard';
+
+export const ENDPOINTS = {
+  SECURITY_LOGIN: 'api/v1/security/login',
+  GUEST_TOKEN: 'api/v1/security/guest_token/',
+} as const;
+
+export interface EmbeddedConfig {
+  uuid: string;
+  allowed_domains: string[];
+  dashboard_id: number;
+}
+
+/**
+ * Enable embedding on a dashboard and return the embedded UUID.
+ * Uses PUT (upsert) to preserve UUID across repeated calls.
+ * @param page - Playwright page instance (provides authentication context)
+ * @param dashboardIdOrSlug - Numeric dashboard id or slug
+ * @param allowedDomains - Domains allowed to embed; empty array allows all
+ * @returns Embedded config with UUID, allowed_domains, and dashboard_id
+ */
+export async function apiEnableEmbedding(
+  page: Page,
+  dashboardIdOrSlug: number | string,
+  allowedDomains: string[] = [],
+): Promise<EmbeddedConfig> {
+  const response = await apiPut(
+    page,
+    `${DASHBOARD_ENDPOINTS.DASHBOARD}${dashboardIdOrSlug}/embedded`,
+    { allowed_domains: allowedDomains },
+  );
+  const body = await response.json();
+  return body.result as EmbeddedConfig;
+}
+
+/**
+ * Login as admin and return the JWT access token used by the guest_token
+ * endpoint. Cache the result at suite level (`beforeAll`) and pass it into
+ * `getGuestToken` to avoid a fresh login on every test.
+ *
+ * Defaults match `playwright/global-setup.ts` so credentials come from one
+ * source (env vars). Overrides via `options` win.
+ */
+export async function getAccessToken(
+  page: Page,
+  options?: { username?: string; password?: string },
+): Promise<string> {
+  const username =
+    options?.username ?? process.env.PLAYWRIGHT_ADMIN_USERNAME ?? 'admin';
+  const password =
+    options?.password ?? process.env.PLAYWRIGHT_ADMIN_PASSWORD ?? 'general';
+  const loginResponse = await apiPost(
+    page,
+    ENDPOINTS.SECURITY_LOGIN,
+    {
+      username,
+      password,
+      provider: 'db',
+      refresh: true,
+    },
+    { allowMissingCsrf: true },
+  );
+  const loginBody = await loginResponse.json();
+  return loginBody.access_token;
+}
+
+/**
+ * Get a guest token for an embedded dashboard.
+ * If `accessToken` is provided, the login round-trip is skipped — preferred
+ * for tests that fetch many tokens from a single suite.
+ * @returns Signed guest token string
+ */
+export async function getGuestToken(
+  page: Page,
+  dashboardId: number | string,
+  options?: {
+    accessToken?: string;
+    username?: string;
+    password?: string;
+    rls?: Array<{ dataset: number; clause: string }>;
+  },
+): Promise<string> {
+  const accessToken =
+    options?.accessToken ??
+    (await getAccessToken(page, {
+      username: options?.username,
+      password: options?.password,
+    }));
+  const rls = options?.rls ?? [];
+
+  // The guest_token endpoint authenticates via JWT Bearer, but if the
+  // request also carries a session cookie (which page.request inherits from
+  // storageState), Flask-WTF still requires a matching X-CSRFToken. Send it
+  // unconditionally so this works whether the caller is authenticated via
+  // session, JWT, or both.
+  const { token: csrfToken } = await getCsrfToken(page);
+  const guestResponse = await page.request.post(ENDPOINTS.GUEST_TOKEN, {
+    data: {
+      user: {
+        username: 'embedded_test_user',
+        first_name: 'Embedded',
+        last_name: 'TestUser',
+      },
+      resources: [{ type: 'dashboard', id: String(dashboardId) }],
+      rls,
+    },
+    headers: {
+      'Content-Type': 'application/json',
+      Authorization: `Bearer ${accessToken}`,
+      ...(csrfToken ? { 'X-CSRFToken': csrfToken } : {}),
+    },
+  });
+  const guestBody = await guestResponse.json();
+  return guestBody.token;
+}

superset-frontend/playwright/helpers/api/requests.ts

@@ -39,7 +39,7 @@ function getBaseUrl(): string {
   return url.endsWith('/') ? url : `${url}/`;
 }
 
-interface CsrfResult {
+export interface CsrfResult {
   token: string;
   error?: string;
 }
@@ -49,7 +49,7 @@ interface CsrfResult {
  * Superset provides a CSRF token via api/v1/security/csrf_token/
  * The session cookie is automatically included by page.request
  */
-async function getCsrfToken(page: Page): Promise<CsrfResult> {
+export async function getCsrfToken(page: Page): Promise<CsrfResult> {
   try {
     const response = await page.request.get('api/v1/security/csrf_token/', {
       failOnStatusCode: false,

superset-frontend/playwright/pages/EmbeddedPage.ts

@@ -0,0 +1,172 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import { Page, FrameLocator, Locator, expect } from '@playwright/test';
+import { EMBEDDED } from '../utils/constants';
+
+/**
+ * Page object for the embedded dashboard test app.
+ *
+ * The test app runs on a separate origin (its origin is assigned per-suite
+ * via an OS-allocated port) and uses the @superset-ui/embedded-sdk to render
+ * a Superset dashboard in an iframe. Playwright's page.exposeFunction()
+ * bridges the guest token from Node.js into the browser page.
+ */
+export class EmbeddedPage {
+  private readonly page: Page;
+
+  private static readonly SELECTORS = {
+    CONTAINER: '[data-test="embedded-container"]',
+    IFRAME: 'iframe[title="Embedded Dashboard"]',
+    STATUS: '#status',
+    ERROR: '#error',
+  } as const;
+
+  constructor(page: Page) {
+    this.page = page;
+  }
+
+  /**
+   * Set up the guest token bridge before navigating.
+   * Must be called BEFORE goto() since embedDashboard() calls fetchGuestToken
+   * immediately on page load.
+   */
+  async exposeTokenFetcher(tokenFn: () => Promise<string>): Promise<void> {
+    await this.page.exposeFunction('__fetchGuestToken', tokenFn);
+  }
+
+  /**
+   * Navigate to the embedded test app with the given parameters.
+   * `appUrl` is the origin of the static test app (assigned dynamically by
+   * the spec's beforeAll fixture so workers don't collide on a fixed port).
+   */
+  async goto(params: {
+    appUrl: string;
+    uuid: string;
+    supersetDomain: string;
+    hideTitle?: boolean;
+    hideTab?: boolean;
+    hideChartControls?: boolean;
+    debug?: boolean;
+  }): Promise<void> {
+    const searchParams = new URLSearchParams({
+      uuid: params.uuid,
+      supersetDomain: params.supersetDomain,
+    });
+    if (params.hideTitle) searchParams.set('hideTitle', 'true');
+    if (params.hideTab) searchParams.set('hideTab', 'true');
+    if (params.hideChartControls) searchParams.set('hideChartControls', 'true');
+    if (params.debug) searchParams.set('debug', 'true');
+
+    await this.page.goto(`${params.appUrl}/?${searchParams.toString()}`);
+  }
+
+  /**
+   * FrameLocator for the embedded dashboard iframe.
+   */
+  get iframe(): FrameLocator {
+    return this.page.frameLocator(EmbeddedPage.SELECTORS.IFRAME);
+  }
+
+  /**
+   * Wait for the iframe to appear in the DOM AND have its src set.
+   * The SDK appends the iframe element before assigning src, so a bare
+   * `state: 'attached'` wait races the src read.
+   */
+  async waitForIframe(options?: { timeout?: number }): Promise<void> {
+    const locator = this.page.locator(EmbeddedPage.SELECTORS.IFRAME);
+    await locator.waitFor({
+      state: 'attached',
+      timeout: options?.timeout ?? EMBEDDED.IFRAME_LOAD,
+    });
+    await expect(locator).toHaveAttribute('src', /.+/, {
+      timeout: options?.timeout ?? EMBEDDED.IFRAME_LOAD,
+    });
+  }
+
+  /**
+   * Wait for dashboard content to render inside the iframe.
+   * Looks for the grid-container which indicates charts are loading/loaded.
+   */
+  async waitForDashboardContent(options?: { timeout?: number }): Promise<void> {
+    const frame = this.iframe;
+    await frame
+      .locator('.grid-container, [data-test="grid-container"]')
+      .first()
+      .waitFor({
+        state: 'visible',
+        timeout: options?.timeout ?? EMBEDDED.DASHBOARD_RENDER,
+      });
+  }
+
+  /**
+   * Matches a chart cell that has finished loading: it contains a real viz
+   * element (svg, canvas, table) AND no longer hosts the `Loading` spinner
+   * (`data-test="loading-indicator"`). Excluding the spinner matters —
+   * the spinner itself renders an SVG, so a `:has(svg)`-only check can match
+   * a still-loading chart for the wrong reason.
+   */
+  static readonly RENDERED_CHART_SELECTOR =
+    '[data-test="chart-container"]:has(svg, canvas, table):not(:has([data-test="loading-indicator"]))';
+
+  /**
+   * Wait for at least one chart to finish rendering — viz drawn AND no
+   * loading spinner in that cell.
+   */
+  async waitForChartRendered(options?: { timeout?: number }): Promise<void> {
+    await this.iframe
+      .locator(EmbeddedPage.RENDERED_CHART_SELECTOR)
+      .first()
+      .waitFor({
+        state: 'visible',
+        timeout: options?.timeout ?? EMBEDDED.CHART_RENDER,
+      });
+  }
+
+  /**
+   * Locator for the dashboard title input inside the iframe.
+   * Returned as a `Locator` so callers can use `expect(...).toBeVisible()` /
+   * `.toBeHidden()` with auto-retry instead of one-shot `.isVisible()`.
+   */
+  get titleLocator(): Locator {
+    return this.iframe.locator(
+      '[data-test="dashboard-header-container"] [data-test="editable-title-input"]',
+    );
+  }
+
+  /**
+   * Get the status text from the test app.
+   */
+  async getStatus(): Promise<string> {
+    return (
+      (await this.page.locator(EmbeddedPage.SELECTORS.STATUS).textContent()) ??
+      ''
+    );
+  }
+
+  /**
+   * Get the error text, if any.
+   */
+  async getError(): Promise<string> {
+    const errorEl = this.page.locator(EmbeddedPage.SELECTORS.ERROR);
+    const display = await errorEl.evaluate(el => getComputedStyle(el).display);
+    if (display === 'none') return '';
+    return (await errorEl.textContent()) ?? '';
+  }
+}

superset-frontend/playwright/tests/embedded/embedded-dashboard.spec.ts

@@ -0,0 +1,356 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import { test, expect, Browser, BrowserContext, Page } from '@playwright/test';
+import { createServer, IncomingMessage, ServerResponse, Server } from 'http';
+import { AddressInfo, Socket } from 'net';
+import { readFileSync, existsSync } from 'fs';
+import { join } from 'path';
+import {
+  apiEnableEmbedding,
+  getAccessToken,
+  getGuestToken,
+} from '../../helpers/api/embedded';
+import { getDashboardBySlug } from '../../helpers/api/dashboard';
+import { EmbeddedPage } from '../../pages/EmbeddedPage';
+
+/**
+ * Superset domain (Flask server) — set by CI or defaults to local dev
+ */
+const SUPERSET_DOMAIN = (() => {
+  const url = process.env.PLAYWRIGHT_BASE_URL || 'http://localhost:8088';
+  return url.replace(/\/+$/, '');
+})();
+
+const SUPERSET_BASE_URL = SUPERSET_DOMAIN.endsWith('/')
+  ? SUPERSET_DOMAIN
+  : `${SUPERSET_DOMAIN}/`;
+
+/**
+ * Path to the SDK bundle built from superset-embedded-sdk/
+ */
+const SDK_BUNDLE_PATH = join(
+  __dirname,
+  '../../../../superset-embedded-sdk/bundle/index.js',
+);
+
+/**
+ * Path to the embedded test app static files
+ */
+const EMBED_APP_DIR = join(__dirname, '../../embedded-app');
+
+/**
+ * Create a minimal static file server for the embedded test app.
+ * Serves only a fixed allowlist of routes — the test app references just
+ * its index.html and the SDK bundle, so anything else is 404.
+ */
+const INDEX_HTML_PATH = join(EMBED_APP_DIR, 'index.html');
+
+interface EmbedAppServer {
+  server: Server;
+  url: string;
+  close: () => Promise<void>;
+}
+
+/**
+ * Start the static test app on an OS-assigned ephemeral port. Tracks open
+ * sockets so close() doesn't hang on iframe keep-alive connections, and so
+ * different workers/retries never collide on a fixed port.
+ */
+async function startEmbedAppServer(): Promise<EmbedAppServer> {
+  const sockets = new Set<Socket>();
+  const server = createServer((req: IncomingMessage, res: ServerResponse) => {
+    const urlPath = req.url?.split('?')[0] || '/';
+
+    if (urlPath === '/sdk/index.js') {
+      if (!existsSync(SDK_BUNDLE_PATH)) {
+        res.writeHead(404);
+        res.end(
+          'SDK bundle not found. Run: cd superset-embedded-sdk && npm ci && npm run build',
+        );
+        return;
+      }
+      res.writeHead(200, { 'Content-Type': 'text/javascript' });
+      res.end(readFileSync(SDK_BUNDLE_PATH));
+      return;
+    }
+
+    if (urlPath === '/' || urlPath === '/index.html') {
+      res.writeHead(200, { 'Content-Type': 'text/html' });
+      res.end(readFileSync(INDEX_HTML_PATH));
+      return;
+    }
+
+    res.writeHead(404);
+    res.end('Not found');
+  });
+
+  server.on('connection', socket => {
+    sockets.add(socket);
+    socket.once('close', () => sockets.delete(socket));
+  });
+
+  await new Promise<void>((resolve, reject) => {
+    server.once('error', reject);
+    server.listen(0, '127.0.0.1', () => {
+      server.removeListener('error', reject);
+      resolve();
+    });
+  });
+
+  const address = server.address() as AddressInfo;
+  const url = `http://127.0.0.1:${address.port}`;
+
+  return {
+    server,
+    url,
+    close: () =>
+      new Promise<void>(resolve => {
+        for (const socket of sockets) socket.destroy();
+        sockets.clear();
+        server.close(() => resolve());
+      }),
+  };
+}
+
+/**
+ * Create a browser context authenticated as admin for API-only work
+ * (enabling embedding, restoring config). Caller is responsible for closing.
+ */
+function createAdminContext(browser: Browser): Promise<BrowserContext> {
+  return browser.newContext({
+    storageState: 'playwright/.auth/user.json',
+    baseURL: SUPERSET_BASE_URL,
+  });
+}
+
+// ─── Test Suite ────────────────────────────────────────────────────────────
+
+// Describe wrapper is needed for shared server state and serial execution:
+// all tests share a static file server and must not run in parallel.
+test.describe('Embedded Dashboard E2E', () => {
+  test.describe.configure({ mode: 'serial' });
+
+  // The full embedded chain (login → guest token → iframe → dashboard render
+  // → chart render) routinely exceeds the 30s default on cold CI starts.
+  test.setTimeout(60000);
+
+  let appServer: EmbedAppServer;
+  let accessToken: string;
+  let embedUuid: string;
+  let dashboardId: number;
+
+  /**
+   * Set up a page to render the default embedded dashboard.
+   * Tests that need a different UUID or UI config should not use this helper.
+   */
+  async function setupEmbeddedPage(page: Page): Promise<EmbeddedPage> {
+    const embeddedPage = new EmbeddedPage(page);
+    await embeddedPage.exposeTokenFetcher(async () =>
+      getGuestToken(page, dashboardId, { accessToken }),
+    );
+    await embeddedPage.goto({
+      appUrl: appServer.url,
+      uuid: embedUuid,
+      supersetDomain: SUPERSET_DOMAIN,
+    });
+    await embeddedPage.waitForIframe();
+    await embeddedPage.waitForDashboardContent();
+    return embeddedPage;
+  }
+
+  test.beforeAll(async ({ browser }) => {
+    // Skip all tests if the SDK bundle hasn't been built
+    test.skip(
+      !existsSync(SDK_BUNDLE_PATH),
+      'Embedded SDK bundle not found. Build it with: cd superset-embedded-sdk && npm ci && npm run build',
+    );
+
+    appServer = await startEmbedAppServer();
+
+    // Use a fresh context with auth to set up test data via API
+    const context = await createAdminContext(browser);
+    const setupPage = await context.newPage();
+
+    try {
+      const dashboard = await getDashboardBySlug(setupPage, 'world_health');
+      if (!dashboard) {
+        throw new Error(
+          'Dashboard "world_health" not found. Ensure load_examples ran in CI setup.',
+        );
+      }
+      dashboardId = dashboard.id;
+
+      // Enable embedding on the dashboard (empty allowed_domains = allow all)
+      const embedded = await apiEnableEmbedding(setupPage, dashboardId);
+      embedUuid = embedded.uuid;
+
+      // Cache the JWT access token so tests don't re-login per guest token.
+      accessToken = await getAccessToken(setupPage);
+    } finally {
+      await context.close();
+    }
+  });
+
+  test.afterAll(async ({ browser }) => {
+    // Defensive restore in case the allowed_domains test failed mid-flight.
+    if (dashboardId !== undefined) {
+      const context = await createAdminContext(browser);
+      try {
+        const setupPage = await context.newPage();
+        await apiEnableEmbedding(setupPage, dashboardId, []);
+      } catch {
+        // Best-effort cleanup — never fail teardown.
+      } finally {
+        await context.close();
+      }
+    }
+
+    if (appServer) await appServer.close();
+  });
+
+  test('dashboard renders in embedded iframe', async ({ page }) => {
+    const embeddedPage = await setupEmbeddedPage(page);
+
+    // Verify the iframe src points to Superset's /embedded/ endpoint
+    await expect(
+      page.locator('iframe[title="Embedded Dashboard"]'),
+    ).toHaveAttribute('src', new RegExp(`/embedded/${embedUuid}`));
+
+    // Verify no errors in the test app
+    expect(await embeddedPage.getError()).toBe('');
+
+    // Baseline: title should be visible when hideTitle is not set. This
+    // doubles as a positive existence check the `hideTitle` test relies on
+    // for distinguishing "title was hidden" from "selector is wrong".
+    await expect(embeddedPage.titleLocator).toBeVisible();
+
+    // Prove the dashboard actually renders, not just the chrome.
+    await embeddedPage.waitForChartRendered();
+  });
+
+  test('UI config hideTitle hides dashboard title', async ({ page }) => {
+    const embeddedPage = new EmbeddedPage(page);
+    await embeddedPage.exposeTokenFetcher(async () =>
+      getGuestToken(page, dashboardId, { accessToken }),
+    );
+    await embeddedPage.goto({
+      appUrl: appServer.url,
+      uuid: embedUuid,
+      supersetDomain: SUPERSET_DOMAIN,
+      hideTitle: true,
+    });
+    await embeddedPage.waitForIframe();
+    await embeddedPage.waitForDashboardContent();
+
+    // The iframe URL should include uiConfig parameter
+    await expect(
+      page.locator('iframe[title="Embedded Dashboard"]'),
+    ).toHaveAttribute('src', /uiConfig=/);
+
+    // hideTitle removes the header from the DOM (rather than CSS-hiding it),
+    // so toBeHidden + toHaveCount(0) together assert: not visible AND
+    // confirmed-removed (so the test can't pass for the wrong reason if the
+    // selector ever drifts — the baseline test asserts the selector matches
+    // when hideTitle is off).
+    await expect(embeddedPage.titleLocator).toBeHidden();
+    await expect(embeddedPage.titleLocator).toHaveCount(0);
+  });
+
+  test('charts render inside embedded iframe', async ({ page }) => {
+    const embeddedPage = await setupEmbeddedPage(page);
+
+    await embeddedPage.waitForChartRendered();
+    const renderedCharts = embeddedPage.iframe.locator(
+      EmbeddedPage.RENDERED_CHART_SELECTOR,
+    );
+    expect(await renderedCharts.count()).toBeGreaterThan(0);
+  });
+
+  test('allowed_domains blocks unauthorized referrer', async ({
+    page,
+    browser,
+  }) => {
+    const context = await createAdminContext(browser);
+    const setupPage = await context.newPage();
+
+    try {
+      // Restrict to a domain that is NOT the test app's origin
+      const restrictedEmbed = await apiEnableEmbedding(setupPage, dashboardId, [
+        'https://allowed.example.com',
+      ]);
+
+      const embeddedPage = new EmbeddedPage(page);
+      await embeddedPage.exposeTokenFetcher(async () =>
+        getGuestToken(page, dashboardId, { accessToken }),
+      );
+
+      // The deterministic signal that the referrer check fired is the HTTP
+      // status of the /embedded/<uuid> response — assert that directly rather
+      // than racing against cross-origin iframe rendering.
+      const embeddedResponsePromise = page.waitForResponse(
+        resp =>
+          resp.url().includes(`/embedded/${restrictedEmbed.uuid}`) &&
+          resp.request().resourceType() === 'document',
+      );
+
+      await embeddedPage.goto({
+        appUrl: appServer.url,
+        uuid: restrictedEmbed.uuid,
+        supersetDomain: SUPERSET_DOMAIN,
+      });
+
+      const response = await embeddedResponsePromise;
+      expect(response.status()).toBe(403);
+    } finally {
+      // Restore the open embedding config for other tests in this file.
+      await apiEnableEmbedding(setupPage, dashboardId, []);
+      await context.close();
+    }
+  });
+
+  test('guest token enables dashboard data access', async ({ page }) => {
+    const embeddedPage = new EmbeddedPage(page);
+
+    let tokenCallCount = 0;
+    await embeddedPage.exposeTokenFetcher(async () => {
+      tokenCallCount += 1;
+      return getGuestToken(page, dashboardId, { accessToken });
+    });
+
+    await embeddedPage.goto({
+      appUrl: appServer.url,
+      uuid: embedUuid,
+      supersetDomain: SUPERSET_DOMAIN,
+    });
+    await embeddedPage.waitForIframe();
+    await embeddedPage.waitForDashboardContent();
+    await embeddedPage.waitForChartRendered();
+
+    // The SDK fetches the token exactly once per embed (caching is the
+    // SDK's responsibility, not ours) — assert the stronger invariant.
+    expect(tokenCallCount).toBe(1);
+
+    // Confirm at least one chart actually rendered with data, not just its shell
+    const renderedCharts = embeddedPage.iframe.locator(
+      EmbeddedPage.RENDERED_CHART_SELECTOR,
+    );
+    expect(await renderedCharts.count()).toBeGreaterThan(0);
+  });
+});

superset-frontend/playwright/utils/constants.ts

@@ -75,3 +75,16 @@ export const TIMEOUT = {
    */
   SLOW_TEST: 60000, // 60s for tests that chain multiple slow operations
 } as const;
+
+/**
+ * Embedded dashboard test app configuration.
+ * The test app is served by a Node.js http server started in the test fixture.
+ */
+export const EMBEDDED = {
+  /** Timeout for iframe to appear in the DOM */
+  IFRAME_LOAD: 15000, // 15s
+  /** Timeout for dashboard content to render inside the iframe */
+  DASHBOARD_RENDER: 30000, // 30s
+  /** Timeout for individual chart cells to finish rendering */
+  CHART_RENDER: 30000, // 30s
+} as const;

tests/integration_tests/superset_test_config.py

@@ -78,6 +78,15 @@ FEATURE_FLAGS = {
 
 WEBDRIVER_BASEURL = "http://0.0.0.0:8081/"
 
+# Enable CORS for embedded dashboard E2E tests (test app on port 9000)
+ENABLE_CORS = True
+CORS_OPTIONS: dict = {
+    "origins": [
+        "http://localhost:9000",
+    ],
+    "supports_credentials": True,
+}
+
 
 def GET_FEATURE_FLAGS_FUNC(ff):  # noqa: N802
     ff_copy = copy(ff)
@@ -86,6 +95,7 @@ def GET_FEATURE_FLAGS_FUNC(ff):  # noqa: N802
 
 
 TESTING = True
+TALISMAN_ENABLED = False
 WTF_CSRF_ENABLED = False
 
 FAB_ROLES = {"TestRole": [["Security", "menu_access"], ["List Users", "menu_access"]]}