Playwright Demo:debug

Debug Playwright Demo Issues

Troubleshoot and fix failing steps in Playwright demo walkthrough tests.

When to Use

• A demo recording step fails (selector not found, auth error, timeout)
• Narration-video alignment validation fails
• Video shows wrong content during narration
• Multiple voices overlapping in output

Debugging Workflow

1. Check the test output for [demo] log lines — identify which step failed
2. Look at screenshots in local_experiments/test-results/<test-dir>/test-failed-1.png
3. Run validation to check structural issues:

python3 local_experiments/validate-alignment.py

Common Issues

Selector not found

Symptom: element not visible or timeout waiting for selector

Screenshot the page to see actual DOM:

cd kagenti/ui-v2 && NODE_PATH=node_modules node -e "
const { chromium } = require('@playwright/test');
(async () => {
  const b = await chromium.launch();
  const p = await b.newPage({ ignoreHTTPSErrors: true });
  await p.goto('TARGET_URL', { waitUntil: 'networkidle', timeout: 30000 });
  await p.screenshot({ path: '/tmp/kagenti/debug.png', fullPage: true });
  const els = await p.evaluate(() =>
    Array.from(document.querySelectorAll('a, button, [role=tab]')).map(e => ({
      tag: e.tagName, text: e.textContent?.trim()?.substring(0, 50), href: e.href
    }))
  );
  console.log(JSON.stringify(els, null, 2));
  await b.close();
})();
"

Missing markStep timestamp

Symptom: Validation shows Section [name] has no markStep() timestamp

Fix: The markStep() call is inside a conditional block that didn't execute. Move it outside:

// WRONG - inside conditional
if (await element.isVisible()) {
  markStep('section_name');
  await element.click();
}

// RIGHT - outside conditional
markStep('section_name');
if (await element.isVisible()) {
  await element.click();
}

Keycloak auth lost on SPA navigation

Symptom: Page redirects to Keycloak after clicking sidebar link

Fix: Use SPA sidebar clicks (client-side routing), not page.goto():

// WRONG - full reload loses Keycloak tokens
await page.goto(`${UI_URL}/agents`);

// RIGHT - SPA navigation preserves tokens
const link = page.locator('nav a').filter({ hasText: /^Agents$/ });
await demoClick(link.first(), 'Agents sidebar');

MLflow OIDC login

Symptom: MLflow shows login page or "User not allowed"

MLflow uses 2-stage auth:

1. MLflow's own OIDC page at /oidc/ui/auth — click SSO button
2. Keycloak login (may auto-login if session exists)

After login, navigate to ${MLFLOW_URL}/#/experiments (hash routing).

Kiali OAuth

Symptom: OpenShift login page shown

Kiali uses OpenShift OAuth — needs kubeadmin credentials (separate from Keycloak). Script auto-discovers from <kubeconfig-dir>/kubeadmin-password.

Overlapping audio

Symptom: Multiple voices playing simultaneously

Cause: Missing timestamps → audio segments placed at wrong positions

Fix: Ensure ALL markStep() calls fire unconditionally. Run validation:

python3 local_experiments/validate-alignment.py

Check for NO TIMESTAMP errors. Fix those first.

Task Tracking

On invocation:

1. TaskCreate: playwright-demos | <cluster> | ad-hoc | debug | | <issue description>
2. TaskUpdate when issue is resolved

Related Skills

• playwright-demo — Main demo recording workflow
• kagenti:ui-debug — Debug Kagenti UI issues
• k8s:health — Check platform health