test:playwright

Write Playwright Demo Tests

Write Playwright tests for recording narrated demo videos of the Kagenti platform.

When to Use

• Creating a new demo walkthrough test
• Reviewing an existing demo test for quality
• Fixing a failing demo test (wrong selectors, missing assertions)
• Called by playwright-demo before recording

Test Location

Source tests: .worktrees/playwright-demos/local_experiments/e2e/<name>.spec.ts

Required Structure

Every Playwright demo test MUST have:

1. Timestamp tracking

const stepTimestamps: { step: string; time: number }[] = [];
const demoStartTime = Date.now();
const markStep = (step: string) => {
  const elapsed = (Date.now() - demoStartTime) / 1000;
  stepTimestamps.push({ step, time: elapsed });
  console.log(`[demo-ts] ${elapsed.toFixed(1)}s - ${step}`);
};

2. Cursor injection

Copy injectCursor, humanMove, demoClick from existing tests. These create a visible red cursor dot in the video (headless Playwright has no cursor).

3. markStep at every visual transition

markStep('section_name');  // MUST be outside any if/catch block

Rules:

• ALWAYS outside conditionals (narration sync depends on every step firing)
• Each section should be 3-15 seconds
• Names must match [section] markers in narration file exactly

4. Section-level assertions

Tests MUST fail if content doesn't load. Never use silent .catch(() => {}):

// REQUIRED after login
expect(page.url()).not.toContain('/realms/');

// REQUIRED after SPA navigation
await expect(page).toHaveURL(/\/agents/, { timeout: 10000 });

// REQUIRED before critical interaction
await expect(element).toBeVisible({ timeout: 5000 });

// REQUIRED after content load
expect(cardCount, 'Page should have cards').toBeGreaterThan(0);

Keep .catch() ONLY for truly optional elements:

• VERIFY_PROFILE form fields
• scrollIntoViewIfNeeded
• waitForLoadState('networkidle')

5. SPA navigation (Kagenti pages)

Use sidebar clicks, NOT page.goto() — full reload loses Keycloak tokens:

// CORRECT - SPA client-side routing
const link = page.locator('nav a').filter({ hasText: /^Agents$/ });
await demoClick(link.first(), 'Agents sidebar');

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

Use page.goto() only for external apps (MLflow, Phoenix, Kiali).

6. Timestamps file

Write at test end:

const fs = require('fs');
const path = require('path');
const scriptDir = process.env.PLAYWRIGHT_OUTPUT_DIR || path.join(__dirname, '..');
const tsFile = path.join(scriptDir, '..', '<name>-timestamps.json');
fs.writeFileSync(tsFile, JSON.stringify(stepTimestamps, null, 2));

Selector Patterns

Read UI source (kagenti/ui-v2/src/pages/) to find correct selectors:

Multiple selector strategies

Try multiple selectors with .or() for resilience:

const chatTab = page.getByRole('tab', { name: /Chat/i })
  .or(page.locator('button:has-text("Chat")'))
  .or(page.locator('.pf-v5-c-tabs__link:has-text("Chat")'));

Narration File

Each test needs a matching narration file with one [section] per markStep():

[intro]
Welcome to the Kay-jentee platform...

[login]
We authenticate through Keycloak...

[section_name]
Description of what's visible on screen.

Pronunciation: Kay-jentee, A-to-A, M-C-P, mutual TLS, O-I-D-C.

Review Checklist

Before recording, verify:

• All markStep() calls outside conditionals
• Every section has expect() assertion (not silent .catch())
• markStep names match narration [section] markers 1:1
• SPA navigation for Kagenti pages (not page.goto())
• demoClick() used for cursor visibility (not .click())
• Timestamps written to <name>-timestamps.json
• 10-second final pause
• Test passes without narration: --no-narration

After Writing

1. Run test without narration to verify it passes
2. Fix any selector issues using playwright-demo:debug
3. Proceed to playwright-demo for recording with voiceover

Related Skills

• playwright-demo -- Record videos (uses this skill's tests)
• playwright-demo:debug -- Fix failing selectors and auth
• playwright-research -- Analyze UI code for selectors
• test:review -- General test quality review patterns