
Webapp Testing
- 1 installs
- Updated March 25, 2026
- crialabs/saass01
Test full-stack TypeScript SaaS applications with Next.js frontend and Fastify backend.
About
SAASS01 is a full-stack TypeScript monorepo with shared Zod schemas, Prisma migrations, and testing patterns. Includes frontend, API, and database test setup.
- Full-stack testing patterns
- Shared type definitions with Zod
Webapp Testing by the numbers
- 1 all-time installs (skills.sh)
- Ranked #1,750 of 2,153 Testing & QA skills by installs in the Skillselion catalog
- Data as of Jul 8, 2026 (Skillselion catalog sync)
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| Installs | 1 |
|---|---|
| Last updated | March 25, 2026 |
| Repository | crialabs/saass01 ↗ |
What it does
Test full-stack TypeScript SaaS applications with Next.js frontend and Fastify backend.
Files
Web Application Testing
This skill enables comprehensive testing and debugging of local web applications using Playwright automation.
When to Use This Skill
Use this skill when you need to:
- Test frontend functionality in a real browser
- Verify UI behavior and interactions
- Debug web application issues
- Capture screenshots for documentation or debugging
- Inspect browser console logs
- Validate form submissions and user flows
- Check responsive design across viewports
Prerequisites
- Node.js installed on the system
- A locally running web application (or accessible URL)
- Playwright will be installed automatically if not present
Core Capabilities
1. Browser Automation
- Navigate to URLs
- Click buttons and links
- Fill form fields
- Select dropdowns
- Handle dialogs and alerts
2. Verification
- Assert element presence
- Verify text content
- Check element visibility
- Validate URLs
- Test responsive behavior
3. Debugging
- Capture screenshots
- View console logs
- Inspect network requests
- Debug failed tests
Usage Examples
Example 1: Basic Navigation Test
// Navigate to a page and verify title
await page.goto('http://localhost:3000');
const title = await page.title();
console.log('Page title:', title);Example 2: Form Interaction
// Fill out and submit a form
await page.fill('#username', 'testuser');
await page.fill('#password', 'password123');
await page.click('button[type="submit"]');
await page.waitForURL('**/dashboard');Example 3: Screenshot Capture
// Capture a screenshot for debugging
await page.screenshot({ path: 'debug.png', fullPage: true });Guidelines
1. Always verify the app is running - Check that the local server is accessible before running tests 2. Use explicit waits - Wait for elements or navigation to complete before interacting 3. Capture screenshots on failure - Take screenshots to help debug issues 4. Clean up resources - Always close the browser when done 5. Handle timeouts gracefully - Set reasonable timeouts for slow operations 6. Test incrementally - Start with simple interactions before complex flows 7. Use selectors wisely - Prefer data-testid or role-based selectors over CSS classes
Common Patterns
Pattern: Wait for Element
await page.waitForSelector('#element-id', { state: 'visible' });Pattern: Check if Element Exists
const exists = (await page.locator('#element-id').count()) > 0;Pattern: Get Console Logs
page.on('console', (msg) => console.log('Browser log:', msg.text()));Pattern: Handle Errors
try {
await page.click('#button');
} catch (error) {
await page.screenshot({ path: 'error.png' });
throw error;
}Limitations
- Requires Node.js environment
- Cannot test native mobile apps (use React Native Testing Library instead)
- May have issues with complex authentication flows
- Some modern frameworks may require specific configuration
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See the License for the specific language governing permissions and
limitations under the License./**
* Helper utilities for web application testing with Playwright
*/
/**
* Wait for a condition to be true with timeout
* @param {Function} condition - Function that returns boolean
* @param {number} timeout - Timeout in milliseconds
* @param {number} interval - Check interval in milliseconds
*/
async function waitForCondition(condition, timeout = 5000, interval = 100) {
const startTime = Date.now();
while (Date.now() - startTime < timeout) {
if (await condition()) {
return true;
}
await new Promise((resolve) => setTimeout(resolve, interval));
}
throw new Error('Condition not met within timeout');
}
/**
* Capture browser console logs
* @param {Page} page - Playwright page object
* @returns {Array} Array of console messages
*/
function captureConsoleLogs(page) {
const logs = [];
page.on('console', (msg) => {
logs.push({
type: msg.type(),
text: msg.text(),
timestamp: new Date().toISOString(),
});
});
return logs;
}
/**
* Take screenshot with automatic naming
* @param {Page} page - Playwright page object
* @param {string} name - Base name for screenshot
*/
async function captureScreenshot(page, name) {
const timestamp = new Date().toISOString().replace(/[:.]/g, '-');
const filename = `${name}-${timestamp}.png`;
await page.screenshot({ path: filename, fullPage: true });
console.log(`Screenshot saved: ${filename}`);
return filename;
}
module.exports = {
waitForCondition,
captureConsoleLogs,
captureScreenshot,
};