Web Application Testing

Web Application Testing

Frontend Testing

Verifying UI/UX Elements

• UI/UX refers to the User Interface and User Experience.
• Test the visual and functional aspects of UI elements like buttons, text, dropdown lists, and toggle buttons.
• Verify behavior, such as:
  • Button clicks
  • Hover effects
  • Tooltips
  • Animations
• Tools: Applitools (AI-based visual testing tool)

Responsiveness and Cross-Browser Testing

• Ensure the application adapts and performs on devices with different screen sizes and resolutions.
• Validate:
  • Hamburger icon display on small screens
  • Proper text wrapping
  • No overlapping elements
  • Correct element alignment
  • Touch interactions on mobile devices
• Tools: Browser developer tools, LambdaTest, Sauce Labs

Validating CSS, HTML, and JavaScript Functionality

• Verify that the frontend technologies are implemented correctly and functioning as expected.

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Backend Testing

API Testing

• Use tools like Postman, Swagger, or REST Assured to validate API endpoints.

Database Testing

• Test database queries, constraints, and relationships to ensure data integrity.

Server-Side Validation

• Verify that the backend performs proper validation for all user inputs.

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Web-Specific Tests

Cross-Browser Compatibility

• Ensure consistent application behavior across various browsers and versions.
• Tools: LambdaTest, BrowserStack
• What to test:
  • UI elements
  • Styling
  • JavaScript behavior
  • Third-party integrations (e.g., payment gateways)

Cross-Device Compatibility

• Test on different devices like mobile, tablet, and desktop to ensure proper functionality.

Web Performance Testing

• Load Times: Verify the website loads in under 2 seconds.
  • Tool: Google Lighthouse
• Latency: Test network latency and server response time.
  • Tools: CDN tools, LoadRunner
• Resource Utilization:
  • Measure how efficiently CPU, memory, and bandwidth are utilized during peak usage.
  • Keep peak resource utilization under 80%.
  • Tools: Chrome DevTools, AWS CloudWatch, Dynatrace

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Security Testing

SQL Injection

• SQL Injection: Malicious SQL commands are injected into input fields to delete or modify the database.
  • Tools: Burp Suite, SQLMap

Cross-Site Scripting (XSS)

• XSS (Cross-Site Scripting) occurs when malicious input is injected into a website and executed on the client side.
  • Types:
    • Stored: Malicious code is stored on the server (e.g., in comments).
    • Reflected: Malicious code is reflected from the server (e.g., in query parameters).
    • DOM-Based: Attack occurs directly in the DOM.
  • Tool: Burp Suite
  • Example: Inject <script>alert('XSS')</script>. If an alert pops up, the application is vulnerable.

Cross-Site Request Forgery (CSRF)

• CSRF: Unauthorized actions are performed on behalf of an authenticated user.
  • Tool: Burp Suite

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Performance Testing

Load Testing

• Simulate a specified number of users to verify application functionality under expected traffic.

Stress Testing

• Simulate traffic beyond the expected load to find the application’s breakpoint.

Scalability Testing

• Test the application’s ability to scale up or down depending on the load.

Endurance Testing

• Test the application under load for an extended period to check for memory leaks or performance degradation.