1.5Test Strategy for Different Product Types

SaaS Web Application

• Emphasis on cross-browser and responsive testing
• Feature flag testing (different user segments see different features)
• Multi-tenant testing (data isolation between customers)
• Continuous deployment means every commit must be testable
• A/B testing integration

Mobile Application

• Device and OS version fragmentation testing
• Network condition testing (offline, slow 3G, Wi-Fi)
• App store review compliance (guidelines change frequently)
• Push notification testing across platforms
• Battery and performance impact testing
• Installation, update, and migration testing

API Platform

• Contract testing with all consumers
• Rate limiting and throttling testing
• Backward compatibility testing for versioned APIs
• Documentation accuracy verification
• SDK testing across supported languages
• Authentication and authorization for every endpoint

Embedded Systems

• Hardware-in-the-loop testing
• Real-time performance constraints
• Firmware update and rollback testing
• Environmental testing (temperature, power fluctuations)
• Long-duration stability testing (days/weeks)
• Safety-critical certification requirements