API Testing and Automation

  1. Types of API Testing
    1. Functional Testing
      1. Endpoint Functionality
        1. Core Business Logic
          1. Feature Completeness
            1. Integration Points
            2. Input Validation Testing
              1. Valid Input Scenarios
                1. Invalid Input Scenarios
                  1. Boundary Value Testing
                    1. Data Type Validation
                    2. Output Validation Testing
                      1. Response Format Validation
                        1. Data Accuracy
                          1. Completeness Checks
                          2. Error Handling Testing
                            1. Error Code Validation
                              1. Error Message Quality
                                1. Exception Scenarios
                                2. Schema Validation
                                  1. JSON Schema Validation
                                    1. XML Schema Validation
                                      1. Response Structure Verification
                                      2. State Management Testing
                                        1. Idempotency Testing
                                          1. State Transitions
                                            1. Data Consistency
                                            2. Business Logic Testing
                                              1. Workflow Validation
                                                1. Rule Engine Testing
                                                  1. Calculation Verification
                                                2. Performance Testing
                                                  1. Load Testing
                                                    1. Normal Load Simulation
                                                      1. Concurrent User Testing
                                                        1. Throughput Measurement
                                                          1. Resource Utilization
                                                          2. Stress Testing
                                                            1. Breaking Point Identification
                                                              1. System Limits
                                                                1. Recovery Testing
                                                                2. Volume Testing
                                                                  1. Large Data Sets
                                                                    1. Bulk Operations
                                                                      1. Storage Limits
                                                                      2. Spike Testing
                                                                        1. Sudden Load Increases
                                                                          1. Traffic Bursts
                                                                            1. Auto-scaling Validation
                                                                            2. Endurance Testing
                                                                              1. Long Duration Testing
                                                                                1. Memory Leaks
                                                                                  1. Performance Degradation
                                                                                  2. Performance Metrics
                                                                                    1. Response Time
                                                                                      1. Latency
                                                                                        1. Throughput
                                                                                          1. Error Rate
                                                                                            1. Resource Consumption
                                                                                          2. Security Testing
                                                                                            1. Authentication Testing
                                                                                              1. Credential Validation
                                                                                                1. Session Management
                                                                                                  1. Multi-Factor Authentication
                                                                                                  2. Authorization Testing
                                                                                                    1. Access Control
                                                                                                      1. Role-Based Permissions
                                                                                                        1. Privilege Escalation
                                                                                                        2. Input Security Testing
                                                                                                          1. SQL Injection
                                                                                                            1. NoSQL Injection
                                                                                                              1. Command Injection
                                                                                                                1. Script Injection
                                                                                                                2. Data Security Testing
                                                                                                                  1. Sensitive Data Exposure
                                                                                                                    1. Data Encryption
                                                                                                                      1. Information Disclosure
                                                                                                                      2. Transport Security Testing
                                                                                                                        1. HTTPS Implementation
                                                                                                                          1. Certificate Validation
                                                                                                                            1. Protocol Security
                                                                                                                            2. Rate Limiting Testing
                                                                                                                              1. Throttling Mechanisms
                                                                                                                                1. DDoS Protection
                                                                                                                                  1. Abuse Prevention
                                                                                                                                  2. Parameter Security Testing
                                                                                                                                    1. Parameter Tampering
                                                                                                                                      1. Hidden Field Manipulation
                                                                                                                                        1. URL Manipulation
                                                                                                                                        2. Session Security Testing
                                                                                                                                          1. Session Fixation
                                                                                                                                            1. Session Hijacking
                                                                                                                                              1. CSRF Protection
                                                                                                                                            2. Contract Testing
                                                                                                                                              1. Consumer-Driven Contracts
                                                                                                                                                1. Contract Definition
                                                                                                                                                  1. Consumer Expectations
                                                                                                                                                    1. Provider Verification
                                                                                                                                                    2. Provider-Driven Contracts
                                                                                                                                                      1. API Specification
                                                                                                                                                        1. Consumer Validation
                                                                                                                                                          1. Backward Compatibility
                                                                                                                                                          2. Contract Testing Tools
                                                                                                                                                            1. Pact Framework
                                                                                                                                                              1. Spring Cloud Contract
                                                                                                                                                                1. OpenAPI Contracts
                                                                                                                                                                2. Versioning and Evolution
                                                                                                                                                                  1. API Versioning Strategies
                                                                                                                                                                    1. Breaking Changes
                                                                                                                                                                      1. Deprecation Management
                                                                                                                                                                    2. Integration Testing
                                                                                                                                                                      1. Service-to-Service Integration
                                                                                                                                                                        1. Microservices Communication
                                                                                                                                                                          1. Data Flow Validation
                                                                                                                                                                            1. Error Propagation
                                                                                                                                                                            2. Third-Party Integration
                                                                                                                                                                              1. External API Dependencies
                                                                                                                                                                                1. Vendor API Testing
                                                                                                                                                                                  1. Fallback Mechanisms
                                                                                                                                                                                  2. Database Integration
                                                                                                                                                                                    1. Data Persistence
                                                                                                                                                                                      1. Transaction Management
                                                                                                                                                                                        1. Data Integrity
                                                                                                                                                                                        2. Message Queue Integration
                                                                                                                                                                                          1. Asynchronous Processing
                                                                                                                                                                                            1. Message Validation
                                                                                                                                                                                              1. Queue Management
                                                                                                                                                                                            2. Usability Testing
                                                                                                                                                                                              1. API Documentation Quality
                                                                                                                                                                                                1. Completeness
                                                                                                                                                                                                  1. Accuracy
                                                                                                                                                                                                    1. Clarity
                                                                                                                                                                                                    2. Developer Experience
                                                                                                                                                                                                      1. Ease of Integration
                                                                                                                                                                                                        1. Learning Curve
                                                                                                                                                                                                          1. Error Messages
                                                                                                                                                                                                          2. Consistency Testing
                                                                                                                                                                                                            1. Naming Conventions
                                                                                                                                                                                                              1. Response Patterns
                                                                                                                                                                                                                1. Error Handling

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                                                                                                                                                                                                            3. Manual API Testing

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                                                                                                                                                                                                            5. API Test Automation