API Testing and Automation

  1. Core Concepts for API Testing
    1. HTTP Protocol Fundamentals
      1. Request-Response Model
        1. Client-Server Architecture
          1. Stateless Communication
          2. HTTP Methods
            1. GET Method
              1. Safe Operations
                1. Idempotent Nature
                2. POST Method
                  1. Resource Creation
                    1. Non-Idempotent Operations
                    2. PUT Method
                      1. Full Resource Updates
                        1. Idempotent Updates
                        2. PATCH Method
                          1. Partial Resource Updates
                          2. DELETE Method
                            1. Resource Removal
                            2. OPTIONS Method
                              1. Method Discovery
                              2. HEAD Method
                                1. Header-Only Responses
                              3. HTTP Status Codes
                                1. 1xx Informational Responses
                                  1. 100 Continue
                                    1. 101 Switching Protocols
                                    2. 2xx Success Responses
                                      1. 200 OK
                                        1. 201 Created
                                          1. 202 Accepted
                                            1. 204 No Content
                                            2. 3xx Redirection Responses
                                              1. 301 Moved Permanently
                                                1. 302 Found
                                                  1. 304 Not Modified
                                                  2. 4xx Client Error Responses
                                                    1. 400 Bad Request
                                                      1. 401 Unauthorized
                                                        1. 403 Forbidden
                                                          1. 404 Not Found
                                                            1. 405 Method Not Allowed
                                                              1. 409 Conflict
                                                                1. 422 Unprocessable Entity
                                                                  1. 429 Too Many Requests
                                                                  2. 5xx Server Error Responses
                                                                    1. 500 Internal Server Error
                                                                      1. 502 Bad Gateway
                                                                        1. 503 Service Unavailable
                                                                          1. 504 Gateway Timeout
                                                                        2. HTTPS and Security
                                                                          1. SSL/TLS Fundamentals
                                                                            1. Certificate Validation
                                                                              1. Encryption in Transit
                                                                            2. API Request Components
                                                                              1. Endpoint Structure
                                                                                1. Base URL
                                                                                  1. Resource Paths
                                                                                    1. URL Construction
                                                                                    2. Request Headers
                                                                                      1. Content-Type Header
                                                                                        1. Accept Header
                                                                                          1. Authorization Header
                                                                                            1. User-Agent Header
                                                                                              1. Custom Headers
                                                                                                1. Cache-Control Headers
                                                                                                2. Request Body
                                                                                                  1. JSON Payloads
                                                                                                    1. XML Payloads
                                                                                                      1. Form Data
                                                                                                        1. Multipart Data
                                                                                                          1. Binary Data
                                                                                                          2. Query Parameters
                                                                                                            1. Filtering Parameters
                                                                                                              1. Sorting Parameters
                                                                                                                1. Pagination Parameters
                                                                                                                  1. Search Parameters
                                                                                                                  2. Path Parameters
                                                                                                                    1. Resource Identification
                                                                                                                      1. URL Templating
                                                                                                                        1. Parameter Validation
                                                                                                                      2. API Response Components
                                                                                                                        1. Response Headers
                                                                                                                          1. Content-Type
                                                                                                                            1. Content-Length
                                                                                                                              1. Cache Headers
                                                                                                                                1. Security Headers
                                                                                                                                  1. Custom Response Headers
                                                                                                                                  2. Response Body Structure
                                                                                                                                    1. Data Payload
                                                                                                                                      1. Error Information
                                                                                                                                        1. Metadata
                                                                                                                                          1. Pagination Data
                                                                                                                                          2. Status Line Components
                                                                                                                                            1. HTTP Version
                                                                                                                                              1. Status Code
                                                                                                                                                1. Reason Phrase
                                                                                                                                              2. Data Formats
                                                                                                                                                1. JSON Format
                                                                                                                                                  1. Syntax and Structure
                                                                                                                                                    1. Objects and Arrays
                                                                                                                                                      1. Data Types
                                                                                                                                                        1. Nested Structures
                                                                                                                                                          1. JSON Schema
                                                                                                                                                          2. XML Format
                                                                                                                                                            1. Element Structure
                                                                                                                                                              1. Attributes
                                                                                                                                                                1. Namespaces
                                                                                                                                                                  1. XML Schema Definition
                                                                                                                                                                  2. Other Data Formats
                                                                                                                                                                    1. YAML
                                                                                                                                                                      1. Protocol Buffers
                                                                                                                                                                        1. Form-Encoded Data
                                                                                                                                                                          1. Plain Text
                                                                                                                                                                            1. Binary Formats
                                                                                                                                                                          2. Authentication and Authorization
                                                                                                                                                                            1. Authentication vs Authorization
                                                                                                                                                                              1. Basic Authentication
                                                                                                                                                                                1. Header Structure
                                                                                                                                                                                  1. Base64 Encoding
                                                                                                                                                                                    1. Security Considerations
                                                                                                                                                                                    2. API Key Authentication
                                                                                                                                                                                      1. Header-Based Keys
                                                                                                                                                                                        1. Query Parameter Keys
                                                                                                                                                                                          1. Key Management
                                                                                                                                                                                          2. Token-Based Authentication
                                                                                                                                                                                            1. Bearer Tokens
                                                                                                                                                                                              1. JWT Tokens
                                                                                                                                                                                                1. Header Structure
                                                                                                                                                                                                  1. Payload Claims
                                                                                                                                                                                                    1. Signature Verification
                                                                                                                                                                                                      1. Token Expiration
                                                                                                                                                                                                        1. Token Refresh
                                                                                                                                                                                                      2. OAuth Authentication
                                                                                                                                                                                                        1. OAuth 1.0a
                                                                                                                                                                                                          1. OAuth 2.0 Flows
                                                                                                                                                                                                            1. Authorization Code Flow
                                                                                                                                                                                                              1. Implicit Flow
                                                                                                                                                                                                                1. Client Credentials Flow
                                                                                                                                                                                                                  1. Resource Owner Password Flow
                                                                                                                                                                                                                  2. Scopes and Permissions
                                                                                                                                                                                                                  3. Session-Based Authentication
                                                                                                                                                                                                                    1. Multi-Factor Authentication
                                                                                                                                                                                                                      1. Certificate-Based Authentication

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                                                                                                                                                                                                                    1. Introduction to APIs and API Testing

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                                                                                                                                                                                                                    3. Manual API Testing