A comprehensive API testing and QA automation project simulating a Retail Banking system. This project demonstrates end-to-end API testing practices including functional validation, negative testing, compliance checks, automation execution, and defect analysis using Postman and Newman.
The goal of this project is to simulate testing of a Retail Banking API system covering key banking operations such as:
- Customer creation
- Account management
- Funds transfer
- Compliance validation
- Fraud and risk scenarios
The project showcases how QA engineers design API test strategies, validate financial transactions, automate execution, and document defects.
- Design structured API test cases for banking workflows
- Validate transaction processing and business rules
- Perform negative and edge-case testing
- Simulate compliance and fraud detection scenarios
- Automate API execution using Newman
- Document defects and testing artifacts professionally
Test Data (transactions.csv)
↓
Postman API Collection
↓
Newman CLI Automation
↓
Mock Banking API (JSON Server)
↓
Database (db.json)
| Tool | Purpose |
|---|---|
| Postman | API testing & collection management |
| Newman | CLI automation runner |
| JSON Server | Mock API server |
| Node.js | Runtime environment |
| GitHub | Version control |
| Draw.io | Architecture diagram |
| Markdown | Documentation |
Retail-Banking-API-QA-Simulation
│
├── banking_api_collection.json
├── banking_env.json
├── transactions.csv
├── db.json
│
├── test-documents
│ ├── Architecture_Diagram.png
│ ├── Test_Strategy.md
│ ├── Test_Scenario_Matrix.md
│ └── Defect_Log.md
│
├── README.md
└── .gitignore
Install the following tools:
- Node.js
- Newman
- Postman (optional for manual testing)
npm install
npm start
The API server will start at:
newman run banking_api_collection.json -e banking_env.json -d transactions.csv
This command executes multiple API test scenarios including:
- Functional testing
- Negative validation
- Compliance scenarios
- Fraud detection simulations
The project covers several important banking test scenarios.
- Create customer
- Duplicate customer validation
- Missing field validation
- Account creation
- Account status validation
- Funds transfer
- Balance validation
- Daily transaction limit checks
- Invalid currency transfers
- Negative amount transactions
- Missing destination account
- Frozen account transactions
- AML transaction spikes
- Rapid consecutive transfers
Automation is executed using Newman CLI with external test data.
Execution command:
newman run banking_api_collection.json -e banking_env.json -d transactions.csv
The automation simulates multiple transaction scenarios automatically using the dataset.
During testing, several defects were identified and documented.
| Defect ID | Description | Severity |
|---|---|---|
| DEF-01 | Duplicate transaction ID allowed | High |
| DEF-02 | Invalid currency accepted | Medium |
| DEF-03 | Frozen account still processes transactions | Critical |
| DEF-04 | Negative transaction amount accepted | High |
| DEF-05 | Customer created without KYC validation | High |
Complete defect documentation can be found in:
test-documents/Defect_Log.md
The project includes professional QA documentation.
| Document | Description |
|---|---|
| Test Strategy | Overall testing approach |
| Test Scenario Matrix | Coverage of banking test cases |
| Defect Log | Identified defects |
| Architecture Diagram | API testing architecture |
Location:
test-documents/
This project demonstrates practical QA engineering skills including:
- API testing using Postman
- Automation using Newman CLI
- Negative and edge-case validation
- Banking transaction rule validation
- Defect documentation and analysis
- Test strategy and scenario design
- Automation data-driven testing
Possible improvements include:
- CI/CD integration with GitHub Actions
- Automated test reporting dashboards
- Performance testing with k6 or JMeter
- Security testing for authentication and authorization
- Integration with test management tools
Navya Kraleti
Quality Assurance Engineer
GitHub: https://github.com/NavyaKraleti