Building on the foundation established in Part 1, this second installment of the SAP RAP Purchase Document Management Series focuses on enhancing CDS View design and implementing robust testing strategies to ensure application accuracy, performance, and reliability.

As enterprise applications grow in complexity, business calculations become increasingly critical. One of the most important aspects of procurement applications is accurately determining item-level and overall document pricing. In this phase of development, we refine our Purchase Order Item CDS Views to support advanced pricing calculations while maintaining the clean architecture principles of SAP RAP.

This article demonstrates how to create enhanced CDS Views capable of calculating overall item prices dynamically, enabling better reporting, analytics, and transactional processing. By leveraging the power of Core Data Services (CDS), developers can push business logic closer to the database layer, improving performance and simplifying application maintenance.

Beyond CDS View optimization, this guide places significant emphasis on software quality through comprehensive testing. A dedicated ABAP test class is introduced to validate the Overall Price CDS View, ensuring that calculations remain accurate across various business scenarios and data conditions.

Testing is often overlooked during application development, yet it plays a crucial role in delivering enterprise-grade SAP solutions. Through practical examples, readers will learn how to design meaningful test cases, verify business calculations, and establish a repeatable quality assurance process that supports long-term application stability.

This article highlights the importance of combining technical precision with structured testing methodologies, enabling developers to build RAP applications that are not only functional but also reliable, scalable, and maintainable.

Whether you are an SAP ABAP developer exploring RAP for the first time or an experienced consultant seeking advanced development practices, this guide provides valuable insights into CDS View enhancement and quality-driven development.

Topics Covered

1. Enhancing Purchase Order Item CDS Views

• CDS View Design Principles
• Optimizing Item-Level Data Models
• Advanced Field Definitions
• Performance Considerations

2. Overall Price Calculation Logic

• Quantity and Unit Price Calculations
• Derived Fields in CDS Views
• Aggregated Pricing Scenarios
• Handling Complex Business Requirements

3. Advanced CDS View Techniques

• Calculated Fields
• Expressions and Annotations
• Data Consistency Strategies
• Reusable Data Models

4. SAP RAP Integration

• CDS Views in RAP Architecture
• Data Exposure and Consumption
• Business Object Integration

5. ABAP Unit Testing Fundamentals

• Importance of Test-Driven Development
• Unit Testing Best Practices
• Testing RAP-Based Applications

6. Building a Dedicated Test Class

• Test Class Structure
• Test Data Preparation
• Assertion Techniques
• Validation Scenarios

7. Testing Overall Price Calculations

• Positive Test Cases
• Negative Test Cases
• Edge Case Validation
• Data Accuracy Verification

8. Quality Assurance Strategies

• Improving Application Reliability
• Reducing Production Defects
• Continuous Testing Approaches

9. Performance and Maintainability

• Optimized CDS Design
• Testing for Scalability
• Long-Term Maintenance Considerations

10. Lessons Learned

• Development Challenges
• Best Practices Adopted
• Recommendations for RAP Developers

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