Comprehensive Tests for distributed energy resource manager contract

[FrankiePower]

Pull Request: Tests for Distributed Energy Resource Manager Contract

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📌 Description

This PR modularizes the test suite for the distributed-energy-resource-manager contract, organizing tests into focused modules and adding comprehensive edge case coverage. The implementation restructures the original 9 tests into 22 well-organized tests across three modules (registration, status, optimization), with reusable test utilities for improved maintainability and scalability.

closes #69

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📌 Type of Change

• Documentation (updates to docs or comments)
• Bug fix (non-breaking change fixing issues)
• Enhancement (improves test coverage and organization)
• Breaking change

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🎯 Motivation and Context

This PR addresses the need for comprehensive test coverage and better organization of the DER manager test suite. The previous implementation had all tests in a single test.rs file with limited edge case coverage. This restructuring improves:

• Test Organization: Tests are now grouped by functionality (registration, status updates, optimization)
• Edge Case Coverage: Added 13 new tests covering duplicate registrations, non-existent DERs, invalid operations, and scalability scenarios
• Maintainability: Reusable test utilities reduce code duplication
• Auditability: Clear test structure makes it easy to verify all requirements are tested

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📁 Changes Made

Test Structure

distributed-energy-resource-manager/src/tests/
├── mod.rs             // Module declarations
├── utils.rs           // Reusable test helpers (TestContext, setup functions, assertions)
├── registration.rs    // 8 tests for DER registration and initialization
├── status.rs          // 6 tests for DER status updates and statistics
└── optimization.rs    // 8 tests for resource optimization and emergency allocation

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🛠️ How to Test the Changes

1. Navigate to contract directory:

   cd soroban/contracts/distributed-energy-resource-manager

2. Run all tests:

   cargo test

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✅ Checklist Before Merging

• 🧪 I have tested the code and all 22 tests pass.
• 🎨 My changes follow the project's coding style and modular test patterns.
• 📖 Test utilities are well-documented with clear function purposes.
• ⚠️ No new warnings or errors were introduced (only existing warnings remain).
• 🔍 I have reviewed and approved my own code before submitting.
• 📊 Test coverage increased from 9 to 22 tests (+144% coverage).
• 🎯 All edge cases from requirements are covered.

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Conclusion

This PR successfully modularizes and enhances the test suite for the distributed-energy-resource-manager contract, providing comprehensive coverage of DER registration, status management, and optimization flows. The modular structure improves maintainability, testability, and auditability while ensuring reliable management of distributed energy resources through robust edge case handling and scalability testing.

[FrankiePower]

@salazarsebas this PR is ready to be reviewed and merged

[salazarsebas]

LGTM