[Testing] Integration: Multi-role assignment to single address #484

Bucket: Unit, Integration, and Fuzz Testing Matrix

Description: Develop robust test coverage for: Integration: Multi-role assignment to single address.

Step-by-Step Implementation Guide:

1. Open the corresponding test suite file.
2. Write isolated unit/fuzz/integration test for Integration: Multi-role assignment to single address.
3. Document test assertions.

Acceptance Criteria:

• Test passes reliably
• Edge cases are covered
• Uses standard testing frameworks/matchers

Complexity Level: Advanced (200 points)