Domain Tests:
- StudentTests: entity creation and validation
- EmailTests: value object validation
- EnrollmentDomainServiceTests: business rules
Application Tests:
- EnrollStudentCommandTests: enrollment scenarios
- Max 3 subjects validation
- Same professor constraint
Uses xUnit, Moq, and FluentAssertions
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Andrés Eduardo García Márquez