feat: Phase 1 Week 4 - Testing & Documentation

[lakshayman]

Date: 16 Jan 2025

Developer Name: [Your Name]

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Description

This PR implements Phase 1, Week 4: Testing & Documentation for the Feature Flag Backend. It adds comprehensive unit tests for the RBAC system and updates documentation to reflect the new authentication and authorization features.

Key Features Implemented:

1. Comprehensive RBAC Unit Tests

   • Added RBAC_test.go with 30+ test cases
   • Tests for HasPermission() function covering all roles and permissions
   • Tests for RequirePermission() helper function
   • Tests for RequireAnyPermission() helper function
   • Tests for CanAccessUserResource() resource ownership validation
   • Complete permission matrix validation for all three roles (ADMIN, DEVELOPER, VIEWER)
   • Edge case testing (nil user context, unknown roles)

2. Documentation Updates

   • Authentication Section: Added user registration and login flow documentation
   • RBAC Section: Comprehensive role-based access control documentation
   • Permission Matrix: Visual table showing permissions for each role
   • Resource Ownership Rules: Documentation on who can access which resources
   • API Endpoints: Updated with permission requirements for each endpoint
   • Data Model: Added User table schema documentation

3. Test Coverage

   • All RBAC permission checks covered
   • All role combinations tested
   • Resource ownership logic validated
   • Edge cases and error scenarios tested

Test Results

All tests passing:

• ✅ TestHasPermission - 9 test cases
• ✅ TestRequirePermission - 4 test cases
• ✅ TestRequireAnyPermission - 4 test cases
• ✅ TestCanAccessUserResource - 5 test cases
• ✅ TestRolePermissions - 30 test cases (complete permission matrix)

Total: 52 test cases, all passing

Documentation Updated?

• Yes
• No

Documentation Updates:

• README.md updated with authentication and RBAC sections
• API endpoints documented with permission requirements
• Data model updated to include User table
• Resource ownership rules documented

Under Feature Flag

• Yes
• No

Database Changes

• Yes
• No

Database Changes:

• No schema changes
• Documentation reflects existing User table structure

Breaking Changes

• Yes
• No

Development Tested?

• Yes
• No

Testing:

• ✅ All unit tests pass (52 test cases)
• ✅ RBAC permission system fully tested
• ✅ Resource ownership validation tested
• ✅ Edge cases and error scenarios covered

Test Coverage

Test Coverage Details

Test Coverage Summary

RBAC Permission System:

• ✅ Permission checking for all roles (ADMIN, DEVELOPER, VIEWER)
• ✅ All 10 permission types tested
• ✅ Permission denial scenarios tested
• ✅ Unknown role handling tested

Helper Functions:

• ✅ RequirePermission() - Success and failure cases
• ✅ RequireAnyPermission() - Multiple permission scenarios
• ✅ CanAccessUserResource() - Ownership validation

Permission Matrix Validation:

• ✅ ADMIN permissions (10/10 permissions)
• ✅ DEVELOPER permissions (6/10 permissions)
• ✅ VIEWER permissions (3/10 permissions)

Edge Cases:

• ✅ Nil user context handling
• ✅ Unknown role handling
• ✅ Resource ownership edge cases

Additional Notes

Test Structure

The test suite follows the existing testing patterns in the codebase:

• Uses github.com/stretchr/testify/assert for assertions
• Table-driven tests for comprehensive coverage
• Clear test names describing the scenario
• Tests organized by function/feature

Documentation Highlights

New Sections Added:

1. Authentication: Complete authentication flow documentation
2. Role-Based Access Control: RBAC system overview
3. Permission Matrix: Visual permission table
4. Resource Ownership: Rules for accessing user resources

Updated Sections:

1. API Endpoints: Now includes permission requirements
2. Data Model: Includes User table schema

Running Tests

Run all tests

go test ./...

Run RBAC tests specifically

go test ./layer/utils/... -v

Run with coverage

go test ./layer/utils/... -cover### Next Steps

Phase 1 is now complete! The standalone authentication system with RBAC is fully implemented, tested, and documented.

Future Enhancements (Phase 2+):

• Integration tests with actual DynamoDB
• End-to-end API tests
• Performance testing
• Security audit
• Group-based feature flags
• Service integration SDK

Files Changed

• layer/utils/RBAC_test.go (new - comprehensive RBAC tests)
• README.md (updated - authentication and RBAC documentation)

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Phase 1 Completion Summary:

1. ✅ Week 1: User service foundation
2. ✅ Week 2: Authentication migration
3. ✅ Week 3: Role-based access control
4. ✅ Week 4: Testing & documentation (this PR)

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