## ADDED Requirements

### Requirement: Backend test project exists
The system SHALL have a dedicated .NET test project named `backend.Tests` that references the main `backend` project.

#### Scenario: Test project references main project
- **WHEN** the test project is built
- **THEN** it SHALL have a project reference to the main backend API project

### Requirement: Controllers can be unit tested
The system SHALL provide the ability to unit test API Controllers with mocked dependencies.

#### Scenario: Controller with mocked service
- **WHEN** a controller action is invoked with a mocked service
- **THEN** the test SHALL verify the correct HTTP response is returned

#### Scenario: Controller input validation
- **WHEN** invalid input is passed to a controller action
- **THEN** the test SHALL verify validation errors are returned

### Requirement: Services can be unit tested
The system SHALL provide the ability to unit test business logic in Services with mocked dependencies.

#### Scenario: Service with mocked repository
- **WHEN** a service method is called with a mocked data repository
- **THEN** the test SHALL verify the expected business logic is executed

### Requirement: Test utilities are available
The system SHALL provide common test utilities for setup, teardown, and assertions.

#### Scenario: Mock data factories
- **WHEN** tests require test data
- **THEN** factory classes SHALL generate consistent mock entities

#### Scenario: HTTP context mocking
- **WHEN** tests need to simulate HTTP requests
- **THEN** utilities SHALL provide mocked HttpContext and User claims
