# Provider Architecture Refactoring - Test Suite Summary

This document summarizes the complete test suite designed for the Provider architecture refactoring.

## Test File Structure

```
pkg/
├── config/
│   ├── model_config_test.go      # US-001, US-002: ModelConfig struct and GetModelConfig tests
│   └── migration_test.go         # US-003: Backward compatibility and migration tests
├── providers/
│   ├── factory_test.go           # US-004, US-005: Provider factory tests
│   └── factory_provider_test.go  # Factory provider integration tests
```

---

## Test Case Checklist

### 1. `pkg/config/model_config_test.go` - Configuration Parsing Tests

| Test Name | Purpose | PRD Reference |
|-----------|---------|---------------|
| `TestModelConfig_Parsing` | Verify ModelConfig JSON parsing | US-001 |
| `TestModelConfig_ModelListInConfig` | Verify model_list parsing in Config | US-001 |
| `TestModelConfig_Validation` | Verify required field validation | US-001 |
| `TestConfig_GetModelConfig_Found` | Verify GetModelConfig finds model | US-002 |
| `TestConfig_GetModelConfig_NotFound` | Verify GetModelConfig returns error | US-002 |
| `TestConfig_GetModelConfig_EmptyModelList` | Verify empty model_list handling | US-002 |
| `TestConfig_BackwardCompatibility_ProvidersToModelList` | Verify old config conversion | US-003 |
| `TestConfig_DeprecationWarning` | Verify deprecation warning | US-003 |
| `TestModelConfig_ProtocolExtraction` | Verify protocol prefix extraction | US-004 |
| `TestConfig_ModelNameUniqueness` | Verify model_name uniqueness | US-001 |

### 2. `pkg/config/migration_test.go` - Migration Tests

| Test Name | Purpose | PRD Reference |
|-----------|---------|---------------|
| `TestConvertProvidersToModelList_OpenAI` | OpenAI config conversion | US-003 |
| `TestConvertProvidersToModelList_Anthropic` | Anthropic config conversion | US-003 |
| `TestConvertProvidersToModelList_MultipleProviders` | Multiple provider conversion | US-003 |
| `TestConvertProvidersToModelList_EmptyProviders` | Empty providers handling | US-003 |
| `TestConvertProvidersToModelList_GitHubCopilot` | GitHub Copilot conversion | US-003 |
| `TestConvertProvidersToModelList_Antigravity` | Antigravity conversion | US-003 |
| `TestGenerateModelName_*` | Model name generation | US-003 |
| `TestHasProvidersConfig_*` | Detect old config existence | US-003 |
| `TestValidateMigration_*` | Migration validation | US-003 |
| `TestMigrateConfig_DryRun` | Dry run migration | US-003 |
| `TestMigrateConfig_Actual` | Actual migration | US-003 |

### 3. `pkg/providers/registry_test.go` - Load Balancing Tests

| Test Name | Purpose | PRD Reference |
|-----------|---------|---------------|
| `TestModelRegistry_SingleConfig` | Single config returns same result | US-006 |
| `TestModelRegistry_RoundRobinSelection` | 3-config round-robin selection | US-006 |
| `TestModelRegistry_RoundRobinTwoConfigs` | 2-config round-robin selection | US-006 |
| `TestModelRegistry_ConcurrentAccess` | Concurrent access thread safety | US-006 |
| `TestModelRegistry_RaceDetection` | Data race detection | US-006 |
| `TestModelRegistry_ModelNotFound` | Model not found error | US-006 |
| `TestModelRegistry_EmptyRegistry` | Empty registry handling | US-006 |
| `TestModelRegistry_MultipleModels` | Multiple model registration | US-006 |
| `TestModelRegistry_MixedSingleAndMultiple` | Single/multiple config mix | US-006 |
| `TestModelRegistry_CaseSensitiveModelNames` | Case sensitivity | US-006 |

### 4. `pkg/providers/factory/factory_test.go` - Provider Factory Tests

| Test Name | Purpose | PRD Reference |
|-----------|---------|---------------|
| `TestCreateProviderFromConfig_OpenAI` | Create OpenAI provider | US-004 |
| `TestCreateProviderFromConfig_OpenAIDefault` | Default openai protocol | US-004 |
| `TestCreateProviderFromConfig_Anthropic` | Create Anthropic provider | US-004 |
| `TestCreateProviderFromConfig_Antigravity` | Create Antigravity provider | US-004 |
| `TestCreateProviderFromConfig_ClaudeCLI` | Create Claude CLI provider | US-004 |
| `TestCreateProviderFromConfig_CodexCLI` | Create Codex CLI provider | US-004 |
| `TestCreateProviderFromConfig_GitHubCopilot` | Create GitHub Copilot provider | US-004 |
| `TestCreateProviderFromConfig_UnknownProtocol` | Unknown protocol error handling | US-004 |
| `TestCreateProviderFromConfig_MissingAPIKey` | Missing API key error | US-004 |
| `TestExtractProtocol` | Protocol prefix extraction | US-004 |
| `TestCreateProvider_UsesModelList` | Create using model_list | US-005 |
| `TestCreateProvider_FallbackToProviders` | Fallback to providers | US-005 |
| `TestCreateProvider_PriorityModelListOverProviders` | model_list priority | US-005 |

### 5. `pkg/providers/integration_test.go` - E2E Integration Tests

| Test Name | Purpose | PRD Reference |
|-----------|---------|---------------|
| `TestE2E_OpenAICompatibleProvider_NoCodeChange` | Zero-code provider addition | Goal |
| `TestE2E_LoadBalancing_RoundRobin` | Load balancing actual effect | US-006 |
| `TestE2E_BackwardCompatibility_OldProvidersConfig` | Old config compatibility | US-003 |
| `TestE2E_ErrorHandling_ModelNotFound` | Model not found | FR-30 |
| `TestE2E_ErrorHandling_MissingAPIKey` | Missing API key | FR-31 |
| `TestE2E_ErrorHandling_InvalidAPIBase` | Invalid API base | FR-30 |
| `TestE2E_ToolCalls_OpenAICompatible` | Tool call support | - |
| `TestE2E_AntigravityProvider` | Antigravity provider | US-004 |
| `TestE2E_ClaudeCLIProvider` | Claude CLI provider | US-004 |

### 6. Performance Tests

| Test Name | Purpose |
|-----------|---------|
| `BenchmarkCreateProviderFromConfig` | Provider creation performance |
| `BenchmarkGetModelConfig` | Model lookup performance |
| `BenchmarkGetModelConfigParallel` | Concurrent lookup performance |

---

## Running Tests

```bash
# Run all tests
go test ./pkg/... -v

# Run with data race detection
go test ./pkg/... -race

# Run specific package tests
go test ./pkg/config -v
go test ./pkg/providers -v

# Run E2E tests
go test ./pkg/providers -run TestE2E -v

# Run performance tests
go test ./pkg/providers -bench=. -benchmem
```

---

## PRD Acceptance Criteria Mapping

| PRD Acceptance Criteria | Test Cases |
|------------------------|------------|
| US-001: Add ModelConfig struct | `TestModelConfig_Parsing`, `TestModelConfig_Validation` |
| US-001: model_name unique | `TestConfig_ModelNameUniqueness` |
| US-002: GetModelConfig method | `TestConfig_GetModelConfig_*` |
| US-003: Auto-convert providers | `TestConvertProvidersToModelList_*` |
| US-003: Deprecation warning | `TestConfig_DeprecationWarning` |
| US-003: Existing tests pass | (existing test files unchanged) |
| US-004: Protocol prefix factory | `TestExtractProtocol`, `TestCreateProviderFromConfig_*` |
| US-004: Default prefix openai | `TestCreateProviderFromConfig_OpenAIDefault` |
| US-005: CreateProvider uses factory | `TestCreateProvider_*` |
| US-006: Round-robin selection | `TestModelRegistry_RoundRobin*` |
| US-006: Thread-safe atomic | `TestModelRegistry_RaceDetection` |

---

## Recommended Implementation Order

1. **Phase 1: Configuration Structure** (US-001, US-002)
   - Implement `ModelConfig` struct
   - Implement `GetModelConfig` method
   - Run `model_config_test.go`

2. **Phase 2: Protocol Factory** (US-004)
   - Implement `CreateProviderFromConfig`
   - Implement `ExtractProtocol`
   - Run `factory_test.go`

3. **Phase 3: Load Balancing** (US-006)
   - Implement `ModelRegistry`
   - Implement round-robin selection
   - Run `registry_test.go` (with `-race`)

4. **Phase 4: Backward Compatibility** (US-003, US-005)
   - Implement `ConvertProvidersToModelList`
   - Refactor `CreateProvider`
   - Run `migration_test.go`
   - Verify existing tests pass

5. **Phase 5: E2E Verification**
   - Run `integration_test.go`
   - Manual testing with `config.example.json`
