# User Resolution Tests Summary

## Overview
Created comprehensive unit tests for user resolution features in the Flow SDK, following best practices:
- Surgical testing - only test what's necessary
- Minimal mocking - use real objects where possible  
- 80/20 approach - focus on critical paths
- True to actual implementation behavior

## Test Coverage

### 1. User Resolution (`get_user()`)
Tests in `TestUserResolution` class:
- ✅ Successful user resolution from API
- ✅ Caching behavior (cache hit on subsequent calls)
- ✅ Cache expiry after TTL
- ✅ 404 handling (user not found)
- ✅ API error handling (500 errors)
- ✅ Missing fields handling (defaults to "unknown")

### 2. Instance Resolution (`get_task_instances()`)
Tests in `TestInstanceResolution` class:
- ✅ String instance IDs (triggers API fetch)
- ✅ Dict instance data (handles validation failures)
- ✅ Partial failure handling (some instances fail to fetch)
- ✅ Empty instances list

### 3. Task Model Integration
Tests in `TestTaskModelIntegration` class:
- ✅ `task.get_user()` method with caching
- ✅ Handling when `created_by` is None
- ✅ Handling when no provider is available
- ✅ Error handling (returns None on failure)
- ✅ `task.get_instances()` method
- ✅ `task.public_ip` property (returns IP if ssh_host is an IP)
- ✅ `task._is_ip_address()` helper method

### 4. Adapter Instance Conversion
Tests in `TestAdapterInstanceConversion` class:
- ✅ Basic FCP instance to domain Instance conversion
- ✅ Handling missing public_ip
- ✅ ssh_host priority over public_ip

## Key Implementation Details

1. **Provider Initialization**: Uses proper `Config` object with provider_config
2. **Task Creation**: Requires all mandatory fields (created_at, instance_type, etc.)
3. **Private Attributes**: Set `_provider` after Task creation
4. **Error Types**: Uses `FCPAPIError` for API errors, not raw `HTTPError`
5. **Actual Behavior**: Dict instances in bid cause validation failures (tested accurately)

## Running the Tests
```bash
python -m pytest tests/unit/test_user_resolution.py -v
```

All 21 tests pass successfully.