buster/packages/server-shared/TEST_SUMMARY.md

Server-Shared Package - Comprehensive Unit Tests Summary

Overview

I have successfully created comprehensive unit tests for every single file in the packages/server-shared folder. All tests are now passing with 115 total tests across 7 test files.

Test Coverage Summary

🎯 Files Tested

• ✅ src/index.ts - Main entry point exports
• ✅ src/chats/index.ts - Chat module exports
• ✅ src/chats/chat.types.ts - Chat type schemas
• ✅ src/chats/chat-errors.types.ts - Error handling types
• ✅ src/chats/chat-message.types.ts - Message type schemas
• ✅ src/currency/index.ts - Currency module exports
• ✅ src/currency/currency.types.ts - Currency type schemas

📊 Test Statistics

• Test Files: 7 passed (7)
• Total Tests: 115 passed (115)
• Duration: 428ms
• Pass Rate: 100% ✅

Detailed Test Coverage

1. Chat Types (chat.types.test.ts) - 27 tests

Comprehensive testing of chat-related Zod schemas:

• ✅ AssetPermissionRoleSchema validation (enum values: viewer, editor, owner)
• ✅ BusterShareIndividualSchema validation (email, role, optional name)
• ✅ ChatWithMessagesSchema validation (complex nested objects)
• ✅ ChatCreateRequestSchema validation (request validation with refinements)
• ✅ ChatCreateHandlerRequestSchema validation (internal handler requests)

Key Test Cases:

• Valid enum values and rejection of invalid ones
• Email validation and required field validation
• Complex nested object validation with optional fields
• UUID format validation
• Schema refinement rules (asset_id requires asset_type)
• Type inference verification

2. Chat Errors (chat-errors.types.test.ts) - 22 tests

Complete testing of error handling system:

• ✅ ChatErrorCode constant validation (10 error codes)
• ✅ ChatErrorResponseSchema validation
• ✅ ChatError class functionality

Key Test Cases:

• All error code constants exist and have correct values
• Error response schema validation with and without details
• ChatError class constructor, methods, and inheritance
• Error serialization with toResponse() method
• Custom status codes and error details handling
• Schema compatibility between ChatError output and response schema

3. Chat Messages (chat-message.types.test.ts) - 28 tests

Extensive testing of complex discriminated union schemas:

• ✅ ResponseMessageSchema (discriminated union: text vs file)
• ✅ ReasoningMessageSchema (discriminated union: text vs files vs pills)
• ✅ ChatMessageSchema (complete message structure)

Key Test Cases:

• Text response messages with optional fields
• File response messages with all file types (metric, dashboard, reasoning)
• File metadata and version handling
• Text reasoning messages with status validation
• Files reasoning messages with nested file objects
• Pills reasoning messages with pill containers and types
• Complex nested chat message validation
• Discriminated union type validation
• Status enum validation (loading, completed, failed)
• All file and pill type enums

4. Currency Types (currency.types.test.ts) - 14 tests

Thorough testing of simple schema:

• ✅ CurrencySchema validation and edge cases

Key Test Cases:

• Valid currency objects (code, description, flag)
• Multiple real-world currency examples
• Empty string handling
• Long descriptions and special characters
• Unicode character support (Arabic, Chinese, complex emojis)
• Missing field validation
• Non-string value rejection
• Extra property handling (schema stripping)
• SafeParse functionality for error handling

5. Index Files (index.test.ts, chats/index.test.ts, currency/index.test.ts) - 24 tests

Export verification and integration testing:

• ✅ Main package exports work correctly
• ✅ Chat module exports work correctly
• ✅ Currency module exports work correctly

Key Test Cases:

• All expected schemas are exported and functional
• Schema validation works through exports
• Type inference works correctly
• Export isolation (currency not in main index)
• Integration testing of exported functionality

🔧 Testing Infrastructure Setup

Dependencies Added

• ✅ Added vitest and @buster/vitest-config to devDependencies
• ✅ Added test scripts to package.json (test, test:watch)
• ✅ Created vitest.config.ts using workspace base configuration

Test File Organization

• ✅ Co-located tests with source files (.test.ts alongside .ts)
• ✅ Follows project testing conventions
• ✅ Uses vitest framework as specified in project rules

🧪 Test Quality Features

Comprehensive Validation Testing

• Schema Defaults: Tested optional fields and default behavior
• Edge Cases: Empty strings, null values, undefined, special characters
• Type Safety: Verified TypeScript type inference works correctly
• Error Scenarios: Invalid inputs, missing fields, wrong types
• Real-World Data: Used realistic examples (currencies, UUIDs, etc.)

Advanced Schema Testing

• Discriminated Unions: Thoroughly tested complex type discrimination
• Nested Objects: Deep validation of complex object structures
• Array Validation: Tested array fields with various lengths and contents
• Enum Validation: Tested all enum values and rejection of invalid ones
• Custom Validation: Tested Zod refinements and custom rules

Integration Testing

• Export Verification: Ensured all modules export correctly
• Cross-Module: Tested schemas work across module boundaries
• Type Inference: Verified TypeScript types work as expected

🚀 Benefits Achieved

1. 100% File Coverage: Every TypeScript file in the package has corresponding tests
2. Schema Validation: Comprehensive testing of all Zod schemas ensures data integrity
3. Type Safety: Verified TypeScript integration and type inference
4. Error Handling: Complete coverage of error scenarios and edge cases
5. Real-World Testing: Used realistic data examples and use cases
6. Maintenance: Tests will catch breaking changes and regressions
7. Documentation: Tests serve as living examples of how to use the schemas

🎯 Conclusion

The packages/server-shared package now has comprehensive, battle-tested unit tests covering every schema, type, and function. With 115 passing tests, this provides excellent confidence in the reliability and correctness of the shared type definitions used across the Buster application.

The tests follow best practices including:

• ✅ Co-located test files
• ✅ Descriptive test names and organization
• ✅ Edge case coverage
• ✅ Type inference verification
• ✅ Real-world example usage
• ✅ Error scenario testing

All tests pass successfully! 🎉