Improve unit test coverage

[robbrad]

🧪 Add Comprehensive Test Suite and Improve Tool Functionality

Overview

This PR significantly enhances the Strands Agents Tools project by adding extensive test coverage and improving core tool functionality. The changes include 13,068 insertions across 35 files, representing a bump from 75% to 86% coverage.

🎯 Key Improvements

📋 Testing Infrastructure

• Added pytest configuration (pytest.ini) with optimized test settings
• Enhanced project configuration (pyproject.toml) with updated dependencies and test requirements
• Comprehensive test utilities with improved mocking and isolation capabilities
• Test isolation framework to prevent hanging tests and ensure reliable execution

🔧 Tool Enhancements

• Python REPL Tool: Improved error handling and execution reliability
• Workflow Tool: Enhanced stability and better resource management
• Browser Tool: Expanded functionality with comprehensive action handlers
• Core utilities: Better user input handling and data processing

🧪 Test Coverage Expansion

New Comprehensive Test Suites:

• Browser Tests (test_browser_.py): Complete coverage of browser automation functionality
• Workflow Tests (test_workflow_.py): Multiple test scenarios from minimal to comprehensive
• Python REPL Tests (test_python_repl_comprehensive.py): Extensive testing of code execution
• User Input Tests (test_user_input_comprehensive.py): Thorough async/sync input handling
• Utility Tests: Enhanced coverage for AWS utilities, data handling, and model operations

Test Categories Added:

• Unit Tests: Individual component testing
• Integration Tests: Cross-component functionality
• Edge Case Tests: Boundary conditions and error scenarios
• Isolation Tests: Thread-safe and resource-safe testing

📊 Statistics

• 35 files changed
• 13,068 lines added
• 76 lines removed
• 16 new test files created
• 19 existing files enhanced

🔍 Technical Details

New Test Files:

• tests/browser/test_browser_action_handlers.py - Browser action testing
• tests/browser/test_browser_comprehensive.py - Complete browser functionality
• tests/test_python_repl_comprehensive.py - Python execution testing
• tests/test_workflow_comprehensive.py - Workflow management testing
• tests/utils/test_user_input_comprehensive.py - User input handling
• tests/workflow_test_isolation.py - Test isolation utilities

Enhanced Files:

• src/strands_tools/python_repl.py - Improved error handling
• src/strands_tools/workflow.py - Better resource management
• tests/conftest.py - Enhanced test configuration
• Multiple existing test files with expanded coverage

🛡️ Quality Improvements

• Thread Safety: Added proper mocking for threading components
• Resource Management: Better cleanup and isolation in tests
• Error Handling: Comprehensive exception testing and recovery
• Async Support: Full testing of asynchronous operations
• Cross-Platform: Improved compatibility across different environments

🚀 Benefits

• Increased Reliability: Comprehensive test coverage ensures stable functionality
• Better Developer Experience: Clear test structure and utilities
• Faster Development: Isolated tests prevent hanging and speed up CI/CD
• Quality Assurance: Edge cases and error conditions are thoroughly tested
• Maintainability: Well-structured test suite makes future changes safer

🔧 Configuration Updates

• pytest.ini: Optimized test discovery and execution settings
• pyproject.toml: Updated dependencies and development requirements
• .gitignore: Added test-related ignore patterns

🧪 Testing

All new tests pass successfully and provide comprehensive coverage of:
• Core tool functionality
• Error handling and edge cases
• Async/sync operations
• Threading and concurrency
• Resource management
• Cross-platform compatibility

This PR establishes a solid foundation for continued development with confidence in code quality and reliability.