Comprehensive Unit Tests for PNodeData - 95 Tests Covering All Interfaces

[Copilot]

This PR implements a comprehensive test suite for PNodeData (OpNodeCore.BasicOpNode) that thoroughly tests data manipulation, attributes, and operations using the new interfaces. The test suite has grown from 31 to 95 tests, providing extensive coverage of all major functionality.

Key Improvements

Data Manipulation Testing (18 new tests)

• Property Testing: Comprehensive validation of Name, Value, and Tag properties with edge cases
• Name Validation: Thorough testing of IsValidName() method with valid/invalid XML characters
• XML Name Generation: Testing GetXmlName() method with GUID fallback for invalid names
• Constructor Variants: Full coverage of all BasicOpNode constructor overloads

Attributes Management Testing (23 new tests)

• CRUD Operations: Complete testing of Create, Read, Update, Delete operations for attributes
• Edge Cases: Handling of null, empty, and special character scenarios
• Search Functionality: Testing HasAttribute() and HasAttributeValue() methods
• Performance: Large-scale testing with 1000+ attributes
• Case Sensitivity: Verification of proper case-sensitive attribute handling

Operations Testing (14 new tests)

• Operation Management: Testing operation addition, execution, and clearing
• Error Handling: Proper exception handling for null operations
• Implementation Behavior: Verification of actual BasicOpNode operation behavior (clear-on-add)
• Sum Operation: Added helper class to test mathematical operations

Future-Ready Placeholder Tests (20 tests)

• XML Conversion: 7 placeholder tests for XML Document ↔ pNode conversion
• JSON Conversion: 7 placeholder tests for JSON ↔ pNode conversion
• Binary Data: 6 tests for binary data handling and Base64 encoding
• Cross-Format: Tests for XML ↔ JSON round-trip conversions

Exception and Error Handling (6 new tests)

• Invalid Names: Proper exception types for invalid element/tag names
• Null Handling: ArgumentException vs ArgumentNullException distinction
• Graceful Degradation: Handling of malformed data scenarios

Technical Details

The tests are organized into logical test classes:

• INodeDataTests: Core data manipulation functionality
• INodeAttributesTests: Attribute management and edge cases
• INodeOperationsTests: Operation execution and management
• XmlJsonConversionTests: Conversion placeholders ready for implementation
• BinaryDataTests: Binary data and Base64 handling
• ExceptionHandlingTests: Error scenarios and edge cases

All tests have been carefully adapted to match the actual implementation behavior of BasicOpNode, ensuring they accurately reflect the system's current functionality while providing a solid foundation for future enhancements.

The placeholder tests for XML/JSON conversion provide a clear roadmap for future implementation, with detailed comments explaining the expected behavior and integration points.

Fixes #71.

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Pull Request Overview

This PR introduces configuration management services for the pWord Windows Forms application and significantly enhances the Windows Forms testing infrastructure. The implementation provides automatic control configuration from app.config files and establishes a robust testing framework for Windows Forms components.

• Configuration Services: Implements automatic detection and configuration of Windows Forms controls using app.config settings
• Enhanced Windows Forms Testing: Converts placeholder tests to comprehensive functional tests with proper error handling and resource management
• Test Infrastructure: Adds configuration management, mock data creation, and comprehensive testing documentation

Reviewed Changes

Copilot reviewed 47 out of 166 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
pWord4/pWordLib/pWordLib.csproj	Adds System.Configuration reference and new configuration service files
pWord4/pWordLib/*.cs	Implements configuration services for automatic control setup from app.config
pWord4/pWord4/Test_WindowsForms/*.cs	Duplicates configuration services in test project and adds comprehensive Windows Forms tests
pWord4/pWord4/Test_WindowsForms/app.config	Provides configuration values for form controls
pWord4/pWord4/Test_WindowsForms/WindowsFormsTests.cs	Transforms placeholder tests into functional form creation and validation tests
pWord4/OpNodeCore/obj/* and pWord4/OpNodeCore.Tests/obj/*	Removes generated build artifacts

Comments suppressed due to low confidence (3)

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[Copilot]

Using Convert.ChangeType without proper type checking can cause runtime exceptions. Consider adding type compatibility checks or using safer conversion methods like TryParse for primitive types.

Suggested change

	property.SetValue(toolBar, convertedValue);
	var convertedValue = SafeConvert(value, property.PropertyType);
	if (convertedValue != null)
	property.SetValue(toolBar, convertedValue);

[Copilot]

Using reflection to invoke private methods makes the code fragile and hard to maintain. Consider testing event handling through public APIs or mocking frameworks instead.

Suggested change

	.Invoke(form, new object[] { EventArgs.Empty });
	// Simulate load event using public API
	form.CreateControl(); // This will fire the Load event

[Copilot]

Direct casting without type checking can cause InvalidCastException. Consider using safer conversion methods or adding type validation before casting.

Suggested change

	return value;
	var rawValue = _configReader.GetValue(key, typeof(T));
	if (rawValue is T typedValue)
	{
	_configCache[key] = typedValue;
	return typedValue;
	}
	else
	{
	// Try to convert if possible
	try
	{
	var convertedValue = (T)Convert.ChangeType(rawValue, typeof(T));
	_configCache[key] = convertedValue;
	return convertedValue;
	}
	catch
	{
	return defaultValue;
	}
	}

[Copilot]

The method creates a BMP file but the variable is named iconPath and expected to be an ICO file. This mismatch could cause issues when the file is used elsewhere expecting an actual icon format.

Suggested change

	bitmap.Save(iconPath.Replace(".ico", ".bmp"));
	// Save as icon (correct approach)
	using (var icon = Icon.FromHandle(bitmap.GetHicon()))
	using (var fs = new FileStream(iconPath, FileMode.Create))
	{
	icon.Save(fs);
	}

[marcnoon]

Looks good for initial effort. This move the epic forward so we can complete more steps in this epic