Update copilot instructions to use new pytest testing framework

Co-authored-by: theUpsider <25013640+theUpsider@users.noreply.github.com>

.github/copilot-instructions.md

@@ -11,6 +11,8 @@ Always reference these instructions first and fallback to search or bash command
 - **`__init__.py`** - Module initialization that imports the main class
 - **`pyproject.toml`** - Project metadata for Comfy Registry publishing
 - **`README.md`** - User documentation
+- **`run_tests.py`** - Test runner script using pytest framework
+- **`tests/`** - Comprehensive test suite with fixtures and unit tests
 - **`.github/workflows/publish.yml`** - Automated publishing to Comfy Registry
 
 ### Prerequisites and Dependencies
@@ -21,45 +23,33 @@ Always reference these instructions first and fallback to search or bash command
 
 ### Development Workflow
 - **No build process required** - This is a pure Python plugin that loads directly into ComfyUI
-- **No automated tests exist** - Validation is done through manual testing and syntax checking
+- **Automated testing framework** - Uses pytest with comprehensive test coverage
 - **No linting configuration** - Follow Python PEP 8 standards manually
 - Always validate Python syntax after making changes: `python3 -c "import ast; ast.parse(open('styles_csv_loader.py').read())"`
 - Always validate init file syntax: `python3 -c "import ast; ast.parse(open('__init__.py').read())"`
 
 ### Testing and Validation
-- **CSV Parsing Testing**: Create test CSV files and validate parsing logic standalone:
+- **Run the test suite**: Use the automated testing framework for comprehensive validation:
   ```bash
-  # Create test CSV in /tmp
-  echo 'style_name,positive_prompt,negative_prompt
-  cinematic,cinematic lighting professional photography,low quality blurry
-  vintage,"old photo sepia tone, vintage style",modern digital' > /tmp/test_styles.csv
+  # Run all tests
+  python run_tests.py
   
-  # Test parsing logic (takes <5 seconds)
-  python3 -c "
-  import os, re
-  def load_styles_csv(path):
-      with open(path, 'r', encoding='utf-8') as f:
-          styles = [[x.replace('\"', '').replace('\n', '') for x in re.split(',(?=(?:[^\"]*\"[^\"]*\")*[^\"]*$)', line)] for line in f.readlines()[1:]]
-          return {x[0]: [x[1], x[2]] for x in styles}
-  result = load_styles_csv('/tmp/test_styles.csv')
-  print(f'Loaded {len(result)} styles successfully')
-  "
+  # Run tests with coverage reporting
+  python run_tests.py --coverage
   ```
 
+- **Test Structure**: The test suite includes:
+  - Unit tests for CSV parsing logic
+  - Tests for various CSV formats (valid, invalid, complex)
+  - Integration tests for ComfyUI node functionality
+  - Test fixtures with sample CSV files
+
 - **Syntax Validation**: Always run before committing changes:
   ```bash
   python3 -c "import ast; ast.parse(open('styles_csv_loader.py').read()); print('styles_csv_loader.py syntax valid')"
   python3 -c "import ast; ast.parse(open('__init__.py').read()); print('__init__.py syntax valid')"
   ```
 
-- **Full Integration Testing**: Requires ComfyUI environment:
-  1. Install ComfyUI
-  2. Copy this extension to `ComfyUI/custom_nodes/ComfyUI-Styles_CSV_Loader/`
-  3. Create a test `styles.csv` in ComfyUI root directory
-  4. Restart ComfyUI
-  5. Verify "Load Styles CSV" node appears in loaders category
-  6. Test loading different styles and verify positive/negative prompts output correctly
-
 ### CSV File Format Requirements
 - Must be named `styles.csv` and located in ComfyUI root directory (where `main.py` is)
 - Format: `style_name,positive_prompt,negative_prompt`
@@ -77,7 +67,7 @@ Always reference these instructions first and fallback to search or bash command
 ### Making Code Changes
 1. Edit `styles_csv_loader.py` for core functionality changes
 2. Run syntax validation: `python3 -c "import ast; ast.parse(open('styles_csv_loader.py').read())"`
-3. Test CSV parsing with sample data (see Testing section above)
+3. Run the test suite to validate changes: `python run_tests.py`
 4. If changing module structure, also validate `__init__.py`
 
 ### Adding New Features
@@ -90,8 +80,8 @@ Always reference these instructions first and fallback to search or bash command
   - `CATEGORY` for node organization
 
 ### Debugging CSV Issues
-- Check that `styles.csv` exists in ComfyUI root directory
-- Validate CSV format with test parsing script
+- Run the test suite to identify issues: `python run_tests.py`
+- Check test fixtures in `tests/fixtures/` for valid CSV examples
 - Common issues:
   - Unescaped quotes in CSV fields
   - Wrong number of columns
@@ -116,7 +106,15 @@ Always reference these instructions first and fallback to search or bash command
 ├── README.md
 ├── __init__.py
 ├── pyproject.toml
-└── styles_csv_loader.py
+├── run_tests.py
+├── styles_csv_loader.py
+└── tests/
+    ├── __init__.py
+    ├── fixtures/
+    │   ├── complex_styles.csv
+    │   ├── invalid_styles.csv
+    │   └── valid_styles.csv
+    └── test_styles_csv_loader.py
 ```
 
 ### Key Code Patterns
@@ -133,7 +131,7 @@ Always reference these instructions first and fallback to search or bash command
 ## Validation Checklist
 Before committing any changes:
 - [ ] Run Python syntax validation on all modified .py files
-- [ ] Test CSV parsing with sample data
+- [ ] Run the test suite: `python run_tests.py`
 - [ ] Verify no new dependencies introduced
 - [ ] Update version in pyproject.toml if needed
-- [ ] Test in actual ComfyUI environment if possible
+- [ ] Ensure all tests pass