Tests

Test Suites

test_integration.py

Tests core diffchunk functionality with real diff files:

• Loading and parsing diffs
• Chunking and navigation
• Filtering options
• Error handling

test_mcp_components.py

Tests MCP server components and tools:

• Complete workflow testing
• Input validation
• Server creation and registration
• Performance with large diffs

Test Data

Real diff files from open-source projects in test_data/:

File	Source	Size	Description
go_version_upgrade_1.22_to_1.23.diff	golang/go	~13MB	Go 1.22→1.23 upgrade (large diff testing)
dotnet_core_8_to_9.diff	dotnet/core	~12MB	.NET Core 8→9 upgrade (C# ecosystem)
react_18.0_to_18.3.diff	facebook/react	~2.1MB	React 18.0→18.3 updates (JS/JSX files)

Generated with:

git diff go1.22.0..go1.23.0 > go_version_upgrade_1.22_to_1.23.diff
git diff v8.0.0..v9.0.0 > dotnet_core_8_to_9.diff  
git diff v18.0.0..v18.3.0 > react_18.0_to_18.3.diff

Running Tests

# All tests
uv run pytest

# Specific suite
uv run pytest tests/test_integration.py -v
uv run pytest tests/test_mcp_components.py -v

# Single test
uv run pytest tests/test_mcp_components.py::TestMCPComponents::test_diffchunk_tools_complete_workflow -v