Cline rules

1# Testing Standards
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3## Test Structure
4- Unit tests in `tests/unit/`
5- Integration tests in `tests/integration/`
6- Shared fixtures in `tests/conftest.py` (CENTRAL LOCATION - DO NOT DUPLICATE)
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8## Test Guidelines
9- Mock external dependencies
10- Keep tests focused, deterministic, and fast
11- Cover main paths and exception handling
12- Use hypothesis for property-based tests when valuable
13- Integration tests cover edge cases
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15## Fixture Management
16- Use `tests/conftest.py` as the CENTRAL fixture location
17- DO NOT duplicate fixtures across test files
18- Define shared fixtures once in conftest.py
19- Use fixture scopes appropriately (function, class, module, session)
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21## Test Organization
22- Name test files with `test_` prefix
23- Name test functions with `test_` prefix
24- Group related tests in classes when appropriate
25- Keep test functions small and focused
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