Test Suite Generator

Generate a comprehensive test suite for {{file_or_module_path}}.

Testing framework: {{test_framework}}
Current test coverage: {{current_coverage}} (or "none")

Requirements:
1. **Unit tests** for every exported function/method:
   - Happy path with realistic data
   - Edge cases: empty inputs, nulls, boundary values, maximum sizes
   - Error cases: invalid inputs, network failures, timeout scenarios
2. **Integration tests** for interactions between components:
   - Mock external dependencies ({{external_deps}})
   - Test the actual integration between internal modules
3. **Test organization**:
   - Group with describe blocks by function/feature
   - Each test name should read as a sentence: "should return empty array when no items match filter"
   - Setup/teardown in beforeEach/afterEach — no test interdependencies

Additional:
- Use {{assertion_style}} assertion style
- Generate test fixtures as constants at the top of the file, not inline
- Add a comment "// Edge case" before non-obvious test scenarios
- Aim for >90% branch coverage

Do NOT test implementation details — test behavior and outputs.