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# SilverSight Testing Rules
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Testing is not an afterthought. Every module that claims a property must
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provide a way to witness that property — at minimum a `#eval` witness for Lean
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and a unit test for Python. This document defines the rules before the project
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outgrows them.
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---
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## 1. Philosophy
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- **A theorem without a witness is a draft.** Lean proofs are required for
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gates; `#eval` witnesses are required for computable claims.
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- **A shim without a unit test is untrusted.** Every Python module that
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performs I/O, parsing, or feature extraction must have matching unit tests.
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- **A receipt without a roundtrip is incomplete.** Any receipt format must be
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serializable, deserializable, and byte-identical on the roundtrip.
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- **A new term without a glossary entry is undocumented.** The glossary lint
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(`python3 .github/scripts/glossary_lint.py`) must stay green.
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---
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## 2. Lean tests
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### Location and naming
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```text
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formal/CoreFormalism/Foo.lean ← implementation
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formal/CoreFormalism/Foo/Test.lean ← Lean tests for Foo (when test count grows)
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tests/lean/FooTest.lean ← alternatively, a central tests/lean tree
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```
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For small modules, tests may live at the bottom of the implementation file as
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`#eval` witnesses. When a module exceeds ~500 lines or has more than five
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witnesses, split tests into a separate `Test.lean` file.
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### Required witnesses
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Every Lean module in the active build must include at least one of the
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following:
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1. **Type-correctness smoke test** — `#check` the main definition.
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2. **Computational witness** — `#eval` showing the definition produces the
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expected value on a concrete input.
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3. **Property witness** — a short `example` block proving a trivial but
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representative instance of the main theorem.
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4. **Roundtrip witness** — for any encoder/decoder pair, prove or `#eval`
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`decode (encode x) = x` on a concrete `x`.
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### Anti-patterns
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- Do not rely on `sorry` or `admit` in committed code. CI rejects them.
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- Do not put long-running `#eval` witnesses in files built by default unless they
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are necessary for the proof story.
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- Do not import test files into production modules.
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### Running Lean tests
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```bash
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# Build the whole formal library
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lake build SilverSightFormal
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# Build a specific module and its witnesses
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lake build CoreFormalism.FixedPoint
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# Check for sorries/admits in formal code
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rg "sorry|admit" formal/ Core/
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```
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---
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## 3. Python tests
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### Location and naming
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```text
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python/foo.py ← implementation
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tests/test_foo.py ← pytest unit tests
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qubo/bar.py ← implementation
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tests/test_bar.py ← pytest unit tests
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```
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Use the `tests/` directory for all Python tests. Mirror the module path when
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possible: `python/chaos_game.py` → `tests/test_chaos_game.py`.
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### Required tests
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Every Python module must have tests covering:
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1. **Happy path** — typical input produces expected output.
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2. **Boundary** — empty input, zero, maximum, or minimum values.
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3. **Error path** — malformed input raises the documented exception.
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4. **No-Float drift** — any function that returns a fixed-point value must
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roundtrip through the canonical Q16_16 representation without loss.
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### Example
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```python
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# tests/test_q16_canonical.py
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from python.q16_canonical import q16_from_float, q16_to_float
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def test_q16_roundtrip():
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for x in [0.0, 1.0, -1.0, 3.1415926535, -65535.999]:
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raw = q16_from_float(x)
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assert abs(q16_to_float(raw) - x) < 1.5e-5
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```
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### Running Python tests
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```bash
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pytest tests/ -v
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python3 -m py_compile python/*.py qubo/*.py
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```
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---
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## 4. Integration tests
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Integration tests live in `tests/integration/` and exercise end-to-end flows:
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- `test_receipt_roundtrip.py` — generate a receipt, serialize to JSON,
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deserialize, verify equality.
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- `test_chaos_to_q16.py` — run the chaos game, produce addresses, and assert
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they are valid Sidon labels.
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- `test_finsler_qubo.py` — build a Finsler metric, convert to QUBO, solve, and
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check that the returned path is feasible.
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Integration tests may be slow; CI runs them but they are allowed to be skipped
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locally with `pytest -m 'not slow'`.
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---
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## 5. Documentation tests
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Documentation is part of the contract and is tested:
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- **Glossary lint** — warns when a domain term appears repeatedly in docs but is
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not defined in `docs/GLOSSARY.md`.
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```bash
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python3 .github/scripts/glossary_lint.py
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```
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- **CFF validation** — `CITATION.cff` must remain valid YAML.
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```bash
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python3 -c "import yaml; yaml.safe_load(open('CITATION.cff'))"
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```
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- **Doc sync check** — README, PORTING_MAP, and AGENTS must mention every
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top-level directory.
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```bash
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python3 .github/scripts/check_doc_sync.py
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```
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---
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## 6. CI gates
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Every push and pull request must pass:
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1. `lake build` — default target builds.
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2. `lake build SilverSightFormal` — formal library builds.
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3. `pytest tests/ -v` — Python tests pass.
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4. `python3 -m py_compile` on touched `.py` files.
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5. `python3 .github/scripts/glossary_lint.py` — no undefined repeated terms.
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6. `python3 .github/scripts/check_doc_sync.py` — README matches tree.
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7. `rg "sorry|admit" formal/ Core/` — no committed placeholders.
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8. `python3 -c "import yaml; yaml.safe_load(open('CITATION.cff'))"` — CFF valid.
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---
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## 7. Test-driven porting checklist
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When porting a Research Stack module to SilverSight:
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- [ ] Module builds (`lake build CoreFormalism.X`).
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- [ ] No `sorry` or `admit` in the ported surface.
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- [ ] At least one `#eval` witness or `example` block added.
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- [ ] Python shim (if any) has a matching unit test.
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- [ ] New terms added to `docs/GLOSSARY.md` or `docs/GLOSSARY_ALLOWLIST.md`.
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- [ ] `PORTING_MAP.md` status updated.
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- [ ] `AGENTS.md` updated if boundaries changed.
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