docs: migrate README to API-Doc-Convention (S2-cascade.libs test-lib)
Restructured per ADR-0038 with Coverage-Statement-Block per Fault- Injection-Audit-Convention. Topology auto-populated. Pre-commit hook installed. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Axel Meyer
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README.md
119
README.md
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# sporel-module-lib-core.selection-test
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# lib-core.selection-test
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P.3.6 reference test-module — validates `lib-core.selection` API contracts
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via the `engine.test.*` assertion surface.
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Test-lib for `lib-core.selection` (Tests-as-Libs per ADR-0037).
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- Module-ID: `lib-core.selection-test`
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- Version: `0.1.0`
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- Kind: `test-module` (headless; runs init() once + exits)
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- Spec: `meta/docs/superpowers/specs/2026-05-14-p3-6-lib-selection-design.md`
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**Version:** 0.1.0
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**Lib-ID:** lib-core.selection-test
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**Requires:** lib-core.selection v>=0.1.0, lib-core.input v>=0.4.0, lib-core.camera v>=0.3.0
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**Tags:** test, selection
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## Run
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## Topology
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<!-- topology:start (auto-generated; do not edit) -->
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```mermaid
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graph LR
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this["lib-core.selection-test"]
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lib_core_selection["lib-core.selection"]
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this --> lib_core_selection
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lib_core_input["lib-core.input"]
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this --> lib_core_input
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lib_core_camera["lib-core.camera"]
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this --> lib_core_camera
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```
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<!-- topology:end -->
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## Coverage Statement
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Per Fault-Injection-Audit-Convention (2026-05-16):
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| Section | Assertion-Count | Coverage |
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|---|---|---|
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| Register / Unregister | 3 | Handle positivity, `count_registered` after register/unregister |
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| Set-Query (initial empty) | 2 | `is_empty()` true, `count() == 0` |
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| Set-Mutation | 5 | `add`/`contains`, `count==1`, `remove`/`!contains`, `toggle` add/remove, `clear` -> empty |
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| Unregister cascade | 1 | `unregister` removes from selection |
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| Drag-Threshold | 2 | Default = 4, `set_drag_threshold` writes |
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| Drag-State + box_rect | 2 | Initial `drag_state == "idle"`, `box_rect()` nil while idle |
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| Enabled-Flag | 2 | Default true, `set_enabled(false)` writes |
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| Visual-Setters | 2 | `set_drag_box_color` writes RGBA, `set_highlight_color` writes RGBA |
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| Error-Handling | 3 | `set_drag_threshold(-1)` errors, `add(unregistered)` errors, `toggle(unregistered)` errors |
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| **TOTAL** | **22** | |
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### Tested-Surface
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- `selection.register`, `selection.unregister`, `selection.count_registered`
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- `selection.is_empty`, `selection.count`, `selection.contains`
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- `selection.add`, `selection.remove`, `selection.toggle`, `selection.clear`
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- `selection.drag_threshold`, `selection.set_drag_threshold`
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- `selection.drag_state`, `selection.box_rect`
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- `selection.enabled`, `selection.set_enabled`
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- `selection.set_drag_box_color`, `selection.drag_box_color`
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- `selection.set_highlight_color`, `selection.highlight_color`
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### Fault-Injection Audit (2026-05-16)
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Verified via deliberate-mutation in fixture-mirror; mutations reverted after observation.
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#### Caught Mutations
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| # | Mutation | Caught by |
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|---|---|---|
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| M1 | `M.contains` prefixed with `do return false end` (always false) | Assertions `add → contains` + `toggle adds when absent` fail (2 failures) |
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| M2 | `M.count` prefixed with `do return 0 end` (always zero) | Assertion `count = 1 after add` fails (expected 1, got 0) |
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#### Uncaught Mutations (Gaps) — Cheap-Fill Applied
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| # | Original Gap | Fill | Re-Inject Verifies |
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|---|---|---|---|
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| M3 | `M.add` unregistered-handle guard removed | Added `pcall(add(99999))` + `pcall(toggle(99999))` error assertions | ✓ |
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### Structurally Untestable
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- Mouse-drag selection-box interaction — requires real mouse events; headless `drag_state` stays `idle`.
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- Render output of highlight + drag-box visuals (verified manually).
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### Deferred
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- Integration test with simulated mouse events (Future-Slice B).
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## Running
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Via `--test-libs=lib-core.selection-test` (Smoke P0-S-batch Stage):
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```bash
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Sporel.exe --test-libs=lib-core.selection-test
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Sporel.exe --libs-dir=<libs-path> --test-libs=lib-core.selection-test
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```
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Output is TAP version 13 on stdout; exit-code = failure-count (0 = all pass).
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## Coverage Statements (2026-05-16 Fault-Injection Audit)
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## References
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Verified via deliberate-mutation in fixture-mirror; mutations reverted after observation.
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### Caught Mutations
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| # | Mutation | Caught by |
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|---|---|---|
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| M1 | `M.contains` prefixed with `do return false end` (always false) | Assertions "add → contains" (ok 6) and "toggle adds when absent" (ok 9) — 2 failures |
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| M2 | `M.count` prefixed with `do return 0 end` (always zero) | Assertion "count = 1 after add" (ok 7) — expected 1 got 0 |
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### Uncaught Mutations (Gaps)
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| # | Mutation | Why uncaught | Severity |
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|---|---|---|---|
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| M3 | `M.add` unregistered-handle guard removed (any handle accepted silently) | No test calls `add(unregistered_handle)` and expects an error | Medium |
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**Resolution per Gap:**
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- Gap M3: Cheap-fill applied — two `pcall` error assertions added for `add(99999)` and `toggle(99999)` (commit see below).
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### Cheap-Gap-Fills Applied
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| Gap | New Assertion | Re-Inject Verifies |
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|---|---|---|
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| M3 | `add(unregistered) errors` — `pcall(function() selection.add(99999) end)` must return false | ✓ |
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| M3 | `toggle(unregistered) errors` — `pcall(function() selection.toggle(99999) end)` must return false | ✓ |
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### Tested Production-Lib Surface
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`lib-core.selection` v0.1.0 — Tests cover: `register`, `unregister`, `count_registered`, `is_empty`, `count`, `contains`, `add`, `remove`, `toggle`, `clear`, `drag_threshold`, `set_drag_threshold`, `drag_state`, `box_rect`, `enabled`, `set_enabled`, `set_drag_box_color`, `drag_box_color`, `set_highlight_color`, `highlight_color`.
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- ADR-0037 (Tests-as-Libs Convention)
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- ADR-0038 (API-Doc-Convention)
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- Production-Lib: `~/Projects/Sporel/sporel-libs/lib-core/selection/README.md`
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- Spec: `meta/docs/superpowers/specs/2026-05-14-p3-6-lib-selection-design.md`
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