Elamur Groupantslatex-test-gate-stage0
The groupant beside latex/tests/gate.rs in the Mova repository: what the code computes, what it never does, how to go back from its outputs, its invariants, cost and checks.
Facts
Implementation material. A Mova code model describes this code at one source revision: partial models, finite checks and their stated scope. It is not a reviewed general exposition, and its labels are shown as written, never raised.
Components
| component | label | where |
|---|---|---|
| approximant | partial | approximant |
| ast | partial | ../syntax.json |
| composition | partial | composition |
| descriptant | present | descriptant |
| invariant | partial | invariant |
| tests | executed bounded checks | tests |
Obernants
The typed relations around the forward model: the behaviour complement (what the code never does), the reverse reconstruction (every input compatible with an output) and specialised views.
| id | type | label | where |
|---|---|---|---|
behavior_complement | behavior_complement | partial source derived model | behavior_complement |
reverse_reconstruction | reverse_reconstruction | partial source derived model | reverse_reconstruction |
quotient_oracle | quotient_oracle | partial source derived model | quotient_oracle |
finite_conjunction | finite_conjunction | partial source derived model | finite_conjunction |
Model text
descriptant
latex-test-gate-stage0
SUITE iterates fixed formula literals; ok requires parse success. For each tree, unknowns must be empty, gate::check must return Ok, and to_latex(parse(to_latex(tree))) must equal first print. Failures accumulate then one assert requires an empty list.
Epoch 2026-10-31: replaced stage topic lists with concrete transitions, exclusions and compatible antecedents. Four meaningful typed views replace the previous six-view bookkeeping catalog. Shared syntax and source byte bounds are unchanged.
approximant
Scoped forward relation
SUITE iterates fixed formula literals; ok requires parse success. For each tree, unknowns must be empty, gate::check must return Ok, and to_latex(parse(to_latex(tree))) must equal first print. Failures accumulate then one assert requires an empty list.
This is an exact source-derived partial model, not an executable approximate replacement.
invariant
Scoped invariants
The selected test cannot pass if any listed fixture fails parsing, retains unknowns, fails structural gate or changes canonical bytes on the second print. It does not reject a fault confined to unlisted inputs.
gate compares Node equality, which erases Span coordinates. The additional fixed-point assertion constrains printer stability but still does not validate original coordinates.
Success is conjunction over the fixed SUITE, not a random-sampling confidence interval or full TeX completeness theorem. No denominator beyond this suite is justified.
composition
Scoped interaction
Fixture test joins parse, unknown traversal, canonical printer and gate. It runs independently of the skipped random-token and document tests.
The manifest binds this stage to the unchanged parent syntax projection and exact source byte range. Parent cost remains an upper accounting context; no independent whole-file invocation or execution count is assigned to this fragment.
models
behavior_complement
The selected test cannot pass if any listed fixture fails parsing, retains unknowns, fails structural gate or changes canonical bytes on the second print. It does not reject a fault confined to unlisted inputs.
reverse_reconstruction
A passing transcript admits all implementations agreeing on this finite suite, including ones with arbitrary differences elsewhere. Span-only changes can pass structural gate; canonical-byte agreement does not reconstruct fixture whitespace/alias choices.
quotient_oracle
gate compares Node equality, which erases Span coordinates. The additional fixed-point assertion constrains printer stability but still does not validate original coordinates.
finite_conjunction
Success is conjunction over the fixed SUITE, not a random-sampling confidence interval or full TeX completeness theorem. No denominator beyond this suite is justified.
tests
Evidence — 2026-10-31
7 integration tests via --test gate with document and soup skipped
Selected library filters ast:: lex:: macros:: parse:: print:: table:: and integration gate excluding document_extraction_with_preamble_macros and random_token_soup_never_panics_and_roundtrips. Direct rustc --test latex/build.rs exercises private helpers. All selected tests twice debug/release with identical sorted names. Four compiled mutants at build/AST/parser/printer boundaries fail assertions then exact restoration passes. These do not individually cover every source. Build-main failure effects, allocation failures and universal roundtrip are unproved. Strict Clippy reports existing lints. No corpus/live VMM/API/GPU/full-school/held-out tests.
This page in Markdown → https://md.groupants.elamur.ai/free/en/mova/latex/tests/gate.rs.groupant/stage0.groupant/