---
title: "gparse-test-empty-sentences-bounded-check — Mova code model"
description: "Mova code model of gparse/tests/empty_sentences.rs: components with their labels, obernants and the model text."
url: "https://groupants.elamur.ai/free/en/mova/gparse/tests/empty_sentences.rs.groupant/bounded-check.groupant/"
---
Elamur: [Mova](https://md.mova.elamur.ai/free/en/) · [Dictionary](https://md.dictionary.elamur.ai/free/en/) · [Research](https://md.research.elamur.ai/free/en/) · **Groupants**

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# gparse-test-empty-sentences-bounded-check

The groupant beside gparse/tests/empty_sentences.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

- **kind:** groupant_fragment
- **status:** partial source bound model
- **source:** [`gparse/tests/empty_sentences.rs`](https://github.com/ElamurAI/mova-free/blob/main/gparse/tests/empty_sentences.rs)
- **source SHA-256:** `688b8506e066f8de…`
- **covers:** The decoder_accepts_no_words test supplies a one-row root-only matrix and asserts an empty head vector. (bytes 71–167)
- **part of:** [gparse-test-empty-sentences](https://md.groupants.elamur.ai/free/en/mova/gparse/tests/empty_sentences.rs.groupant/)
- **repository folder:** [`gparse/tests/empty_sentences.rs.groupant/bounded-check.groupant`](https://github.com/ElamurAI/mova-free/tree/main/gparse/tests/empty_sentences.rs.groupant/bounded-check.groupant)
- **repository commit:** `48f2e6f74146`

> **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](#approximant) |
| **ast** | partial | `../syntax.json` |
| **cost** | symbolic source derived | [invariant](#invariant) |
| **descriptant** | present | [descriptant](#descriptant) |
| **invariant** | partial | [invariant](#invariant) |
| **tests** | partial bounded checks | [tests](#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](#behavior-complement) |
| `reverse_reconstruction` | reverse_reconstruction | partial source derived model | [reverse_reconstruction](#reverse-reconstruction) |
| `empty_boundary` | empty_boundary | partial source derived model | [empty_boundary](#empty-boundary) |
| `effect_boundary` | effect_boundary | partial source derived model | [effect_boundary](#effect-boundary) |
| `test_observation` | test_observation | partial source derived model | [test_observation](#test-observation) |
| `branch_coverage` | branch_coverage | partial source derived model | [branch_coverage](#branch-coverage) |

## Model text


### descriptant

#### Source-bound description

The decoder_accepts_no_words test supplies a one-row root-only matrix and asserts an empty head vector.

##### Epoch 2026-10-31

Prospective model was recorded before edits. Added tests use bounded synthetic fixtures; production algorithms unchanged. Coverage is partial, not proof. No trained corpus, live teacher or throughput experiment was executed.

### approximant

#### Forward approximant

The decoder_accepts_no_words test supplies a one-row root-only matrix and asserts an empty head vector.

Domain: valid source-specific dimensions and resources stated in invariant; no automatic production substitution. Numerical observations are finite checks, not an end-to-end relative bound. Executable Rust surrogate: unsupported gap; existing exact tests are not surrogates. Future metric-specific caps may be 1/2/5/10%, never above 10%.

### invariant

#### Invariant and cost

Root-only matrix contains no syntactic words; only CPU decoder path runs.

##### Cost

O(1) fixture and decoder early return.

Allocation, finite arithmetic, platform dimensions and external failures are not universally certified.

### models

## Typed model catalog

### behavior_complement

No nonempty head vector passes this root-only assertion.

### reverse_reconstruction

All one-row matrices are compatible with an empty decoder result, because their cells are not inspected.

### empty_boundary

decode([vec![0.]]) returns []; this does not test general score validation.

### effect_boundary

This scope does not load a model or initialize CUDA.

### test_observation

The assertion observes vector emptiness only, not allocations or matrix cell values.

### branch_coverage

The len<=1 early-return branch runs; n=1 and DP branches do not.

### tests

#### Checks and limits

Selected parent checks relevant to this fragment (not exhaustive): decoder_accepts_no_words; GPU empty saved-model case excluded

Selected commands run twice debug and twice release; exact receipts and source-to-test mapping retained in wave30 gparse external run directory. Tests do not certify allocation failure, all NaN/overflow inputs, trained-model accuracy or corpus timing. Compiled mutants cover selected boundaries; per-source coverage is recorded in the external map, not presumed.