---
title: "world-tests — Mova code model"
description: "Mova code model of world/src/tests.rs: components with their labels, obernants and the model text."
url: "https://groupants.elamur.ai/free/en/mova/world/src/tests.rs.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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# world-tests

The groupant beside world/src/tests.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
- **status:** partial source bound model
- **source:** [`world/src/tests.rs`](https://github.com/ElamurAI/mova-free/blob/main/world/src/tests.rs)
- **source SHA-256:** `955fe3b913e60c6b…`
- **repository folder:** [`world/src/tests.rs.groupant`](https://github.com/ElamurAI/mova-free/tree/main/world/src/tests.rs.groupant)
- **repository commit:** `855da7bd4a7b`

> **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` |
| **composition** | partial | [composition](#composition) |
| **cost** | partial | [Cost](#cost) |
| **descriptant** | present | [descriptant](#descriptant) |
| **invariant** | partial | `model.md` |
| **tests** | bounded checks partial scope | [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) |
| `rollback_projection` | rollback_projection | partial source derived model | [rollback_projection](#rollback-projection) |
| `immutable_history` | immutable_history | partial source derived model | [immutable_history](#immutable-history) |
| `ordered_verdict` | ordered_verdict | partial source derived model | [ordered_verdict](#ordered-verdict) |
| `execution_boundary` | execution_boundary | partial source derived model | [execution_boundary](#execution-boundary) |

## Parts

- [world-tests-rollback](https://md.groupants.elamur.ai/free/en/mova/world/src/tests.rs.groupant/rollback.groupant/)
- [world-tests-format](https://md.groupants.elamur.ai/free/en/mova/world/src/tests.rs.groupant/format.groupant/)

## Model text


### descriptant

#### world-tests

text generates numbered sentences; line requires one accepted command; world parses all commands then applies sequentially with panic on first rejection. gate_of requires Err and returns its Gate. Selected checks cover strict format, rollback after bad have/give, immutable versions after later deltas, and ordered/alternative verdict matching. Other v1/v2 examples and natural-language reader cases remain unexecuted. Observation relation for rejection: O(apply(W,c))=O(W) for the tested rejected c, O=(character versions,event count,links-valid). Historical relation snap(W_after,C1,v_saved)=snap(W_before,C1,v_saved).

##### Modeling epoch — 2026-10-31

Read full assigned source before editing; prospective predictions retained in external wave29 receipts. Stored/live/parser-dependent test paths are excluded from execution. Evidence is limited to named bounded fixtures; registration is partial modeling. Production behavior unchanged; only inline synthetic tests added to four assigned sources.

### approximant

#### Forward relation

text generates numbered sentences; line requires one accepted command; world parses all commands then applies sequentially with panic on first rejection. gate_of requires Err and returns its Gate. Selected checks cover strict format, rollback after bad have/give, immutable versions after later deltas, and ordered/alternative verdict matching. Other v1/v2 examples and natural-language reader cases remain unexecuted. Observation relation for rejection: O(apply(W,c))=O(W) for the tested rejected c, O=(character versions,event count,links-valid). Historical relation snap(W_after,C1,v_saved)=snap(W_before,C1,v_saved).

##### Domain and resource limits

Finite valid structures and allocation-success executions under the branch conditions in models.md; integer overflow is outside measured fixtures. Exact categorical relations have no supplied percent surrogate. Macro expansion, arbitrary model quality and external effects are not inferred from syntax.

### invariant

## Invariant

Version comparisons are value equality, not pointer identity; format failures precede execution. New current snapshot differs while historical snapshot/delta stays equal.

### Cost

Finite fixtures plus delegated parse/apply/snapshot/link costs; no timing/scalability claim.

### composition

#### Composition

Scoped children: rollback, format. text generates numbered sentences; line requires one accepted command; world parses all commands then applies sequentially with panic on first rejection. gate_of requires Err and returns its Gate. Selected checks cover strict format, rollback after bad have/give, immutable versions after later deltas, and ordered/alternative verdict matching. Other v1/v2 examples and natural-language reader cases remain unexecuted. Observation relation for rejection: O(apply(W,c))=O(W) for the tested rejected c, O=(character versions,event count,links-valid). Historical relation snap(W_after,C1,v_saved)=snap(W_before,C1,v_saved). Other functions and test additions are modeled only at this parent. bAbI Story and command World have different representations: command-language fixtures do not certify the UD parser adapter. StepGame lexical/load helpers connect directly to tests03; CLI helpers construct a separate world process but this wave does not spawn it. No composition-wide percent accuracy follows.

### models

### behavior_complement

Selected fixture relation excludes successful mismatched have C2 O1, mutation of an old C1 snapshot, accepting duplicate to= fields and matching fox>crow against crow then fox evidence. These finite assertions do not prove all states.

### reverse_reconstruction

Passing rollback constrains observed character versions, event count and link validity for two rejected commands, leaving unobserved fields unconstrained. Verdict Hit admits any answer containing the matched ordered alternatives; original question cannot be reconstructed.

### rollback_projection

Reject test compares character version vector/event count and check_links, not every World field.

### immutable_history

Saved state equals old state after changes; latest delta omits redundant Type/Name.

### ordered_verdict

crow>fox hit, fox>crow miss; comma conjunction and bar alternatives differ.

### execution_boundary

qframe/annotator/read paths require model; stored Wen derives from held-out data. Exact selected names exclude them.

### tests

#### Bounded checks

Named checks associated with this source (not every fragment branch):

- tests::format_is_strict
- tests::rejected_command_leaves_world_unchanged
- tests::old_states_stay_immutable
- tests::verdict_respects_order_and_alternatives

17 unique named tests in total passed twice debug and twice release; sorted named outcomes equal across all four runs. Four compiled controls cover bAbI identity, StepGame tie ordering, parser-command state removal and bench-command CPU selection; each exits101 at a runtime assertion, exact source restored then positive exit0. Other sources have finite adversarial fixtures but no separately compiled mutant.

CLI integration coverage is command construction and temporary cleanup only; legacy school/model/cadence paths are not executed. No speed benchmark, GPU, live teacher, datasets or held-out replay.

Limits:

- Only four synthetic tests executed; no model, stored VMM replay or held-out fixtures
- Finite assertions not executor proof; executable percentage approximant unsupported

External receipt root: $MOVA_DATA/runs/octopus-wave29-worldeval-2026-10-31.