---
id: PLN-0108
ticket: real-render-worker-establishment
title: Migrate Tests to TestPlatform
status: done
created: 2026-06-06
completed:
ref_decisions: [DEC-0032]
tags: [tests, platform, fixtures]
---

## Objective

Replace remaining test dependence on `Hardware::new()` and `HardwareBridge` with `TestPlatform` or narrower facade fixtures.

## Background

`DEC-0032` requires tests that need a full local platform fixture to use `TestPlatform`, not hidden `HardwareBridge` compatibility.

## Scope

### Included

- VM runtime tests.
- Firmware tests.
- Driver integration tests that still use monolithic hardware only as fixture.
- Host debugger tests where applicable.

### Excluded

- Do not remove production bridge until tests are migrated.
- Do not change behavior under test.

## Execution Steps

### Step 1 - Inventory test dependencies

**What:** Find all direct `Hardware::new()` and `HardwareBridge` test uses.
**How:** Use `rg` and classify by domain.
**File(s):** test modules across `crates/console` and `crates/host`.

### Step 2 - Migrate full-platform tests

**What:** Replace `Hardware::new()` with `TestPlatform`.
**How:** Use explicit facade accessors in assertions.
**File(s):** `crates/console/prometeu-system/src/services/vm_runtime/tests*.rs`, firmware tests.

### Step 3 - Migrate narrow tests

**What:** Replace full platform with narrower fixtures where only one domain is under test.
**How:** Use render/composer/audio/input/asset fixtures directly.
**File(s):** driver and runtime test modules.

## Test Requirements

### Unit Tests

- All migrated tests pass.

### Integration Tests

- `cargo test --workspace` or relevant workspace subset if full workspace is too broad.

### Manual Verification

- `rg "Hardware::new\\(|HardwareBridge" crates --glob '*test*'` shows no test dependency except tests explicitly covering legacy removal.

## Acceptance Criteria

- [ ] `TestPlatform` is the default full platform fixture.
- [ ] Tests no longer preserve `HardwareBridge` by habit.
- [ ] Narrow tests use narrower fixtures.

## Dependencies

- `PLN-0103`.
- `PLN-0107`.

## Risks

- Large mechanical changes can hide behavior regressions. Keep commits grouped by test domain.