# MI8 - Deterministic Seeds/Snapshots (Fixed RNG, Frozen Timestamps)

## Module
Web

## Status
PARTIALLY_IMPLEMENTED

## Description
Deterministic fixture files exist for testing. Storybook preview is configured. However, specific chromatic.disableAnimation parameters and fixed seed exports from a `micro-fixtures.ts` file were not verified.

## What's Implemented
- **Existing services**:
  - `determinization` (`src/Web/StellaOps.Web/src/app/core/services/determinization/determinization.service.ts`)

## What's Missing
- **Fixed RNG seed exports**: No `micro-fixtures.ts` file exporting deterministic seed values for Storybook stories and tests
- **Frozen timestamps**: No globally-configurable frozen timestamp provider for deterministic date rendering in snapshots
- **chromatic.disableAnimation**: Storybook preview may not have `chromatic.disableAnimation` configured for consistent visual regression snapshots
- **Deterministic service integration**: `determinization.service.ts` exists but its usage across all Storybook stories for reproducible snapshots is not confirmed

## Implementation Plan
- Create `micro-fixtures.ts` with exported seed values and frozen timestamp provider
- Configure `chromatic.disableAnimation` in Storybook preview config
- Wire `determinization.service.ts` into all Storybook stories for reproducible rendering
- Add documentation for deterministic snapshot patterns

## E2E Test Plan
- **Setup**:
  - [ ] Log in with a user that has appropriate permissions
  - [ ] Navigate to the relevant page/section where this feature appears
  - [ ] Ensure test data exists (scanned artifacts, SBOM data, or seed data as needed)
- **Core verification**:
  - [ ] Verify the component renders correctly with sample data
  - [ ] Verify interactive elements respond to user input
  - [ ] Verify data is fetched and displayed from the correct API endpoints
- **Edge cases**:
  - [ ] Verify graceful handling when backend API is unavailable (error state)
  - [ ] Verify responsive layout at different viewport sizes
  - [ ] Verify accessibility (keyboard navigation, screen reader labels, ARIA attributes)