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)

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