Map the interaction surface
Count input types, workflow states, user roles, and external systems involved.
FEATURE RISK SCANNER
Edge Case Discovery Assistant
Estimate a feature's edge-case surface from inputs, states, roles, integrations, and recovery needs, then prioritise what to test first.
- Uses your inputs in a transparent calculation
- Instant result with practical next steps
- No signup required
Planning guidance only. Validate important decisions with customer evidence and your delivery team.
YOUR INPUTS
Build your result
Complete every field. The result updates only when you choose Calculate.
How it works
Calculate starter coverage
Visible allowances expand the count for state, role, integration-failure, and recovery combinations.
Prioritise failure paths
Start with permission boundaries, irreversible actions, partial success, retries, and recovery.
Continue learning: What to look for in MVP debugging tools · Architecture decisions AI coding tools should not make
Frequently asked questions
Does the result list every possible edge case?
No. It estimates a starter coverage set. Domain rules, real incidents, accessibility, security, concurrency, and platform behaviour can add cases.
Why multiply states by roles?
The same state may expose different actions or data to different roles. The tool uses half the full combination count as a lightweight allowance.
Should every scenario become an automated test?
No. Automate stable high-value checks and use exploratory, integration, security, or usability testing where those methods fit better.
How We Compare
| Feature | MVPHub | GitHub Copilot | Cursor |
|---|---|---|---|
| Focused input-based assessment | Included | Limited | Limited |
| Transparent calculation | Included | Limited | Limited |
| No repository access required | Included | Limited | Limited |
| Workflow-specific next steps | Included | Limited | Limited |
GitHub Copilot and Cursor can suggest code and tests using supplied context. MVPHub provides a transparent scenario-count model and checklist without reading or changing a repository.
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