Edge Case Test Scenario Suggester from Function Signature

WHAT IT DOES

Edge Case Test Scenario Suggester from Function Signature helps developers identify critical test cases by analyzing the function signature alone. It parses the function name, parameter types, and optional context to generate a structured list of edge cases — covering boundary values, security concerns, logic pitfalls, and gas-related issues. Each suggestion includes a clear title and a detailed explanation of what to test and why. This turns a single function signature into a ready‑to‑use test checklist, reducing the chance of missing subtle bugs during manual test writing.

HOW TO USE

Enter a Solidity function signature in the input field — for example, "transfer(uint256 amount, address to)". Optionally add a contract context snippet (e.g., "ERC20 token with max supply cap") to refine suggestions. Click "suggest edge cases". The tool returns a categorized list of test scenarios, each with a severity‑aligned category (Boundary, Security, Logic, Gas). Use these scenarios to write or expand your test suite, ensuring you cover common failure points like zero values, overflow, access control bypasses, and reentrancy vectors. The output is a guide, not executable code — you implement the actual tests.

THE REAL MECHANISM

The suggester uses a rule‑based engine that maps parameter types to known edge case patterns. For uint types, it suggests zero, max, and overflow/underflow scenarios. For address types, it flags zero address, contract addresses, and self‑calls. Boolean, string, bytes, and array types each trigger specific boundary and security checks. The engine also scans the optional context for keywords like "onlyOwner", "pause", "whitelist", "cap", or "payable" to inject access‑control and state‑dependent scenarios. Each rule is designed to surface the most common yet easily overlooked test cases in Solidity development. The output is prioritized by likelihood of finding a bug, based on historical vulnerability patterns in EVM contracts.

WHAT IT CANNOT SEE

The tool cannot determine which edge cases are actually exploitable in context, detect state‑dependent edge cases that depend on the contract's storage, verify that suggested scenarios cover all security‑relevant paths, handle complex multi‑contract interactions, assess the actual impact of edge cases, or generate full executable test code. The suggestions are a starting point — not a complete audit or a guarantee of test coverage. Always combine with manual reasoning and domain‑specific knowledge.

PLEASE NOTE — EVM CHAINS ONLY

This tool is designed for Solidity functions on Ethereum Virtual Machine (EVM) compatible chains. It follows EVM‑specific integer overflow/underflow semantics and access control patterns. All processing occurs in your browser; no contract data is stored or transmitted.