Spawn and manage isolated anvil EVM instances for vitest tests.
npx skills add https://github.com/niconiahi/ethernauta --skill testing-niconiahi
Please help me install this Agent Skill. Skill: testing Source: https://github.com/niconiahi/ethernauta/tree/main/skills/testing Command: npx skills add https://github.com/niconiahi/ethernauta --skill testing-niconiahi
It eliminates the pain of setting up and maintaining a consistent local Ethereum test environment by giving each test its own isolated anvil state with reliable snapshot/revert handling.
Use case example: You’re building a dapp and want confidence that your create_reader / create_provider flow behaves correctly against a real EVM without writing custom global setup or manually cleaning state between tests.
Add the vitest plugin line to your vitest.config.ts and import anvil in your test file so your existing reader/provider calls run against a fresh, per-test isolated anvil instance.
High-intent search queries and answers about installing and using this skill.
To run isolated EVM tests with vitest and anvil, add the provided vitest plugin to your configuration file to automatically spawn a worker-scoped anvil process and manage its lifecycle. This setup ensures each test suite executes against a dedicated local Ethereum instance.
Snapshot revert isolation works by taking an EVM snapshot before a test executes and reverting to that exact state afterward. This mechanism ensures every test runs against a clean, deterministic local chain state without needing manual cleanup or global setup teardown.
Yes, you can use fork mode for deterministic chain state testing in vitest. The Skill supports optional fork mode through env-option parsing and validation at boundaries, allowing your local anvil instance to fork off a specific network state for targeted scenario testing.
The best way to manage anvil RPC bindings in an EVM test suite is importing the single root barrel API exported by the Skill. This API provides direct access to anvil RPC method bindings like snapshot, revert, mine, and time travel alongside deterministic account derivation utilities.
Your dapp provider integration test fails without per-test EVM cleanliness because residual state mutations from previous tests pollute the chain. Spawning a worker-scoped anvil instance with per-test snapshot and revert isolation guarantees the deterministic chain state required for reliable execution.
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