web3-testing

1# Web3 Smart Contract Testing
2 
3Master comprehensive testing strategies for smart contracts using Hardhat, Foundry, and advanced testing patterns.
4 
5## When to Use This Skill
6 
7- Writing unit tests for smart contracts
8- Setting up integration test suites
9- Performing gas optimization testing
10- Fuzzing for edge cases
11- Forking mainnet for realistic testing
12- Automating test coverage reporting
13- Verifying contracts on Etherscan
14 
15## Hardhat Testing Setup
16 
17```javascript
18// hardhat.config.js
19require("@nomicfoundation/hardhat-toolbox");
20require("@nomiclabs/hardhat-etherscan");
21require("hardhat-gas-reporter");
22require("solidity-coverage");
23 
24module.exports = {
25  solidity: {
26    version: "0.8.19",
27    settings: {
28      optimizer: {
29        enabled: true,
30        runs: 200,
31      },
32    },
33  },
34  networks: {
35    hardhat: {
36      forking: {
37        url: process.env.MAINNET_RPC_URL,
38        blockNumber: 15000000,
39      },
40    },
41    goerli: {
42      url: process.env.GOERLI_RPC_URL,
43      accounts: [process.env.PRIVATE_KEY],
44    },
45  },
46  gasReporter: {
47    enabled: true,
48    currency: "USD",
49    coinmarketcap: process.env.COINMARKETCAP_API_KEY,
50  },
51  etherscan: {
52    apiKey: process.env.ETHERSCAN_API_KEY,
53  },
54};
55```
56 
57## Unit Testing Patterns
58 
59```javascript
60const { expect } = require("chai");
61const { ethers } = require("hardhat");
62const {
63  loadFixture,
64  time,
65} = require("@nomicfoundation/hardhat-network-helpers");
66 
67describe("Token Contract", function () {
68  // Fixture for test setup
69…