Web3 Smart Contract Testing

Overview

This public intake copy packages

plugins/antigravity-awesome-skills-claude/skills/web3-testing

https://github.com/sickn33/antigravity-awesome-skills

Use it when the operator needs the upstream workflow, support files, and repository context to stay intact while the public validator and private enhancer continue their normal downstream flow.

This intake keeps the copied upstream files intact and uses

metadata.json

ORIGIN.md

Web3 Smart Contract Testing Master comprehensive testing strategies for smart contracts using Hardhat, Foundry, and advanced testing patterns.

Imported source sections that did not map cleanly to the public headings are still preserved below or in the support files. Notable imported sections: Unit Testing Patterns, Foundry Testing (Forge), Advanced Testing Patterns, Gas Optimization Testing, Coverage Reporting, Contract Verification.

When to Use This Skill

Use this section as the trigger filter. It should make the activation boundary explicit before the operator loads files, runs commands, or opens a pull request.

• The task is unrelated to web3 smart contract testing
• You need a different domain or tool outside this scope
• Writing unit tests for smart contracts
• Setting up integration test suites
• Performing gas optimization testing
• Fuzzing for edge cases

Operating Table

metadata.json

ORIGIN.md

SKILL.md

SKILL.md

## Related Skills

Workflow

This workflow is intentionally editorial and operational at the same time. It keeps the imported source useful to the operator while still satisfying the public intake standards that feed the downstream enhancer flow.

1. Clarify goals, constraints, and required inputs.
2. Apply relevant best practices and validate outcomes.
3. Provide actionable steps and verification.
4. If detailed examples are required, open resources/implementation-playbook.md.
5. Confirm the user goal, the scope of the imported workflow, and whether this skill is still the right router for the task.
6. Read the overview and provenance files before loading any copied upstream support files.
7. Load only the references, examples, prompts, or scripts that materially change the outcome for the current request.

Imported Workflow Notes

Imported: Instructions

• Clarify goals, constraints, and required inputs.
• Apply relevant best practices and validate outcomes.
• Provide actionable steps and verification.
• If detailed examples are required, open

  resources/implementation-playbook.md

  .

Imported: Hardhat Testing Setup

// hardhat.config.js
require("@nomicfoundation/hardhat-toolbox");
require("@nomiclabs/hardhat-etherscan");
require("hardhat-gas-reporter");
require("solidity-coverage");

module.exports = {
  solidity: {
    version: "0.8.19",
    settings: {
      optimizer: {
        enabled: true,
        runs: 200,
      },
    },
  },
  networks: {
    hardhat: {
      forking: {
        url: process.env.MAINNET_RPC_URL,
        blockNumber: 15000000,
      },
    },
    goerli: {
      url: process.env.GOERLI_RPC_URL,
      accounts: [process.env.PRIVATE_KEY],
    },
  },
  gasReporter: {
    enabled: true,
    currency: "USD",
    coinmarketcap: process.env.COINMARKETCAP_API_KEY,
  },
  etherscan: {
    apiKey: process.env.ETHERSCAN_API_KEY,
  },
};

Imported: Unit Testing Patterns

const { expect } = require("chai");
const { ethers } = require("hardhat");
const {
  loadFixture,
  time,
} = require("@nomicfoundation/hardhat-network-helpers");

describe("Token Contract", function () {
  // Fixture for test setup
  async function deployTokenFixture() {
    const [owner, addr1, addr2] = await ethers.getSigners();

    const Token = await ethers.getContractFactory("Token");
    const token = await Token.deploy();

    return { token, owner, addr1, addr2 };
  }

  describe("Deployment", function () {
    it("Should set the right owner", async function () {
      const { token, owner } = await loadFixture(deployTokenFixture);
      expect(await token.owner()).to.equal(owner.address);
    });

    it("Should assign total supply to owner", async function () {
      const { token, owner } = await loadFixture(deployTokenFixture);
      const ownerBalance = await token.balanceOf(owner.address);
      expect(await token.totalSupply()).to.equal(ownerBalance);
    });
  });

  describe("Transactions", function () {
    it("Should transfer tokens between accounts", async function () {
      const { token, owner, addr1 } = await loadFixture(deployTokenFixture);

      await expect(token.transfer(addr1.address, 50)).to.changeTokenBalances(
        token,
        [owner, addr1],
        [-50, 50],
      );
    });

    it("Should fail if sender doesn't have enough tokens", async function () {
      const { token, addr1 } = await loadFixture(deployTokenFixture);
      const initialBalance = await token.balanceOf(addr1.address);

      await expect(
        token.connect(addr1).transfer(owner.address, 1),
      ).to.be.revertedWith("Insufficient balance");
    });

    it("Should emit Transfer event", async function () {
      const { token, owner, addr1 } = await loadFixture(deployTokenFixture);

      await expect(token.transfer(addr1.address, 50))
        .to.emit(token, "Transfer")
        .withArgs(owner.address, addr1.address, 50);
    });
  });

  describe("Time-based tests", function () {
    it("Should handle time-locked operations", async function () {
      const { token } = await loadFixture(deployTokenFixture);

      // Increase time by 1 day
      await time.increase(86400);

      // Test time-dependent functionality
    });
  });

  describe("Gas optimization", function () {
    it("Should use gas efficiently", async function () {
      const { token } = await loadFixture(deployTokenFixture);

      const tx = await token.transfer(addr1.address, 100);
      const receipt = await tx.wait();

      expect(receipt.gasUsed).to.be.lessThan(50000);
    });
  });
});

Examples

Example 1: Ask for the upstream workflow directly

Use @web3-testing to handle <task>. Start from the copied upstream workflow, load only the files that change the outcome, and keep provenance visible in the answer.

Explanation: This is the safest starting point when the operator needs the imported workflow, but not the entire repository.

Example 2: Ask for a provenance-grounded review

Review @web3-testing against metadata.json and ORIGIN.md, then explain which copied upstream files you would load first and why.

Explanation: Use this before review or troubleshooting when you need a precise, auditable explanation of origin and file selection.

Example 3: Narrow the copied support files before execution

Use @web3-testing for <task>. Load only the copied references, examples, or scripts that change the outcome, and name the files explicitly before proceeding.

Explanation: This keeps the skill aligned with progressive disclosure instead of loading the whole copied package by default.

Example 4: Build a reviewer packet

Review @web3-testing using the copied upstream files plus provenance, then summarize any gaps before merge.

Explanation: This is useful when the PR is waiting for human review and you want a repeatable audit packet.

Best Practices

Treat the generated public skill as a reviewable packaging layer around the upstream repository. The goal is to keep provenance explicit and load only the copied source material that materially improves execution.

• Test Coverage: Aim for >90% coverage
• Edge Cases: Test boundary conditions
• Gas Limits: Verify functions don't hit block gas limit
• Reentrancy: Test for reentrancy vulnerabilities
• Access Control: Test unauthorized access attempts
• Events: Verify event emissions
• Fixtures: Use fixtures to avoid code duplication

Imported Operating Notes

Imported: Best Practices

1. Test Coverage: Aim for >90% coverage
2. Edge Cases: Test boundary conditions
3. Gas Limits: Verify functions don't hit block gas limit
4. Reentrancy: Test for reentrancy vulnerabilities
5. Access Control: Test unauthorized access attempts
6. Events: Verify event emissions
7. Fixtures: Use fixtures to avoid code duplication
8. Mainnet Fork: Test with real contracts
9. Fuzzing: Use property-based testing
10. CI/CD: Automate testing on every commit

Troubleshooting

Problem: The operator skipped the imported context and answered too generically

Symptoms: The result ignores the upstream workflow in

plugins/antigravity-awesome-skills-claude/skills/web3-testing

metadata.json

ORIGIN.md

Problem: The imported workflow feels incomplete during review

Symptoms: Reviewers can see the generated

SKILL.md

Problem: The task drifted into a different specialization

Symptoms: The imported skill starts in the right place, but the work turns into debugging, architecture, design, security, or release orchestration that a native skill handles better. Solution: Use the related skills section to hand off deliberately. Keep the imported provenance visible so the next skill inherits the right context instead of starting blind.

Related Skills

• @00-andruia-consultant-v2

  - Use when the work is better handled by that native specialization after this imported skill establishes context.

• @10-andruia-skill-smith-v2

  - Use when the work is better handled by that native specialization after this imported skill establishes context.

• @20-andruia-niche-intelligence-v2

  - Use when the work is better handled by that native specialization after this imported skill establishes context.

• @3d-web-experience-v2

  - Use when the work is better handled by that native specialization after this imported skill establishes context.

Additional Resources

Use this support matrix and the linked files below as the operator packet for this imported skill. They should reflect real copied source material, not generic scaffolding.

references

references/n/a

examples

examples/n/a

scripts

scripts/n/a

agents

agents/n/a

assets

assets/n/a

Imported Reference Notes

Imported: Resources

• references/hardhat-setup.md: Hardhat configuration guide
• references/foundry-setup.md: Foundry testing framework
• references/test-patterns.md: Testing best practices
• references/mainnet-forking.md: Fork testing strategies
• references/contract-verification.md: Etherscan verification
• assets/hardhat-config.js: Complete Hardhat configuration
• assets/test-suite.js: Comprehensive test examples
• assets/foundry.toml: Foundry configuration
• scripts/test-contract.sh: Automated testing script

Imported: Foundry Testing (Forge)

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "forge-std/Test.sol";
import "../src/Token.sol";

contract TokenTest is Test {
    Token token;
    address owner = address(1);
    address user1 = address(2);
    address user2 = address(3);

    function setUp() public {
        vm.prank(owner);
        token = new Token();
    }

    function testInitialSupply() public {
        assertEq(token.totalSupply(), 1000000 * 10**18);
    }

    function testTransfer() public {
        vm.prank(owner);
        token.transfer(user1, 100);

        assertEq(token.balanceOf(user1), 100);
        assertEq(token.balanceOf(owner), token.totalSupply() - 100);
    }

    function testFailTransferInsufficientBalance() public {
        vm.prank(user1);
        token.transfer(user2, 100); // Should fail
    }

    function testCannotTransferToZeroAddress() public {
        vm.prank(owner);
        vm.expectRevert("Invalid recipient");
        token.transfer(address(0), 100);
    }

    // Fuzzing test
    function testFuzzTransfer(uint256 amount) public {
        vm.assume(amount > 0 && amount <= token.totalSupply());

        vm.prank(owner);
        token.transfer(user1, amount);

        assertEq(token.balanceOf(user1), amount);
    }

    // Test with cheatcodes
    function testDealAndPrank() public {
        // Give ETH to address
        vm.deal(user1, 10 ether);

        // Impersonate address
        vm.prank(user1);

        // Test functionality
        assertEq(user1.balance, 10 ether);
    }

    // Mainnet fork test
    function testForkMainnet() public {
        vm.createSelectFork("https://eth-mainnet.alchemyapi.io/v2/...");

        // Interact with mainnet contracts
        address dai = 0x6B175474E89094C44Da98b954EedeAC495271d0F;
        assertEq(IERC20(dai).symbol(), "DAI");
    }
}

Imported: Advanced Testing Patterns

Snapshot and Revert

describe("Complex State Changes", function () {
  let snapshotId;

  beforeEach(async function () {
    snapshotId = await network.provider.send("evm_snapshot");
  });

  afterEach(async function () {
    await network.provider.send("evm_revert", [snapshotId]);
  });

  it("Test 1", async function () {
    // Make state changes
  });

  it("Test 2", async function () {
    // State reverted, clean slate
  });
});

Mainnet Forking

describe("Mainnet Fork Tests", function () {
  let uniswapRouter, dai, usdc;

  before(async function () {
    await network.provider.request({
      method: "hardhat_reset",
      params: [
        {
          forking: {
            jsonRpcUrl: process.env.MAINNET_RPC_URL,
            blockNumber: 15000000,
          },
        },
      ],
    });

    // Connect to existing mainnet contracts
    uniswapRouter = await ethers.getContractAt(
      "IUniswapV2Router",
      "0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D",
    );

    dai = await ethers.getContractAt(
      "IERC20",
      "0x6B175474E89094C44Da98b954EedeAC495271d0F",
    );
  });

  it("Should swap on Uniswap", async function () {
    // Test with real Uniswap contracts
  });
});

Impersonating Accounts

it("Should impersonate whale account", async function () {
  const whaleAddress = "0x...";

  await network.provider.request({
    method: "hardhat_impersonateAccount",
    params: [whaleAddress],
  });

  const whale = await ethers.getSigner(whaleAddress);

  // Use whale's tokens
  await dai
    .connect(whale)
    .transfer(addr1.address, ethers.utils.parseEther("1000"));
});

Imported: Gas Optimization Testing

const { expect } = require("chai");

describe("Gas Optimization", function () {
  it("Compare gas usage between implementations", async function () {
    const Implementation1 =
      await ethers.getContractFactory("OptimizedContract");
    const Implementation2 = await ethers.getContractFactory(
      "UnoptimizedContract",
    );

    const contract1 = await Implementation1.deploy();
    const contract2 = await Implementation2.deploy();

    const tx1 = await contract1.doSomething();
    const receipt1 = await tx1.wait();

    const tx2 = await contract2.doSomething();
    const receipt2 = await tx2.wait();

    console.log("Optimized gas:", receipt1.gasUsed.toString());
    console.log("Unoptimized gas:", receipt2.gasUsed.toString());

    expect(receipt1.gasUsed).to.be.lessThan(receipt2.gasUsed);
  });
});

Imported: Coverage Reporting

# Generate coverage report
npx hardhat coverage

# Output shows:
# File                | % Stmts | % Branch | % Funcs | % Lines |
# -------------------|---------|----------|---------|---------|
# contracts/Token.sol |   100   |   90     |   100   |   95    |

Imported: Contract Verification

// Verify on Etherscan
await hre.run("verify:verify", {
  address: contractAddress,
  constructorArguments: [arg1, arg2],
});

# Or via CLI
npx hardhat verify --network mainnet CONTRACT_ADDRESS "Constructor arg1" "arg2"

Imported: CI/CD Integration

# .github/workflows/test.yml
name: Tests

on: [push, pull_request]

jobs:
  test:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v2
      - uses: actions/setup-node@v2
        with:
          node-version: "16"

      - run: npm install
      - run: npx hardhat compile
      - run: npx hardhat test
      - run: npx hardhat coverage

      - name: Upload coverage to Codecov
        uses: codecov/codecov-action@v2

Imported: Limitations

• Use this skill only when the task clearly matches the scope described above.
• Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
• Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.