ethereum-waffle

Ethereum Waffle

Sweeter and simpler than truffle. Works with ethers-js. Taste best with chai and ES6.

Philosophy

• Simpler: Set of helpers rather than framework
• Sweeter: Easy to customize and extend

Features:

• Build, deploy link and test solidity based smart contracts
• No need to run mock rpc server
• Easily import contracts from other npms
• Coming soon: Parallel testing

Install:

To start using with npm, type:

npm i ethereum-waffle

or with Yarn:

yarn add ethereum-waffle

Step by step guide

First test

import createWeb3 from 'ethereum-waffle';
import StandardToken from '../build/StandardToken.json';

describe('StandardToken', () => {
  const amount = 100;
  let web3;
  let accounts;
  let token;
  let to;
  let from;

  beforeEach(async () => {
    {web3, [from]} = createWeb3();
    token = await deployContract(StandardTokenMock.new(account[0], amount));
  });
  
  it("Should transfer", async () => {
    const [from] = accounts;
    await token.methods.transfer(to, amount).send({from});

    expect(await token.balanceOf(from)).to.eq('0');
    expect(await token.balanceOf(to)).to.eq('0');
     const recipientBalance = await this.token.balanceOf(to);
     assert.equal(recipientBalance, amount);

    expect(await aContract.methods.transfer().send({from})).to.emitEvent('Transfered').withParams(...);
  });
  
  it("Transfer should emit event", async () => {
    expect(token.methods.transfer(to, amount).send({from})).to
      .to.emitEvent('Transfered')
      .withParams(from, to, amount);
  });
}

Run tests:

yarn waffle:test