69 lines
2.4 KiB
TypeScript
69 lines
2.4 KiB
TypeScript
import path from 'path'
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import chai from 'chai'
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import { solidity, createMockProvider, getWallets, deployContract } from 'ethereum-waffle'
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import { Contract } from 'ethers'
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import { BigNumber, bigNumberify } from 'ethers/utils'
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import ERC20 from '../build/ERC20.json'
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chai.use(solidity)
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const { expect } = chai
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const decimalize = (n: number): BigNumber => bigNumberify(n).mul(bigNumberify(10).pow(18))
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const name = 'Mock ERC20'
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const symbol = 'MOCK'
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const decimals = 18
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const totalSupply = decimalize(100)
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const transferAmount = decimalize(100)
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describe('ERC20', () => {
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const provider = createMockProvider(path.join(__dirname, '..', 'waffle.json'))
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const [wallet, walletTo] = getWallets(provider)
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let token: Contract
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beforeEach(async () => {
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token = await deployContract(wallet, ERC20, [name, symbol, decimals, totalSupply])
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})
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it('name, symbol, decimals, totalSupply, balanceOf', async () => {
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expect(await token.name()).to.eq(name)
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expect(await token.symbol()).to.eq(symbol)
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expect(await token.decimals()).to.eq(18)
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expect(await token.totalSupply()).to.eq(totalSupply)
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expect(await token.balanceOf(wallet.address)).to.eq(totalSupply)
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})
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it('transfer', async () => {
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await expect(token.transfer(walletTo.address, transferAmount))
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.to.emit(token, 'Transfer')
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.withArgs(wallet.address, walletTo.address, transferAmount)
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expect(await token.balanceOf(wallet.address)).to.eq(totalSupply.sub(transferAmount))
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expect(await token.balanceOf(walletTo.address)).to.eq(transferAmount)
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})
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it('transferFrom', async () => {
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await expect(token.approve(walletTo.address, transferAmount))
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.to.emit(token, 'Approval')
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.withArgs(wallet.address, walletTo.address, transferAmount)
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await expect(token.connect(walletTo).transferFrom(wallet.address, walletTo.address, transferAmount))
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.to.emit(token, 'Transfer')
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.withArgs(wallet.address, walletTo.address, transferAmount)
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expect(await token.balanceOf(wallet.address)).to.eq(totalSupply.sub(transferAmount))
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expect(await token.balanceOf(walletTo.address)).to.eq(transferAmount)
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})
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it('transfer fails', async () => {
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await expect(token.transfer(walletTo.address, totalSupply.add(1))).to.be.revertedWith(
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'SafeMath: subtraction overflow'
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)
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await expect(token.connect(walletTo).transfer(walletTo.address, 1)).to.be.revertedWith(
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'SafeMath: subtraction overflow'
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)
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})
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})
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