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55 lines
1.8 KiB
55 lines
1.8 KiB
const { ethers } = require('hardhat');
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const { expect } = require('chai');
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const { loadFixture } = require('@nomicfoundation/hardhat-network-helpers');
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const name = 'My Token';
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const symbol = 'MTKN';
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const cap = 1000n;
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async function fixture() {
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const [user] = await ethers.getSigners();
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const token = await ethers.deployContract('$ERC20Capped', [name, symbol, cap]);
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return { user, token, cap };
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}
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describe('ERC20Capped', function () {
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beforeEach(async function () {
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Object.assign(this, await loadFixture(fixture));
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});
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it('requires a non-zero cap', async function () {
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const ERC20Capped = await ethers.getContractFactory('$ERC20Capped');
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await expect(ERC20Capped.deploy(name, symbol, 0))
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.to.be.revertedWithCustomError(ERC20Capped, 'ERC20InvalidCap')
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.withArgs(0);
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});
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describe('capped token', function () {
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it('starts with the correct cap', async function () {
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expect(await this.token.cap()).to.equal(this.cap);
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});
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it('mints when value is less than cap', async function () {
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const value = this.cap - 1n;
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await this.token.$_mint(this.user, value);
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expect(await this.token.totalSupply()).to.equal(value);
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});
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it('fails to mint if the value exceeds the cap', async function () {
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await this.token.$_mint(this.user, this.cap - 1n);
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await expect(this.token.$_mint(this.user, 2))
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.to.be.revertedWithCustomError(this.token, 'ERC20ExceededCap')
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.withArgs(this.cap + 1n, this.cap);
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});
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it('fails to mint after cap is reached', async function () {
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await this.token.$_mint(this.user, this.cap);
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await expect(this.token.$_mint(this.user, 1))
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.to.be.revertedWithCustomError(this.token, 'ERC20ExceededCap')
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.withArgs(this.cap + 1n, this.cap);
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});
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});
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});
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