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const { BN, expectRevert, time } = require('@openzeppelin/test-helpers');
const { expect } = require('chai');
const ERC20Mock = artifacts.require('ERC20Mock');
const TokenTimelock = artifacts.require('TokenTimelock');
contract('TokenTimelock', function (accounts) {
const [ beneficiary ] = accounts;
const name = 'My Token';
const symbol = 'MTKN';
const amount = new BN(100);
context('with token', function () {
beforeEach(async function () {
this.token = await ERC20Mock.new(name, symbol, beneficiary, 0); // We're not using the preminted tokens
});
it('rejects a release time in the past', async function () {
const pastReleaseTime = (await time.latest()).sub(time.duration.years(1));
await expectRevert(
TokenTimelock.new(this.token.address, beneficiary, pastReleaseTime),
'TokenTimelock: release time is before current time',
);
});
context('once deployed', function () {
beforeEach(async function () {
this.releaseTime = (await time.latest()).add(time.duration.years(1));
this.timelock = await TokenTimelock.new(this.token.address, beneficiary, this.releaseTime);
await this.token.mint(this.timelock.address, amount);
});
it('can get state', async function () {
expect(await this.timelock.token()).to.equal(this.token.address);
expect(await this.timelock.beneficiary()).to.equal(beneficiary);
expect(await this.timelock.releaseTime()).to.be.bignumber.equal(this.releaseTime);
});
it('cannot be released before time limit', async function () {
await expectRevert(this.timelock.release(), 'TokenTimelock: current time is before release time');
});
it('cannot be released just before time limit', async function () {
await time.increaseTo(this.releaseTime.sub(time.duration.seconds(3)));
await expectRevert(this.timelock.release(), 'TokenTimelock: current time is before release time');
});
it('can be released just after limit', async function () {
await time.increaseTo(this.releaseTime.add(time.duration.seconds(1)));
await this.timelock.release();
expect(await this.token.balanceOf(beneficiary)).to.be.bignumber.equal(amount);
});
it('can be released after time limit', async function () {
await time.increaseTo(this.releaseTime.add(time.duration.years(1)));
await this.timelock.release();
expect(await this.token.balanceOf(beneficiary)).to.be.bignumber.equal(amount);
});
it('cannot be released twice', async function () {
await time.increaseTo(this.releaseTime.add(time.duration.years(1)));
await this.timelock.release();
await expectRevert(this.timelock.release(), 'TokenTimelock: no tokens to release');
expect(await this.token.balanceOf(beneficiary)).to.be.bignumber.equal(amount);
});
});
});
});