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73 lines
2.6 KiB
73 lines
2.6 KiB
const { assertRevert } = require('../../helpers/assertRevert');
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const { inLogs } = require('../../helpers/expectEvent');
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const { shouldBehaveLikeBurnableToken } = require('./BurnableToken.behaviour');
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const StandardBurnableTokenMock = artifacts.require('StandardBurnableTokenMock');
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const BigNumber = web3.BigNumber;
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const ZERO_ADDRESS = '0x0000000000000000000000000000000000000000';
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require('chai')
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.use(require('chai-as-promised'))
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.use(require('chai-bignumber')(BigNumber))
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.should();
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contract('StandardBurnableToken', function ([owner, burner]) {
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const initialBalance = 1000;
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beforeEach(async function () {
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this.token = await StandardBurnableTokenMock.new(owner, initialBalance);
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});
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shouldBehaveLikeBurnableToken([owner], initialBalance);
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describe('burnFrom', function () {
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describe('on success', function () {
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const amount = 100;
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beforeEach(async function () {
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await this.token.approve(burner, 300, { from: owner });
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const { logs } = await this.token.burnFrom(owner, amount, { from: burner });
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this.logs = logs;
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});
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it('burns the requested amount', async function () {
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const balance = await this.token.balanceOf(owner);
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balance.should.be.bignumber.equal(initialBalance - amount);
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});
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it('decrements allowance', async function () {
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const allowance = await this.token.allowance(owner, burner);
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allowance.should.be.bignumber.equal(200);
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});
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it('emits a burn event', async function () {
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const event = await inLogs(this.logs, 'Burn');
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event.args.burner.should.eq(owner);
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event.args.value.should.be.bignumber.equal(amount);
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});
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it('emits a transfer event', async function () {
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const event = await inLogs(this.logs, 'Transfer');
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event.args.from.should.eq(owner);
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event.args.to.should.eq(ZERO_ADDRESS);
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event.args.value.should.be.bignumber.equal(amount);
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});
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});
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describe('when the given amount is greater than the balance of the sender', function () {
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const amount = initialBalance + 1;
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it('reverts', async function () {
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await this.token.approve(burner, amount, { from: owner });
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await assertRevert(this.token.burnFrom(owner, amount, { from: burner }));
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});
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});
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describe('when the given amount is greater than the allowance', function () {
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const amount = 100;
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it('reverts', async function () {
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await this.token.approve(burner, amount - 1, { from: owner });
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await assertRevert(this.token.burnFrom(owner, amount, { from: burner }));
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});
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});
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});
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});
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