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53 lines
1.7 KiB
53 lines
1.7 KiB
const { assertRevert } = require('../../helpers/assertRevert');
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const { inLogs } = require('../../helpers/expectEvent');
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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-bignumber')(BigNumber))
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.should();
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function shouldBehaveLikeBurnableToken ([owner], initialBalance) {
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describe('as a basic burnable token', function () {
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const from = owner;
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describe('when the given amount is not greater than balance of the sender', function () {
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const amount = 100;
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beforeEach(async function () {
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({ logs: this.logs } = await this.token.burn(amount, { from }));
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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(from);
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balance.should.be.bignumber.equal(initialBalance - amount);
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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 assertRevert(this.token.burn(amount, { from }));
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});
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});
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});
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}
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module.exports = {
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shouldBehaveLikeBurnableToken,
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};
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