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const { constants, expectEvent, expectRevert } = require('@openzeppelin/test-helpers');
const { ZERO_ADDRESS } = constants;
const { expect } = require('chai');
const Ownable = artifacts.require('OwnableMock');
contract('Ownable', function (accounts) {
const [ owner, other ] = accounts;
beforeEach(async function () {
this.ownable = await Ownable.new({ from: owner });
});
it('has an owner', async function () {
expect(await this.ownable.owner()).to.equal(owner);
});
describe('transfer ownership', function () {
it('changes owner after transfer', async function () {
const receipt = await this.ownable.transferOwnership(other, { from: owner });
expectEvent(receipt, 'OwnershipTransferred');
expect(await this.ownable.owner()).to.equal(other);
});
it('prevents non-owners from transferring', async function () {
await expectRevert(
this.ownable.transferOwnership(other, { from: other }),
'Ownable: caller is not the owner',
);
});
it('guards ownership against stuck state', async function () {
await expectRevert(
this.ownable.transferOwnership(ZERO_ADDRESS, { from: owner }),
'Ownable: new owner is the zero address',
);
});
});
describe('renounce ownership', function () {
it('loses owner after renouncement', async function () {
const receipt = await this.ownable.renounceOwnership({ from: owner });
expectEvent(receipt, 'OwnershipTransferred');
expect(await this.ownable.owner()).to.equal(ZERO_ADDRESS);
});
it('prevents non-owners from renouncement', async function () {
await expectRevert(
this.ownable.renounceOwnership({ from: other }),
'Ownable: caller is not the owner',
);
});
});
});