Add ERC20 compatibility to ERC777. (#1735)
* Add ERC20 compatibility. * Reusing ERC20 tests for ERC777. * Improve documentation. * Add changelog entry. * Improved ERC20 behavior tests. * Add revert reasons to ERC777. * ERC20 methods allow sending tokens to contracts with no interface. * Register ERC20 interface. * Add comment about avoidLockingTokens. * Improve revert reason string. * Make ERC777 implement IERC20. * Fix test revert string. * Remove unnecesary require. * Add private _transfer. * Update contracts/drafts/ERC777/ERC777.sol Co-Authored-By: nventuro <nicolas.venturo@gmail.com> * Update private helper names.
This commit is contained in:
Nicolás Venturo
GitHub
268
test/token/ERC20/ERC20.behavior.js
Normal file
268
test/token/ERC20/ERC20.behavior.js
Normal file
@ -0,0 +1,268 @@
|
||||
const { BN, constants, expectEvent, shouldFail } = require('openzeppelin-test-helpers');
|
||||
const { ZERO_ADDRESS } = constants;
|
||||
|
||||
function shouldBehaveLikeERC20 (errorPrefix, initialSupply, initialHolder, recipient, anotherAccount) {
|
||||
describe('total supply', function () {
|
||||
it('returns the total amount of tokens', async function () {
|
||||
(await this.token.totalSupply()).should.be.bignumber.equal(initialSupply);
|
||||
});
|
||||
});
|
||||
|
||||
describe('balanceOf', function () {
|
||||
describe('when the requested account has no tokens', function () {
|
||||
it('returns zero', async function () {
|
||||
(await this.token.balanceOf(anotherAccount)).should.be.bignumber.equal('0');
|
||||
});
|
||||
});
|
||||
|
||||
describe('when the requested account has some tokens', function () {
|
||||
it('returns the total amount of tokens', async function () {
|
||||
(await this.token.balanceOf(initialHolder)).should.be.bignumber.equal(initialSupply);
|
||||
});
|
||||
});
|
||||
});
|
||||
|
||||
describe('transfer', function () {
|
||||
describe('when the recipient is not the zero address', function () {
|
||||
const to = recipient;
|
||||
|
||||
describe('when the sender does not have enough balance', function () {
|
||||
const amount = initialSupply.addn(1);
|
||||
|
||||
it('reverts', async function () {
|
||||
await shouldFail.reverting.withMessage(this.token.transfer(to, amount, { from: initialHolder }),
|
||||
'SafeMath: subtraction overflow'
|
||||
);
|
||||
});
|
||||
});
|
||||
|
||||
describe('when the sender has enough balance', function () {
|
||||
const amount = initialSupply;
|
||||
|
||||
it('transfers the requested amount', async function () {
|
||||
await this.token.transfer(to, amount, { from: initialHolder });
|
||||
|
||||
(await this.token.balanceOf(initialHolder)).should.be.bignumber.equal('0');
|
||||
|
||||
(await this.token.balanceOf(to)).should.be.bignumber.equal(amount);
|
||||
});
|
||||
|
||||
it('emits a transfer event', async function () {
|
||||
const { logs } = await this.token.transfer(to, amount, { from: initialHolder });
|
||||
|
||||
expectEvent.inLogs(logs, 'Transfer', {
|
||||
from: initialHolder,
|
||||
to: to,
|
||||
value: amount,
|
||||
});
|
||||
});
|
||||
});
|
||||
});
|
||||
|
||||
describe('when the recipient is the zero address', function () {
|
||||
const to = ZERO_ADDRESS;
|
||||
|
||||
it('reverts', async function () {
|
||||
await shouldFail.reverting.withMessage(this.token.transfer(to, initialSupply, { from: initialHolder }),
|
||||
`${errorPrefix}: transfer to the zero address`
|
||||
);
|
||||
});
|
||||
});
|
||||
});
|
||||
|
||||
describe('transfer from', function () {
|
||||
const spender = recipient;
|
||||
|
||||
describe('when the recipient is not the zero address', function () {
|
||||
const to = anotherAccount;
|
||||
|
||||
describe('when the spender has enough approved balance', function () {
|
||||
beforeEach(async function () {
|
||||
await this.token.approve(spender, initialSupply, { from: initialHolder });
|
||||
});
|
||||
|
||||
describe('when the initial holder has enough balance', function () {
|
||||
const amount = initialSupply;
|
||||
|
||||
it('transfers the requested amount', async function () {
|
||||
await this.token.transferFrom(initialHolder, to, amount, { from: spender });
|
||||
|
||||
(await this.token.balanceOf(initialHolder)).should.be.bignumber.equal('0');
|
||||
|
||||
(await this.token.balanceOf(to)).should.be.bignumber.equal(amount);
|
||||
});
|
||||
|
||||
it('decreases the spender allowance', async function () {
|
||||
await this.token.transferFrom(initialHolder, to, amount, { from: spender });
|
||||
|
||||
(await this.token.allowance(initialHolder, spender)).should.be.bignumber.equal('0');
|
||||
});
|
||||
|
||||
it('emits a transfer event', async function () {
|
||||
const { logs } = await this.token.transferFrom(initialHolder, to, amount, { from: spender });
|
||||
|
||||
expectEvent.inLogs(logs, 'Transfer', {
|
||||
from: initialHolder,
|
||||
to: to,
|
||||
value: amount,
|
||||
});
|
||||
});
|
||||
|
||||
it('emits an approval event', async function () {
|
||||
const { logs } = await this.token.transferFrom(initialHolder, to, amount, { from: spender });
|
||||
|
||||
expectEvent.inLogs(logs, 'Approval', {
|
||||
owner: initialHolder,
|
||||
spender: spender,
|
||||
value: await this.token.allowance(initialHolder, spender),
|
||||
});
|
||||
});
|
||||
});
|
||||
|
||||
describe('when the initial holder does not have enough balance', function () {
|
||||
const amount = initialSupply.addn(1);
|
||||
|
||||
it('reverts', async function () {
|
||||
await shouldFail.reverting.withMessage(this.token.transferFrom(
|
||||
initialHolder, to, amount, { from: spender }), 'SafeMath: subtraction overflow'
|
||||
);
|
||||
});
|
||||
});
|
||||
});
|
||||
|
||||
describe('when the spender does not have enough approved balance', function () {
|
||||
beforeEach(async function () {
|
||||
await this.token.approve(spender, initialSupply.subn(1), { from: initialHolder });
|
||||
});
|
||||
|
||||
describe('when the initial holder has enough balance', function () {
|
||||
const amount = initialSupply;
|
||||
|
||||
it('reverts', async function () {
|
||||
await shouldFail.reverting.withMessage(this.token.transferFrom(
|
||||
initialHolder, to, amount, { from: spender }), 'SafeMath: subtraction overflow'
|
||||
);
|
||||
});
|
||||
});
|
||||
|
||||
describe('when the initial holder does not have enough balance', function () {
|
||||
const amount = initialSupply.addn(1);
|
||||
|
||||
it('reverts', async function () {
|
||||
await shouldFail.reverting.withMessage(this.token.transferFrom(
|
||||
initialHolder, to, amount, { from: spender }), 'SafeMath: subtraction overflow'
|
||||
);
|
||||
});
|
||||
});
|
||||
});
|
||||
});
|
||||
|
||||
describe('when the recipient is the zero address', function () {
|
||||
const amount = initialSupply;
|
||||
const to = ZERO_ADDRESS;
|
||||
|
||||
beforeEach(async function () {
|
||||
await this.token.approve(spender, amount, { from: initialHolder });
|
||||
});
|
||||
|
||||
it('reverts', async function () {
|
||||
await shouldFail.reverting.withMessage(this.token.transferFrom(
|
||||
initialHolder, to, amount, { from: spender }), `${errorPrefix}: transfer to the zero address`
|
||||
);
|
||||
});
|
||||
});
|
||||
});
|
||||
|
||||
describe('approve', function () {
|
||||
shouldBehaveLikeERC20Approve(errorPrefix, initialHolder, recipient, initialSupply,
|
||||
function (owner, spender, amount) {
|
||||
return this.token.approve(spender, amount, { from: owner });
|
||||
}
|
||||
);
|
||||
});
|
||||
}
|
||||
|
||||
function shouldBehaveLikeERC20Approve (errorPrefix, owner, spender, supply, approve) {
|
||||
describe('when the spender is not the zero address', function () {
|
||||
describe('when the sender has enough balance', function () {
|
||||
const amount = supply;
|
||||
|
||||
it('emits an approval event', async function () {
|
||||
const { logs } = await approve.call(this, owner, spender, amount);
|
||||
|
||||
expectEvent.inLogs(logs, 'Approval', {
|
||||
owner: owner,
|
||||
spender: spender,
|
||||
value: amount,
|
||||
});
|
||||
});
|
||||
|
||||
describe('when there was no approved amount before', function () {
|
||||
it('approves the requested amount', async function () {
|
||||
await approve.call(this, owner, spender, amount);
|
||||
|
||||
(await this.token.allowance(owner, spender)).should.be.bignumber.equal(amount);
|
||||
});
|
||||
});
|
||||
|
||||
describe('when the spender had an approved amount', function () {
|
||||
beforeEach(async function () {
|
||||
await approve.call(this, owner, spender, new BN(1));
|
||||
});
|
||||
|
||||
it('approves the requested amount and replaces the previous one', async function () {
|
||||
await approve.call(this, owner, spender, amount);
|
||||
|
||||
(await this.token.allowance(owner, spender)).should.be.bignumber.equal(amount);
|
||||
});
|
||||
});
|
||||
});
|
||||
|
||||
describe('when the sender does not have enough balance', function () {
|
||||
const amount = supply.addn(1);
|
||||
|
||||
it('emits an approval event', async function () {
|
||||
const { logs } = await approve.call(this, owner, spender, amount);
|
||||
|
||||
expectEvent.inLogs(logs, 'Approval', {
|
||||
owner: owner,
|
||||
spender: spender,
|
||||
value: amount,
|
||||
});
|
||||
});
|
||||
|
||||
describe('when there was no approved amount before', function () {
|
||||
it('approves the requested amount', async function () {
|
||||
await approve.call(this, owner, spender, amount);
|
||||
|
||||
(await this.token.allowance(owner, spender)).should.be.bignumber.equal(amount);
|
||||
});
|
||||
});
|
||||
|
||||
describe('when the spender had an approved amount', function () {
|
||||
beforeEach(async function () {
|
||||
await approve.call(this, owner, spender, new BN(1));
|
||||
});
|
||||
|
||||
it('approves the requested amount and replaces the previous one', async function () {
|
||||
await approve.call(this, owner, spender, amount);
|
||||
|
||||
(await this.token.allowance(owner, spender)).should.be.bignumber.equal(amount);
|
||||
});
|
||||
});
|
||||
});
|
||||
});
|
||||
|
||||
describe('when the spender is the zero address', function () {
|
||||
it('reverts', async function () {
|
||||
await shouldFail.reverting.withMessage(approve.call(this, owner, ZERO_ADDRESS, supply),
|
||||
`${errorPrefix}: approve to the zero address`
|
||||
);
|
||||
});
|
||||
});
|
||||
}
|
||||
|
||||
module.exports = {
|
||||
shouldBehaveLikeERC20,
|
||||
shouldBehaveLikeERC20Approve,
|
||||
};
|
||||
Reference in New Issue
Block a user