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Fix decrease allowance and add non-zero address precondition to approve (#1293)

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* rename {increase,decrease}Approval to {increase,decrease}Allowance

* add non-zero spender check to approve and {increase,decrease}Allowance

* Updated tests to reflect the new behavior.

* fix wrong test description

* fix old function names

* Fixed linter error.

* Fixed typo.
This commit is contained in:
Francisco Giordano
2018-09-07 10:01:31 -03:00
committed by GitHub
parent e7e8d8eac1
commit 84e63bbf8b
4 changed files with 60 additions and 121 deletions
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143
test/token/ERC20/ERC20.test.js
View File

@ -158,20 +158,8 @@ contract('ERC20', function ([_, owner, recipient, anotherAccount]) {
const amount = 100;
const spender = ZERO_ADDRESS;
it('approves the requested amount', async function () {
await this.token.approve(spender, amount, { from: owner });
(await this.token.allowance(owner, spender)).should.be.bignumber.equal(amount);
});
it('emits an approval event', async function () {
const { logs } = await this.token.approve(spender, amount, { from: owner });
logs.length.should.equal(1);
logs[0].event.should.equal('Approval');
logs[0].args.owner.should.equal(owner);
logs[0].args.spender.should.equal(spender);
logs[0].args.value.should.be.bignumber.equal(amount);
it('reverts', async function () {
await assertRevert(this.token.approve(spender, amount, { from: owner }));
});
});
});
@ -261,28 +249,14 @@ contract('ERC20', function ([_, owner, recipient, anotherAccount]) {
});
});
describe('decrease approval', function () {
describe('decrease allowance', function () {
describe('when the spender is not the zero address', function () {
const spender = recipient;
describe('when the sender has enough balance', function () {
const amount = 100;
it('emits an approval event', async function () {
const { logs } = await this.token.decreaseApproval(spender, amount, { from: owner });
logs.length.should.equal(1);
logs[0].event.should.equal('Approval');
logs[0].args.owner.should.equal(owner);
logs[0].args.spender.should.equal(spender);
logs[0].args.value.should.be.bignumber.equal(0);
});
function shouldDecreaseApproval (amount) {
describe('when there was no approved amount before', function () {
it('keeps the allowance to zero', async function () {
await this.token.decreaseApproval(spender, amount, { from: owner });
(await this.token.allowance(owner, spender)).should.be.bignumber.equal(0);
it('reverts', async function () {
await assertRevert(this.token.decreaseAllowance(spender, amount, { from: owner }));
});
});
@ -290,59 +264,46 @@ contract('ERC20', function ([_, owner, recipient, anotherAccount]) {
const approvedAmount = amount;
beforeEach(async function () {
await this.token.approve(spender, approvedAmount, { from: owner });
({ logs: this.logs } = await this.token.approve(spender, approvedAmount, { from: owner }));
});
it('emits an approval event', async function () {
const { logs } = await this.token.decreaseAllowance(spender, approvedAmount, { from: owner });
logs.length.should.equal(1);
logs[0].event.should.equal('Approval');
logs[0].args.owner.should.equal(owner);
logs[0].args.spender.should.equal(spender);
logs[0].args.value.should.be.bignumber.equal(0);
});
it('decreases the spender allowance subtracting the requested amount', async function () {
await this.token.decreaseApproval(spender, approvedAmount - 5, { from: owner });
await this.token.decreaseAllowance(spender, approvedAmount - 1, { from: owner });
(await this.token.allowance(owner, spender)).should.be.bignumber.equal(5);
(await this.token.allowance(owner, spender)).should.be.bignumber.equal(1);
});
it('sets the allowance to zero when all allowance is removed', async function () {
await this.token.decreaseApproval(spender, approvedAmount, { from: owner });
await this.token.decreaseAllowance(spender, approvedAmount, { from: owner });
(await this.token.allowance(owner, spender)).should.be.bignumber.equal(0);
});
it('sets the allowance to zero when more than the full allowance is removed', async function () {
await this.token.decreaseApproval(spender, approvedAmount + 5, { from: owner });
(await this.token.allowance(owner, spender)).should.be.bignumber.equal(0);
it('reverts when more than the full allowance is removed', async function () {
await assertRevert(this.token.decreaseAllowance(spender, approvedAmount + 1, { from: owner }));
});
});
}
describe('when the sender has enough balance', function () {
const amount = 100;
shouldDecreaseApproval(amount);
});
describe('when the sender does not have enough balance', function () {
const amount = 101;
it('emits an approval event', async function () {
const { logs } = await this.token.decreaseApproval(spender, amount, { from: owner });
logs.length.should.equal(1);
logs[0].event.should.equal('Approval');
logs[0].args.owner.should.equal(owner);
logs[0].args.spender.should.equal(spender);
logs[0].args.value.should.be.bignumber.equal(0);
});
describe('when there was no approved amount before', function () {
it('keeps the allowance to zero', async function () {
await this.token.decreaseApproval(spender, amount, { from: owner });
(await this.token.allowance(owner, spender)).should.be.bignumber.equal(0);
});
});
describe('when the spender had an approved amount', function () {
beforeEach(async function () {
await this.token.approve(spender, amount + 1, { from: owner });
});
it('decreases the spender allowance subtracting the requested amount', async function () {
await this.token.decreaseApproval(spender, amount, { from: owner });
(await this.token.allowance(owner, spender)).should.be.bignumber.equal(1);
});
});
shouldDecreaseApproval(amount);
});
});
@ -350,25 +311,13 @@ contract('ERC20', function ([_, owner, recipient, anotherAccount]) {
const amount = 100;
const spender = ZERO_ADDRESS;
it('decreases the requested amount', async function () {
await this.token.decreaseApproval(spender, amount, { from: owner });
(await this.token.allowance(owner, spender)).should.be.bignumber.equal(0);
});
it('emits an approval event', async function () {
const { logs } = await this.token.decreaseApproval(spender, amount, { from: owner });
logs.length.should.equal(1);
logs[0].event.should.equal('Approval');
logs[0].args.owner.should.equal(owner);
logs[0].args.spender.should.equal(spender);
logs[0].args.value.should.be.bignumber.equal(0);
it('reverts', async function () {
await assertRevert(this.token.decreaseAllowance(spender, amount, { from: owner }));
});
});
});
describe('increase approval', function () {
describe('increase allowance', function () {
const amount = 100;
describe('when the spender is not the zero address', function () {
@ -376,7 +325,7 @@ contract('ERC20', function ([_, owner, recipient, anotherAccount]) {
describe('when the sender has enough balance', function () {
it('emits an approval event', async function () {
const { logs } = await this.token.increaseApproval(spender, amount, { from: owner });
const { logs } = await this.token.increaseAllowance(spender, amount, { from: owner });
logs.length.should.equal(1);
logs[0].event.should.equal('Approval');
@ -387,7 +336,7 @@ contract('ERC20', function ([_, owner, recipient, anotherAccount]) {
describe('when there was no approved amount before', function () {
it('approves the requested amount', async function () {
await this.token.increaseApproval(spender, amount, { from: owner });
await this.token.increaseAllowance(spender, amount, { from: owner });
(await this.token.allowance(owner, spender)).should.be.bignumber.equal(amount);
});
@ -399,7 +348,7 @@ contract('ERC20', function ([_, owner, recipient, anotherAccount]) {
});
it('increases the spender allowance adding the requested amount', async function () {
await this.token.increaseApproval(spender, amount, { from: owner });
await this.token.increaseAllowance(spender, amount, { from: owner });
(await this.token.allowance(owner, spender)).should.be.bignumber.equal(amount + 1);
});
@ -410,7 +359,7 @@ contract('ERC20', function ([_, owner, recipient, anotherAccount]) {
const amount = 101;
it('emits an approval event', async function () {
const { logs } = await this.token.increaseApproval(spender, amount, { from: owner });
const { logs } = await this.token.increaseAllowance(spender, amount, { from: owner });
logs.length.should.equal(1);
logs[0].event.should.equal('Approval');
@ -421,7 +370,7 @@ contract('ERC20', function ([_, owner, recipient, anotherAccount]) {
describe('when there was no approved amount before', function () {
it('approves the requested amount', async function () {
await this.token.increaseApproval(spender, amount, { from: owner });
await this.token.increaseAllowance(spender, amount, { from: owner });
(await this.token.allowance(owner, spender)).should.be.bignumber.equal(amount);
});
@ -433,7 +382,7 @@ contract('ERC20', function ([_, owner, recipient, anotherAccount]) {
});
it('increases the spender allowance adding the requested amount', async function () {
await this.token.increaseApproval(spender, amount, { from: owner });
await this.token.increaseAllowance(spender, amount, { from: owner });
(await this.token.allowance(owner, spender)).should.be.bignumber.equal(amount + 1);
});
@ -444,20 +393,8 @@ contract('ERC20', function ([_, owner, recipient, anotherAccount]) {
describe('when the spender is the zero address', function () {
const spender = ZERO_ADDRESS;
it('approves the requested amount', async function () {
await this.token.increaseApproval(spender, amount, { from: owner });
(await this.token.allowance(owner, spender)).should.be.bignumber.equal(amount);
});
it('emits an approval event', async function () {
const { logs } = await this.token.increaseApproval(spender, amount, { from: owner });
logs.length.should.equal(1);
logs[0].event.should.equal('Approval');
logs[0].args.owner.should.equal(owner);
logs[0].args.spender.should.equal(spender);
logs[0].args.value.should.be.bignumber.equal(amount);
it('reverts', async function () {
await assertRevert(this.token.increaseAllowance(spender, amount, { from: owner }));
});
});
});

12
test/token/ERC20/ERC20Pausable.test.js
View File

@ -196,7 +196,7 @@ contract('ERC20Pausable', function ([_, pauser, otherPauser, recipient, anotherA
});
it('allows to decrease approval when unpaused', async function () {
await this.token.decreaseApproval(anotherAccount, 40, { from: pauser });
await this.token.decreaseAllowance(anotherAccount, 40, { from: pauser });
(await this.token.allowance(pauser, anotherAccount)).should.be.bignumber.equal(60);
});
@ -205,7 +205,7 @@ contract('ERC20Pausable', function ([_, pauser, otherPauser, recipient, anotherA
await this.token.pause({ from: pauser });
await this.token.unpause({ from: pauser });
await this.token.decreaseApproval(anotherAccount, 40, { from: pauser });
await this.token.decreaseAllowance(anotherAccount, 40, { from: pauser });
(await this.token.allowance(pauser, anotherAccount)).should.be.bignumber.equal(60);
});
@ -213,7 +213,7 @@ contract('ERC20Pausable', function ([_, pauser, otherPauser, recipient, anotherA
it('reverts when trying to transfer when paused', async function () {
await this.token.pause({ from: pauser });
await assertRevert(this.token.decreaseApproval(anotherAccount, 40, { from: pauser }));
await assertRevert(this.token.decreaseAllowance(anotherAccount, 40, { from: pauser }));
});
});
@ -223,7 +223,7 @@ contract('ERC20Pausable', function ([_, pauser, otherPauser, recipient, anotherA
});
it('allows to increase approval when unpaused', async function () {
await this.token.increaseApproval(anotherAccount, 40, { from: pauser });
await this.token.increaseAllowance(anotherAccount, 40, { from: pauser });
(await this.token.allowance(pauser, anotherAccount)).should.be.bignumber.equal(140);
});
@ -232,7 +232,7 @@ contract('ERC20Pausable', function ([_, pauser, otherPauser, recipient, anotherA
await this.token.pause({ from: pauser });
await this.token.unpause({ from: pauser });
await this.token.increaseApproval(anotherAccount, 40, { from: pauser });
await this.token.increaseAllowance(anotherAccount, 40, { from: pauser });
(await this.token.allowance(pauser, anotherAccount)).should.be.bignumber.equal(140);
});
@ -240,7 +240,7 @@ contract('ERC20Pausable', function ([_, pauser, otherPauser, recipient, anotherA
it('reverts when trying to increase approval when paused', async function () {
await this.token.pause({ from: pauser });
await assertRevert(this.token.increaseApproval(anotherAccount, 40, { from: pauser }));
await assertRevert(this.token.increaseAllowance(anotherAccount, 40, { from: pauser }));
});
});
});