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74 lines
2.9 KiB
74 lines
2.9 KiB
const { expectRevert, time } = require('@openzeppelin/test-helpers');
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const { expect } = require('chai');
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const { batchInBlock } = require('../helpers/txpool');
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const CheckpointsImpl = artifacts.require('CheckpointsImpl');
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contract('Checkpoints', function (accounts) {
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beforeEach(async function () {
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this.checkpoint = await CheckpointsImpl.new();
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});
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describe('without checkpoints', function () {
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it('returns zero as latest value', async function () {
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expect(await this.checkpoint.latest()).to.be.bignumber.equal('0');
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});
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it('returns zero as past value', async function () {
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await time.advanceBlock();
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expect(await this.checkpoint.getAtBlock(await web3.eth.getBlockNumber() - 1)).to.be.bignumber.equal('0');
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});
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});
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describe('with checkpoints', function () {
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beforeEach('pushing checkpoints', async function () {
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this.tx1 = await this.checkpoint.push(1);
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this.tx2 = await this.checkpoint.push(2);
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await time.advanceBlock();
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this.tx3 = await this.checkpoint.push(3);
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await time.advanceBlock();
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await time.advanceBlock();
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});
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it('returns latest value', async function () {
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expect(await this.checkpoint.latest()).to.be.bignumber.equal('3');
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});
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it('returns past values', async function () {
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expect(await this.checkpoint.getAtBlock(this.tx1.receipt.blockNumber - 1)).to.be.bignumber.equal('0');
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expect(await this.checkpoint.getAtBlock(this.tx1.receipt.blockNumber)).to.be.bignumber.equal('1');
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expect(await this.checkpoint.getAtBlock(this.tx2.receipt.blockNumber)).to.be.bignumber.equal('2');
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// Block with no new checkpoints
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expect(await this.checkpoint.getAtBlock(this.tx2.receipt.blockNumber + 1)).to.be.bignumber.equal('2');
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expect(await this.checkpoint.getAtBlock(this.tx3.receipt.blockNumber)).to.be.bignumber.equal('3');
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expect(await this.checkpoint.getAtBlock(this.tx3.receipt.blockNumber + 1)).to.be.bignumber.equal('3');
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});
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it('reverts if block number >= current block', async function () {
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await expectRevert(
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this.checkpoint.getAtBlock(await web3.eth.getBlockNumber()),
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'Checkpoints: block not yet mined',
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);
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await expectRevert(
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this.checkpoint.getAtBlock(await web3.eth.getBlockNumber() + 1),
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'Checkpoints: block not yet mined',
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);
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});
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it('multiple checkpoints in the same block', async function () {
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const lengthBefore = await this.checkpoint.length();
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await batchInBlock([
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() => this.checkpoint.push(8, { gas: 100000 }),
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() => this.checkpoint.push(9, { gas: 100000 }),
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() => this.checkpoint.push(10, { gas: 100000 }),
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]);
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const lengthAfter = await this.checkpoint.length();
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expect(lengthAfter.toNumber()).to.be.equal(lengthBefore.toNumber() + 1);
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expect(await this.checkpoint.latest()).to.be.bignumber.equal('10');
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});
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});
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});
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