51 lines
1.8 KiB
JavaScript
51 lines
1.8 KiB
JavaScript
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const { expect } = require("chai")
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describe("Collateral", function () {
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let collateral, token
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let account0, account1
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beforeEach(async function () {
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let Collateral = await ethers.getContractFactory("Collateral")
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let TestToken = await ethers.getContractFactory("TestToken")
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token = await TestToken.deploy()
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collateral = await Collateral.deploy(token.address)
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;[account0, account1] = await ethers.getSigners()
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await token.mint(account0.address, 1000)
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await token.mint(account1.address, 1000)
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})
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it("assigns zero collateral by default", async function () {
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expect(await collateral.balanceOf(account0.address)).to.equal(0)
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expect(await collateral.balanceOf(account1.address)).to.equal(0)
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})
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describe("depositing", function () {
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beforeEach(async function () {
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await token.connect(account0).approve(collateral.address, 100)
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await token.connect(account1).approve(collateral.address, 100)
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})
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it("updates the amount of collateral", async function () {
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await collateral.connect(account0).deposit(40)
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await collateral.connect(account1).deposit(2)
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expect(await collateral.balanceOf(account0.address)).to.equal(40)
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expect(await collateral.balanceOf(account1.address)).to.equal(2)
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})
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it("transfers tokens to the contract", async function () {
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let before = await token.balanceOf(collateral.address)
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await collateral.deposit(42)
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let after = await token.balanceOf(collateral.address)
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expect(after - before).to.equal(42)
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})
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it("fails when token transfer fails", async function () {
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let allowed = await token.allowance(account0.address, collateral.address)
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let invalidAmount = allowed.toNumber() + 1
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await expect(collateral.deposit(invalidAmount)).to.be.revertedWith(
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"ERC20: transfer amount exceeds allowance"
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)
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})
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})
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})
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