aave-protocol-v2/test-suites/test-amm/rate-strategy.spec.ts

// import {
//   IReserveParams,
//   iAavePoolAssets,
//   iAssetsWithoutETH,
//   ITestEnvWithoutInstances,
// } from "../utils/types"
// import {

//   LendingPoolAddressesProviderInstance,

//   DefaultReserveInterestRateStrategyInstance,
//   MintableERC20Instance,
// } from "../utils/typechain-types/truffle-contracts"
// import { testEnvProviderWithoutInstances} from "../utils/truffle/dlp-tests-env"
// import {RAY} from "../utils/constants"
// import BigNumber from "bignumber.js"

// const {expect} = require("chai")

// contract("Interest rate strategy", async ([deployer, ...users]) => {
//   let _testEnvProvider: ITestEnvWithoutInstances
//   let _strategyInstance: DefaultReserveInterestRateStrategyInstance
//   let _tokenInstances: iAssetsWithoutETH<MintableERC20Instance>
//   let _addressesProviderInstance: LendingPoolAddressesProviderInstance
//   let _reservesParams: iAavePoolAssets<IReserveParams>

//   before("Initializing test variables", async () => {
//     console.time('setup-test');
//     _testEnvProvider = await testEnvProviderWithoutInstances(
//       artifacts,
//       [deployer, ...users],
//     )

//     const {
//       getAllAssetsInstances,
//       getLendingPoolAddressesProviderInstance,
//       getAavePoolReservesParams,
//     } = _testEnvProvider

//     const instances = await Promise.all([
//       getAllAssetsInstances(),
//       getLendingPoolAddressesProviderInstance()
//     ])

//     _tokenInstances = instances[0]
//     _addressesProviderInstance = instances[1]
//     _reservesParams = await getAavePoolReservesParams()
//     console.timeEnd('setup-test');
//   })

//   it("Deploys a new instance of a DefaultReserveInterestRateStrategy contract", async () => {
//     const {DAI: daiInstance} = _tokenInstances

//     const {DAI: daiConfiguration} = _reservesParams

//     const contract: any = await artifacts.require("DefaultReserveInterestRateStrategy")
//     const mathLibrary = await artifacts.require("WadRayMath")
//     const mathLibraryInstance = await mathLibrary.new()

//     await contract.link("WadRayMath", mathLibraryInstance.address)

//     _strategyInstance = await contract.new(
//       daiInstance.address,
//       _addressesProviderInstance.address,
//       daiConfiguration.baseVariableBorrowRate,
//       daiConfiguration.variableRateSlope1,
//       daiConfiguration.variableRateSlope2,
//       daiConfiguration.stableRateSlope1,
//       daiConfiguration.stableRateSlope2,
//     )
//   })

//   it("Checks rates at 0% utilization rate", async () => {
//     const {DAI: daiInstance} = _tokenInstances
//     const {DAI: daiConfiguration} = _reservesParams
//     const data: any = await _strategyInstance.calculateInterestRates(
//       daiInstance.address,
//       "1000000000000000000",
//       "0",
//       "0",
//       "0",
//     )

//     expect(data.currentLiquidityRate.toString()).to.be.equal("0", "Invalid liquidity rate")
//     expect(data.currentStableBorrowRate.toString()).to.be.equal(
//       new BigNumber(0.039).times(RAY).toFixed(0),
//       "Invalid stable rate",
//     )
//     expect(data.currentVariableBorrowRate.toString()).to.be.equal(
//       daiConfiguration.baseVariableBorrowRate,
//       "Invalid variable rate",
//     )
//   })

//   it("Checks rates at 80% utilization rate", async () => {
//     const {DAI: daiInstance} = _tokenInstances
//     const {DAI: daiConfiguration} = _reservesParams
//     const data: any = await _strategyInstance.calculateInterestRates(
//       daiInstance.address,
//       "200000000000000000",
//       "0",
//       "800000000000000000",
//       "0",
//     )

//     const expectedVariableRate = new BigNumber(daiConfiguration.baseVariableBorrowRate)
//     .plus(daiConfiguration.variableRateSlope1)

//     expect(data.currentLiquidityRate.toString()).to.be.equal(
//       expectedVariableRate.times(0.8).toFixed(0),
//       "Invalid liquidity rate",
//     )

//     expect(data.currentVariableBorrowRate.toString()).to.be.equal(
//       new BigNumber(daiConfiguration.baseVariableBorrowRate)
//         .plus(daiConfiguration.variableRateSlope1)
//         .toFixed(0),
//       "Invalid variable rate",
//     )

//     expect(data.currentStableBorrowRate.toString()).to.be.equal(
//       new BigNumber(0.039)
//         .times(RAY)
//         .plus(daiConfiguration.stableRateSlope1)
//         .toFixed(0),
//       "Invalid stable rate",
//     )
//   })

//   it("Checks rates at 100% utilization rate", async () => {
//     const {DAI: daiInstance} = _tokenInstances
//     const {DAI: daiConfiguration} = _reservesParams
//     const data: any = await _strategyInstance.calculateInterestRates(
//       daiInstance.address,
//       "0",
//       "0",
//       "1000000000000000000",
//       "0",
//     )

//     const expectedVariableRate = new BigNumber(daiConfiguration.baseVariableBorrowRate)
//     .plus(daiConfiguration.variableRateSlope1)
//     .plus(daiConfiguration.variableRateSlope2)
//     .toFixed(0)

//     expect(data.currentLiquidityRate.toString()).to.be.equal(
//       expectedVariableRate,
//       "Invalid liquidity rate",
//     )

//     expect(data.currentVariableBorrowRate.toString()).to.be.equal(
//       expectedVariableRate,
//       "Invalid variable rate",
//     )

//     expect(data.currentStableBorrowRate.toString()).to.be.equal(
//       new BigNumber(0.039)
//         .times(RAY)
//         .plus(daiConfiguration.stableRateSlope1)
//         .plus(daiConfiguration.stableRateSlope2)
//         .toFixed(0),
//       "Invalid stable rate",
//     )
//   })
// })