test: add GhoManager unit tests, mocked PoolConfigurator

src/contracts/foundry-test/TestEnv.sol

@@ -7,6 +7,7 @@ import {WETH9Mock} from '@aave/periphery-v3/contracts/mocks/WETH9Mock.sol';
 import {ERC20} from '@aave/core-v3/contracts/dependencies/openzeppelin/contracts/ERC20.sol';
 import {GhoAToken} from '../facilitators/aave/tokens/GhoAToken.sol';
 import {GhoToken} from '../gho/GhoToken.sol';
+import {MockedConfigurator} from './mocks/MockedConfigurator.sol';
 import {MockedPool} from './mocks/MockedPool.sol';
 import {MockedProvider} from './mocks/MockedProvider.sol';
 import {MockedAclManager} from './mocks/MockedAclManager.sol';
@@ -28,6 +29,7 @@ import {IERC20} from 'aave-stk-v1-5/src/interfaces/IERC20.sol';
 import {IGhoVariableDebtTokenTransferHook} from 'aave-stk-v1-5/src/interfaces/IGhoVariableDebtTokenTransferHook.sol';
 import {GhoOracle} from '../facilitators/aave/oracle/GhoOracle.sol';
 import {AdminUpgradeabilityProxy} from '@aave/core-v3/contracts/dependencies/openzeppelin/upgradeability/AdminUpgradeabilityProxy.sol';
+import {Errors} from '@aave/core-v3/contracts/protocol/libraries/helpers/Errors.sol';
 
 contract TestEnv is Test {
   address constant faucet = 0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266;
@@ -48,6 +50,7 @@ contract TestEnv is Test {
   MockedPool POOL;
   MockedAclManager ACL_MANAGER;
   MockedProvider PROVIDER;
+  MockedConfigurator CONFIGURATOR;
   WETH9Mock WETH;
   GhoVariableDebtToken GHO_DEBT_TOKEN;
   GhoAToken GHO_ATOKEN;
@@ -61,6 +64,7 @@ contract TestEnv is Test {
     ACL_MANAGER = new MockedAclManager();
     PROVIDER = new MockedProvider(address(ACL_MANAGER));
     POOL = new MockedPool(IPoolAddressesProvider(address(PROVIDER)));
+    CONFIGURATOR = new MockedConfigurator(IPool(POOL));
     GHO_ORACLE = new GhoOracle();
     GHO_TOKEN = new GhoToken();
     AAVE_TOKEN = new TestnetERC20('AAVE', 'AAVE', 18, faucet);

src/contracts/foundry-test/TestGhoManager.t.sol

@@ -0,0 +1,75 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+import 'forge-std/Test.sol';
+
+import './TestEnv.sol';
+import {IPool} from '@aave/core-v3/contracts/interfaces/IPool.sol';
+import {Errors} from '@aave/core-v3/contracts/protocol/libraries/helpers/Errors.sol';
+import {DebtUtils} from './libraries/DebtUtils.sol';
+import {GhoActions} from './libraries/GhoActions.sol';
+import {GhoManager} from '../facilitators/aave/misc/GhoManager.sol';
+
+contract TestGhoManager is Test, GhoActions {
+  GhoManager ghoManager;
+  address public alice;
+
+  event DiscountRateStrategyUpdated(
+    address indexed oldDiscountRateStrategy,
+    address indexed newDiscountRateStrategy
+  );
+
+  event ReserveInterestRateStrategyChanged(
+    address indexed asset,
+    address oldStrategy,
+    address newStrategy
+  );
+
+  function setUp() public {
+    ghoManager = new GhoManager();
+    alice = users[0];
+  }
+
+  function testUpdateDiscountRateStrategy() public {
+    vm.expectEmit(true, true, false, true, address(GHO_DEBT_TOKEN));
+    emit DiscountRateStrategyUpdated(
+      address(GHO_DISCOUNT_STRATEGY),
+      address(GHO_DISCOUNT_STRATEGY)
+    );
+    ghoManager.updateDiscountRateStrategy(address(GHO_DEBT_TOKEN), address(GHO_DISCOUNT_STRATEGY));
+  }
+
+  function testRevertUnauthorizedUpdateDiscountRateStrategy() public {
+    vm.prank(alice);
+    vm.expectRevert();
+    ghoManager.updateDiscountRateStrategy(address(GHO_DEBT_TOKEN), address(GHO_DISCOUNT_STRATEGY));
+  }
+
+  function testSetReserveInterestRateStrategy() public {
+    address oldInterestStrategy = POOL.getReserveInterestRateStrategyAddress(address(GHO_TOKEN));
+    GhoInterestRateStrategy newInterestStrategy = new GhoInterestRateStrategy(2e25);
+    vm.expectEmit(true, true, true, true, address(CONFIGURATOR));
+    emit ReserveInterestRateStrategyChanged(
+      address(GHO_TOKEN),
+      oldInterestStrategy,
+      address(newInterestStrategy)
+    );
+    ghoManager.setReserveInterestRateStrategyAddress(
+      address(CONFIGURATOR),
+      address(GHO_TOKEN),
+      address(newInterestStrategy)
+    );
+  }
+
+  function testRevertUnauthorizedSetReserveInterestRateStrategy() public {
+    address oldInterestStrategy = POOL.getReserveInterestRateStrategyAddress(address(GHO_TOKEN));
+    GhoInterestRateStrategy newInterestStrategy = new GhoInterestRateStrategy(2e25);
+    vm.prank(alice);
+    vm.expectRevert();
+    ghoManager.setReserveInterestRateStrategyAddress(
+      address(CONFIGURATOR),
+      address(GHO_TOKEN),
+      address(newInterestStrategy)
+    );
+  }
+}

src/contracts/foundry-test/mocks/MockedConfigurator.sol

@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+import {IPool} from '@aave/core-v3/contracts/interfaces/IPool.sol';
+import {DataTypes} from '@aave/core-v3/contracts/protocol/libraries/types/DataTypes.sol';
+
+contract MockedConfigurator {
+  IPool internal _pool;
+
+  event ReserveInterestRateStrategyChanged(
+    address indexed asset,
+    address oldStrategy,
+    address newStrategy
+  );
+
+  constructor(IPool pool) {
+    _pool = pool;
+  }
+
+  function setReserveInterestRateStrategyAddress(
+    address asset,
+    address newRateStrategyAddress
+  ) external {
+    DataTypes.ReserveData memory reserve = _pool.getReserveData(asset);
+    address oldRateStrategyAddress = reserve.interestRateStrategyAddress;
+    _pool.setReserveInterestRateStrategyAddress(asset, newRateStrategyAddress);
+    emit ReserveInterestRateStrategyChanged(asset, oldRateStrategyAddress, newRateStrategyAddress);
+  }
+}

src/contracts/foundry-test/mocks/MockedPool.sol

@@ -17,6 +17,7 @@ import {Helpers} from '@aave/core-v3/contracts/protocol/libraries/helpers/Helper
 import {DataTypes} from '@aave/core-v3/contracts/protocol/libraries/types/DataTypes.sol';
 import {StableDebtToken} from '@aave/core-v3/contracts/protocol/tokenization/StableDebtToken.sol';
 import {IERC20} from '@aave/core-v3/contracts/dependencies/openzeppelin/contracts/ERC20.sol';
+import {Errors} from '@aave/core-v3/contracts/protocol/libraries/helpers/Errors.sol';
 
 /**
  * @dev MockedPool removes assets and users validations from Pool contract.
@@ -96,4 +97,16 @@ contract MockedPool is Pool {
 
     return paybackAmount;
   }
+
+  function setReserveInterestRateStrategyAddress(
+    address asset,
+    address rateStrategyAddress
+  ) external override {
+    require(asset != address(0), Errors.ZERO_ADDRESS_NOT_VALID);
+    _reserves[asset].interestRateStrategyAddress = rateStrategyAddress;
+  }
+
+  function getReserveInterestRateStrategyAddress(address asset) external returns (address) {
+    return _reserves[asset].interestRateStrategyAddress;
+  }
 }