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test: partial withdraw #7

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Nov 3, 2023
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test: partial withdraw #7

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a583221
test: partial withdraw
Schlagonia Nov 3, 2023
bc37334
fix: rounding
Schlagonia Nov 3, 2023
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93 changes: 91 additions & 2 deletions src/test/Operation.t.sol
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Original file line number Diff line number Diff line change
Expand Up @@ -61,6 +61,95 @@ contract OperationTest is Setup {
);
}

function test_partialWithdraw_highLTV(uint256 _amount) public {
vm.assume(_amount > minFuzzAmount && _amount < maxFuzzAmount);

uint256 targetLTV = (strategy.getLiquidateCollateralFactor() *
strategy.targetLTVMultiplier()) / MAX_BPS;
// Deposit into strategy
mintAndDepositIntoStrategy(strategy, user, _amount);

checkStrategyTotals(strategy, _amount, _amount, 0);
assertRelApproxEq(strategy.getCurrentLTV(), targetLTV, 1000);
assertEq(strategy.balanceOfCollateral(), _amount, "collateral");
assertApproxEq(
strategy.balanceOfDebt(),
strategy.balanceOfDepositor(),
3
);
// Earn Interest
skip(1 days);

// Increase LTV
uint256 toBorrow = (strategy.balanceOfCollateral() *
((strategy.getLiquidateCollateralFactor() *
(strategy.targetLTVMultiplier() + 500)) / MAX_BPS)) / 1e18;

toBorrow = _fromUsd(_toUsd(toBorrow, address(asset)), baseToken);

vm.startPrank(address(strategy));
Comet(comet).withdraw(
address(baseToken),
toBorrow - strategy.balanceOfDebt()
);
vm.stopPrank();

assertGt(strategy.getCurrentLTV(), targetLTV);

uint256 balanceBefore = asset.balanceOf(user);

// Withdraw all funds
vm.prank(user);
strategy.redeem(_amount / 2, user, user, 0);

assertGe(
asset.balanceOf(user),
balanceBefore + (_amount / 2),
"!final balance"
);
}

function test_partialWithdraw_lowerLTV(uint256 _amount) public {
vm.assume(_amount > minFuzzAmount && _amount < maxFuzzAmount);

uint256 targetLTV = (strategy.getLiquidateCollateralFactor() *
strategy.targetLTVMultiplier()) / MAX_BPS;
// Deposit into strategy
mintAndDepositIntoStrategy(strategy, user, _amount);

checkStrategyTotals(strategy, _amount, _amount, 0);
assertRelApproxEq(strategy.getCurrentLTV(), targetLTV, 1000);
assertEq(strategy.balanceOfCollateral(), _amount, "collateral");
assertApproxEq(
strategy.balanceOfDebt(),
strategy.balanceOfDepositor(),
3
);
// Earn Interest
skip(1 days);

// lower LTV
uint256 borrowed = strategy.balanceOfDebt();
airdrop(ERC20(baseToken), address(strategy), borrowed / 4);

vm.prank(management);
strategy.manualRepayDebt();

assertLt(strategy.getCurrentLTV(), targetLTV);

uint256 balanceBefore = asset.balanceOf(user);

// Withdraw all funds
vm.prank(user);
strategy.redeem(_amount / 2, user, user, 0);

assertGe(
asset.balanceOf(user),
balanceBefore + (_amount / 2),
"!final balance"
);
}

function test_healthcheck(uint256 _amount) public {
vm.assume(_amount > minFuzzAmount && _amount < maxFuzzAmount);

Expand Down Expand Up @@ -247,7 +336,7 @@ contract OperationTest is Setup {
assertApproxEq(
strategy.balanceOfDebt(),
strategy.balanceOfDepositor(),
2
3
);
// Earn unrealized profit.
skip(1 days);
Expand Down Expand Up @@ -280,7 +369,7 @@ contract OperationTest is Setup {
assertApproxEq(
strategy.balanceOfDebt(),
strategy.balanceOfDepositor(),
2
3
);
// Earn unrealized profit.
skip(1 days);
Expand Down
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