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tests and additional checks #7

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merged 4 commits into from
Mar 23, 2022
Merged

tests and additional checks #7

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3b8dc73
testFuzzExercise()
cranium7811 Mar 23, 2022
de83d91
some more checks
cranium7811 Mar 23, 2022
30d4ea2
balance checks in testFuzzExercise
cranium7811 Mar 23, 2022
4b687b9
additional checks in testFuzzWrite
cranium7811 Mar 23, 2022
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127 changes: 102 additions & 25 deletions src/test/OptionSettlement.t.sol
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Original file line number Diff line number Diff line change
Expand Up @@ -92,6 +92,9 @@ contract OptionSettlementTest is DSTest, NFTreceiver {
// And 10 M WETH
writeTokenBalance(address(this), address(weth), 10000000 * 1e18);

writeTokenBalance(address(engine), address(dai), 1000000000 * 1e18);
writeTokenBalance(address(engine), address(weth), 10000000 * 1e18);

// Issue approvals
IERC20(weth).approve(address(engine), type(uint256).max);
IERC20(dai).approve(address(engine), type(uint256).max);
Expand Down Expand Up @@ -218,10 +221,9 @@ contract OptionSettlementTest is DSTest, NFTreceiver {

function testWrite() public {
uint256 nextTokenId = engine.nextTokenId();
uint256 wethBalance = IERC20(weth).balanceOf(address(engine));
uint256 testWallet = IERC20(weth).balanceOf(
address(0x36273803306a3C22bc848f8Db761e974697ece0d)
);
uint256 wethBalanceEngine = IERC20(weth).balanceOf(address(engine));
uint256 wethFeeTo = IERC20(weth).balanceOf(address(engine.feeTo()));
uint256 wethBalance = IERC20(weth).balanceOf(address(this));

uint256 rxAmount = 10000 * 1 ether;
uint256 fee = ((rxAmount / 10000) * engine.feeBps());
Expand All @@ -237,13 +239,15 @@ contract OptionSettlementTest is DSTest, NFTreceiver {

assertEq(
IERC20(weth).balanceOf(address(engine)),
wethBalance + rxAmount
wethBalanceEngine + rxAmount
);
assertEq(
IERC20(weth).balanceOf(
address(0x36273803306a3C22bc848f8Db761e974697ece0d)
),
testWallet + fee
IERC20(weth).balanceOf(address(engine.feeTo())),
wethFeeTo + fee
);
assertEq(
IERC20(weth).balanceOf(address(this)),
wethBalance - rxAmount - fee
);
assertEq(engine.balanceOf(address(this), 0), 10000);
assertEq(engine.balanceOf(address(this), 1), 1);
Expand All @@ -258,13 +262,20 @@ contract OptionSettlementTest is DSTest, NFTreceiver {
assertTrue(true);
}

function testFuzzWrite(uint16 amount) public {
VM.assume(amount > 0);
VM.assume(amount <= type(uint16).max);

function testFuzzWrite(uint256 amountWrite) public {
uint256 nextTokenId = engine.nextTokenId();
uint256 wethBalanceEngine = IERC20(weth).balanceOf(address(engine));
uint256 wethFeeTo = IERC20(weth).balanceOf(address(engine.feeTo()));
uint256 wethBalance = IERC20(weth).balanceOf(address(this));

engine.write(0, uint256(amount));
VM.assume(amountWrite <= wethBalanceEngine / 1 ether);
VM.assume(amountWrite <= type(uint256).max);
VM.assume(amountWrite > 0);

uint256 rxAmount = amountWrite * 1 ether;
uint256 fee = ((rxAmount / 10000) * engine.feeBps());

engine.write(0, amountWrite);

(
uint256 option,
Expand All @@ -273,14 +284,25 @@ contract OptionSettlementTest is DSTest, NFTreceiver {
bool claimed
) = engine.claim(nextTokenId);

// TODO(Wallet balance checks)
assertEq(
IERC20(weth).balanceOf(address(engine)),
wethBalanceEngine + rxAmount
);
assertEq(
IERC20(weth).balanceOf(address(engine.feeTo())),
wethFeeTo + fee
);
assertEq(
IERC20(weth).balanceOf(address(this)),
wethBalance - rxAmount - fee
);

assertEq(engine.balanceOf(address(this), 0), amount);
assertEq(engine.balanceOf(address(this), 0), amountWrite);
assertEq(engine.balanceOf(address(this), 1), 1);

assertTrue(!claimed);
assertEq(option, 0);
assertEq(amountWritten, amount);
assertEq(amountWritten, amountWrite);
assertEq(amountExercised, 0);
assertEq(engine.nextTokenId(), nextTokenId + 1);

Expand All @@ -291,9 +313,7 @@ contract OptionSettlementTest is DSTest, NFTreceiver {
function testExercise() public {
uint256 wethBalanceEngine = IERC20(weth).balanceOf(address(engine));
uint256 daiBalanceEngine = IERC20(dai).balanceOf(address(engine));
uint256 daiTestWallet = IERC20(dai).balanceOf(
address(0x36273803306a3C22bc848f8Db761e974697ece0d)
);
uint256 daiFeeTo = IERC20(dai).balanceOf(address(engine.feeTo()));

uint256 rxAmount = 10 * 3000 ether;
uint256 txAmount = 10 * 1 ether;
Expand All @@ -307,10 +327,8 @@ contract OptionSettlementTest is DSTest, NFTreceiver {
engine.exercise(0, 10);

assertEq(
IERC20(dai).balanceOf(
address(0x36273803306a3C22bc848f8Db761e974697ece0d)
),
daiTestWallet + fee
IERC20(dai).balanceOf(address(engine.feeTo())),
daiFeeTo + fee
);
assertEq(IERC20(weth).balanceOf(address(engine)), wethBalanceEngine);
assertEq(
Expand All @@ -326,9 +344,68 @@ contract OptionSettlementTest is DSTest, NFTreceiver {
(daiBalance - rxAmount - fee)
);
assertEq(engine.balanceOf(address(this), 0), 0);
assertEq(engine.balanceOf(address(this), 1), 1);
}

function testFuzzExercise(uint256 amountWrite, uint256 amountExercise)
public
{
uint256 wethBalanceEngine = IERC20(weth).balanceOf(address(engine));
uint256 daiBalanceEngine = IERC20(dai).balanceOf(address(engine));
uint256 wethFeeTo = IERC20(weth).balanceOf(address(engine.feeTo()));
uint256 daiFeeTo = IERC20(dai).balanceOf(address(engine.feeTo()));

VM.assume(amountWrite <= wethBalanceEngine / 1 ether);
VM.assume(amountExercise <= daiBalanceEngine / 3000 ether);
VM.assume(amountWrite >= amountExercise);
VM.assume(amountWrite > 0);
VM.assume(amountExercise > 0);
VM.assume(amountWrite <= type(uint256).max);
VM.assume(amountExercise <= type(uint256).max);

uint256 rxAmount = amountExercise * 3000 ether;
uint256 txAmount = amountExercise * 1 ether;
uint256 exerciseFee = (rxAmount / 10000) * engine.feeBps();
uint256 writeFee = ((amountWrite * 1 ether) / 10000) * engine.feeBps();

engine.write(0, amountWrite);

uint256 wethBalance = IERC20(weth).balanceOf(address(this));
uint256 daiBalance = IERC20(dai).balanceOf(address(this));

engine.exercise(0, amountExercise);

assertEq(
IERC20(weth).balanceOf(address(engine.feeTo())),
wethFeeTo + writeFee
);
assertEq(
IERC20(dai).balanceOf(address(engine.feeTo())),
daiFeeTo + exerciseFee
);
assertEq(
IERC20(weth).balanceOf(address(engine)),
wethBalanceEngine + ((amountWrite - amountExercise) * 1 ether)
);
assertEq(
IERC20(dai).balanceOf(address(engine)),
daiBalanceEngine + rxAmount
);
assertEq(
IERC20(weth).balanceOf(address(this)),
(wethBalance + txAmount)
);
assertEq(
IERC20(dai).balanceOf(address(this)),
(daiBalance - rxAmount - exerciseFee)
);
assertEq(
engine.balanceOf(address(this), 0),
amountWrite - amountExercise
);
assertEq(engine.balanceOf(address(this), 1), 1);
}

// TODO(a function to create random new chains for fuzzing)
// TODO(testFuzzExercise)
// TODO(testFuzzRedeem)
}