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Prevrandao.t.sol
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Prevrandao.t.sol
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// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity 0.8.18;
import "ds-test/test.sol";
import "cheats/Vm.sol";
contract PrevrandaoTest is DSTest {
Vm constant vm = Vm(HEVM_ADDRESS);
function testPrevrandao() public {
assertEq(block.prevrandao, 0);
vm.prevrandao(uint256(10));
assertEq(block.prevrandao, 10, "prevrandao cheatcode failed");
}
function testPrevrandaoFuzzed(uint256 newPrevrandao) public {
vm.assume(newPrevrandao != block.prevrandao);
assertEq(block.prevrandao, 0);
vm.prevrandao(newPrevrandao);
assertEq(block.prevrandao, newPrevrandao);
}
function testPrevrandaoSnapshotFuzzed(uint256 newPrevrandao) public {
vm.assume(newPrevrandao != block.prevrandao);
uint256 oldPrevrandao = block.prevrandao;
uint256 snapshot = vm.snapshot();
vm.prevrandao(newPrevrandao);
assertEq(block.prevrandao, newPrevrandao);
assert(vm.revertTo(snapshot));
assertEq(block.prevrandao, oldPrevrandao);
}
}