function setUp() public virtual {
//vm.chainId(4);
dai = new Dai(4);
vm.label(address(dai), "dai contract");
weth = new WETH9();
vm.label(address(weth), "weth contract");
priceFeed = new MockV3Aggregator(18, 386372840000000);
vm.label(address(priceFeed), "priceFeed contract");
deployer = 0xb4c79daB8f259C7Aee6E5b2Aa729821864227e84;
vm.label(deployer, "deployer");
user = address(1);
vm.label(user, "user");
console2.log
function testVaultHasDAI() public {
console2.log("Check Vault has 100 DAI on deployment");
uint vaultDAI = dai.balanceOf(address(vault));
assertTrue(vaultDAI == 10000*10**18);
}