Testing Contract: Transaction has been reverted by the EVM

Question

I am writing a testing file for my coin flip project here is the beginning of the coin flip project:

contract CoinFlip {

address payable player;

address payable casino;
uint256 public casinoDeposit;
uint256 betAmount;
uint256 maxBet = .001 ether;
bytes32 commitHash;
uint gameTimeOut;
uint256  matchBetTimeOut;
uint256 revealTimeOut;
uint256 result;
bool win;
address payable contractAddress = address(this);

constructor () public payable{
    require(msg.value == 1 ether);
    casinoDeposit = msg.value;
}

Here is the testing file:

contract CoinFlipTest { CoinFlip v;

function beforeAll() public {
    // create a new instance of Value contract
    v = new CoinFlip();
}

Every time I try to run the testing file I get this error. I would appreciate some help on what I am doing wrong: ✘ Before all Error Message: "Transaction has been reverted by the EVM: { "transactionHash": "0x0e839950a7737797d4c9fca76adb24d1ec0ff7d07b3b87eea5c3a8487d123043", "transactionIndex": 0, "blockHash": "0x9cc0f6017494c03c53ebbe39aef033623ed7f6e6937c6d376b7c3a0d78392b86", "blockNumber": 8, "gasUsed": 5000000, "cumulativeGasUsed": 5000000, "status": false, "to": "0xd2a5bC10698FD955D1Fe6cb468a17809A08fd005", "events": {} }"

Answer 1

First of all in contract CoinFlip you need to have the following method in order to allow the incoming ether transfers:

receive() external payable {}

Secondly method beforeAll in contract CoinFlipTest is failing, because when you are creating the instance of contract CoinFlip you're not passing ethers to it and you have the following condition in the constructor which cause the error: require(msg.value == 1 ether); which says you have to pass exactly one ether when creating instance of this contract. You need to replace:

v = new CoinFlip();

With:

v = new CoinFlip{value: 1 ether}();