The TwentyOne.t.sol does not pass all tests as the test_Call_PlayerWins reverts.
test_Call_PlayerWins reverts as the contract is trying to send 2ETH to the player but only has the 1ETH initial deposit from the player.
reverting / incomplete test.
manual review - running forge test
add vm.deal(address(twentyOne), 1); to setUp() function.
note - expect this is supposed fail is on purpose as a hint at the more severe vulnerability possibly..
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