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test_call_delegatecall.sol

pragma solidity ^0.4.17;

library SomeLib {
    event calledSomeLib(address _from);
    function calledSomeLibFun() public{
        calledSomeLib(address(this));
    }
}
contract SomeContract{
    event callMeMaybeEvent(address _from);
    function callMeMaybe() payable public {
        callMeMaybeEvent(address(this));
    }
}

contract ThatCallsSomeContract{
    function callTheOtherContract(address _contractAddress) public{
        require(_contractAddress.call(bytes4(keccak256("callMeMaybe()"))));
        require(_contractAddress.delegatecall(bytes4(keccak256("callMeMaybe()"))));
        SomeLib.calledSomeLibFun();
    }
}