Solidity pseudo random generator, for testing purposes

PseudoRandom.sol

contract PseudoRandom {
    function abiEncode(string memory stringInput) public view returns (bytes memory) {
        return abi.encode(stringInput, msg.sender, block.timestamp);
    }
    
    function kHash(bytes memory bytesInput) public pure returns (uint) {
        return uint(keccak256(bytesInput));
    }
    
    function random(string memory input, uint arrayLength) public view returns (uint) {
        bytes memory abiEncodeOutput = abiEncode(input);
        uint kHashOutput = kHash(abiEncodeOutput);
        return kHashOutput % arrayLength;
    }
}