create tests for solidity special functions

[mayconamaroCW]

Implement testes for some or all of the Solidity functions/properties below:

• blockhash(uint blockNumber) returns (bytes32): hash of the given block - only works for 256 most recent blocks

• block.basefee (uint): current block’s base fee (EIP-3198 and EIP-1559)

• block.chainid (uint): current chain id

• block.coinbase (address payable): current block miner’s address

• block.difficulty (uint): current block difficulty (EVM < Paris). For other EVM versions it behaves as a deprecated alias for block.prevrandao that will be removed in the next breaking release

• block.gaslimit (uint): current block gaslimit

• block.number (uint): current block number

• block.timestamp (uint): current block timestamp in seconds since Unix epoch

• gasleft() returns (uint256): remaining gas

• msg.data (bytes): complete calldata

• msg.sender (address): sender of the message (current call)

• msg.sig (bytes4): first four bytes of the calldata (i.e. function identifier)

• msg.value (uint): number of wei sent with the message

• tx.gasprice (uint): gas price of the transaction

• tx.origin (address): sender of the transaction (full call chain)

Eventually some of them might be missing implementation, which needs to be addresses as a new enhacement issue