Contract methods in tests do not work the same way as in blockchain

[nikitaghost]

Test contract:

pragma ton-solidity ^0.58.1;
pragma AbiHeader expire;
pragma AbiHeader pubkey;

contract Test {

    constructor() public {
        tvm.accept();
    }

    function foo() public view {
        require(msg.value > 1 ever);
        tvm.rawReserve(0, 4);

        msg.sender.transfer({value: 0, flag: 128});

        msg.sender.transfer({value: 0.3 ever, flag: 0});
        msg.sender.transfer({value: 0.3 ever, flag: 0});
    }    

}

In the blockchain, its foo method will be executed without errors:

As we see the contract balance after the deposit = 0.3 ever. Following from this, we can say that, theoretically, the transfer of 2 transactions after the payment of the change is impossible because the amount of transactions is greater than the reserved balance of the contract.

But in tests, the call to the foo method does not pass and falls into an error:

test.py:

from tonos_ts4 import ts4

eq = ts4.eq

ts4.init('../build', verbose = True)

def deploy_setcodemultisig():
    keypair = ts4.make_keypair()
    setcode = ts4.BaseContract('SetcodeMultisigWallet', ctor_params={'owners': [keypair[1]], 'reqConfirms': 1}, keypair=keypair)
    return setcode

def deploy_test():
    test = ts4.BaseContract('Test', ctor_params = {}, balance=300000000)
    return test

def test_contract(setcode, test):
    payload = ts4.encode_message_body('Test', 'foo', params={})
    setcode.call_method_signed('sendTransaction', {'dest': test.address, 'value': 1100000000, 'bounce': False, 'flags': 0, 'payload': payload}, expect_ec = 0)
    ts4.dispatch_messages()

setcode = deploy_setcodemultisig()
test = deploy_test()
test_contract(setcode, test)