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test_tload_after_sstore()

Documentation for tests/cancun/eip1153_tstore/test_tstorage.py::test_tload_after_sstore@[email protected].

Generate fixtures for these test cases for Cancun with:

Cancun only: 

fill -v tests/cancun/eip1153_tstore/test_tstorage.py::test_tload_after_sstore --fork=Cancun --evm-bin=/path/to/evm-tool-dev-version

For all forks up to and including Cancun: 

fill -v tests/cancun/eip1153_tstore/test_tstorage.py::test_tload_after_sstore --until=Cancun

Loading after storing returns the stored value: TSTORE(x, y), TLOAD(x) returns y.

Based on ethereum/tests/.../18_tloadAfterStoreFiller.yml", # noqa: E501

Source code in tests/cancun/eip1153_tstore/test_tstorage.py 
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def test_tload_after_sstore(state_test: StateTestFiller, pre: Alloc):
    """
    Loading after storing returns the stored value: TSTORE(x, y), TLOAD(x)
    returns y.

    Based on [ethereum/tests/.../18_tloadAfterStoreFiller.yml](https://github.com/ethereum/tests/blob/9b00b68593f5869eb51a6659e1cc983e875e616b/src/EIPTestsFiller/StateTests/stEIP1153-transientStorage/18_tloadAfterStoreFiller.yml)",  # noqa: E501
    """
    env = Environment()

    slots_under_test = [1, 3, 2**128, 2**256 - 1]
    code = sum(
        Op.SSTORE(slot - 1, 0xFF) + Op.SSTORE(slot, Op.TLOAD(slot - 1))
        for slot in slots_under_test
    )
    code_address = pre.deploy_contract(
        code=code,  # type: ignore
        storage={slot: 1 for slot in slots_under_test},
    )

    tx = Transaction(
        sender=pre.fund_eoa(),
        to=code_address,
        gas_limit=1_000_000,
    )

    post = {
        code_address: Account(
            code=code,
            storage={slot - 1: 0xFF for slot in slots_under_test}
            | {slot: 0 for slot in slots_under_test},
        )
    }

    state_test(
        env=env,
        pre=pre,
        post=post,
        tx=tx,
    )