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test_blake2_precompile_delegatecall()

Documentation for tests/istanbul/eip152_blake2/test_blake2_delegatecall.py::test_blake2_precompile_delegatecall@7b8124a7.

Generate fixtures for these test cases for Osaka with:

fill -v tests/istanbul/eip152_blake2/test_blake2_delegatecall.py::test_blake2_precompile_delegatecall --fork Osaka

Test delegatecall consumes specified gas for the Blake2B precompile when it exists.

Source code in tests/istanbul/eip152_blake2/test_blake2_delegatecall.py 
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@pytest.mark.valid_from("ConstantinopleFix")
def test_blake2_precompile_delegatecall(
    state_test: StateTestFiller, pre: Alloc, fork: Fork
) -> None:
    """
    Test delegatecall consumes specified gas for the Blake2B precompile when it
    exists.
    """
    env = Environment()

    account = pre.deploy_contract(
        Op.SSTORE(
            0,
            Op.DELEGATECALL(
                gas=1,
                address=Spec.BLAKE2_PRECOMPILE_ADDRESS,
            ),
        )
        + Op.STOP,
        storage={0: 0xDEADBEEF},
    )

    tx = Transaction(
        to=account,
        sender=pre.fund_eoa(),
        gas_limit=90_000,
        protected=True,
    )

    # If precompile exists, DELEGATECALL will fail, otherwise DELEGATECALL will
    # succeed
    post = {
        account: Account(
            storage={
                0: "0x00" if fork >= Istanbul else "0x01",
            }
        )
    }

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

Parametrized Test Cases

This test generates 1 parametrized test case across 9 forks.