test_invalid_excess_blob_gas_above_target_change()

Documentation for tests/cancun/eip4844_blobs/test_excess_blob_gas.py::test_invalid_excess_blob_gas_above_target_change@2867859a.

Generate fixtures for these test cases for Amsterdam with:

fill -v tests/cancun/eip4844_blobs/test_excess_blob_gas.py::test_invalid_excess_blob_gas_above_target_change --fork Amsterdam

Test rejection of blocks where the excessBlobGas.

• decreases more than BLOB_TARGET_GAS_PER_BLOCK in a single block with zero blobs.
• increases more than BLOB_TARGET_GAS_PER_BLOCK in a single block with max blobs.

Source code in tests/cancun/eip4844_blobs/test_excess_blob_gas.py

@pytest.mark.parametrize_by_fork(
    "header_excess_blobs_delta,parent_blobs",
    generate_invalid_excess_blob_gas_above_target_change_tests,
)
@pytest.mark.parametrize("new_blobs", [1])
@pytest.mark.exception_test
def test_invalid_excess_blob_gas_above_target_change(
    blockchain_test: BlockchainTestFiller,
    env: Environment,
    pre: Mapping[Address, Account],
    blocks: List[Block],
    correct_excess_blob_gas: int,
    header_excess_blob_gas: Optional[int],
) -> None:
    """
    Test rejection of blocks where the `excessBlobGas`.

    - decreases more than `BLOB_TARGET_GAS_PER_BLOCK` in a single block
        with zero blobs.
    - increases more than `BLOB_TARGET_GAS_PER_BLOCK` in a single block
        with max blobs.
    """
    if header_excess_blob_gas is None:
        raise Exception("test case is badly formatted")

    if header_excess_blob_gas == correct_excess_blob_gas:
        raise Exception("invalid test case")

    blockchain_test(
        pre=pre,
        post={},
        blocks=blocks,
        genesis_environment=env,
    )

Parametrized Test Cases

This test generates 2 parametrized test cases across 4 forks.