test_invalid_excess_blob_gas_target_blobs_increase_from_zero()

Documentation for tests/cancun/eip4844_blobs/test_excess_blob_gas.py::test_invalid_excess_blob_gas_target_blobs_increase_from_zero@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_target_blobs_increase_from_zero --fork Amsterdam

Test rejection of blocks where the excessBlobGas increases from zero, even when the included blobs are on or below target.

Test is parametrized according to [0, TARGET_BLOBS_PER_BLOCK new blobs.

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

@pytest.mark.parametrize_by_fork(
    "header_excess_blobs_delta",
    lambda fork: range(1, fork.max_blobs_per_block()),
)
@pytest.mark.parametrize_by_fork(
    "parent_blobs",
    lambda fork: range(0, fork.target_blobs_per_block() + 1),
)
@pytest.mark.parametrize("parent_excess_blobs", [0])  # Start at 0
@pytest.mark.parametrize("new_blobs", [1])
@pytest.mark.exception_test
def test_invalid_excess_blob_gas_target_blobs_increase_from_zero(
    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` increases from zero,
    even when the included blobs are on or below target.

    Test is parametrized according to `[0, TARGET_BLOBS_PER_BLOCK` new 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 300 parametrized test cases across 4 forks.