test_fork_transition_excess_blob_gas_at_blob_genesis()

Documentation for tests/cancun/eip4844_blobs/test_excess_blob_gas_fork_transition.py::test_fork_transition_excess_blob_gas_at_blob_genesis@20373115.

Generate fixtures for these test cases for Cancun with:

fill -v tests/cancun/eip4844_blobs/test_excess_blob_gas_fork_transition.py::test_fork_transition_excess_blob_gas_at_blob_genesis --fork Cancun

Test excessBlobGas calculation in the header when the fork is activated.

Also produce enough blocks to test the blob gas price increase when the block is full with SpecHelpers.max_blobs_per_block() blobs.

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

@pytest.mark.valid_at_transition_to("Cancun", subsequent_forks=False)
@pytest.mark.parametrize_by_fork(
    "post_fork_block_count,post_fork_blobs_per_block",
    lambda fork: [
        pytest.param(
            SpecHelpers.get_min_excess_blobs_for_blob_gas_price(
                fork=fork.transitions_to(), blob_gas_price=2
            )
            // (
                fork.transitions_to().max_blobs_per_block()
                - fork.transitions_to().target_blobs_per_block()
            )
            + 2,
            fork.transitions_to().max_blobs_per_block(),
            id="max_blobs",
        ),
        pytest.param(10, 0, id="no_blobs"),
        pytest.param(
            10,
            fork.transitions_to().target_blobs_per_block(),
            id="target_blobs",
        ),
    ],
)
@pytest.mark.eels_base_coverage
def test_fork_transition_excess_blob_gas_at_blob_genesis(
    blockchain_test: BlockchainTestFiller,
    genesis_environment: Environment,
    pre: Alloc,
    pre_fork_blocks: List[Block],
    post_fork_blocks: List[Block],
    post: Mapping[Address, Account],
) -> None:
    """
    Test `excessBlobGas` calculation in the header when the fork is activated.

    Also produce enough blocks to test the blob gas price increase when the
    block is full with `SpecHelpers.max_blobs_per_block()` blobs.
    """
    blockchain_test(
        pre=pre,
        post=post,
        blocks=pre_fork_blocks + post_fork_blocks,
        genesis_environment=genesis_environment,
    )

Parametrized Test Cases

This test generates 3 parametrized test cases across 1 fork.