AAA04: expected 1 blank line before Assert block, found none

For tests that have an Assert block, there must be a blank line between the Act and Assert blocks, but Flake8-AAA could not find one.

Prerequisites

This rule works best with pycodestyle’s E303 rule enabled because it ensures that there are not multiple blank lines between the blocks.

def test() -> None:
    x = 3

    result = x**5
    assert result == 243

Add a blank line before the Assert block.

def test() -> None:
    x = 3

    result = x**5

    assert result == 243

This blank line creates separation between the action and the assertions - it makes the Act block easy to spot.