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✅ Berith gains pwr and ap cost on enemy action

CategoryAbility
StatusPassing
Testtests/test_abilities_passive.py::test_berith_gains_pwr_and_ap_cost_on_enemy_action

When an enemy demon resolves an action, Berith gains +1 PWR and

Preconditions​

  • Lane 0: P1's Berith (#070, base PWR=4) — READIED

  • P2's Duban (#001) resolves an action (ABILITY_USED fires, side=P2)

  • No status effects on Berith

Action​

  • Fire ABILITY_USED event with source=Duban, side=PLAYER_2
from engine.events import GameEvent, EventType, fire_event
    from engine.operations import get_effective_pwr
    from engine.status_effects import get_stat_modifier

    state = make_game_state()
    berith = make_demon("070", lane=0, owner=Side.PLAYER_1)
    duban = make_demon("001", lane=1, owner=Side.PLAYER_2)
    state = place_demon(state, berith)
    state = place_demon(state, duban)

    berith_on_field = next(d for d in state.demons if d.unit_id == "070")
    duban_on_field = next(d for d in state.demons if d.unit_id == "001")

    event = GameEvent(
        event_type=EventType.ABILITY_USED,
        source=duban_on_field,
        target=None,
        value=0,
        side=Side.PLAYER_2,
        lane=1,
    )
    new_state = fire_event(state, event)

    berith_after = next(d for d in new_state.demons if d.unit_id == "070")
    pwr = get_effective_pwr(new_state, berith_after)
    ap_mod = get_stat_modifier(new_state, berith_after, "ap_cost")

Expected Postconditions​

  • Berith effective PWR = 4 (base) + 1 (status) = 5

  • Berith ap_cost modifier = -1

  • abilities_used_this_turn["0"] == 1 (first stack used)

Assertions​

assert pwr == 5, f"Berith PWR = 4 base + 1 status = 5. Got {pwr}"
    assert ap_mod == -1, f"Berith ap_cost mod = -1 from status. Got {ap_mod}"
    assert berith_after.abilities_used_this_turn.get("0", 0) == 1, (
        f"Stack counter should be 1 after one enemy action. "
        f"Got {berith_after.abilities_used_this_turn.get('0', 0)}."
    )