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✅ Dantalion deploy fuses local allies

CategoryInteraction
StatusPassing
Testtests/test_abilities_complex.py::TestDantalionDeployFusion::test_dantalion_deploy_fuses_local_allies

Dantalion deploys to Lane 0 with two local allies present.

Preconditions​

  • Lane 0: P1's Murmur (ally, fusible)

  • Lane 0: P1's Sabnock (ally, fusible)

  • Lane 1: P1's Duban (NOT local — different lane)

  • Lane 0: P2's Enemy (NOT allied)

Action​

  • Fire DEMON_DEPLOYED for a newly-deployed Dantalion in lane 0
from engine.events import fire_event, GameEvent, EventType

        dantalion = make_demon("106", lane=0, owner=Side.PLAYER_1)
        murmur = make_demon("002", lane=0, owner=Side.PLAYER_1)
        sabnock = make_demon("003", lane=0, owner=Side.PLAYER_1)
        duban = make_demon("001", lane=1, owner=Side.PLAYER_1)  # different lane
        enemy = make_demon("001", lane=0, owner=Side.PLAYER_2)

        state, placed = _make_state_with_demons(dantalion, murmur, sabnock, duban, enemy)
        dantalion_p = placed[0]

        event = GameEvent(
            event_type=EventType.DEMON_DEPLOYED,
            source=dantalion_p,
            target=None,
            value=None,
            side=Side.PLAYER_1,
            lane=0,
        )
        result = fire_event(state, event)

        dantalion_after = next(d for d in result.demons if d.unit_id == "106")

Expected Postconditions​

  • Dantalion is_fused=True, fused_bottom contains both "002" and "003"

  • Duban (different lane) NOT fused

  • Enemy NOT fused

Assertions​

assert dantalion_after.is_fused is True, "Dantalion should be fused after deploy trigger"
        bottoms = set(b.strip() for b in (dantalion_after.fused_bottom or "").split(","))
        assert "002" in bottoms, f"Murmur should be fused. Got bottoms={bottoms}."
        assert "003" in bottoms, f"Sabnock should be fused. Got bottoms={bottoms}."
        assert "001" not in bottoms, f"Duban (different lane) should NOT be fused. Got bottoms={bottoms}."

        # Enemy should still be on field
        enemy_still = [d for d in result.demons if d.unit_id == "001" and d.owner == Side.PLAYER_2]
        assert len(enemy_still) == 1, "Enemy (different owner) must not fuse"