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✅ Purifying flame fusion applies familiar stats

CategoryAbility
StatusPassing
Testtests/test_abilities_familiars.py::test_purifying_flame_fusion_applies_familiar_stats

When Duban fuses with Purifying Flame, the fusion uses Purifying Flame's

Preconditions​

  • Lane 0: P1's Duban (#001) — base HP=6, READIED.

  • Lane 0: P1's Purifying Flame (#102_1) — familiar, fhp=9.

  • Duban is not yet fused.

Action​

  • fuse_demons(state, duban, purifying_flame)
from engine.fusion import fuse_demons

    state = make_game_state()

    duban = make_demon("001", lane=0, owner=Side.PLAYER_1)
    state = place_demon(state, duban)
    duban = state.demons[-1]

    flame = make_familiar_demon("102_1", lane=0, owner=Side.PLAYER_1)
    state = place_demon(state, flame)
    flame = state.demons[-1]

    new_state = fuse_demons(state, duban, flame)

    # Fused demon in state
    fused = next((d for d in new_state.demons if d.unit_id == "001"), None)

Expected Postconditions​

  • Resulting demon has current_hp = 6 (Duban base HP) + 9 (Purifying Flame fhp) = 15.

  • fused_bottom = "102_1".

  • is_fused = True.

  • Purifying Flame removed from field.

Assertions​

assert fused is not None, "Fused Duban should still be on field as top card."
    assert fused.is_fused is True, "Demon should be marked as fused."
    assert fused.fused_bottom == "102_1", f"fused_bottom should be '102_1', got {fused.fused_bottom!r}"

    # HP: Duban base=6, Purifying Flame fhp=9 → 15
    duban_data = UNITS["001"]
    flame_data = FAMILIARS["102_1"]
    expected_hp = duban_data.hp + (flame_data.fhp or 0)
    assert fused.current_hp == expected_hp, (
        f"Fused HP should be {expected_hp} (Duban base {duban_data.hp} + Flame fhp {flame_data.fhp}). "
        f"Got {fused.current_hp}."
    )

    # Purifying Flame removed from field
    flame_on_field = [d for d in new_state.demons if d.unit_id == "102_1"]
    assert len(flame_on_field) == 0, "Purifying Flame (bottom card) should be removed after fusion."