fix(stats): non-attack damage now lands in damage_taken - bleed ticks, recurring spell damage (Acid Arrow) and cure-spells-damage-undead (SRD Cure Light Wounds negative-energy hit, attributed to the caster's damage_dealt) were invisible to attrition while attacks were counted; transcripts and RNG untouched

tests/test_recurring_damage.py

@@ -244,3 +244,23 @@ class TestRecurringSnapshot:
         assert entry["recurring_damage"] == [
             {"formula": "2d4", "types": ("acid",), "rounds_left": 2}
         ]
+
+
+class TestRecurringTicksRecordDamageTaken:
+    """Given: a target burning from Acid Arrow
+    When: each recurring tick lands
+    Then: attrition's damage_taken grows by the tick (README "dégâts subis");
+    the initial spell hit was already counted at cast time."""
+
+    def test_each_tick_counts_as_damage_taken(self) -> None:
+        caster = _caster(level=3)
+        victim = _victim(hp_max=200)
+        # attack (15) + initial 2d4 (3+3) + tick1 2d4 (2+2) + tick2 2d4 (4+4)
+        engine, c, v = _engine(caster, victim, [15, 3, 3, 2, 2, 4, 4])
+        engine._cast_spell(c, v, "Acid Arrow")
+        assert engine._stats["victim"].damage_taken == 6
+        assert engine._stats["caster"].damage_dealt == 6
+        engine._apply_recurring_damage(v)
+        assert engine._stats["victim"].damage_taken == 10
+        engine._apply_recurring_damage(v)
+        assert engine._stats["victim"].damage_taken == 18