test: add tests

tests/calculate/test_world_step.py

@@ -0,0 +1,22 @@
+from decimal import Decimal
+
+from arcaea_offline.calculate.world_step import (
+    AwakenedAyuPartnerBonus,
+    LegacyMapStepBooster,
+    PlayResult,
+    calculate_step_original,
+)
+
+
+def test_world_step():
+    # the result was copied from https://arcaea.fandom.com/wiki/World_Mode_Mechanics#Calculation
+    # CC BY-SA 3.0
+
+    booster = LegacyMapStepBooster(6, 250)
+    partner_bonus = AwakenedAyuPartnerBonus("+3.6")
+    play_result = PlayResult(play_rating=Decimal("11.299"), partner_step=92)
+    result = calculate_step_original(
+        play_result, partner_bonus=partner_bonus, step_booster=booster
+    )
+
+    assert result.quantize(Decimal("0.000")) == Decimal("175.149")