Added tests, fix README.

tests/test_economy_pure.py

@@ -0,0 +1,86 @@
+"""Tests for the pure (no-database) economy math."""
+
+import random
+from datetime import timedelta
+
+from core import economy
+
+
+class TestLevels:
+    def test_milestones(self):
+        assert economy.get_level(0) == 1
+        assert economy.get_level(249) == 4
+        assert economy.get_level(250) == 5
+        assert economy.get_level(1000) == 10
+        assert economy.get_level(4000) == 20
+        assert economy.get_level(9000) == 30
+
+    def test_exp_for_level_is_inverse(self):
+        for level in range(1, 41):
+            exp = economy.exp_for_level(level)
+            assert economy.get_level(exp) == level
+            if level > 1:
+                assert economy.get_level(exp - 1) == level - 1
+
+    def test_negative_exp_clamps_to_level_1(self):
+        assert economy.get_level(-500) == 1
+
+    def test_role_names(self):
+        assert economy.level_role_name(1) == "TipiNOOB"
+        assert economy.level_role_name(4) == "TipiNOOB"
+        assert economy.level_role_name(5) == "TipiGRINDER"
+        assert economy.level_role_name(10) == "TipiHUSTLER"
+        assert economy.level_role_name(20) == "TipiCHAD"
+        assert economy.level_role_name(30) == "TipiLEGEND"
+        assert economy.level_role_name(99) == "TipiLEGEND"
+
+
+class TestGambleExp:
+    def test_tiers(self):
+        assert economy.gamble_exp(0) == 0
+        assert economy.gamble_exp(9) == 0
+        assert economy.gamble_exp(10) == 5
+        assert economy.gamble_exp(99) == 5
+        assert economy.gamble_exp(100) == 10
+        assert economy.gamble_exp(999) == 10
+        assert economy.gamble_exp(1_000) == 15
+        assert economy.gamble_exp(9_999) == 15
+        assert economy.gamble_exp(10_000) == 20
+        assert economy.gamble_exp(99_999) == 20
+        assert economy.gamble_exp(100_000) == 25
+
+    def test_cap(self):
+        assert economy.gamble_exp(10_000_000) == 25
+
+
+class TestFormatTd:
+    def test_hours(self):
+        assert economy.format_td(timedelta(hours=1, minutes=23, seconds=45)) == "1t 23m"
+
+    def test_minutes(self):
+        assert economy.format_td(timedelta(minutes=45, seconds=12)) == "45m 12s"
+
+    def test_seconds(self):
+        assert economy.format_td(timedelta(seconds=8)) == "8s"
+
+
+class TestRollFish:
+    def test_rolls_are_valid(self):
+        random.seed(42)
+        for _ in range(500):
+            fish_id, weight = economy.roll_fish()
+            if fish_id == "junk":
+                assert weight == 0
+            else:
+                fish = economy.FISH_CATALOGUE[fish_id]
+                assert fish["weight"][0] <= weight <= fish["weight"][1]
+
+    def test_rarity_bump_shifts_every_catch_up_a_tier(self):
+        random.seed(7)
+        rarities = {
+            economy.FISH_CATALOGUE[fid]["rarity"]
+            for fid, _ in (economy.roll_fish(rarity_bump=True) for _ in range(1000))
+            if fid != "junk"
+        }
+        assert "common" not in rarities
+        assert "legendary" in rarities