Basic implementation, can fill in some attributes on the character sheet.

tests/test_stats.py

@@ -0,0 +1,52 @@
+from unittest import TestCase
+
+from dungeonsheets import stats
+
+class TestStats(TestCase):
+
+    def test_modifier(self):
+        ranges = [
+            ((1,), -5),
+            ((2, 3), -4),
+            ((4, 5), -3),
+            ((6, 7), -2),
+            ((8, 9), -1),
+            ((10, 11), 0),
+            ((12, 13), 1),
+            ((14, 15), 2),
+            ((16, 17), 3),
+            ((18, 19), 4),
+            ((20, 21), 5),
+            ((22, 23), 6),
+            ((24, 25), 7),
+            ((26, 27), 8),
+            ((28, 29), 9),
+            ((30,), 10),
+        ]
+        # Test the values for each modifier range
+        stat = stats.Stat()
+        for range_, target in ranges:
+            for value in range_:
+                stat.value = value
+                msg = f"Stat {value} doesn't produce modifier {target} ({stat.modifier})"
+                self.assertEqual(stat.modifier, target, msg)
+
+    def test_modfifier_string(self):
+        stat = stats.Stat()
+        stat.value = 5
+        self.assertEqual(stat.modifier_string, '-3')
+        stat.value = 10
+        self.assertEqual(stat.modifier_string, '0')
+        stat.value = 15
+        self.assertEqual(stat.modifier_string, '+2')
+        
+    def test_setter(self):
+        """Verify that this class works as a data descriptor."""
+        # Set up a dummy class
+        class MyCharacter():
+            stat = stats.Stat()
+        char = MyCharacter()
+        # Check that the stat works as expected once set
+        char.stat = 15
+        self.assertEqual(char.stat.value, 15)
+        self.assertEqual(char.stat.modifier, 2)