fix: count days in duration parser

README.md

@@ -8,6 +8,7 @@ A tiny, dependency-free parser for human-friendly duration strings.
 from duration_utils import parse_duration
 
 parse_duration("1h30m")   # 5400
+parse_duration("2d4h")    # 187200
 parse_duration("1w")      # 604800
 ```
 

duration_utils.py

@@ -4,9 +4,10 @@
 
 import re
 
-# Seconds per unit. Supported: weeks, hours, minutes, seconds.
+# Seconds per unit. Supported: weeks, days, hours, minutes, seconds.
 _UNITS = {
     "w": 604800,
+    "d": 86400,
     "h": 3600,
     "m": 60,
     "s": 1,
@@ -20,6 +21,7 @@ def parse_duration(text: str) -> int:
 
     Examples:
         parse_duration("1h30m") -> 5400
+        parse_duration("2d4h")  -> 187200
         parse_duration("1w")    -> 604800
 
     Raises ValueError on empty or malformed input.

tests/test_duration_utils.py

@@ -16,9 +16,18 @@ def test_seconds(self):
     def test_weeks(self):
         self.assertEqual(parse_duration("1w"), 604800)
 
+    def test_days(self):
+        self.assertEqual(parse_duration("1d"), 86400)
+
     def test_combined(self):
         self.assertEqual(parse_duration("1h30m"), 5400)
 
+    def test_days_combined_with_hours(self):
+        self.assertEqual(parse_duration("2d4h"), 187200)
+
+    def test_all_supported_units_combined(self):
+        self.assertEqual(parse_duration("1w2d3h4m5s"), 788645)
+
     def test_invalid_raises(self):
         with self.assertRaises(ValueError):
             parse_duration("abc")