4 files changed, 31 insertions(+), 4 deletions(-)

M README.md
M src/hello_hut/cli.py
M src/hello_hut/greetings.py
M tests/test_greetings.py

@@ 21,6 21,8 @@ $ hello-hut Ada
 Hello, Ada!
 $ hello-hut Ada --shout
 HELLO, ADA!
+$ hello-hut --time-of-day Grace
+Good evening, Grace!
 ```
 
 ## License

@@ 4,7 4,7 @@ import argparse
 import sys
 
 from . import __version__
-from .greetings import DEFAULT_NAME, greet
+from .greetings import DEFAULT_NAME, greet, time_of_day_greeting
 
 
 def build_parser():


@@ 15,6 15,8 @@ def build_parser():
     parser.add_argument("name", nargs="?", help="who to greet")
     parser.add_argument("--shout", action="store_true",
                         help="print the greeting in capitals")
+    parser.add_argument("--time-of-day", action="store_true",
+                        help="say good morning, afternoon or evening")
     parser.add_argument("--version", action="version",
                         version=f"%(prog)s {__version__}")
     return parser


@@ 25,6 27,7 @@ def main(argv=None):
     name = args.name or DEFAULT_NAME
     shout = args.shout
 
-    message = greet(name, shout=shout)
+    salutation = time_of_day_greeting() if args.time_of_day else None
+    message = greet(name, shout=shout, salutation=salutation)
     print(message)
     return 0

@@ 1,10 1,23 @@
 """Greeting construction: pure functions with no I/O, easy to test."""
 
+import datetime
+
 DEFAULT_NAME = "friend"
 
 
-def greet(name=DEFAULT_NAME, shout=False):
+def time_of_day_greeting(now=None):
+    """Return a salutation that matches the local time of day."""
+    hour = (now or datetime.datetime.now()).hour
+    if 5 <= hour < 12:
+        return "Good morning"
+    if 12 <= hour < 18:
+        return "Good afternoon"
+    return "Good evening"
+
+
+def greet(name=DEFAULT_NAME, shout=False, salutation=None):
     """Build a greeting such as "Hello, Ada!"."""
-    salutation = "Hello"
+    if salutation is None:
+        salutation = "Hello"
     message = f"{salutation}, {name}!"
     return message.upper() if shout else message

@@ 1,6 1,8 @@
 import unittest
+from datetime import datetime
 
 from hello_hut.greetings import greet
+from hello_hut.greetings import time_of_day_greeting
 
 
 class GreetTest(unittest.TestCase):


@@ 16,6 18,13 @@ class GreetTest(unittest.TestCase):
     def test_shout_keeps_accents(self):
         self.assertEqual(greet("Zoë", shout=True), "HELLO, ZOË!")
 
+    def test_time_of_day(self):
+        def at(hour):
+            return datetime(2026, 1, 1, hour)
+        self.assertEqual(time_of_day_greeting(at(8)), "Good morning")
+        self.assertEqual(time_of_day_greeting(at(13)), "Good afternoon")
+        self.assertEqual(time_of_day_greeting(at(21)), "Good evening")
+
 
 if __name__ == "__main__":
     unittest.main()