From 0d7e47dd699ba8bfc9bc230da1e22a44abd7a0fb Mon Sep 17 00:00:00 2001
From: James Xian <james.xian@metabit-trading.com>
Date: Sat, 28 Mar 2026 13:18:24 +0800
Subject: [PATCH] feat(greet): step 1 - add greet module with unit tests

---
 src/testbed/greet.py |  5 +++++
 tests/test_greet.py  | 15 +++++++++++++++
 2 files changed, 20 insertions(+)
 create mode 100644 src/testbed/greet.py
 create mode 100644 tests/test_greet.py

diff --git a/src/testbed/greet.py b/src/testbed/greet.py
new file mode 100644
index 0000000..5cfb68d
--- /dev/null
+++ b/src/testbed/greet.py
@@ -0,0 +1,5 @@
+"""Greet greeting module."""
+
+
+def greet(name: str) -> str:
+    return f"Hello, {name}!"
diff --git a/tests/test_greet.py b/tests/test_greet.py
new file mode 100644
index 0000000..3a0ded6
--- /dev/null
+++ b/tests/test_greet.py
@@ -0,0 +1,15 @@
+"""Unit tests for greet module."""
+
+from testbed.greet import greet
+
+
+class TestGreet:
+    def test_importable(self) -> None:
+        """greet function is importable from testbed.greet."""
+        assert callable(greet)
+
+    def test_basic_greeting(self) -> None:
+        assert greet("World") == "Hello, World!"
+
+    def test_empty_string(self) -> None:
+        assert greet("") == "Hello, !"