feat(#4): greet user by name instead of "World"

AGENTS.md

@@ -2,8 +2,9 @@
 
 ## Project Overview
 
-This is a Python application managed with `uv`. The application prints
-"Hello World" to standard output.
+This is a Python application managed with `uv`. The application greets
+the current user by name (e.g., "Hello Alice"). If the username cannot
+be determined, it falls back to "Hello World".
 
 ## Build and Run
 

README.md

@@ -1,6 +1,7 @@
 # fullsend-python
 
-A demo Python application that prints "Hello World".
+A demo Python application that greets the current user by name. If the
+username cannot be determined, it falls back to "Hello World".
 
 ## Prerequisites
 

docs/requirements.md

@@ -2,7 +2,7 @@
 
 ## Application Requirements
 
-1. The application prints "Hello World" to standard output.
+1. The application greets the current user by name (e.g., "Hello Alice"). If the username cannot be determined, it falls back to "Hello World".
 2. The application is managed using `uv` for dependency and lifecycle management.
 3. Python 3.12 or later is required.
 

pyproject.toml

@@ -15,3 +15,8 @@ build-backend = "hatchling.build"
 
 [tool.hatch.build.targets.wheel]
 packages = ["src/fullsend_python"]
+
+[dependency-groups]
+dev = [
+    "pytest>=9.1.1",
+]

src/fullsend_python/main.py

@@ -1,5 +1,16 @@
-def main():
-    print("Hello World")
+import getpass
+
+
+def get_greeting_name() -> str:
+    """Return the current username, or 'World' if it cannot be determined."""
+    try:
+        return getpass.getuser()
+    except Exception:
+        return "World"
+
+
+def main() -> None:
+    print(f"Hello {get_greeting_name()}")
 
 
 if __name__ == "__main__":

tests/test_main.py

@@ -0,0 +1,25 @@
+from unittest.mock import patch
+
+from fullsend_python.main import get_greeting_name, main
+
+
+def test_get_greeting_name_returns_username():
+    with patch("fullsend_python.main.getpass.getuser", return_value="Alice"):
+        assert get_greeting_name() == "Alice"
+
+
+def test_get_greeting_name_falls_back_to_world():
+    with patch("fullsend_python.main.getpass.getuser", side_effect=Exception):
+        assert get_greeting_name() == "World"
+
+
+def test_main_greets_current_user(capsys):
+    with patch("fullsend_python.main.getpass.getuser", return_value="Alice"):
+        main()
+    assert capsys.readouterr().out.strip() == "Hello Alice"
+
+
+def test_main_falls_back_to_world(capsys):
+    with patch("fullsend_python.main.getpass.getuser", side_effect=Exception):
+        main()
+    assert capsys.readouterr().out.strip() == "Hello World"