Initial commit: Add helloworld.py with tests and GitHub Actions workflow

- Added helloworld.py with hello_world() and greet() functions
- Added tests directory with test_helloworld.py containing pytest tests
- Added .github/workflows/python-ci.yml for GitHub Actions CI workflow
- Updated README.md with project documentation

Author: zhongwen666

.github/workflows/python-ci.yml

@@ -0,0 +1,28 @@
+name: Python CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Set up Python
+      uses: actions/setup-python@v4
+      with:
+        python-version: '3.9'
+
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install pytest
+
+    - name: Run tests
+      run: |
+        python -m pytest tests/ -v

README.md

@@ -1,2 +1,36 @@
 # test-action
+
 Test Github Actions
+
+## Project Structure
+
+This is a simple Python project with a Hello World function and associated tests to demonstrate GitHub Actions CI/CD workflow.
+
+## Files
+
+- `helloworld.py`: Contains simple greeting functions
+- `tests/test_helloworld.py`: Pytest tests for the greeting functions
+- `.github/workflows/python-ci.yml`: GitHub Actions workflow for running tests
+
+## Functions
+
+- `hello_world()`: Returns "Hello, World!"
+- `greet(name)`: Returns a personalized greeting "Hello, {name}!"
+
+## Running Tests Locally
+
+To run the tests locally:
+
+1. Install pytest:
+   ```
+   pip install pytest
+   ```
+
+2. Run the tests:
+   ```
+   python -m pytest tests/ -v
+   ```
+
+## GitHub Actions
+
+This repository uses GitHub Actions to automatically run tests on every push and pull request to the main branch.

helloworld.py

@@ -0,0 +1,12 @@
+def hello_world():
+    """Return the classic 'Hello, World!' string."""
+    return "Hello, World!"
+
+
+def greet(name):
+    """Return a personalized greeting."""
+    return f"Hello, {name}!"
+
+
+if __name__ == "__main__":
+    print(hello_world())

tests/test_helloworld.py

@@ -0,0 +1,18 @@
+import pytest
+from helloworld import hello_world, greet
+
+
+def test_hello_world():
+    """Test the hello_world function returns the correct string."""
+    assert hello_world() == "Hello, World!"
+
+
+def test_greet():
+    """Test the greet function returns a personalized greeting."""
+    assert greet("Alice") == "Hello, Alice!"
+    assert greet("Bob") == "Hello, Bob!"
+
+
+def test_greet_empty_string():
+    """Test the greet function with an empty string."""
+    assert greet("") == "Hello, !"