Generate Hello World Function

.trae/specs/hello-feature/checklist.md

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+- [x] Hello module structure is created with proper organization
+- [x] Hello function returns "Hello" message when called without parameters
+- [x] Hello function returns personalized greeting when name parameter is provided
+- [x] Error handling is implemented for edge cases
+- [x] Test file exists with comprehensive test coverage
+- [x] All tests pass successfully
+- [x] Code follows project conventions and style guidelines

.trae/specs/hello-feature/spec.md

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+# Hello Feature Spec
+
+## Why
+Implement a basic "hello" feature to demonstrate the spec-driven development workflow and establish a foundation for future features.
+
+## What Changes
+- Add a simple hello functionality that outputs a greeting message
+- Create basic structure for handling greeting requests
+- Implement configurable greeting messages
+
+## Impact
+- Affected specs: None (new feature)
+- Affected code: New greeting module/component
+
+## ADDED Requirements
+### Requirement: Greeting Feature
+The system SHALL provide a hello/greeting functionality that responds with a welcome message.
+
+#### Scenario: Success case
+- **WHEN** user requests a greeting
+- **THEN** system returns a friendly "Hello" message
+
+#### Scenario: Custom greeting
+- **WHEN** user provides a name parameter
+- **THEN** system returns a personalized greeting with the name
+
+## MODIFIED Requirements
+None
+
+## REMOVED Requirements
+None

.trae/specs/hello-feature/tasks.md

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+# Tasks
+- [x] Task 1: Create hello module structure
+  - [x] Subtask 1.1: Create directory structure for hello feature
+  - [x] Subtask 1.2: Add module initialization file
+
+- [x] Task 2: Implement hello functionality
+  - [x] Subtask 2.1: Create hello function that returns greeting message
+  - [x] Subtask 2.2: Add support for optional name parameter
+  - [x] Subtask 2.3: Add basic error handling
+
+- [x] Task 3: Add tests for hello feature
+  - [x] Subtask 3.1: Create test file for hello module
+  - [x] Subtask 3.2: Add test cases for basic greeting
+  - [x] Subtask 3.3: Add test cases for personalized greeting
+
+# Task Dependencies
+- [Task 2] depends on [Task 1]
+- [Task 3] depends on [Task 2]

pycchess/hello.py

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+#! /usr/bin/env python
+# -*- coding: utf-8 -*-
+
+# pycchess - just another chinese chess UI
+# Copyright (C) 2011 - 2015 timebug
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+"""
+The hello module provides basic greeting functionality for the pycchess application.
+
+This module serves as an example module following the project's coding standards
+and licensing requirements.
+"""
+
+
+def hello(name=None):
+    if name is None or not isinstance(name, str) or not name.strip():
+        return "Hello"
+    return "Hello, {}!".format(name.strip())

pycchess/test_hello.py

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+#! /usr/bin/env python
+# -*- coding: utf-8 -*-
+
+# pycchess - just another chinese chess UI
+# Copyright (C) 2011 - 2015 timebug
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+"""
+Test module for the hello functionality.
+
+This module contains unit tests for the hello function.
+"""
+
+from hello import hello
+
+
+def test_hello_no_args():
+    result = hello()
+    assert result == "Hello", "hello() should return 'Hello'"
+
+
+def test_hello_with_name():
+    result = hello("World")
+    assert result == "Hello, World!", "hello('World') should return 'Hello, World!'"
+
+
+def test_hello_empty_string():
+    result = hello("")
+    assert result == "Hello", "hello('') should return 'Hello'"
+
+
+def test_hello_none():
+    result = hello(None)
+    assert result == "Hello", "hello(None) should return 'Hello'"
+
+
+def test_hello_whitespace_only():
+    result = hello("   ")
+    assert result == "Hello", "hello('   ') should return 'Hello'"
+
+
+def test_hello_with_whitespace():
+    result = hello("  Alice  ")
+    assert result == "Hello, Alice!", "hello('  Alice  ') should return 'Hello, Alice!'"
+
+
+if __name__ == "__main__":
+    test_hello_no_args()
+    print("test_hello_no_args passed")
+
+    test_hello_with_name()
+    print("test_hello_with_name passed")
+
+    test_hello_empty_string()
+    print("test_hello_empty_string passed")
+
+    test_hello_none()
+    print("test_hello_none passed")
+
+    test_hello_whitespace_only()
+    print("test_hello_whitespace_only passed")
+
+    test_hello_with_whitespace()
+    print("test_hello_with_whitespace passed")
+
+    print("\nAll tests passed!")