GitAuto: [FEATURE] Implement Database wrapper

docs/database_wrapper.md

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+# Database Wrapper Documentation
+
+## Overview
+
+The Database Wrapper provides an abstraction layer over the database operations, allowing for simplified and consistent interaction with the database.
+
+## Configuration
+
+The wrapper can be configured using environment variables or a configuration dictionary passed during initialization.
+
+## Usage
+
+1. **Initialization**: Create an instance of the `DatabaseWrapper` with the necessary configuration.
+2. **Connection**: Use the `connect` method to establish a connection to the database.
+3. **Operations**: Execute queries and fetch results using `execute_query` and `fetch_results` methods.
+4. **Disconnection**: Use the `disconnect` method to close the connection.

src/DatabaseWrapper.py

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+class DatabaseWrapperInterface:
+ def connect(self):
+ raise NotImplementedError("Connect method not implemented.")
+
+ def disconnect(self):
+ raise NotImplementedError("Disconnect method not implemented.")
+
+ def execute_query(self, query):
+ raise NotImplementedError("Execute query method not implemented.")
+
+ def fetch_results(self):
+ raise NotImplementedError("Fetch results method not implemented.")
+
+
+class DatabaseWrapper(DatabaseWrapperInterface):
+ def __init__(self, config):
+ self.config = config
+ self.connection = None
+
+ def connect(self):
+ # Implement connection logic using a database library
+ pass
+
+ def disconnect(self):
+ # Implement disconnection logic
+ pass
+
+ def execute_query(self, query):
+ # Implement query execution logic
+ pass
+
+ def fetch_results(self):
+ # Implement results fetching logic
+ pass
+
+ def _handle_error(self, error):
+ # Implement error handling logic
+ pass
+
+ def _manage_transaction(self):
+ # Implement transaction management logic
+ pass
+
+ @staticmethod
+ def from_env():
+ # Create a DatabaseWrapper instance using environment variables
+ pass

tests/test_database_wrapper.py

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+import unittest
+from src.DatabaseWrapper import DatabaseWrapper
+
+class TestDatabaseWrapper(unittest.TestCase):
+ def setUp(self):
+ self.config = {
+ 'host': 'localhost',
+ 'port': 5432,
+ 'user': 'user',
+ 'password': 'password',
+ 'database': 'test_db'
+ }
+ self.wrapper = DatabaseWrapper(self.config)
+
+ def test_connect(self):
+ # Test the connect method
+ self.wrapper.connect()
+ self.assertIsNotNone(self.wrapper.connection)
+
+ def test_disconnect(self):
+ # Test the disconnect method
+ self.wrapper.connect()
+ self.wrapper.disconnect()
+ self.assertIsNone(self.wrapper.connection)
+
+ def test_execute_query(self):
+ # Test the execute_query method
+ self.wrapper.connect()
+ result = self.wrapper.execute_query("SELECT 1")
+ self.assertEqual(result, 1)
+
+ def test_fetch_results(self):
+ # Test the fetch_results method
+ self.wrapper.connect()
+ self.wrapper.execute_query("SELECT 1")
+ results = self.wrapper.fetch_results()
+ self.assertEqual(results, [1])
+
+if __name__ == '__main__':
+ unittest.main()