In Python DevOps, how do I write integration tests?

In Python DevOps, integration tests are crucial to ensure that different modules or services work together as expected. Integration testing typically involves testing interactions between multiple components, such as databases, APIs, and third-party services. Here’s a simple approach to writing integration tests using the `unittest` framework along with `unittest.mock` for mocking dependencies.

import unittest from unittest.mock import patch # Sample function that integrates with a database def fetch_data_from_db(db_connection): query = "SELECT * FROM users" cursor = db_connection.cursor() cursor.execute(query) return cursor.fetchall() # Test case for the fetch_data_from_db function class TestDatabaseConnection(unittest.TestCase): @patch('path.to.your.database.module.db_connection') def test_fetch_data_from_db(self, mock_db_connection): mock_cursor = mock_db_connection.cursor.return_value mock_cursor.fetchall.return_value = [('Alice', 28), ('Bob', 25)] result = fetch_data_from_db(mock_db_connection) self.assertEqual(result, [('Alice', 28), ('Bob', 25)]) if __name__ == '__main__': unittest.main()

Python DevOps integration tests unittest unittest.mock database testing

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