Explain how you would mock a database connection in a Go application for testing purposes.
- Create an in-memory database for testing.
- Use a real database instance for testing.
- Modify the production database for testing.
- Disable the database connection in the test environment.
To mock a database connection in a Go application for testing purposes, you can create an in-memory database or use a lightweight, isolated database specifically designed for testing. An in-memory database provides a clean slate for each test case, allowing you to simulate database interactions without affecting the production database. Using a real database instance for testing can introduce dependencies and potential data corruption, so it's not recommended. Modifying the production database for testing is unsafe and should be avoided. Disabling the database connection in the test environment doesn't allow you to test database-related functionality accurately.
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