You have been given a legacy Go codebase to maintain with no existing tests. Describe how you would go about creating a test suite to ensure the codebase's functionality.
- Create unit tests for individual functions and methods.
- Start with end-to-end tests to verify overall functionality.
- Use test doubles such as mocks and stubs to isolate dependencies.
- Use property-based testing for thorough coverage.
When dealing with a legacy codebase without existing tests, the best approach is to start by creating unit tests for individual functions and methods. This allows you to isolate and test specific pieces of code in isolation. Once you have a solid base of unit tests, you can gradually introduce integration tests and end-to-end tests as needed. Using test doubles like mocks and stubs can help isolate dependencies, and property-based testing can be beneficial, but it's usually not the initial step in creating tests for a legacy codebase.
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