Describe a scenario where mocking is essential for accurately testing a component in Go.
- Testing HTTP request handling.
- Testing error handling.
- Testing a function that computes complex business logic.
- Testing a function that reads a configuration file.
Mocking is essential when testing components in Go that involve external dependencies, such as HTTP requests. Mocking allows you to simulate external services' behavior, ensuring that your tests focus solely on the code you want to evaluate without relying on real external services, which can be slow, unreliable, or require setup and teardown processes. This ensures that your tests are isolated and repeatable.
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