What is Dependency Inversion?

Dependency Inversion is the idea that high-level logic should not depend on its low-level implementations. Business logic in our application should not care about whether we get data from an AWS bucket or Google Cloud Storage; we should be able to easily swap these implementations without our program breaking. This makes our code stable against change. We can also make our application testable by swapping these dependencies for implementations that are easier to test.

How is this done in Go?

In Go, interfaces enable us to use dependency inversion. We are able to use different implementations in our code, as long as they satisfy the interface we have defined. We use dependency injection to tell the application which implementation to use.

#go #software-development #golang