Benefits of the Dependency Inversion Principle

Key benefits

Here are the key benefits of using the dependency inversion principle:

1. Loose coupling between the classes because a class is only concerned about its own functionality and not the inner functionality of another class. This allows us to modify one class without affecting the behavior of another class.

2. We can swap implementations if we need to. For example, we can have another implementation of IFileProcessor that uses cloud storage instead of our own hard drive. The class using this interface will automatically work with the new implementation because its dependency doesn’t need to be modified.

3. We can mock up the interface in our unit tests to return specific output to facilitate each scenario. This way, we’ll be testing only the logic inside a specific class and not in any of its dependencies.