How can I effectively test my code with dependency injection?

How can I effectively test my code with dependency injection?

Dependency injection (DI) allows you to inject dependencies into your classes, making them easier to test. You can use mocks or stubs for the dependencies during testing.

Can you give me an example of how to implement this in a unit test?

Sure! If you're using a testing framework like JUnit, you can create a mock of the dependency and inject it into the class you're testing. Here's a simple example...

What libraries do you recommend for mocking dependencies?

Popular libraries include Mockito for Java, Moq for .NET, and unittest.mock for Python. They all provide great support for creating mocks.

Are there any common pitfalls to avoid when using dependency injection?

Yes, some common pitfalls include overusing DI, which can lead to complex code, and not properly managing the lifecycle of dependencies.