Mastering Python Design Patterns - Third Edition

10

Patterns for Testing

In the previous chapters, we covered architectural patterns and patterns for specific use cases such as concurrency or performance.

In this chapter, we will explore design patterns that are particularly useful for testing. These patterns help in isolating components, making tests more reliable, and promoting code reusability.

In this chapter, we’re going to cover the following main topics:

• The Mock Object pattern
• The Dependency Injection pattern

Technical requirements

See the requirements presented in Chapter 1.

The Mock Object pattern

The Mock Object pattern is a powerful tool for isolating components during testing by simulating their behavior. Mock objects help create controlled testing environments and verify interactions ...