The way you design your software affects how easy it is to test it! In this week, we’ll:

• Understand the differences between different test levels (e.g., unit, integration, and system tests)
• Understand what makes a system more or less testable.
• Propose refactoring opportunities for increasing testability.
• Be able to apply mock objects in order to unit test a class.
• Understand when not to apply mock objects and go for integration tests.