Correct. Mocking is a process for creating objects that mimic the behavior of real objects.

Graded Quiz: Advanced Methods For Test Driven Development » Week 3 » Introduction To Test Driven Development (TDD)

Q: Why is high test coverage valuable for development?

Correct. High test coverage gives you confidence that a large amount of code executed during the tests. In turn, the more lines of code executed through tests, the more confident you can be that the code works as expected.

Q: Fake data is more practical to use than real data in which of the following testing situations?

Correct. You can use sample data in testing. However, creating and maintaining sample data becomes tedious if you need hundreds, even thousands, of records of test data. Generating fake data is more practical in situations like this.

Q: When generating fakes in Python, what is one purpose for using the Meta class inside the factory?

Correct. One purpose of the using the Meta class is to indicate the model class for which the factory must create fakes.

Q: How do developers test fakes generated by a factory?

Correct. One purpose of the using the Meta class is to determine the attributes to use for generating data.

Q: Developers should use mocking for which of the following purposes?

Correct. Developers should use mocking to isolate their tests from external services that are not under test.

Q: When patching, developers change the behavior of which of the following testing items?

Correct. With patching, you can change the behavior of a function call.

Q: For which of the following situations is it useful to patch return values with data?

Correct. Patching a function’s return value with data is useful for testing error handlers; you can pass back error condition codes and see how your application behaves when it receives these return codes.

Q: Mock objects are useful in testing for which of the following reasons?

Correct. Developers can control how a mock object behaves and what it returns. They can set multiple attributes on it and make it behave just like the real object that it’s replacing.