Mark DiFranco explains the reason we need to use mock classes. Learn which classes need to be mocked. Then, review some benefits of using mock classes when testing.
- [Instructor] Before we start writing tests…we'll first need to create mock versions…of some of our classes.…This will allow us to control the SUT in tests…and easily verify its behavior.…Mock classes are dummy classes…that don't actually do any work.…Instead they allow us to introspect which methods…were called and what its properties were set to.…A mock class is indispensable when testing classes…that have external side effects.…For example, when testing some code that makes…a web request we can use a mock class to verify…the correct methods recalled and ensure…that we don't make a real web request.…
- Why write unit tests?
- What is dependency injection?
- Using protocols to help with tests
- Handling external dependencies
- Anatomy of a test case
- Writing tests
- Analyzing code coverage
- Visualizing test results
- Writing and extending UI tests
Skill Level Intermediate
1. Dependency Injection
2. Using Protocols
3. Writing Tests
4. UI Tests
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