Download to read offline
Uploaded byGil Zilberfeld
Dependency injection and Why It Matters to Testers
The document discusses dependency injection, a technique that allows one object to supply the dependencies of another, enhancing testability and decoupling. It features Spring, originally a dependency injection framework and now a comprehensive runtime for Java, which can facilitate testing by swapping dependencies with mocks or external services. The author, Gil Zilberfeld, provides links for further information and invites questions.
Dependency injection and Why It Matters to Testers
- 1. @gil_zilberfeld@gil_zilberfeld Dependency Injection and whatit means for testers
- 2. @gil_zilberfeld Hello! I AM GILZILBERFELD www.gilzilberfeld.com www.everydayunittesting.com @gil_zilberfeld
- 3. @gil_zilberfeld Dependency Injection Is atechnique whereby one object supplies the dependencies of another object.
- 4.
- 5. @gil_zilberfeld Simple Example Instead of: Passthe dependency:
- 6. @gil_zilberfeld Why DI? ◉ Separatecreation from usage ◉ Increase decoupling ◉ Ability to inject similar objects ◉ Increase testability
- 7.
- 8. @gil_zilberfeld What is Spring? ◉Originally a dependency injection framework ◉ Now a very useful and complex runtime for Java
- 9. @gil_zilberfeld Testing with Spring ◉Spring injection can easily swap dependencies: 3rd party components External services Redirection Mocks
- 10.
- 11. @gil_zilberfeld Spring Test usingInjection
- 12. @gil_zilberfeld Spring Test usingInjection
- 13.
- 14.
- 15.
- 16.
- 17.
- 18.
- 19.
- 20.
- 21.
- 22.
- 23. @gil_zilberfeld Thanks! ANY QUESTIONS? You canfind me at: @gil_zilberfeld Gil.Zilberfeld@gmail.com http://www.GilZilberfeld.com http://www.EverydayUnitTesting.com