What is the difference between spies and mocks in programming?
An example of an AI chatbot conversation about the difference between spies and mocks in programming.
Can you explain the difference between spies and mocks in testing?
Sure! In testing, a spy is a function that records how it was called, while a mock is a function that simulates behavior.
So, when would I use a spy instead of a mock?
You'd use a spy when you want to verify that a function was called correctly without changing its behavior. Mocks are used when you want to control the behavior of a function.
Can you give me an example of each?
Absolutely! For a spy, you might use it to check if a callback was invoked. For a mock, you could simulate an API response.
Are there any libraries that help with spies and mocks?
Yes, popular libraries like Jasmine, Jest, and Sinon provide built-in support for both spies and mocks.
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