How Are Nullables Different From Mocks?
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James Shore
May 3, 2023, 12:25:13 PM5/3/23
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Hi everyone,
One of the most common questions I get about #nullables is, “How is that any different than a mock?”
The short answer is that Nullables result in sociable, state-based tests, and mocks (and spies) result in solitary, interaction-based tests. This has two major benefits:
1. Nullables catch bugs that mocks don't.
2. Nullables don't break when you refactor.
I go into more detail here:
PS: If you’re interested in #nullables and other “Testing Without Mocks” ideas, I have a live online course coming up on June 6th. You can learn more at https://www.jamesshore.com/s/nullables-training?js-list .
Cheers,
James
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