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A comment on Ask HN: What made you change your mind about a programming language/paradigm?. Parent comment

Re:Ask HN: What made you change your mind about a programmin... by stevesmithwick on Monday March 04, 2019 @05:00AM (#19300068)
A good use of mocks/spies is if you need to test a side-effect. For instance: did your code call that service with the right parameters?
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