If a mocked function includes a difference from the original could a false positive, false negative, or both be introduced?

Computer Networking: A Top-Down Approach (7th Edition)
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ISBN:9780133594140
Author:James Kurose, Keith Ross
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If a mocked function includes a difference from the original could a false positive, false negative, or both be introduced? If so, provide an example. If not, 
provide an explanation.

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ANSWER:

Mocked Function:

Mock functions, otherwise called spies, are unique functions that permit us to follow how a specific function is called by outer code.

Rather than simply testing the result of the function, we can acquire extra data concerning how a function was utilized.

False Positive:

False Positives happen when a scanner, Web Application Firewall, or Intrusion Prevention System hails a security weakness that you don't have.

A false negative is something contrary to a false positive, letting you know that you don't have a weakness when, truth be told, you do.

In web application security, a false positive is the point at which a web application security scanner demonstrates that there is a weakness on your site, like SQL Injection when, truly, there isn't.

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