NDLI: Shrinking and showing functions: (functional pearl)

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Content Provider	ACM Digital Library
Author	Claessen, Koen
Abstract	Although quantification over functions in QuickCheck properties has been supported from the beginning, displaying and shrinking them as counter examples has not. The reason is that in general, functions are infinite objects, which means that there is no sensible show function for them, and shrinking an infinite object within a finite number of steps seems impossible. This paper presents a general technique with which functions as counter examples can be shrunk to finite objects, which can then be displayed to the user. The approach turns out to be practically usable, which is shown by a number of examples. The two main limitations are that higher-order functions cannot be dealt with, and it is hard to deal with terms that contain functions as subterms.
Starting Page	73
Ending Page	80
Page Count	8
File Format	PDF
ISBN	9781450315746
DOI	10.1145/2364506.2364516
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2012-09-13
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Quickcheck Counter example Testing
Content Type	Text
Resource Type	Article

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Shrinking and showing functions: (functional pearl)