QuickCheckVariant: Generator of "valid" and "invalid" data in a type class

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Generator of "valid" and "invalid" data in a type class


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Versions 0.1.0.1, 0.1.0.2, 0.1.0.3, 0.1.0.4, 0.1.1.0, 0.1.1.0, 0.2.0.0, 1.0.0.0, 1.0.0.1
Change log None available
Dependencies base (>4.6 && <5), QuickCheck [details]
License GPL-3.0-only
Author Jorge Santiago Alvarez Cuadros
Maintainer sanjorgek@ciencias.unam.mx
Category Testing
Home page https://github.com/sanjorgek/QuickCheckVariant
Bug tracker https://github.com/sanjorgek/QuickCheckVariant/issues
Source repo head: git clone git@github.com:sanjorgek/QuickCheckVariant.git
Uploaded by sanjorgek at 2016-07-27T23:49:22Z

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Readme for QuickCheckVariant-0.1.1.0

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QuickCheckVariant

Generator of "valid" and "invalid" data in a type class

For example, if you created

data Person = Anonymous { getId::String } | Client { getUsername::String, getName::String, getEmail::String} deriving(Show,Eq)

We can provide means to generate valid and invalid data, like:

instance Variant Person where
  valid = do
    id <- alternative
    username <- alternative
    name <- alternative
    domain <- alternative
    ext <- alternative
    (oneof . return) [Anonymous id, Client username name (username++"@"++domain++ext)]
  invalid = do
    username <- alternative
    name <- alternative
    return $ Client username name ""

See this post for more details