| Safe Haskell | Safe-Infered |
|---|
Test.Feat.Access
Contents
Description
Functions for accessing the values of enumerations including compatibility with the property based testing frameworks QuickCheck and SmallCheck.
- index :: Enumerate a -> Integer -> a
- values :: Enumerable a => [(Integer, [a])]
- striped :: Enumerable a => Part -> Index -> Integer -> [(Integer, [a])]
- bounded :: Enumerable a => Integer -> [(Integer, [a])]
- ioFeat :: [(Integer, [a])] -> (a -> IO ()) -> IO ()
- ioAll :: Enumerable a => (a -> IO ()) -> IO ()
- ioBounded :: Enumerable a => Integer -> (a -> IO ()) -> IO ()
- uniform :: Enumerable a => Int -> Gen a
- toSeries :: Enumerable a => Int -> [a]
- valuesWith :: Enumerate a -> [(Integer, [a])]
- stripedWith :: Enumerate a -> Part -> Index -> Integer -> [(Integer, [a])]
- boundedWith :: Enumerate a -> Integer -> [(Integer, [a])]
- uniformWith :: Enumerate a -> Part -> Gen a
- toSeriesWith :: Enumerate a -> Int -> [a]
Accessing functions
index :: Enumerate a -> Integer -> aSource
Mainly as a proof of concept we can use the isomorphism between
natural numbers and (Part,Index) pairs to index into a type.
May not terminate for finite types.
Might be slow the first time it is used with a specific enumeration
because cardinalities need to be calculated.
The computational complexity (after cardinalities are computed) is a polynomial
in the size of the resulting value.
values :: Enumerable a => [(Integer, [a])]Source
All values of the enumeration by increasing cost (which is the number of constructors for most types). Also contains the cardinality of each list.
striped :: Enumerable a => Part -> Index -> Integer -> [(Integer, [a])]Source
A generalisation of values that enumerates every nth value of the
enumeration from a given starting point.
As a special case values = striped 0 0 1.
bounded :: Enumerable a => Integer -> [(Integer, [a])]Source
A version of vales that has a limited number of values in each inner list. If the list corresponds to a Part which is larger than the bound it evenly intersperses the values across the enumeration of the Part.
A simple property tester
ioFeat :: [(Integer, [a])] -> (a -> IO ()) -> IO ()Source
A rather simple but general property testing driver. The property is an (funcurried) IO function that both tests and reports the error. The driver goes on forever or until the list is exhausted, reporting the coverage and the number of tests before each new part.
Compatibility
QuickCheck
uniform :: Enumerable a => Int -> Gen aSource
Compatibility with QuickCheck. Distribution is uniform generator over
values bounded by the given size. Typical use: sized uniform.
SmallCheck
toSeries :: Enumerable a => Int -> [a]Source
Compatibility with SmallCheck.
Non-class versions of the access functions
valuesWith :: Enumerate a -> [(Integer, [a])]Source
Non class version of values.
stripedWith :: Enumerate a -> Part -> Index -> Integer -> [(Integer, [a])]Source
Non class version of striped.
toSeriesWith :: Enumerate a -> Int -> [a]Source
Non class version of toSeries.