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... This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
... If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
(.require
[library
[lux (.except)
[abstract
[monad (.only do)]]
[math
["[0]" random (.only Random)]
[number
["i" int]]]
[test
["_" property (.only Test)]]]]
[\\library
["[0]" /]])
(/.def .public (any _ choice positive negative zero)
[(All (_ value))] [Int value value value] value
zero
(/.method (any next choice positive negative zero)
(i.> +0 choice)
positive)
(/.method (any next choice positive negative zero)
(i.< +0 choice)
negative)
)
(def .public test
Test
(<| (_.covering /._)
(do [! random.monad]
[positive random.nat
negative random.nat
zero random.nat])
(all _.and
(_.coverage [/.def]
(same? zero (any +0 positive negative zero)))
(_.coverage [/.method]
(and (same? positive (any +1 positive negative zero))
(same? negative (any -1 positive negative zero))))
)))
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