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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)]]
[control
["[0]" try]
["[0]" exception]]
[math
["[0]" random (.only Random)]
[number
["n" nat]
["f" frac]]]
[world
[time
["[0]" instant (.use "[1]#[0]" order)]
["[0]" duration (.use "[1]#[0]" equivalence)]]]
[test
["_" property (.only Test)]]]]
[\\library
["[0]" / (.only)
["/[1]" //]]])
(def (series events)
(-> Nat
(Random (/.Series Frac)))
(do [! random.monad]
[.let [duration (random.only duration.positive? random.duration)]
offset (of ! each (duration.framed (duration.up 100 duration.normal_year))
duration)
.let [start (instant.after offset instant.epoch)]
interval (of ! each (duration.framed duration.week)
duration)
data (random.sequence events random.safe_frac)]
(in [//.#start start
//.#interval interval
//.#data data])))
(def (well_windowed? input additional output)
(All (_ input output)
(-> (/.Series input) Nat (/.Series output)
Bit))
(let [correct_start!
(instant#< (//.start output)
(//.start input))
correct_size!
(n.= (n.- (++ additional) (//.size input))
(//.size output))]
(and correct_start!
correct_size!)))
(def .public test
Test
(<| (_.covering /._)
(do [! random.monad]
[expected_events (of ! each (|>> (n.% 10) ++) random.nat)
input (series expected_events)
additional (of ! each (n.% expected_events) random.nat)])
(all _.and
(_.coverage [/.cumulative]
(let [output (/.cumulative input)]
(and (instant#= (//.start input)
(//.start output))
(n.= (//.size input)
(//.size output)))))
(_.coverage [/.windows]
(<| (try.else false)
(do try.monad
[output (/.windows additional input)]
(in (well_windowed? input additional output)))))
(_.coverage [/.window_size_is_too_large]
(when (/.windows (++ expected_events) input)
{try.#Failure error}
(exception.match? /.window_size_is_too_large error)
{try.#Success _}
false))
(<| (_.for [/.Average])
(all _.and
(_.coverage [/.exponential /.simple /.weighted
/.Factor /.simple_factor]
(let [exponential (/.exponential /.simple_factor input)
simple (/.simple input)
weighted (/.weighted input)]
(and (not (f.= exponential simple))
(not (f.= exponential weighted))
(not (f.= simple weighted)))))
(_.coverage [/.moving]
(<| (try.else false)
(do try.monad
[exponential (/.moving (/.exponential /.simple_factor)
additional
input)
simple (/.moving /.simple
additional
input)
weighted (/.moving /.weighted
additional
input)
.let [(open "//#[0]") (//.equivalence f.equivalence)]]
(in (and (and (well_windowed? input additional exponential)
(well_windowed? input additional simple)
(well_windowed? input additional weighted))
(and (not (//#= exponential simple))
(not (//#= exponential weighted))
(not (//#= simple weighted)))
)))))
))
)))
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