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(.module:
[library
[lux #*
["_" test (#+ Test)]
[abstract
[monad (#+ do)]]
[data
["." text ("#\." equivalence)
["%" format (#+ format)]]]
[math
["." random]
[number
["n" nat]]]]]
[\\library
["." / (#+ exception:)
[//
["." try (#+ Try)]]]])
(exception: an-exception)
(exception: another-exception)
(def: label "YOLO")
(exception: (custom-exception {value Nat})
(/.report [label (%.nat value)]))
(def: #export test
Test
(do {! random.monad}
[expected random.nat
wrong (|> random.nat (random.filter (|>> (n.= expected) not)))
assertion-succeeded? random.bit
#let [report-element (\ ! map %.nat random.nat)]
field0 report-element
value0 report-element
field1 report-element
value1 report-element]
(<| (_.covering /._)
(_.for [/.Exception])
($_ _.and
(_.cover [/.return]
(case (/.return expected)
(#try.Success actual) (n.= expected actual)
(#try.Failure _) false))
(_.cover [/.throw]
(case (/.throw ..an-exception [])
(#try.Success _) false
(#try.Failure _) true))
(_.cover [/.construct]
(case (/.throw ..an-exception [])
(#try.Success _)
false
(#try.Failure message)
(text\= message (/.construct ..an-exception []))))
(_.cover [/.match?]
(/.match? ..an-exception
(/.construct ..an-exception [])))
(_.cover [/.assert]
(case (/.assert ..an-exception [] assertion-succeeded?)
(#try.Success _)
assertion-succeeded?
(#try.Failure message)
(and (not assertion-succeeded?)
(text\= message (/.construct ..an-exception [])))))
(_.cover [/.catch]
(and (n.= expected
(|> (/.throw ..an-exception [])
(/.catch ..an-exception (function (_ ex) expected))
(/.otherwise (function (_ ex) wrong))))
(n.= expected
(|> (/.throw ..another-exception [])
(/.catch ..an-exception (function (_ ex) wrong))
(/.catch ..another-exception (function (_ ex) expected))
(/.otherwise (function (_ ex) wrong))))))
(_.cover [/.otherwise]
(n.= expected
(|> (/.throw ..another-exception [])
(/.catch ..an-exception (function (_ ex) wrong))
(/.otherwise (function (_ ex) expected)))))
(_.cover [/.report]
(let [report (/.report [field0 value0]
[field1 value1])]
(and (text.contains? field0 report)
(text.contains? value0 report)
(text.contains? field1 report)
(text.contains? value1 report))))
(_.cover [/.enumerate]
(let [enumeration (/.enumerate %.text (list field0 value0 field1 value1))]
(and (text.contains? field0 enumeration)
(text.contains? value0 enumeration)
(text.contains? field1 enumeration)
(text.contains? value1 enumeration))))
(_.cover [/.with]
(and (case (/.with ..an-exception [] (#try.Success expected))
(#try.Success actual) (n.= expected actual)
(#try.Failure _) false)
(case (/.with ..an-exception [] (#try.Failure ""))
(#try.Success _) false
(#try.Failure message) (text\= message (/.construct ..an-exception [])))
(case (/.with ..an-exception []
(: (Try Nat)
(/.throw ..another-exception [])))
(#try.Success _)
false
(#try.Failure message)
(and (text.contains? (/.construct ..an-exception []) message)
(text.contains? (/.construct ..another-exception []) message)))))
(_.cover [/.exception:]
(case (/.throw ..custom-exception [expected])
(#try.Success _)
false
(#try.Failure message)
(and (text.contains? ..label message)
(text.contains? (%.nat expected) message))))
))))
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