blob: ae3bbb8e16dd8faafb999b1def2eb41b141cac97 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
(.module:
[library
[lux #*
["_" test (#+ Test)]
["." meta]
[abstract
[monad (#+ do)]]
[control
["." try]
["." exception]]
[math
["." random (#+ Random)]
[number
["i" int]]]
[macro
[syntax (#+ syntax:)]
["." code]]]]
[\\library
["." /]])
(syntax: (|divisor| [])
(do meta.monad
[divisor meta.seed]
(in (list (code.int (case divisor
0 +1
_ (.int divisor)))))))
(def: .public (random range)
(Ex [%] (-> Int (Random (/.Modulus %))))
(|> random.int
(\ random.monad map (i.% range))
(random.one (|>> /.modulus try.maybe))))
(def: .public test
Test
(<| (_.covering /._)
(_.for [/.Modulus])
(do random.monad
[divisor random.int
modulus (..random +1,000,000)
dividend random.int]
($_ _.and
(_.cover [/.modulus /.divisor]
(case (/.modulus divisor)
(#try.Success modulus)
(i.= divisor (/.divisor modulus))
(#try.Failure error)
(i.= +0 divisor)))
(_.cover [/.zero_cannot_be_a_modulus]
(case (/.modulus +0)
(#try.Failure error)
(exception.match? /.zero_cannot_be_a_modulus error)
(#try.Success modulus)
false))
(_.cover [/.literal]
(with_expansions [<divisor> (|divisor|)]
(i.= <divisor> (/.divisor (/.literal <divisor>)))))
(_.cover [/.=]
(with_expansions [<divisor> (|divisor|)]
(/.= (/.literal <divisor>)
(/.literal <divisor>))))
(_.cover [/.congruent?]
(and (/.congruent? modulus dividend dividend)
(or (not (/.congruent? modulus dividend (++ dividend)))
(i.= +1 (/.divisor modulus)))))
))))
|
