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(.module:
[lux #*
[data
text/format
["." name]]
["_" test (#+ Test)]
[abstract/monad (#+ do)]
[control
pipe
["p" parser]]
[data
["." error (#+ Error)]
["." text ("#@." equivalence)]
[collection
["." list]]]
[math
["r" random]]]
{1
["." /]})
(def: (should-fail input)
(All [a] (-> (Error a) Bit))
(case input
(#error.Failure _)
true
_
false))
(def: (should-pass reference sample)
(-> Text (Error Text) Bit)
(|> sample
(:: error.functor map (text@= reference))
(error.default false)))
(def: #export test
Test
(<| (_.context (name.module (name-of /._)))
($_ _.and
(_.test "Can detect the end of the input."
(|> (/.run /.end
"")
(case> (#.Right _) true _ false)))
(do r.monad
[size (|> r.nat (:: @ map (|>> (n/% 100) (n/max 10))))
sample (r.unicode size)
non-sample (|> (r.unicode size)
(r.filter (|>> (text@= sample) not)))]
($_ _.and
(_.test "Won't mistake non-empty text for no more input."
(|> (/.run /.end
sample)
(case> (#.Left _) true _ false)))
(_.test "Can find literal text fragments."
(and (|> (/.run (/.this sample)
sample)
(case> (#.Right []) true _ false))
(|> (/.run (/.this sample)
non-sample)
(case> (#.Left _) true _ false))))
))
($_ _.and
(_.test "Can lex anything"
(and (should-pass "A" (/.run /.any
"A"))
(should-fail (/.run /.any
""))))
(_.test "Can lex characters ranges."
(and (should-pass "Y" (/.run (/.range (char "X") (char "Z"))
"Y"))
(should-fail (/.run (/.range (char "X") (char "Z"))
"M"))))
(_.test "Can lex upper-case and lower-case letters."
(and (should-pass "Y" (/.run /.upper
"Y"))
(should-fail (/.run /.upper
"m"))
(should-pass "y" (/.run /.lower
"y"))
(should-fail (/.run /.lower
"M"))))
(_.test "Can lex numbers."
(and (should-pass "1" (/.run /.decimal
"1"))
(should-fail (/.run /.decimal
" "))
(should-pass "7" (/.run /.octal
"7"))
(should-fail (/.run /.octal
"8"))
(should-pass "1" (/.run /.hexadecimal
"1"))
(should-pass "a" (/.run /.hexadecimal
"a"))
(should-pass "A" (/.run /.hexadecimal
"A"))
(should-fail (/.run /.hexadecimal
" "))
))
(_.test "Can lex alphabetic characters."
(and (should-pass "A" (/.run /.alpha
"A"))
(should-pass "a" (/.run /.alpha
"a"))
(should-fail (/.run /.alpha
"1"))))
(_.test "Can lex alphanumeric characters."
(and (should-pass "A" (/.run /.alpha-num
"A"))
(should-pass "a" (/.run /.alpha-num
"a"))
(should-pass "1" (/.run /.alpha-num
"1"))
(should-fail (/.run /.alpha-num
" "))))
(_.test "Can lex white-space."
(and (should-pass " " (/.run /.space
" "))
(should-fail (/.run /.space
"8"))))
)
($_ _.and
(_.test "Can combine lexers sequentially."
(and (|> (/.run (p.and /.any /.any)
"YO")
(case> (#.Right ["Y" "O"]) true
_ false))
(should-fail (/.run (p.and /.any /.any)
"Y"))))
(_.test "Can create the opposite of a lexer."
(and (should-pass "a" (/.run (/.not (p.or /.decimal /.upper))
"a"))
(should-fail (/.run (/.not (p.or /.decimal /.upper))
"A"))))
(_.test "Can select from among a set of characters."
(and (should-pass "C" (/.run (/.one-of "ABC")
"C"))
(should-fail (/.run (/.one-of "ABC")
"D"))))
(_.test "Can avoid a set of characters."
(and (should-pass "D" (/.run (/.none-of "ABC")
"D"))
(should-fail (/.run (/.none-of "ABC")
"C"))))
(_.test "Can lex using arbitrary predicates."
(and (should-pass "D" (/.run (/.satisfies (function (_ c) true))
"D"))
(should-fail (/.run (/.satisfies (function (_ c) false))
"C"))))
(_.test "Can apply a lexer multiple times."
(and (should-pass "0123456789ABCDEF" (/.run (/.many /.hexadecimal)
"0123456789ABCDEF"))
(should-fail (/.run (/.many /.hexadecimal)
"yolo"))
(should-pass "" (/.run (/.some /.hexadecimal)
""))))
)
)))
|