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(.module:
[lux #*
data/text/format
["_" test (#+ Test)]
[abstract/monad (#+ do)]
[control
pipe
["p" parser
["<.>" text (#+ Parser)]
["s" code]]]
[data
[number (#+ hex)]
["." error]
["." text ("#@." equivalence)]]
[math
["r" random]]
["." macro
[syntax (#+ syntax:)]]]
{1
["." /]})
(def: (should-pass regex input)
(-> (Parser Text) Text Bit)
(|> input
(<text>.run regex)
(case> (#error.Success parsed)
(text@= parsed input)
_
#0)))
(def: (text-should-pass test regex input)
(-> Text (Parser Text) Text Bit)
(|> input
(<text>.run regex)
(case> (#error.Success parsed)
(text@= test parsed)
_
false)))
(def: (should-fail regex input)
(All [a] (-> (Parser a) Text Bit))
(|> input
(<text>.run regex)
(case> (#error.Failure _)
true
_
false)))
(syntax: (should-check pattern regex input)
(macro.with-gensyms [g!message g!_]
(wrap (list (` (|> (~ input)
(<text>.run (~ regex))
(case> (^ (#error.Success (~ pattern)))
true
(#error.Failure (~ g!message))
(exec (log! (format "{{{Failure}}} " (~ g!message)))
false)
(~ g!_)
(exec (log! (format "{{{Success}}} " "OH NO"))
false))))))))
(def: basics
Test
(_.test "Can parse character literals."
(and (should-pass (/.regex "a") "a")
(should-fail (/.regex "a") ".")
(should-pass (/.regex "\.") ".")
(should-fail (/.regex "\.") "a"))))
(def: system-character-classes
Test
($_ _.and
(_.test "Can parse anything."
(should-pass (/.regex ".") "a"))
(_.test "Can parse digits."
(and (should-pass (/.regex "\d") "0")
(should-fail (/.regex "\d") "m")))
(_.test "Can parse non digits."
(and (should-pass (/.regex "\D") "m")
(should-fail (/.regex "\D") "0")))
(_.test "Can parse white-space."
(and (should-pass (/.regex "\s") " ")
(should-fail (/.regex "\s") "m")))
(_.test "Can parse non white-space."
(and (should-pass (/.regex "\S") "m")
(should-fail (/.regex "\S") " ")))
(_.test "Can parse word characters."
(and (should-pass (/.regex "\w") "_")
(should-fail (/.regex "\w") "^")))
(_.test "Can parse non word characters."
(and (should-pass (/.regex "\W") ".")
(should-fail (/.regex "\W") "a")))
))
(def: special-system-character-classes
Test
($_ _.and
(_.test "Lower-case."
(and (should-pass (/.regex "\p{Lower}") "m")
(should-fail (/.regex "\p{Lower}") "M")))
(_.test "Upper-case."
(and (should-pass (/.regex "\p{Upper}") "M")
(should-fail (/.regex "\p{Upper}") "m")))
(_.test "Alphabetic."
(and (should-pass (/.regex "\p{Alpha}") "M")
(should-fail (/.regex "\p{Alpha}") "0")))
(_.test "Numeric digits."
(and (should-pass (/.regex "\p{Digit}") "1")
(should-fail (/.regex "\p{Digit}") "n")))
(_.test "Alphanumeric."
(and (should-pass (/.regex "\p{Alnum}") "1")
(should-fail (/.regex "\p{Alnum}") ".")))
(_.test "Whitespace."
(and (should-pass (/.regex "\p{Space}") " ")
(should-fail (/.regex "\p{Space}") ".")))
(_.test "Hexadecimal."
(and (should-pass (/.regex "\p{HexDigit}") "a")
(should-fail (/.regex "\p{HexDigit}") ".")))
(_.test "Octal."
(and (should-pass (/.regex "\p{OctDigit}") "6")
(should-fail (/.regex "\p{OctDigit}") ".")))
(_.test "Blank."
(and (should-pass (/.regex "\p{Blank}") text.tab)
(should-fail (/.regex "\p{Blank}") ".")))
(_.test "ASCII."
(and (should-pass (/.regex "\p{ASCII}") text.tab)
(should-fail (/.regex "\p{ASCII}") (text.from-code (hex "1234")))))
(_.test "Control characters."
(and (should-pass (/.regex "\p{Contrl}") (text.from-code (hex "12")))
(should-fail (/.regex "\p{Contrl}") "a")))
(_.test "Punctuation."
(and (should-pass (/.regex "\p{Punct}") "@")
(should-fail (/.regex "\p{Punct}") "a")))
(_.test "Graph."
(and (should-pass (/.regex "\p{Graph}") "@")
(should-fail (/.regex "\p{Graph}") " ")))
(_.test "Print."
(and (should-pass (/.regex "\p{Print}") (text.from-code (hex "20")))
(should-fail (/.regex "\p{Print}") (text.from-code (hex "1234")))))
))
(def: custom-character-classes
Test
($_ _.and
(_.test "Can parse using custom character classes."
(and (should-pass (/.regex "[abc]") "a")
(should-fail (/.regex "[abc]") "m")))
(_.test "Can parse using character ranges."
(and (should-pass (/.regex "[a-z]") "a")
(should-pass (/.regex "[a-z]") "m")
(should-pass (/.regex "[a-z]") "z")))
(_.test "Can combine character ranges."
(and (should-pass (/.regex "[a-zA-Z]") "a")
(should-pass (/.regex "[a-zA-Z]") "m")
(should-pass (/.regex "[a-zA-Z]") "z")
(should-pass (/.regex "[a-zA-Z]") "A")
(should-pass (/.regex "[a-zA-Z]") "M")
(should-pass (/.regex "[a-zA-Z]") "Z")))
(_.test "Can negate custom character classes."
(and (should-fail (/.regex "[^abc]") "a")
(should-pass (/.regex "[^abc]") "m")))
(_.test "Can negate character ranges.."
(and (should-fail (/.regex "[^a-z]") "a")
(should-pass (/.regex "[^a-z]") "0")))
(_.test "Can parse negate combinations of character ranges."
(and (should-fail (/.regex "[^a-zA-Z]") "a")
(should-pass (/.regex "[^a-zA-Z]") "0")))
(_.test "Can make custom character classes more specific."
(and (let [RE (/.regex "[a-z&&[def]]")]
(and (should-fail RE "a")
(should-pass RE "d")))
(let [RE (/.regex "[a-z&&[^bc]]")]
(and (should-pass RE "a")
(should-fail RE "b")))
(let [RE (/.regex "[a-z&&[^m-p]]")]
(and (should-pass RE "a")
(should-fail RE "m")
(should-fail RE "p")))))
))
(def: references
Test
(let [number (/.regex "\d+")]
(_.test "Can build complex regexs by combining simpler ones."
(should-check ["809-345-6789" "809" "345" "6789"]
(/.regex "(\@<number>)-(\@<number>)-(\@<number>)")
"809-345-6789"))))
(def: fuzzy-quantifiers
Test
($_ _.and
(_.test "Can sequentially combine patterns."
(text-should-pass "aa" (/.regex "aa") "aa"))
(_.test "Can match patterns optionally."
(and (text-should-pass "a" (/.regex "a?") "a")
(text-should-pass "" (/.regex "a?") "")))
(_.test "Can match a pattern 0 or more times."
(and (text-should-pass "aaa" (/.regex "a*") "aaa")
(text-should-pass "" (/.regex "a*") "")))
(_.test "Can match a pattern 1 or more times."
(and (text-should-pass "aaa" (/.regex "a+") "aaa")
(text-should-pass "a" (/.regex "a+") "a")
(should-fail (/.regex "a+") "")))
))
(def: crisp-quantifiers
Test
($_ _.and
(_.test "Can match a pattern N times."
(and (text-should-pass "aa" (/.regex "a{2}") "aa")
(text-should-pass "a" (/.regex "a{1}") "a")
(should-fail (/.regex "a{3}") "aa")))
(_.test "Can match a pattern at-least N times."
(and (text-should-pass "aa" (/.regex "a{1,}") "aa")
(text-should-pass "aa" (/.regex "a{2,}") "aa")
(should-fail (/.regex "a{3,}") "aa")))
(_.test "Can match a pattern at-most N times."
(and (text-should-pass "aa" (/.regex "a{,2}") "aa")
(text-should-pass "aa" (/.regex "a{,3}") "aa")))
(_.test "Can match a pattern between N and M times."
(and (text-should-pass "a" (/.regex "a{1,2}") "a")
(text-should-pass "aa" (/.regex "a{1,2}") "aa")))
))
(def: groups
Test
($_ _.and
(_.test "Can extract groups of sub-matches specified in a pattern."
(and (should-check ["abc" "b"] (/.regex "a(.)c") "abc")
(should-check ["abbbbbc" "bbbbb"] (/.regex "a(b+)c") "abbbbbc")
(should-check ["809-345-6789" "809" "345" "6789"] (/.regex "(\d{3})-(\d{3})-(\d{4})") "809-345-6789")
(should-check ["809-345-6789" "809" "6789"] (/.regex "(\d{3})-(?:\d{3})-(\d{4})") "809-345-6789")
(should-check ["809-809-6789" "809" "6789"] (/.regex "(\d{3})-\0-(\d{4})") "809-809-6789")
(should-check ["809-809-6789" "809" "6789"] (/.regex "(?<code>\d{3})-\k<code>-(\d{4})") "809-809-6789")
(should-check ["809-809-6789-6789" "809" "6789"] (/.regex "(?<code>\d{3})-\k<code>-(\d{4})-\0") "809-809-6789-6789")))
(_.test "Can specify groups within groups."
(should-check ["809-345-6789" "809" ["345-6789" "345" "6789"]] (/.regex "(\d{3})-((\d{3})-(\d{4}))") "809-345-6789"))
))
(def: alternation
Test
($_ _.and
(_.test "Can specify alternative patterns."
(and (should-check ["a" (0 [])] (/.regex "a|b") "a")
(should-check ["b" (1 [])] (/.regex "a|b") "b")
(should-fail (/.regex "a|b") "c")))
(_.test "Can have groups within alternations."
(and (should-check ["abc" (0 ["b" "c"])] (/.regex "a(.)(.)|b(.)(.)") "abc")
(should-check ["bcd" (1 ["c" "d"])] (/.regex "a(.)(.)|b(.)(.)") "bcd")
(should-fail (/.regex "a(.)(.)|b(.)(.)") "cde")
(should-check ["123-456-7890" (0 ["123" "456-7890" "456" "7890"])]
(/.regex "(\d{3})-((\d{3})-(\d{4}))|b(.)d")
"123-456-7890")))
))
(def: pattern-matching
Test
(do r.monad
[sample1 (r.unicode 3)
sample2 (r.unicode 3)
sample3 (r.unicode 4)]
(case (format sample1 "-" sample2 "-" sample3)
(/.^regex "(.{3})-(.{3})-(.{4})"
[_ match1 match2 match3])
(_.test "Can pattern-match using regular-expressions."
(and (text@= sample1 match1)
(text@= sample2 match2)
(text@= sample3 match3)))
_
(_.test "Cannot pattern-match using regular-expressions."
#0))))
(def: #export test
Test
(<| (_.context (%name (name-of /.regex)))
($_ _.and
..basics
..system-character-classes
..special-system-character-classes
..custom-character-classes
..references
..fuzzy-quantifiers
..crisp-quantifiers
..groups
..alternation
..pattern-matching
)))
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