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basic.js
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basic.js
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var assert = require('assert')
var bracery = require('../index')
var extend = bracery.ParseTree.extend
// initial grammar
var initJson = { abc: 'def',
hello: '[hello|hi]',
world: ['world', 'planet'],
show_user: function (config) { return 'user=' + config.node.user },
dynamo: function (config) { return [config.random() < .5 ? 'dynamik' : 'DYNAMIC'] },
lambda: function (config, x, y) { return x + 'world' + y },
json: function (config, x, y, z) { return 'x=' + JSON.stringify(x) + ' y=' + JSON.stringify(y) + ' z=' + JSON.stringify(z) },
coinflip: '&prob{.5}{heads}{tails}',
test1: 'testing',
test2: '~TEST1',
test3: 'x~test3',
test4: '"e{~TEST1}' }
var nTestSymbols = Object.keys(initJson).length // number of symbols in initial grammar
var b // the Bracery object
// tests
function doTests (testRunner) {
// test parameters
var maxTries = 100
// Theo's alternation test
expectExpand ('$Theo:={[dad|mom]} $theo $theo come to [Africa|our house|nowhere] [just kidding |seriously] ha ha ha ha ha ',
'dad dad dad come to nowhere just kidding ha ha ha ha ha ',
{ maxTries: maxTries })
// the tests themselves
expectExpand ('~hello ~world', 'hello world', {maxTries:maxTries})
expectExpand ('~hello ~world', 'hello planet', {maxTries:maxTries})
expectExpand ('~hello ~world', 'hi world', {maxTries:maxTries})
expectExpand ('~hello ~world', 'hi planet', {maxTries:maxTries})
expectExpand ('~hello ~world', 'yo earth', {maxTries:maxTries,fail:true})
// simple expansions
expectExpand ('~test1', 'testing')
expectExpand ('~test1', 'testings', {fail:true})
expectExpand ('~test1', 'TESTING', {fail:true})
expectExpand ('~test2', 'TESTING')
// default is to expand ~abc (to 'def'), as that is the alphabetically earliest symbol
expectExpand (undefined, 'def')
expectExpand ('', '')
// look out! recursion
expectExpand ('~test3', 'xxx')
expectExpand ('~test3', 'xxx', { maxDepth: 5 })
expectExpand ('~test3', 'xxxxx', { maxDepth: 5, maxRecursion: 10 })
expectExpand ('~test3', 'xxxx', { maxRecursion: 4 })
expectExpand ('~test3', 'xxxxxxxxxx', { maxRecursion: 10 })
expectExpand ('~test3 ~test3 ~test3', 'xxxxxxxxxx xxxxxxxxxx xxxxxxxxxx', { maxRecursion: 10 })
expectExpand ('~test3', 'xxxxxxxxxx', { maxRecursion: 10, maxLength: 5 })
expectExpand ('~test3 ~test3 ~test3', 'xxxxxxxxxx', { maxRecursion: 10, maxLength: 5 })
expectExpand ('~test3 ~test3 ~test3', 'xxxxxxxxxx xxxxxxxxxx', { maxRecursion: 10, maxLength: 15 })
expectExpand ('~test3 ~test3 ~test3', 'xxxxxxxxxx', { maxRecursion: 10, maxNodes: 5 })
// quoting
expectExpand ('~test4', '~TEST1')
expectExpand ('&eval{~test4}', 'TESTING')
expectExpandQuote ('"e{~test1}', '~test1')
expectExpand ('\\~test1', '~test1')
expectExpand ('~', '~')
expectExpandQuote ('"e{~}', '\\~')
expectExpandQuote ('"e{~}test1', '\\~test1')
expectExpandQuote ('"e{~te}st1', '~test1')
expectExpandQuote ('"e{~test1}', '~test1')
expectExpandQuote ('&eval{"e{~}}', '~')
expectExpandQuote ('&eval{"e{~test1}}', 'testing')
expectExpandQuote ('&eval{"e{~te}st1}', 'testing')
expectExpandQuote ('&eval{"e{~}test1}', 'testing', {fail:true})
expectExpandQuote ('&eval{"e{~}test1}', '~test1')
expectExpandQuote ('&eval{&eval{"e{~}test1}}', 'testing')
expectExpand ('\\~test1', '~test1')
expectExpand ('&eval{\\~test1}', 'testing')
expectExpandQuote ('"e{#heroPet#}', '#heropet#')
expectExpandQuote ('"e[a=>b]', '$a={"e{b}}')
expectExpandQuote ('"e[a=>b|c]', '$a={"e[b|c]}')
expectExpandQuote ('$heropet={freddy}&eval"e{#heroPet#}', 'freddy')
expectExpandQuote ('"e{&match/a/{cat}{$$0}}', '&match/a/{cat}$$0')
expectExpand ('$x=3 "e{x(&unquote$x)="e{&unquote$x}}', 'x(3)="e&unquote{$x}')
expectExpand ('$x=3 &eval"e{x(&unquote$x)="e{&unquote$x}}', 'x(3)=3')
expectExpand ('"e{a|b}', '[a|b]')
expectExpand ('"e&unquote{a|b}', 'a', {maxTries:maxTries})
expectExpand ('"e&unquote{a|b}', 'b', {maxTries:maxTries})
expectExpand ('"e"e&unquote{a|b}', '"e&unquote{[a|b]}')
expectExpandQuote ('"e{&~hello{abc}{def}}', '&~hello{abc}{def}')
expectExpand ('"e"e{&~hello{abc}{def}}', '"e{&~hello{abc}{def}}')
expectExpandQuote ('"e{&xapply~{ lambda }{$y}}', '&xapply~lambda$y')
expectExpandQuote ('"e{&xcall~a{b}{cd}{e}}', '&~a{b}{cd}{e}')
// user namespaces
expectExpand ('~{testuser/show_user}', 'user=testuser',)
expectExpand ('~testuser/show_user', 'user=testuser',)
expectExpand ('~{testuser/abc}', 'def',)
expectExpand ('"e~{testuser/abc}', '~{testuser/abc}',)
expectExpand ('"e{~testuser/abc}', '~{testuser/abc}',)
// case manipulation
expectExpand ('"e{~TEST1}', '~TEST1')
expectExpand ('"e{~Test1}', '~Test1')
expectExpand ('~TEST1', 'TESTING')
expectExpand ('~Test1', 'Testing')
expectExpand ('&uc{abc}', 'ABC')
expectExpand ('&lc{AbC}', 'abc')
expectExpand ('&cap{&lc{AbC}}', 'Abc')
// compromise
expectExpand ('&plural{child}', 'children')
expectExpand ('&singular{children}', 'child')
expectExpand ('&adjective{love}', 'loveable', {sorry_blame_compromise:true})
expectExpand ('&future{love}', 'will love')
expectExpand ('&past{love}', 'loved')
// arithmetic & numbers
expectExpand ('&add{2}{2}', '4')
expectExpand ('&add{two}{two}', 'four')
expectExpand ('&add{two cats}{4}', 'six cats')
expectExpand ('&add{two cats three dogs}{2}', 'four cats five dogs')
expectExpand ('&subtract{3}{3}', '0')
expectExpand ('&subtract{three}{three}', '0')
expectExpand ('&subtract{three}{four}', 'negative one')
expectExpand ('&subtract{3}{4}', '-1')
expectExpand ('&add{two}{&subtract{three}{four}}', 'one')
expectExpand ('&multiply{two}{three}', '6')
expectExpand ('÷{three}{two}', '1.5')
expectExpand ('&pow{three}{two}', '9')
expectExpand ('&pow{2}{3}', '8')
expectExpand ('>{three cats}{2}', 'three cats')
expectExpand ('>{three cats}{4}', '')
expectExpand ('<{three cats}{2}', '')
expectExpand ('<{three cats}{4}', 'three cats')
expectExpand ('&eq{three cats}{3}', 'three cats')
expectExpand ('&eq{three cats}{4}', '')
expectExpand ('&eq{zero}{}', 'zero')
expectExpand ('&eq{}{zero}', 'zero')
expectExpand ('&eq{}{}', 'eq')
expectExpand ('&neq{one}{}', 'one')
expectExpand ('&neq{}{one}', 'one')
expectExpand ('&neq{three cats}{3}', '')
expectExpand ('&neq{three cats}{4}', 'three cats')
expectExpand ('&leq{three cats}{3}', 'three cats')
expectExpand ('&leq{three cats}{4}', 'three cats')
expectExpand ('&leq{three cats}{2}', '')
expectExpand ('&geq{three cats}{3}', 'three cats')
expectExpand ('&geq{three cats}{4}', '')
expectExpand ('&geq{three cats}{2}', 'three cats')
expectExpand ('&round{3.141}', '3')
expectExpand ('&round{three point one four one}', '3')
expectExpand ('&round{3.6}', '4')
expectExpand ('&floor{3.6}', '3')
expectExpand ('&ceil{3.6}', '4')
expectExpand ('&ceil{&random{6}}', '6', {maxTries:maxTries})
expectExpand ('&ceil{&random{6}}', '1', {maxTries:maxTries})
expectExpand ('&wordnum{3}', 'three')
expectExpand ('&wordnum{32}', 'thirty two')
expectExpand ('&wordnum{three}', 'three')
expectExpand ('&dignum{3}', '3')
expectExpand ('&dignum{thirty two}', '32')
expectExpand ('&dignum{three}', '3')
expectExpand ('&ordinal{3}', '3rd')
expectExpand ('&ordinal{three}', 'third')
expectExpand ('&cardinal{3rd}', '3')
expectExpand ('&cardinal{third}', 'three')
expectExpand ('&abs{-3}', '3')
expectExpand ('&max{four}{6}', '6')
expectExpand ('&max{four}{2}', 'four')
expectExpand ('&min{-10}{twenty}', '-10')
expectExpand ('&percent{.5}', '50%')
expectExpand ('&percent{1.01}', '101%')
// test workaround for nlp's floating-point parser, that doesn't recognize '.5' as '0.5'
expectExpand ('&add{.25}{.3}', '0.55')
// variables
expectExpand ('$x={aha}$x', 'aha')
expectExpand ('$x=aha $x', 'aha')
expectExpand ('$x:=aha', 'aha')
expectExpand ('$x:=o h$x', 'oho')
expectExpand ('[x:aha]$x', 'aha')
expectExpand ('[x:aha]\n\n$x', 'aha')
expectExpand ('[x:aha]\n\n$x\n\n$x', 'aha\n\naha')
expectExpand ('[x=>aha]\n\n$x', 'aha')
expectExpand ('[x=>aha|aha]\n\n$x', '[aha|aha]')
expectExpand ('[x=>aha|aha]\n\n#x#', 'aha')
expectExpand ('$x=aha\n\n$x', 'aha')
expectExpand ('$x=aha\n\n$x\n\n$x', 'aha\n\naha')
expectExpand ('$z={zebedee}$zeb={zebadiah}$Zeb $Z', 'Zebadiah ZEBEDEE')
expectExpand ('$AbC={air}$aBC={hair}$abC={lair}$abc$Abc$ABC', 'lairLairLAIR')
expectExpand ('$x=3 $y=8 &map&vars{\[$_:&eval{\$$_}\]}', '[x:3][y:8]') // how to quote the environment...
expectExpand ('&set$x{oho}$x', 'oho')
// Game-specific extensions: &accept, &reject, &meter, &status, &footer, &tag
expectExpand ('&accept$x $accept', '$x')
expectExpand ('&reject{123}$reject', '123')
expectExpand ('&footer$y $footer', '$y')
expectExpand ('&meter{a}{$b} &meter{c}{$d/100} &json$meters', '[[["a","&math{$b}"],["c","&math{$d/100}"]]]')
expectExpand ('&meter{a}{$b}{$c} &json$meters', '[[["a","&math{$b}","$c"]]]')
expectExpand ('&status{$blah}$status', '$blah')
expectExpand ('$tags=abc &tag{def}&tag{ghi} $tags', 'abc def ghi')
expectExpandQuote ('"e&accept{$x}', '&accept{$x}')
expectExpandQuote ('"e&reject{$y $z}', '&reject{$y $z}')
expectExpandQuote ('"e&status{$blah}', '&status{$blah}')
expectExpandQuote ('"e&tag{newtag}', '&tag{newtag}')
expectExpandQuote ('"e&meter{icon}{$a + $b}', '&meter{icon}{$a + $b} ')
expectExpandQuote ('"e&meter{icon}{$a + $b}{status}', '&meter{icon}{$a + $b}{status}')
// syntax edge cases involving dummy alternations
expectExpand ('$abc=[ABC]', '=[ABC]')
expectExpand ('$abc={[DEF]}', '')
expectExpand ('$abc={[DEF]}$abc', '[DEF]')
expectExpand ('$x={a\\|b}$x', 'a|b')
expectExpand ('$dummy=[c\\|d]', '=[c|d]')
expectExpand ('$x={a\\|b}$r=&eval{[$x]}$r', 'a', {maxTries:maxTries})
expectExpand ('$x={a\\|b}$r=&eval{[$x]}$r', 'b', {maxTries:maxTries})
// Tracery variables
expectExpand ('[myvar:myval]', '')
expectExpand ('[myvar:myval]$myvar', 'myval')
expectExpand ('[myvar:myval]#myvar#', 'myval')
expectExpand ('[myvar=>myval]$myvar', 'myval')
expectExpand ('[myvar=>myval]#myvar#', 'myval')
expectExpand ('[myvar=>myval1|myval2]$myvar', '[myval1|myval2]')
expectExpand ('[myvar=>myval1|myval2]#myvar#', 'myval1', {maxTries:maxTries})
expectExpand ('[myvar=>myval1|myval2]#myvar#', 'myval2', {maxTries:maxTries})
// Tracery modifiers
expectExpand ('#test1#', 'testing')
expectExpand ('#test1.capitalize#', 'Testing')
expectExpand ('#test1.capitalizeAll#', 'TESTING')
// Tracery-style overriding
expectExpand ('$test1={OVERLOAD}#test1#', 'OVERLOAD')
expectExpand ('[test1:OVERLOAD]#test1#', 'OVERLOAD')
expectExpand ('$test1={OVERLOAD}~test1', 'testing')
expectExpand ('$test1={~test4}#test1#', 'TESTING')
// local scope
expectExpand ('$a={A}$b={B}$a$b&let$a={x}$b={y}{$a$b}$a$b', 'ABxyAB')
expectExpand ('$a={A}$b={B}$a$b&let $a={x} $b={y} {$a$b}$a$b', 'ABxyAB')
expectExpand ('$a={a}$b={${a}b$a}$ab="e{$a$b}#[a:3$b][b:5$a]ab#$a$b', '3aba53abaaaba')
// variable persistence
var vars = {}
expectExpand ('$a={x}$a', 'x', {vars:vars})
expectExpand ('$a', '')
expectExpand ('$a', 'x', {vars:vars,a_equals_x:true})
// lists
expectExpand ('{}', '{}')
expectExpand ('&{}', '')
expectExpand ('&cat{&{}}{xyz}', 'xyz')
expectExpand ('&cat{xyz}{abc}', 'xyzabc')
expectExpand ('&cat{123}&cat{xyz}{abc}', '123xyzabc')
expectExpand ('&first{&cat{123}&cat{xyz}{abc}}', '123')
expectExpand ('¬first{&cat{123}&cat{xyz}{abc}}', 'xyzabc')
expectExpand ('&last{&cat{123}&cat{xyz}{abc}}', 'abc')
expectExpand ('¬last{&cat{123}&cat{xyz}{abc}}', '123xyz')
expectExpand ('&prepend{123}&cat{xyz}{abc}', '123xyzabc')
expectExpand ('&prepend&cat{xyz}{abc}{123}', 'xyzabc123')
expectExpand ('$list={&prepend{123}&cat{xyz}{abc}}&first$list', '123')
expectExpand ('$list={&prepend&cat{xyz}{abc}{123}}&first$list', 'xyzabc')
expectExpand ('$list={&prepend{123}&cat{xyz}{abc}}&last$list', 'abc')
expectExpand ('$list={&prepend&cat{xyz}{abc}{123}}&last$list', '123')
expectExpand ('&append{123}&cat{xyz}{abc}', '123xyzabc')
expectExpand ('&first&append{123}&cat{xyz}{abc}', '123')
expectExpand ('&last&append{123}&cat{xyz}{abc}', 'xyzabc')
expectExpand ('&join{&prepend{123}&cat{xyz}{abc}}{, }', '123, xyz, abc')
expectExpand ('&islist{&{}}', '[]')
expectExpand ('&islist{}', '')
expectExpand ('&same{&{}}{}', '')
expectExpand ('&same{&{}}{&{}}', '1')
expectExpand ('&join{&{}x&{}y}{,}', 'x,y')
expectExpand ('&join{x&{}y&{}}{,}', 'xy')
expectExpand ('$x=&list{"e{abc}"e{def}}&map$a$x{$a!}', 'abc!def!')
expectExpand ('$x=&list{"e{abc}"e{def}}&join&map$a$x{$a!}{ }', 'abc! def!')
expectExpand ('$x=&list{"e{2}"e{4}"e{6}"e{0}}&filter$n$x>{$n}{3}', '46')
expectExpand ('$x=&list{"e{2}"e{4}"e{6}"e{0}}&reduce$n$x$r={0}&add$n$r', '12')
expectExpand ('$x=&list{"e{2}"e{4}"e{6}"e{0}}&reduce$n:$x$r={zero dogs}&add$r$n', 'twelve dogs')
expectExpand ('$x=&{A&,B&,C&,D}&indexof{C}{$x}', '2')
expectExpand ('$x=&{A&,B&,C&,D}&indexof{E}{$x}', '')
expectExpand ('$x={1}$a1={verily}$a2={in troth}&eval"e{$a&unquote$x indeed}', 'verily indeed')
expectExpand ('"e&unquote"e&infinitive$y', '&infinitive$y')
expectExpand ('$x={&{}abc"e{def}}&q$x', '&{abc&,def}')
expectExpand ('&push$x{a}&push$x{b}&uc&push$x{c}&push$x{...}&join$x{,} &shift$x $dots:={&pop$x} $quirk:=uh, &shift$x $dots &unshift$x&cat{x}{t} &uc&join$x$dots',
'a,b,c,... a ... uh,b ... X...T...C') // a lot going on in this one. Spaces must be exactly correct (of course)
expectExpand ('$x=&split{1 2 3}&eval&shift$x', '1') // check &shift$x is only called once within &eval
expectExpand ('$x=5 &inc$x x=$x $x=10 &dec$x x=$x', 'x=6 x=9') // note exact spaces
expectExpand ('$a=10 $b=20 $c=30 $d=40 ++$a --$b $c++ $d-- a=$a b=$b c=$c d=$d', '11 19 30 40 a=11 b=19 c=31 d=39') // note exact spaces
expectExpand ('$a=ten $a $a+=3 $a $a-=5 $a $a*=2 $a $a/=4 $a $a.=2 $a', 'ten thirteen eight 16 4 42')
expectExpand ('$x=&split{fresh word salad} &join{&shuffle{$x}}{ }', 'salad word fresh', {maxTries:maxTries})
expectExpand ('$x=&{1&,3&,2&,11}&json$x $y=&numsort{$x}{$_} &json$y', '[["1","3","2","11"]] [["1","2","3","11"]]')
expectExpand ('$x=&{1&,3&,2&,11}&json$x $y=&lexsort{$x}{$_} &json$y', '[["1","3","2","11"]] [["1","11","2","3"]]')
expectExpand ('&numsort$x', '')
expectExpand ('$x=hello &push$x $x=well $x $x=&pop $x', 'well hello') // default arguments to &push and &pop
expectExpand ('&join&split/,/{hello,world}', 'hello world') // default argument to &join
expectExpand ('&lexsort&split{a c d b}', 'abcd') // default argument to &lexsort
expectExpand ('&revstr{abcde}', 'edcba')
expectExpand ('&reverse{abcde}', 'abcde')
expectExpand ('&reverse&split//{abcde}', 'edcba') // empty regex in &split
expectExpand ('&reverse&split/b/{abcde}', 'cdea')
expectExpand ('&join&iota{5}{,}', '0,1,2,3,4')
expectExpand ('&map$x&iota{11}{$y+=$x}$y', '55')
expectExpand ('&for$x&iota{11}{$y+=$x}$y', '55')
// &makelist, "elist, &rotate, &cycle, &queue, &shuffle, &bump, &playlist
expectExpand ('$x=&split{1 2 3} &rotate$x', '231')
expectExpand ('[y=>&cycle$x&split{1 2 3}] #y# #y# #y# #y# #y# #y# #y#', '1 2 3 1 2 3 1')
expectExpand ('[y=>&queue$x&split{1 2 3}] #y# #y#', '1 2')
expectExpand ('[y=>&queue$x&split{1 2 3}] #y# #y# #y# #y#', '1 2 3 ')
expectExpand ('[y=>&cycle$x&list{"e{++$a}"e{++$b}"e{++$c}}] $a=$b:=$c:=0 $a$b$c #y# $a$b$c #y# $a$b$c #y# $a$b$c #y# $a$b$c #y# $a$b$c #y# $a$b$c #y# $a$b$c', '000 1 100 1 110 1 111 2 211 2 221 2 222 3 322')
expectExpand ('[y=>&queue$x&list{"e{++$a}"e{++$b}"e{++$c}}] $a=$b:=$c:=0 $a$b$c #y# $a$b$c #y# $a$b$c #y# $a$b$c #y# $a$b$c #y# $a$b$c #y# $a$b$c #y# $a$b$c', '000 1 100 1 110 1 111 111 111 111 111')
expectExpand ('&rotate&makelist{1}{2}{3}', '231')
expectExpand ('&rotate"elist{$x}{$y}{$z}', '$y$z$x')
expectExpand ('[tick=>You feel &cycle$mood&makelist{happy}{sad}{bored}.] #tick# #tick# #tick# #tick#',
'You feel happy. You feel sad. You feel bored. You feel happy.') // example from README.md
expectExpand ('&shuffle&split{1 2 3}', '321', {maxTries:maxTries})
expectExpand ('&shuffle&split{1 2 3}', '213', {maxTries:maxTries})
expectExpand ('&shuffle&split{1 2 3}', '132', {maxTries:maxTries})
expectExpand ('&bump&split{1 2 3}', '231', {maxTries:maxTries})
expectExpand ('&bump&split{1 2 3}', '213', {maxTries:maxTries,fail:true})
expectExpand ('&bump&split{1 2 3 4}', '2314', {maxTries:maxTries})
expectExpand ('&bump&split{1 2 3 4}', '2341', {maxTries:maxTries})
expectExpand ('&bump&split{1 2 3 4}', '2134', {maxTries:maxTries,fail:true})
expectExpand ('[y=>&playlist$x{&split{1 2 3 4}}] &$y &$y', '1 2', {maxTries:maxTries})
expectExpand ('[y=>&playlist$x{&split{1 2 3 4}}] &$y &$y', '2 1', {maxTries:maxTries})
expectExpand ('[y=>&playlist$x{&split{1 2 3 4}}] &$y &$y', '4 2', {maxTries:maxTries})
expectExpand ('[y=>&playlist$x{&split{1 2 3 4}}] &$y &$y', '1 1', {maxTries:maxTries,fail:true})
expectExpand ('[y=>&playlist$x{&split{1 2 3 4}}] &$y &$y', '2 2', {maxTries:maxTries,fail:true})
// these used to be tests of &strip, now obsoleted by &replace (and thus &strip has been stripped and replaced by &replace)
expectExpand ('&replace/hello/g{hello world hello}{}', ' world ')
expectExpand ('&replace/(hell)(o)/g{hello world hello}{$$2 well $$1}', 'o well hell world o well hell')
expectExpand ('&replace/&unquote{~abc}/{defcon}{}', 'con')
expectExpand ('~{abc}', 'def')
expectExpand ('~{abc}con', 'defcon')
expectExpand ('~{abc}con', 'defcon')
expectExpand ('&replace/&unquote{~abc}/{~{abc}con}{}', 'con')
expectExpand ('&replace/&unquote{~abc}/{~{abc}con defcon}{}', 'con defcon')
expectExpand ('&replace/&unquote{~abc}/g{~{abc}con defcon}{}', 'con con')
expectExpand ('$b={b}$x={Batch}$y=&replace/&unquote&replace/&unquote{$b}/{abc}{}/&replace/t/$x{}{}$y', 'Bh')
// strlen, length, comment
expectExpand ('$x=hello &strlen$x', '5')
expectExpand ('$x=hello &length$x', '1')
expectExpand ('$x=&split{hello world} &length$x', '2')
expectExpand ('$x=&split{hello world} &strlen$x', '10')
expectExpand ('&comment{hello world}', '')
expectExpandQuote ('"e&comment{hello world}', '&comment{hello world}')
// same, and, or, not
expectExpand ('&same{abc}{def}', '')
expectExpand ('&same{abc}{abc}', 'abc')
expectExpand ('&and{ }{world}', '')
expectExpand ('&and{hello}{ }', '')
expectExpand ('&and{hello}{world}', 'helloworld')
expectExpand ('&or{a}{b}', 'a')
expectExpand ('&or{ }{b}', 'b')
expectExpand ('$mood=lazy &and{ }{world$mood=busy} mood=$mood', ' mood=lazy')
expectExpand ('$mood=lazy &and{hello}{world$mood=busy} mood=$mood', 'helloworld mood=busy')
expectExpand ('$mood=lazy &or{ }{world$mood=busy} mood=$mood', 'world mood=busy')
expectExpand ('$mood=lazy &or{hello}{world$mood=busy} mood=$mood', 'hello mood=lazy')
expectExpand ('$x=10 $y=20 or=&or$y{++$x} x=$x and=&and{}{++$y} y=$y', 'or=20 x=10 and= y=20')
expectExpand ('¬{}', '1')
expectExpand ('¬{ }', '1')
expectExpand ('¬{1}', '')
// repetition
expectExpand ('&rep{Test}{3}', 'TestTestTest')
expectExpand ('&rep{Test}{3,5}', 'TestTestTest', {maxTries:maxTries})
expectExpand ('&rep{Test}{3,5}', 'TestTestTestTest', {maxTries:maxTries})
expectExpand ('&rep{Test}{3,5}', 'TestTest', {maxTries:maxTries,fail:true})
expectExpand ('&rep{Test}{3,5}', 'TestTestTestTestTestTest', {maxTries:maxTries,fail:true})
expectExpand ('&rep{Test}{6}', 'TestTest', {maxReps:2})
// eval
expectExpand ('$a={~}$b={test}$c={1}&eval{$a&cap{$b}$c}', 'Testing')
expectExpand ('$a={1}$b={2}$c={3}&let$a={~}$b={test}$c={1}&eval{$a&cap{$b}$c}$a&cap{$b}$c', 'Testing123')
expectExpand ('$a={1}$b={2}$c={3}&let$a={~}$b={test}$c={1}{&eval{$a&cap{$b}$c}}$a&cap{$b}$c', 'Testing123')
expectExpand ('$a={1}$b={2}$c={3}&let$a={~}$b={test}$c={1}{&eval{$a&cap{$b}$c}$a&cap{$b}$c}', 'Testing~Test1')
expectExpand ('$x=3 &preserve{x}', '$x=3')
expectExpand ('$x=3 $y=&preserve{x} $x=5 x=$x &$y x=$x', 'x=5 x=3')
expectExpand ('$x=3 $y=5 $s=&map&vars&preserve{$_} $x=10 $y=20 x=$x y=$y &$s x=$x y=$y', 'x=10 y=20 x=3 y=5')
expectExpand ('$x=&makelist{1}{2}{3} $y=&preserve{x} $x=&makelist{6}{2} x=&json$x &$y x=&json$x', 'x=[["6","2"]] x=[["1","2","3"]]')
// syntax, parse, grammar, tree
expectExpand ('&json&syntax"e{$x=[a|b]}', '[[["$","x","=",["{",[["[",[[["a"],"|"],[["b"]]],"]"]],"}"]]]]')
expectExpand ('&q&parsejson{\["a","b",\["c","d"\],\{"x":3,"w":\["abc","def"\]\}\]}', '&{a&,b&{c&,d}&{&{w&{abc&,def}}&{x&,3}}}')
expectExpand ('[a=>cat|#a# #a#]&json&parse{#a#}{cat cat cat}', '[["root",["#a#",["alt",["#a#",["alt",["#a#",["alt","cat"]]," ",["#a#",["alt","cat"]]]]," ",["#a#",["alt","cat"]]]]]]', {maxTries:maxTries})
expectExpand ('[a=>cat|#a# #a#]&json&parse{#a#}{cat cat cat}', '[["root",["#a#",["alt",["#a#",["alt","cat"]]," ",["#a#",["alt",["#a#",["alt","cat"]]," ",["#a#",["alt","cat"]]]]]]]]', {maxTries:maxTries})
expectExpand ('[a=>cat|#a# #a#]&json&parse{#a#}{cat cat dog}', '[""]')
expectExpand ('[a=>cat|#a# #a#]&json&parse{#a#}{cat cat cat}', '[""]', {maxParseLength:5})
expectExpand ('[a=>$animal|#a# #a#][animal:cat]&json&parse{#a#}{cat cat cat}', '[["root",["#a#",["alt",["#a#",["alt",["$animal","cat"]]]," ",["#a#",["alt",["#a#",["alt",["$animal","cat"]]]," ",["#a#",["alt",["$animal","cat"]]]]]]]]]', {maxTries:maxTries})
expectExpand ('[a=>~abc|#a# #a#]&json&parse{#a#}{def def def}', '[["root",["#a#",["alt",["#a#",["alt",["#a#",["alt",["~abc","def"]]]," ",["#a#",["alt",["~abc","def"]]]]]," ",["#a#",["alt",["~abc","def"]]]]]]]', {maxTries:maxTries})
expectExpand ('[a=>cat|dog]&json&parse{#a# $a}"e{cat [cat|dog]}', '[["root",["#a#",["alt","cat"]]," ",["$a","[cat|dog]"]]]')
expectExpand ('[sentence=>#plural_noun# #plural_verb# #prep_or_noun#|#singular_noun# #singular_verb# #prep_or_noun#][prep_or_noun=>#noun#|like #noun#][noun=>#plural_noun#|#singular_noun#][plural_noun=>fruit flies][singular_noun=>fruit|a banana][plural_verb=>fly|like][singular_verb=>flies|likes]&json&parse#sentence#{fruit flies like a banana}', '[["root",["#sentence#",["alt",["#plural_noun#","fruit flies"]," ",["#plural_verb#",["alt","like"]]," ",["#prep_or_noun#",["alt",["#noun#",["alt",["#singular_noun#",["alt","a banana"]]]]]]]]]]', {maxTries:maxTries})
expectExpand ('[sentence=>#plural_noun# #plural_verb# #prep_or_noun#|#singular_noun# #singular_verb# #prep_or_noun#][prep_or_noun=>#noun#|like #noun#][noun=>#plural_noun#|#singular_noun#][plural_noun=>fruit flies][singular_noun=>fruit|a banana][plural_verb=>fly|like][singular_verb=>flies|likes]&json&parse#sentence#{fruit flies like a banana}', '[["root",["#sentence#",["alt",["#singular_noun#",["alt","fruit"]]," ",["#singular_verb#",["alt","flies"]]," ",["#prep_or_noun#",["alt","like ",["#noun#",["alt",["#singular_noun#",["alt","a banana"]]]]]]]]]]', {maxTries:maxTries})
expectExpand ('[a=>#a#x|x]&json&parse#a#{xxxx}', '[["root",["#a#",["alt",["#a#",["alt",["#a#",["alt",["#a#",["alt","x"]],"x"]],"x"]],"x"]]]]')
expectExpand ('[a=>xo#a#|x]&json&parse#a#{xoxoxox}', '[""]', {maxSubsequenceLength:1})
expectExpand ('[a=>xo#a#|x]&json&parse#a#{xoxoxox}', '[["root",["#a#",["alt","xo",["#a#",["alt","xo",["#a#",["alt","xo",["#a#",["alt","x"]]]]]]]]]]', {maxSubsequenceLength:3})
expectExpand ('[a=>#a#ox|x]&json&parse#a#{xoxoxox}', '[""]', {maxSubsequenceLength:1})
expectExpand ('[a=>#a#ox|x]&json&parse#a#{xoxoxox}', '[["root",["#a#",["alt",["#a#",["alt",["#a#",["alt",["#a#",["alt","x"]],"ox"]],"ox"]],"ox"]]]]', {maxSubsequenceLength:3})
expectExpand ('[a=>#b#|#c#][b=>cat|dog#a#][c=>horse|cow][d=>whatever|why]&grammar#a#', '[_start=>#_1#][_1=>#_2#][_2=>#_3#|#_4#][_3=>#_5#][_4=>#_6#][_5=>cat|dog#_1#][_6=>horse|cow]')
expectExpand ('[a=>#b#|#c#][b=>cat|dog#a#][c=>horse|cow][d=>whatever|why]&grammar#d#', '[_start=>#_1#][_1=>#_2#][_2=>whatever|why]')
expectExpand ('[a=>#b#|#c#][b=>cat|dog#a#][c=>horse|cow][d=>whatever|why]&grammar{#a# #a#}', '[_start=>#_1##_2#][_1=>#_3#][_2=> #_1#][_3=>#_4#|#_5#][_4=>#_6#][_5=>#_7#][_6=>cat|dog#_1#][_7=>horse|cow]')
// test equivalency of &parse and &tree for a parse involving the elements our syntactic analyzer recognizes
// these elements include:
// variable lookup ($c)
// variable expansion without bindings (&eval{$z})
// symbol get &xget{~c}
// symbol expansion &eval{&xget{~b}} which should be the same as remote call ~b
// Tracery-style #x# which is equivalent to &if{$x}{&eval{$x}}{~x}. Both variable and symbol expansion are tested with #x# and #a#, respectively.
var defcatText = 'defcat'
var defcatRules = {a:"d#x#",b:"e&eval$z",c:"c$c"}
var defcatBracery = '[z:f&xget{~c}] [x=>~{b}t] $c=a'
var defcatParse = JSON.stringify ([["root",["#a#","d",["#x#",["~b","e",["&$z","fc",["$c","a"]]],"t"]]]])
expectExpand (defcatBracery + '#a#', defcatText, {rules:defcatRules})
expectExpand (defcatBracery + '&json&tree{#a#}', defcatParse, {rules:defcatRules})
expectExpand (defcatBracery + '&json&parse#a#{#a#}', defcatParse, {rules:defcatRules})
// a more parse-tree varied example of the same test, exposes a different test case
var defcatRules2 = {a:"d#x#t",b:"&eval{$z}c",c:"e$c"}
var defcatBracery2 = '[z:&xget{~c}] [x=>~{b}a] $c=f'
var defcatParse2 = JSON.stringify ([["root",["#a#","d",["#x#",["~b",["&$z","e",["$c","f"]],"c"],"a"],"t"]]])
expectExpand (defcatBracery2 + '#a#', defcatText, {rules:defcatRules2})
expectExpand (defcatBracery2 + '&json&tree{#a#}', defcatParse2, {rules:defcatRules2})
expectExpand (defcatBracery2 + '&json&parse#a#{#a#}', defcatParse2, {rules:defcatRules2})
// narrowed down to this case
expectExpand ('[z:z] &json&parse#za##za#', '[["root",["#za#",["&$z","z"],"a"]]]', {rules:{za:"&eval{$z}a"}})
expectExpand ('"e{&eval{$z}a}', '&eval$za', {fail:true}) // bug
expectExpand ('"e{&eval{$z}a}', '&eval{$z}a') // bug fixed
// in &parse expressions, &call$x and &apply$x{} should be handled the same as &eval
expectExpand ('[a=>cat|dog][b=>walk|whistle]&json&parse{&$a &apply{$b}{}}{cat walk}', '[["root",["&$a",["alt","cat"]]," ",["&$b",["alt","walk"]]]]')
// down with fixed nonterminals
expectExpand ('[hello:"e[yo|oy]][world:"e[earthling|human]]#hello# #world#', 'yo earthling', {maxTries:maxTries})
expectExpand ('[hello:"e[yo|oy]][world:"e[earthling|human]]#hello# #world#', 'oy earthling', {maxTries:maxTries})
expectExpand ('[hello:"e[yo|oy]][world:"e[earthling|human]]#hello# #world#', 'yo human', {maxTries:maxTries})
expectExpand ('[hello:"e[yo|oy]][world:"e[earthling|human]]#hello# #world#', 'oy human', {maxTries:maxTries})
expectExpand ('[hello:"e[yo|oy]][world:"e[earthling|human]]#hello# #world#', 'hello world', {maxTries:maxTries,fail:true})
// dynamic function binding
expectExpand ('~dynamo', 'dynamik', {maxTries:maxTries})
expectExpand ('~dynamo', 'DYNAMIC', {maxTries:maxTries})
expectExpand ('&~lambda{hi, }{!!!}', 'hi, world!!!')
expectExpand ('$y=&cat{hi, }{!!!}&xapply~lambda$y', 'hi, world!!!')
expectExpand ('$a=3 &~x{A}{B}', 'In x: a=3 1=A 2=B 0=AB', {rules:{x:["In x: a=$a 1=$$1 2=$$2 0=$$0"]}})
expectExpand ('$x="e{In x: a=$a 1=$$1 2=$$2 0=$$0} $a=3 &$x{A}{B}', 'In x: a=3 1=A 2=B 0=AB')
expectExpand ('~lambda', 'undefinedworldundefined')
expectExpand ('&xapply~lambda{}', 'undefinedworldundefined')
expectExpand ('&~lambda{}', 'worldundefined')
expectExpand ('&~lambda{$undef}', 'worldundefined')
// shorthands for &value and &list (precise generators)
expectExpand ('&xapply~json{&{1}&{2}&{3}}', 'x="1" y="2" z="3"')
expectExpand ('&xapply~json{1&{2}&{3}}', 'x="123" y=undefined z=undefined')
expectExpand ('&xapply~json{&{1&{2}&{&{3}}}}', 'x="1" y=["2"] z=[["3"]]')
expectExpand ('&xapply~json{&{1}&{&{2}}&{&{&{3}}}}', 'x="1" y=["2"] z=[["3"]]')
expectExpand ('&xapply~json&list{1&{2}&{3}}', 'x="1" y=["2"] z=["3"]')
expectExpand ('&json{&{&,a&,b&{&,c&,d}e&,f&,}}', '[["","a","b",["","c","d"],"e","f",""]]')
expectExpand ('&json{&{a&,b&{&,c&,d}e&,f&,}}', '[["a","b",["","c","d"],"e","f",""]]')
expectExpand ('&json{&{a&,b&{&,c&,d}e&,f}}', '[["a","b",["","c","d"],"e","f"]]')
expectExpand ('"ify{&{&,a&,b&{&,c&,d}&,e&,f&,}}', '&{&,a&,b&{&,c&,d}e&,f&,}')
expectExpand ('&q{&{&,a&,b&{&,c&,d}&,e&,f&,}}', '&{&,a&,b&{&,c&,d}e&,f&,}')
expectExpand ('$a=3 &value{{{[$a]}}}', '{{[3]}}')
expectExpand ('$x=&{&{&q{ab}&q{cd}&q{ef}}&{&q{gh}&q{ij}&q{kl}}&{&q{mn}&q{op}&q{qr}}} $x', 'abcdefghijklmnopqr')
expectExpand ('$x=&{&{&q{ab}&q{cd}&q{ef}}&{&q{gh}&q{ij}&q{kl}}&{&q{mn}&q{op}&q{qr}}} &nth{0}$x', 'abcdef')
expectExpand ('$x=&{&{&q{ab}&q{cd}&q{ef}}&{&q{gh}&q{ij}&q{kl}}&{&q{mn}&q{op}&q{qr}}} &nth{1}&nth{0}$x', 'cd')
// xget
expectExpandQuote ('"e&xget{~abc}', '&xget~abc')
expectExpand ('&xget~abc', 'def')
expectExpand ('&xget~world', '[world|planet]')
// call, apply, function
expectExpand ('$func=&function$first$second{0="ify$$0 1=$first 2=$second} &call{$func}{A}{B}', '0=&{A&,B} 1=A 2=B')
expectExpand ('$func=&function{$first$second}{0="ify$$0 1=$first 2=$second} &call{$func}{A}{B}', '0=&{A&,B} 1=A 2=B')
expectExpand ('$func=&function{$first,$second}{0="ify$$0 1=$first 2=$second} &call{$func}{A}{B}', '0=&{A&,B} 1=A 2=B')
expectExpand ('$func=&function{}{here we go} &$func &$func', 'here we go here we go')
expectExpand ('$func=&function{here we go} &$func &$func', '=&function{here we go} ')
expectExpand ('$func=&function$first$second{0="ify$$0 1=$first 2=$second} $y=&{one&,two} &apply{$func}$y', '0=&{one&,two} 1=one 2=two')
expectExpand ('&function$first$second{1=$first 2=$second}', '&let$first={$$1}{&let$second={$$2}{1=$first 2=$second}}')
expectExpand ('$x=99 &function$first$second{1=$first 2=$second x=$x}', '&let$first={$$1}{&let$second={$$2}{1=$first 2=$second x=$x}}')
expectExpand ('$x=99 &function$first$second{1=$first 2=$second x=&unquote$x}', '&let$first={$$1}{&let$second={$$2}{1=$first 2=$second x=99}}')
expectExpand ('[a=>cat|cat]&apply$a{}', 'cat')
expectExpand ('&apply"e{x=$$1 y=$$2}&split{3 4}', 'x=3 y=4')
expectExpand ('&apply"e{x=$$1 y=$$2}{3 4}', 'x=3 4 y=')
expectExpand ('"e{&call$f{A}{B}}', '&call$f{A}{B}')
// regexes
expectExpand ('&match/a/{cat}{$$0$$0}', 'aa')
expectExpand ('"ify&match/[aeiou]/g{generic}{&uc$$0}', '&{E&,E&,I}')
expectExpand ('&replace/a/g{catamaran}{u|o}', 'cutomoron', {maxTries:10*maxTries}) // bumping up maxTries because this has failed... should probably do the basic probability calculation required to set this with a given probability of failure (or specify this probability at the level of the whole test suite), given that the probability of success on each try is 1/16 in this case
expectExpand ('&join&split/[aeiou]+/{felicitous}{..}', 'f..l..c..t..s')
expectExpand ('&join&split{a bc d}{,}', 'a,bc,d')
expectExpand ('&join&map&split{a bc def}{"$_"}{, }', '"a", "bc", "def"')
expectExpand ('&grep/a/&split{cat dog man lizard}', 'catmanlizard')
// math
expectExpand ('$a=4 $d=3 $b=5 $c=2 &math{($a * $d) - $b + $c}', '9')
expectExpand ('$a=4 $d=3 $b=5 $c=2 &math{&value{zero} + ($a * $d) - $b + $c}', 'nine')
expectExpand ('$a=4 $d=3 $b=5 $c=2 &math{0.2*$a+$b}', '5.8')
expectExpand ('"e&math{ ( $a * $d )-$b+$c }', '&math{($a * $d) - $b + $c}')
expectExpand ('&math{.5}', '0.5')
expectExpand ('&math{0.5}', '0.5')
// links
expectExpand ('$x=3 &link{test$x}{$x}', '&link{test3}{$x}')
expectExpand ('"e&link{test}{$x}', '&link{test}{$x}')
expectExpand ('[x=>&link{test}{#x#}] #x#', '&link{test}{#x#}')
expectExpand ('[x=>&link{test}{Indeed, this is #x#}] #x#', '&link{test}{Indeed, this is #x#}')
expectExpand ('"e{&link{test}{$x}}', '&link{test}{$x}')
expectExpand ('"e{&link{test}{x=$x}}', '&link{test}{x=$x}')
expectExpand ('"e&reveal{hello}{world}', '&reveal{hello}{world}')
expectExpand ('$x=3 &reveal{test$x}{$x}', '&reveal{test3}{3}')
expectExpand ('"e&reveal{test}{$x}', '&reveal{test}{$x}')
expectExpand ('$x=3 &link{test}{$x}', 'test==>(link)==>$x', {makeLink:function(text,link,type){return text.text+'==>('+type+')==>'+link.text}})
expectExpand ('$x=3 &reveal{test}{$x}', 'test==>(reveal)==>3', {makeLink:function(text,link,type){return text.text+'==>('+type+')==>'+link.text}})
// [[Text with spaces, punctuation and caps.] shorthand for &link{Text with spaces, punctuation and caps.}{#text_with_spaces_punctuation_and_caps#}
expectExpand ('[[]]', '[[]]')
expectExpand ('[[ ]]', '[[ ]]')
expectExpand ('[[x]]', '&link{x}{#x#}')
expectExpand ('[[xYz]]', '&link{xYz}{#xyz#}')
expectExpand ('[[ X! ... ]]', '&link{ X! ... }{#x#}')
expectExpand ('[[Next room.]]', '&link{Next room.}{#next_room#}')
expectExpand ('[[Next room.]]', '&link{Next room.}{#next_room#}')
expectExpand ("[[Apostrophe's OK.]]", "&link{Apostrophe's OK.}{#apostrophes_ok#}")
// layout
expectExpand ('"e&layout{+001,-0002}{hello}', '&layout{1,-2}{hello}')
expectExpand ('&layout{1,2}{hi}', 'hi')
expectExpand ('&placeholder{}{1,2}', '')
expectExpand ('&placeholder$x{1,2}', '')
expectExpand ('&placeholder~test1{1,2}', '')
expectExpand ('"e&placeholder{}{1,2}', '&placeholder{}{1,2}')
expectExpand ('"e&placeholder$x{1,2}', '&placeholder$x{1,2}')
expectExpand ('"e&placeholder~test1{1,2}', '&placeholder~test1{1,2}')
// @x,y notation for layout, and [text]{target} shorthand for &link{text}{target}
expectExpand ('"e[a@2,3=>hello|there]', '[a@2,3=>hello|there]')
expectExpand ('"e[a@(2,3)=>hello|there]', '[a@2,3=>hello|there]')
expectExpand ('@1,2:START', '')
expectExpand ('"e{@1,2:START}', '&placeholder{}{1,2}')
expectExpand ('@1,2:START', '')
expectExpand ('"e{@1,2:START}', '&placeholder{}{1,2}')
expectExpand ('"e{@1,2$x}', '&placeholder$x{1,2}')
expectExpand ('"e{@1,2~test1}', '&placeholder~test1{1,2}')
expectExpand ('[hello]{world}', '&link{hello}{world}')
expectExpand ('$x=hi [$x]{$x world}', '&link{hi}{$x world}')
expectExpand ('[hello]@100,200{world}', '&link{hello}{world}')
expectExpand ('"e{[hello]@100,200{world}}', '&layout{100,200}{&link{hello}{world}}')
// Some weird infinite-loop bug that only showed up with certain self-referential recursions
// Turned out to be a missing property in the object returned by the maxDepth terminator.
maxDepthConfig = { maxDepth: 5 };
expectExpand ('[x=>&link@{a}{b #x#} [[y]]]#x#', '&link@{a}{b &link@{a}{b } &link{}{}} &link{y}{&if{$y}then{&eval{}}else{~y}}', maxDepthConfig)
expectExpand ('[x=>&link{a}{#b#}#x#]#x#', '&link{a}{&if{$b}then{&eval{}}else{~b}}&link{}{}', maxDepthConfig)
expectExpand ('$x="e{&link{a}{#b#}&eval$x}&eval$x', '&link{a}{&if{$b}then{&eval{}}else{~b}}&link{a}{&if{$b}then{&eval{}}else{~b}}&link{a}{&if{$b}then{}else{}}&link{}{}&link{}{}', maxDepthConfig)
expectExpand ('$x="e{&link{a}{&if{b}{c}{d}}&eval$x}&eval$x', '&link{a}{&if{b}then{c}else{d}}&link{a}{&if{b}then{c}else{d}}&link{a}{&if{b}then{}else{}}&link{}{}&link{}{}', maxDepthConfig)
expectExpand ('$x="e{&link{a}{&if{b}then{c}else{d}}&eval$x}&eval$x', '&link{a}{&if{b}then{c}else{d}}&link{a}{&if{b}then{c}else{d}}&link{a}{&if{b}then{}else{}}&link{}{}&link{}{}', maxDepthConfig)
// charclass, alt
expectExpand ('&charclass{abc}', '[a|b|c]')
expectExpand ('&charclass{a-e}', '[a|b|c|d|e]')
expectExpand ('&charclass{a-ej}', '[a|b|c|d|e|j]')
expectExpand ('&charclass{a\\\\-j\\|\\\\}', '[a|-|j|\\||\\\\]')
expectExpand ('&eval&charclass{a\\\\-j\\|\\\\}', 'a', {maxTries:maxTries})
expectExpand ('&eval&charclass{a\\\\-j\\|\\\\}', '-', {maxTries:maxTries})
expectExpand ('&eval&charclass{a\\\\-j\\|\\\\}', 'j', {maxTries:maxTries})
expectExpand ('&eval&charclass{a\\\\-j\\|\\\\}', '|', {maxTries:maxTries})
expectExpand ('&eval&charclass{a\\\\-j\\|\\\\}', '\\', {maxTries:maxTries})
expectExpand ('&alt&list{&split{all your base}&split{are belong to us}}', '[[all|your|base]|[are|belong|to|us]]')
expectExpand ('$b=&charclass{ -x}[a=>#a##b##a#|cat]&json&parse#a#{cat cat}', '[["root",["#a#",["alt",["#a#",["alt","cat"]],["#b#",["alt"," "]],["#a#",["alt","cat"]]]]]]')
expectExpand ('[a=>#a#&unquote&charclass{ -x}#a#|cat]&json&parse#a#{cat cat}', '[["root",["#a#",["alt",["#a#",["alt","cat"]],["alt"," "],["#a#",["alt","cat"]]]]]]')
// if
expectExpand ('$x=1 &if$x{hello} there', 'hello there')
expectExpand ('$x=1 &if¬$x{hello} there', ' there')
expectExpand ('$x=1 &if¬$x{hello}{hi} there', 'hi there')
// prob
expectExpand ('&prob{.5}{a}{b}', 'a', {maxTries:maxTries})
expectExpand ('&prob{.5}{a}{b}', 'b', {maxTries:maxTries})
expectExpand ('~coinflip', 'heads', {maxTries:maxTries}) // test bug that occurred when &random was permanently cached when called from a user-defined symbol, so future results were always the same
expectExpand ('~coinflip', 'tails', {maxTries:maxTries})
// wrapper for individual 'for a given input (lhs), expect the following output (rhs)'-style tests
// (lhs/rhs = left/right hand side)
function expectExpand (lhs, rhs, config) {
var fail = config && config.fail
function verify (text, done) {
text = bracery.ParseTree.makeString (text)
if (fail)
assert.notEqual (text, rhs)
else
assert.equal (text, rhs)
done()
}
it('should expand ' + (lhs || 'the empty string').replace(/\n/g,'\\n') + ' to ' + (rhs || 'the empty string').replace(/\n/g,'\\n')
+ (config ? (' with ' + JSON.stringify(config)) : ''),
testRunner (lhs, rhs, extend ({ enableParse: true }, config), verify))
}
// wrapper for quote/quasiquote equivalence tests
function expectExpandQuote (lhs, rhs, config) {
expectExpand (lhs, rhs, config)
expectExpand (lhs.replace(/"e/g,'&strictquote'), rhs, config)
}
}
// initialization test
describe('initialization', function() {
it('should initialize', function (done) {
b = new bracery.Bracery (initJson)
done()
})
it('should have ' + nTestSymbols + ' rules', function (done) {
assert.equal (Object.keys(b.rules).length, nTestSymbols)
done()
})
})
// wrappers for different groups of tests
describe('synchronous tests', function() {
doTests (function (lhs, rhs, config, verify) {
var maxTries = (config && config.maxTries) || 1
return function (done) {
var text
for (var n = 0; text !== rhs && n < maxTries; ++n)
text = b.expand (lhs, config).text
verify (text, done)
}
})
})
describe('asynchronous tests', function() {
doTests (function (lhs, rhs, config, verify) {
var maxTries = (config && config.maxTries) || 1
return function (done) {
function tryExpand (n) {
n = n || 0
b.expand (lhs,
extend
({},
config,
{ callback: function (expansion) {
var text = bracery.ParseTree.makeString (expansion.text)
if (text !== rhs && n < maxTries)
tryExpand (n + 1)
else
verify (text, done)
} }))
}
tryExpand()
}
})
})
describe('idempotent double expansion tests', function() {
doTests (function (lhs, rhs, config, verify) {
var maxTries = (config && config.maxTries) || 1
return function (done) {
var expand
var b2 = config && config.rules ? new bracery.Bracery(config.rules) : b
var config2 = extend ({}, config, {rules:null})
for (var n = 0; !(expand && expand.text === rhs) && n < maxTries; ++n)
expand = b2.expand (lhs, config2)
var text = bracery.ParseTree.makeRhsExpansionText (extend ({ rhs: expand.tree,
vars: {} },
b2.makeConfig (config2)))
verify (text, done)
}
})
})