"{ Package: 'stx:goodies/petitparser' }"
PPAbstractParserTest subclass:#PPComposedTest
instanceVariableNames:''
classVariableNames:''
poolDictionaries:''
category:'PetitTests-Tests'
!
!PPComposedTest methodsFor:'accessing'!
comment
^ ($" asParser , $" asParser negate star , $" asParser) flatten
!
identifier
^ (#letter asParser , #word asParser star) flatten
!
number
^ ($- asParser optional , #digit asParser plus , ($. asParser , #digit asParser plus) optional) flatten
! !
!PPComposedTest methodsFor:'testing'!
testDoubledString
| parser |
parser := ($' asParser , (($' asParser , $' asParser) / $' asParser negate) star flatten , $' asParser)
==> [ :nodes | nodes second copyReplaceAll: '''''' with: '''' ].
self assert: parser parse: '''''' to: ''.
self assert: parser parse: '''a''' to: 'a'.
self assert: parser parse: '''ab''' to: 'ab'.
self assert: parser parse: '''a''''b''' to: 'a''b'.
self assert: parser parse: '''a''''''''b''' to: 'a''''b'
!
testEvenNumber
"Create a grammar that parses an even number of a's and b's."
| a as b bs s |
a := $a asParser ==> [ :char | as := as + 1 ].
b := $b asParser ==> [ :char | bs := bs + 1 ].
s := (a / b) star >=> [ :stream :cc |
as := bs := 0.
cc value.
(as even and: [ bs even ])
ifFalse: [ PPFailure message: 'Even number of a and b expected' at: 0 ] ].
self assert: s fail: 'a' end: 1.
self assert: s fail: 'b' end: 1.
self assert: s fail: 'ab' end: 2.
self assert: s fail: 'ba' end: 2.
self assert: s fail: 'aaa' end: 3.
self assert: s fail: 'bbb' end: 3.
self assert: s fail: 'aab' end: 3.
self assert: s fail: 'abb' end: 3.
self assert: s parse: ''.
self assert: s parse: 'aa'.
self assert: s parse: 'bb'.
self assert: s parse: 'aaaa'.
self assert: s parse: 'aabb'.
self assert: s parse: 'abab'.
self assert: s parse: 'baba'.
self assert: s parse: 'bbaa'.
self assert: s parse: 'bbbb'
!
testIfThenElse
"S ::= if C then S else S | if C then S | X"
| start if then else cond expr parser |
start := PPDelegateParser new.
if := 'if' asParser token trim.
then := 'then' asParser token trim.
else := 'else' asParser token trim.
cond := 'C' asParser token trim.
expr := 'X' asParser token trim.
start setParser: (if , cond , then , start , else , start) / (if , cond , then , start) / expr.
parser := start end.
self assert: parser parse: 'X'.
self assert: parser parse: 'if C then X'.
self assert: parser parse: 'if C then X else X'.
self assert: parser parse: 'if C then if C then X'.
self assert: parser parse: 'if C then if C then X else if C then X'.
self assert: parser parse: 'if C then if C then X else X else if C then X'.
self assert: parser parse: 'if C then if C then X else X else if C then X else X'.
self assert: parser fail: 'if C'.
self assert: parser fail: 'if C else X'.
self assert: parser fail: 'if C then if C'
!
testLeftRecursion
"S ::= S 'x' S / '1'"
| parser |
parser := PPDelegateParser new.
parser setParser: ((parser , $x asParser , parser) / $1 asParser) memoized flatten.
self assert: parser parse: '1' to: '1'.
self assert: parser parse: '1x1' to: '1x1'.
self assert: parser parse: '1x1x1' to: '1x1x1'.
self assert: parser parse: '1x1x1x1' to: '1x1x1x1'.
self assert: parser parse: '1x1x1x1x1' to: '1x1x1x1x1'.
self assert: parser parse: '1x1x1x1x1x1' to: '1x1x1x1x1x1'
!
testListOfIntegers
"S ::= S , number | number"
| number list parser |
number := #digit asParser plus flatten trim
==> [ :node | node asInteger ].
list := (number separatedBy: $, asParser token trim)
==> [ :node | node select: [ :each | each isInteger ] ].
parser := list end.
self assert: parser parse: '1' to: (1 to: 1) asArray.
self assert: parser parse: '1,2' to: (1 to: 2) asArray.
self assert: parser parse: '1,2,3' to: (1 to: 3) asArray.
self assert: parser parse: '1,2,3,4' to: (1 to: 4) asArray.
self assert: parser parse: '1,2,3,4,5' to: (1 to: 5) asArray.
self assert: parser parse: '1' to: (1 to: 1) asArray.
self assert: parser parse: '1, 2' to: (1 to: 2) asArray.
self assert: parser parse: '1, 2, 3' to: (1 to: 3) asArray.
self assert: parser parse: '1, 2, 3, 4' to: (1 to: 4) asArray.
self assert: parser parse: '1, 2, 3, 4, 5' to: (1 to: 5) asArray.
self assert: parser parse: '1' to: (1 to: 1) asArray.
self assert: parser parse: '1 ,2' to: (1 to: 2) asArray.
self assert: parser parse: '1 ,2 ,3' to: (1 to: 3) asArray.
self assert: parser parse: '1 ,2 ,3 ,4' to: (1 to: 4) asArray.
self assert: parser parse: '1 ,2 ,3 ,4 ,5' to: (1 to: 5) asArray.
self assert: parser fail: ''.
self assert: parser fail: ','.
self assert: parser fail: '1,'.
self assert: parser fail: '1,,2'
!
testNestedComments
"C ::= B I* E"
"I ::= !!E (C | T)"
"B ::= /*"
"E ::= */"
"T ::= ."
| begin end any inside parser |
begin := '/*' asParser.
end := '*/' asParser.
any := #any asParser.
parser := PPDelegateParser new.
inside := end not , (parser / any).
parser setParser: begin , inside star , end.
self assert: parser parse: '/*ab*/cd' end: 6.
self assert: parser parse: '/*a/*b*/c*/'.
self assert: parser fail: '/*a/*b*/c'
!
testPalindrome
"S0 ::= a S1 a | b S1 b | ...
S1 ::= S0 | epsilon"
| s0 s1 parser |
s0 := PPDelegateParser new.
s1 := PPDelegateParser new.
s0 setParser: ($a asParser , s1 , $a asParser)
/ ($b asParser , s1 , $b asParser)
/ ($c asParser , s1 , $c asParser).
s1 setParser: s0 / nil asParser.
parser := s0 flatten end.
self assert: parser parse: 'aa' to: 'aa'.
self assert: parser parse: 'bb' to: 'bb'.
self assert: parser parse: 'cc' to: 'cc'.
self assert: parser parse: 'abba' to: 'abba'.
self assert: parser parse: 'baab' to: 'baab'.
self assert: parser parse: 'abccba' to: 'abccba'.
self assert: parser parse: 'abaaba' to: 'abaaba'.
self assert: parser parse: 'cbaabc' to: 'cbaabc'.
self assert: parser fail: 'a'.
self assert: parser fail: 'ab'.
self assert: parser fail: 'aab'.
self assert: parser fail: 'abccbb'
!
testParseAaaBbb
"S0 ::= a S1 b
S1 ::= S0 | epsilon"
| s0 s1 parser |
s0 := PPDelegateParser new.
s1 := PPDelegateParser new.
s0 setParser: $a asParser , s1 , $b asParser.
s1 setParser: s0 / nil asParser.
parser := s0 flatten.
self assert: parser parse: 'ab' to: 'ab'.
self assert: parser parse: 'aabb' to: 'aabb'.
self assert: parser parse: 'aaabbb' to: 'aaabbb'.
self assert: parser parse: 'aaaabbbb' to: 'aaaabbbb'.
self assert: parser parse: 'abb' to: 'ab' end: 2.
self assert: parser parse: 'aabbb' to: 'aabb' end: 4.
self assert: parser parse: 'aaabbbb' to: 'aaabbb' end: 6.
self assert: parser parse: 'aaaabbbbb' to: 'aaaabbbb' end: 8.
self assert: parser fail: 'a'.
self assert: parser fail: 'b'.
self assert: parser fail: 'aab'.
self assert: parser fail: 'aaabb'
!
testParseAaaaaa
"S ::= a a S | epsilon"
| s0 s1 parser |
s0 := PPDelegateParser new.
s1 := $a asParser , $a asParser , s0.
s0 setParser: s1 / nil asParser.
parser := s0 flatten.
self assert: parser parse: '' to: ''.
self assert: parser parse: 'aa' to: 'aa'.
self assert: parser parse: 'aaaa' to: 'aaaa'.
self assert: parser parse: 'aaaaaa' to: 'aaaaaa'.
self assert: parser parse: 'a' to: '' end: 0.
self assert: parser parse: 'aaa' to: 'aa' end: 2.
self assert: parser parse: 'aaaaa' to: 'aaaa' end: 4.
self assert: parser parse: 'aaaaaaa' to: 'aaaaaa' end: 6
!
testParseAbAbAb
"S ::= (A B)+"
| parser |
parser := ($a asParser , $b asParser) plus flatten.
self assert: parser parse: 'ab' to: 'ab'.
self assert: parser parse: 'abab' to: 'abab'.
self assert: parser parse: 'ababab' to: 'ababab'.
self assert: parser parse: 'abababab' to: 'abababab'.
self assert: parser parse: 'abb' to: 'ab' end: 2.
self assert: parser parse: 'ababa' to: 'abab' end: 4.
self assert: parser parse: 'abababb' to: 'ababab' end: 6.
self assert: parser parse: 'ababababa' to: 'abababab' end: 8.
self assert: parser fail: ''.
self assert: parser fail: 'a'.
self assert: parser fail: 'bab'
!
testParseAbabbb
"S ::= (A | B)+"
| parser |
parser := ($a asParser / $b asParser) plus flatten.
self assert: parser parse: 'a' to: 'a'.
self assert: parser parse: 'b' to: 'b'.
self assert: parser parse: 'ab' to: 'ab'.
self assert: parser parse: 'ba' to: 'ba'.
self assert: parser parse: 'aaa' to: 'aaa'.
self assert: parser parse: 'aab' to: 'aab'.
self assert: parser parse: 'aba' to: 'aba'.
self assert: parser parse: 'baa' to: 'baa'.
self assert: parser parse: 'abb' to: 'abb'.
self assert: parser parse: 'bab' to: 'bab'.
self assert: parser parse: 'bba' to: 'bba'.
self assert: parser parse: 'bbb' to: 'bbb'.
self assert: parser parse: 'ac' to: 'a' end: 1.
self assert: parser parse: 'bc' to: 'b' end: 1.
self assert: parser parse: 'abc' to: 'ab' end: 2.
self assert: parser parse: 'bac' to: 'ba' end: 2.
self assert: parser fail: ''.
self assert: parser fail: 'c'
!
testParseAnBnCn
"PEGs for a non context- free language:
a^n , b^n , c^n
S <- &P1 P2
P1 <- AB 'c'
AB <- 'a' AB 'b' / epsilon
P2 <- 'a'* BC end
BC <- 'b' BC 'c' / epsilon"
| s p1 ab p2 bc |
s := PPDelegateParser new.
p1 := PPDelegateParser new.
ab := PPDelegateParser new.
p2 := PPDelegateParser new.
bc := PPDelegateParser new.
s setParser: (p1 and , p2 end) flatten.
p1 setParser: ab , $c asParser.
ab setParser: ($a asParser , ab , $b asParser) optional.
p2 setParser: $a asParser star , bc.
bc setParser: ($b asParser , bc , $c asParser) optional.
self assert: s parse: 'abc' to: 'abc'.
self assert: s parse: 'aabbcc' to: 'aabbcc'.
self assert: s parse: 'aaabbbccc' to: 'aaabbbccc'.
self assert: s fail: 'bc'.
self assert: s fail: 'ac'.
self assert: s fail: 'ab'.
self assert: s fail: 'abbcc'.
self assert: s fail: 'aabcc'.
self assert: s fail: 'aabbc'
! !
!PPComposedTest methodsFor:'testing-examples'!
testComment
self assert: self comment parse: '""' to: '""'.
self assert: self comment parse: '"a"' to: '"a"'.
self assert: self comment parse: '"ab"' to: '"ab"'.
self assert: self comment parse: '"abc"' to: '"abc"'.
self assert: self comment parse: '""a' to: '""' end: 2.
self assert: self comment parse: '"a"a' to: '"a"' end: 3.
self assert: self comment parse: '"ab"a' to: '"ab"' end: 4.
self assert: self comment parse: '"abc"a' to: '"abc"' end: 5.
self assert: self comment fail: '"'.
self assert: self comment fail: '"a'.
self assert: self comment fail: '"aa'.
self assert: self comment fail: 'a"'.
self assert: self comment fail: 'aa"'
!
testIdentifier
self assert: self identifier parse: 'a' to: 'a'.
self assert: self identifier parse: 'a1' to: 'a1'.
self assert: self identifier parse: 'a12' to: 'a12'.
self assert: self identifier parse: 'ab' to: 'ab'.
self assert: self identifier parse: 'a1b' to: 'a1b'.
self assert: self identifier parse: 'a_' to: 'a' end: 1.
self assert: self identifier parse: 'a1-' to: 'a1' end: 2.
self assert: self identifier parse: 'a12+' to: 'a12' end: 3.
self assert: self identifier parse: 'ab^' to: 'ab' end: 2.
self assert: self identifier parse: 'a1b*' to: 'a1b' end: 3.
self assert: self identifier fail: ''.
self assert: self identifier fail: '1'.
self assert: self identifier fail: '1a'
!
testNumber
self assert: self number parse: '1' to: '1'.
self assert: self number parse: '12' to: '12'.
self assert: self number parse: '12.3' to: '12.3'.
self assert: self number parse: '12.34' to: '12.34'.
self assert: self number parse: '1..' to: '1' end: 1.
self assert: self number parse: '12-' to: '12' end: 2.
self assert: self number parse: '12.3.' to: '12.3' end: 4.
self assert: self number parse: '12.34.' to: '12.34' end: 5.
self assert: self number parse: '-1' to: '-1'.
self assert: self number parse: '-12' to: '-12'.
self assert: self number parse: '-12.3' to: '-12.3'.
self assert: self number parse: '-12.34' to: '-12.34'.
self assert: self number fail: ''.
self assert: self number fail: '-'.
self assert: self number fail: '.'.
self assert: self number fail: '.1'
!
testReturn
| number spaces return |
number := #digit asParser plus flatten.
spaces := #space asParser star.
return := (spaces , $^ asParser token , spaces , number)
==> [ :nodes | Array with: #return with: (nodes at: 4) ].
self assert: return parse: '^1' to: #(return '1').
self assert: return parse: '^12' to: #(return '12').
self assert: return parse: '^ 123' to: #(return '123').
self assert: return parse: '^ 1234' to: #(return '1234').
self assert: return fail: '1'.
self assert: return fail: '^'
! !
!PPComposedTest class methodsFor:'documentation'!
version
^ '$Header: /cvs/stx/stx/goodies/petitparser/PPComposedTest.st,v 1.5 2014-03-04 14:34:10 cg Exp $'
!
version_CVS
^ '$Header: /cvs/stx/stx/goodies/petitparser/PPComposedTest.st,v 1.5 2014-03-04 14:34:10 cg Exp $'
!
version_SVN
^ '$Id: PPComposedTest.st,v 1.5 2014-03-04 14:34:10 cg Exp $'
! !