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