--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/PPExpressionParserTest.st Mon Jul 02 07:34:28 2018 +0200
@@ -0,0 +1,84 @@
+"{ Package: 'stx:goodies/petitparser/tests' }"
+
+"{ NameSpace: Smalltalk }"
+
+PPArithmeticParserTest subclass:#PPExpressionParserTest
+ instanceVariableNames:''
+ classVariableNames:''
+ poolDictionaries:''
+ category:'PetitTests-Tests'
+!
+
+
+!PPExpressionParserTest class methodsFor:'testing'!
+
+shouldInheritSelectors
+ ^ true
+! !
+
+!PPExpressionParserTest methodsFor:'accessing'!
+
+parserInstance
+ | expression parens number |
+ expression := PPExpressionParser new.
+ parens := $( asParser trim , expression , $) asParser trim
+ ==> [ :value | value second ].
+ number := (#digit asParser plus , ($. asParser , #digit asParser plus) optional) flatten trim
+ ==> [ :value | value asNumber ].
+ expression term: parens / number.
+ expression
+ group: [ :g |
+ g prefix: $- asParser trim do: [ :op :a | a negated ] ];
+ group: [ :g |
+ g postfix: '++' asParser trim do: [ :a :op | a + 1 ].
+ g postfix: '--' asParser trim do: [ :a :op | a - 1 ] ];
+ group: [ :g |
+ g right: $^ asParser trim do: [ :a :op :b | a raisedTo: b ] ];
+ group: [ :g |
+ g left: $* asParser trim do: [ :a :op :b | a * b ].
+ g left: $/ asParser trim do: [ :a :op :b | a / b ] ];
+ group: [ :g |
+ g left: $+ asParser trim do: [ :a :op :b | a + b ].
+ g left: $- asParser trim do: [ :a :op :b | a - b ] ].
+ ^ expression end
+! !
+
+!PPExpressionParserTest methodsFor:'testing'!
+
+testPostfixAdd
+ self assert: '0++' is: 1.
+ self assert: '0++++' is: 2.
+ self assert: '0++++++' is: 3.
+
+ self assert: '0+++1' is: 2.
+ self assert: '0+++++1' is: 3.
+ self assert: '0+++++++1' is: 4
+!
+
+testPostfixSub
+ self assert: '1--' is: 0.
+ self assert: '2----' is: 0.
+ self assert: '3------' is: 0.
+
+ self assert: '2---1' is: 0.
+ self assert: '3-----1' is: 0.
+ self assert: '4-------1' is: 0.
+!
+
+testPrefixNegate
+ self assert: '1' is: 1.
+ self assert: '-1' is: -1.
+ self assert: '--1' is: 1.
+ self assert: '---1' is: -1
+! !
+
+!PPExpressionParserTest class methodsFor:'documentation'!
+
+version
+ ^ '$Header$'
+!
+
+version_CVS
+ ^ '$Header$'
+! !
+