--- /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$'
+! !
+