RegressionTests__SmallIntegerTest.st
author Claus Gittinger <cg@exept.de>
Thu, 06 Nov 2014 17:03:19 +0100
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child 1306 9b2ba728b70e
permissions -rw-r--r--
class: RegressionTests::SmallIntegerTest changed: #testDivide #testMultiply #testNegation
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"{ Package: 'exept:regression' }"
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"{ NameSpace: RegressionTests }"
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TestCase subclass:#SmallIntegerTest
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	instanceVariableNames:''
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	classVariableNames:''
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	poolDictionaries:''
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	category:'tests-Regression-Numbers'
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!
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!SmallIntegerTest class methodsFor:'others'!
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version_CVS
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    ^ '$Header$'
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! !
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!SmallIntegerTest methodsFor:'tests-arithmetic'!
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testDivide
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        |zero _1 _2 _3 _4 _m2 _m4|
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        "circumvent compiler error about division by zero"
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        zero := 0.
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        self assert: 2 / 1 = 2.
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        self assert: (3 / 2) isFraction.
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        self assert: 4 / 2 = 2.
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        self assert: 4 / -2 = -2.
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        self assert: -4 / 2 = -2.
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        self assert: -4 / -2 = 2.
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        self should: [ 1 / zero ] raise: ZeroDivide.
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        _1 := 1.
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        _2 := 2.
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        _3 := 3.
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        _4 := 4.
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        _m2 := -2.
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        _m4 := -4.
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        self assert: _2 / _1 = _2.
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        self assert: (_3 / _2) isFraction.
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        self assert: _4 / _2 = 2.
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        self assert: _4 / _m2 = -2.
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        self assert: _m4 / _2 = -2.
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        self assert: _m4 / _m2 = 2.
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!
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testMultiply
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    |i ii|
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    #( 
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        16r3fff
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        16r7fff 
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        16rffff 
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        16r3fffffff
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        16r7fffffff
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        16rffffffff
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        16r20000000
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        16r40000000
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        16r80000000
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        16r100000000
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        16r20000001
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        16r40000001
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        16r80000001
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        16r100000001
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        "/ for 64 bit machines:
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        16r3fffffffffffffff
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        16r7fffffffffffffff
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        16rffffffffffffffff
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        16r2000000000000000
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        16r4000000000000000
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        16r8000000000000000
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        16r10000000000000000
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        16r2000000000000001
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        16r4000000000000001
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        16r8000000000000001
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        16r10000000000000001
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    ) do:[:x |
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        i := x.
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        ii := i * i.
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        self assert:((ii / i) = i).
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        i class == SmallInteger ifTrue:[
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            self assert:((ii / i) == i).
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        ].
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        i := x negated.
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        ii := i * i.
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        self assert:((ii / i) = i).
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        i class == SmallInteger ifTrue:[
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            self assert:((ii / i) == i).
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        ].
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    ].
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!
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testNegation
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    |i iN iNN|
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    #( 
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        16r3fffffff
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        16r7fffffff
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        16rffffffff
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        16r20000000
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        16r40000000
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        16r80000000
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        16r100000000
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        16r20000001
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        16r40000001
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        16r80000001
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        16r100000001
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        "/ for 64bit machines:
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        16r3fffffffffffffff
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        16r7fffffffffffffff
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        16rffffffffffffffff
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        16r2000000000000000
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        16r4000000000000000
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        16r8000000000000000
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        16r10000000000000000
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        16r2000000000000001
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        16r4000000000000001
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        16r8000000000000001
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        16r10000000000000001
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    ) do:[:x |
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        i := x.
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        iN := i negated.
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        iNN := iN negated.
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        self assert:(i = iNN).
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        i class == SmallInteger ifTrue:[
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            self assert:(i == iNN).
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        ].
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    ].
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! !
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!SmallIntegerTest methodsFor:'tests-class protocol'!
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testBasicNew
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    self should: [SmallInteger basicNew] raise: TestResult error. 
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!
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testMaxVal
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    "/ the original code did not check for pointer-size;
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    Smalltalk isSmalltalkX ifTrue:[
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        SmallInteger maxBytes == 4 ifTrue:[
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            self should: [SmallInteger maxVal = 16r3FFFFFFF].
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            self should: [SmallInteger maxVal == 16r3FFFFFFF].
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        ] ifFalse:[
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            self should: [SmallInteger maxVal = 16r3FFFFFFFFFFFFFFF].
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            self should: [SmallInteger maxVal == 16r3FFFFFFFFFFFFFFF].
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        ].
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    ] ifFalse:[
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        self should: [SmallInteger maxVal = 16r3FFFFFFF].
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    ]
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!
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testMinVal
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    "/ the original code did not check for pointer-size;
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    Smalltalk isSmalltalkX ifTrue:[
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        SmallInteger maxBytes == 4 ifTrue:[
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            self should: [SmallInteger minVal = -16r40000000].
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            self should: [SmallInteger minVal == -16r40000000].
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        ] ifFalse:[
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            self should: [SmallInteger minVal = -16r4000000000000000].
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            self should: [SmallInteger minVal == -16r4000000000000000].
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        ].
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    ] ifFalse:[
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        self should: [SmallInteger minVal = -16r40000000].
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    ]
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!
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testNew
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    self should: [SmallInteger new] raise: TestResult error. 
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! !
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!SmallIntegerTest class methodsFor:'documentation'!
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version
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    ^ '$Header$'
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! !
1074
905aea054cf4 category
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