"{ Package: 'stx:goodies/regression' }"

"{ NameSpace: RegressionTests }"

TestCase subclass:#ScaledDecimalTest

	instanceVariableNames:''

	classVariableNames:''

	poolDictionaries:''

	category:'tests-Regression-Numbers'

!

!ScaledDecimalTest methodsFor:'helpers'!

literal_helper1

    ^ 1.40s2.

    "Created: / 09-08-2011 / 21:11:13 / cg"

! !

!ScaledDecimalTest methodsFor:'temporary'!

literal_helper2

    ^ 1.40s2.

! !

!ScaledDecimalTest methodsFor:'tests'!

test01_ParserDefaultIsToSupportFixedPointLiterals

    "the old setting was to disallow by default;

     it is now on, by default"

    self assert:(ParserFlags allowFixedPointLiterals).

    "Created: / 09-08-2011 / 21:23:56 / cg"

!

test02_AsNumber

	"Ensure no loss of precision"

	| sd |

	sd := '1.40s2' asNumber.

	self assert: (ScaledDecimal ? FixedPoint) == sd class.

	self assert: sd scale == 2.

	Smalltalk isSmalltalkX ifTrue:[

	    self assert: '1.40' = sd printString.

	    self assert: '1.40s2' = sd storeString.

	] ifFalse:[

	    self assert: '1.40s2' = sd printString.

	]

    "Created: / 09-08-2011 / 21:25:31 / cg"

!

test03_AsNumberNegatedWithoutDecimalPoint

	| sd |

	sd := '-123s0' asNumber.

	self assert: (ScaledDecimal ? FixedPoint) == sd class.

	self assert: sd scale == 0.

	Smalltalk isSmalltalkX ifTrue:[

	    self assert: '-123' = sd printString.

	    self assert: '-123s0' = sd storeString.

	] ifFalse:[

	    self assert: '-123s0' = sd printString.

	]

    "Created: / 09-08-2011 / 21:25:43 / cg"

!

test04_AsNumberNegatedWithoutDecimalPoint2

	| sd |

	sd := '-123s2' asNumber.

	self assert: (ScaledDecimal ? FixedPoint) == sd class.

	self assert: sd scale == 2.

	Smalltalk isSmalltalkX ifTrue:[

	    self assert: '-123.00' = sd printString.

	    self assert: '-123.00s2' = sd storeString.

	] ifFalse:[

	    self assert: '-123.00s2' = sd printString.

	]

    "Created: / 09-08-2011 / 21:25:54 / cg"

!

test05_AsNumberWithExtendedScale

	| sd |

	sd := '123s2' asNumber.

	self assert: (ScaledDecimal ? FixedPoint) == sd class.

	self assert: sd scale == 2.

	Smalltalk isSmalltalkX ifTrue:[

	    self assert: '123.00' = sd printString.

	    self assert: '123.00s2' = sd storeString.

	] ifFalse:[

	    self assert: '123.00s2' = sd printString.

	]

    "Created: / 09-08-2011 / 21:25:59 / cg"

!

test06_AsNumberWithRadix

	| sd oldSetting |

	Smalltalk isSmalltalkX ifTrue:[

	    oldSetting := ParserFlags allowFixedPointLiterals.

	    ParserFlags allowFixedPointLiterals:true.

	    [

		sd := Number readSmalltalkSyntaxFrom:'10r-22.2s5'.

	    ] ensure:[

		ParserFlags allowFixedPointLiterals:oldSetting.

	    ]

	] ifFalse:[

	    sd := '10r-22.2s5' asNumber.

	].

	self assert: (ScaledDecimal ? FixedPoint) == sd class.

	self assert: sd scale == 5.

	Smalltalk isSmalltalkX ifTrue:[

	    self assert: '-22.20000' = sd printString.

	    self assert: '-22.20000s5' = sd storeString.

	] ifFalse:[

	    self assert: '-22.20000s5' = sd printString.

	]

    "Created: / 09-08-2011 / 21:26:05 / cg"

!

test07_AsNumberWithSuperfluousDecimalPoint

	| sd |

	sd := '123.s2' asNumber.

	self assert: (ScaledDecimal ? FixedPoint) == sd class.

	self assert: sd scale == 2.

	Smalltalk isSmalltalkX ifTrue:[

	    self assert: '123.00' = sd printString.

	    self assert: '123.00s2' = sd storeString.

	] ifFalse:[

	    self assert: '123.00s2' = sd printString.

	]

    "Created: / 09-08-2011 / 21:26:20 / cg"

!

test08_AsNumberWithoutDecimalPoint

	| sd |

	sd := '123s0' asNumber.

	self assert: (ScaledDecimal ? FixedPoint) == sd class.

	self assert: sd scale == 0.

	Smalltalk isSmalltalkX ifTrue:[

	    self assert: '123' = sd printString.

	    self assert: '123s0' = sd storeString.

	] ifFalse:[

	    self assert: '123s0' = sd printString.

	]

    "Created: / 09-08-2011 / 21:26:25 / cg"

!

test09_AsNumberWithoutDecimalPoint2

	| sd |

	sd := '123s2' asNumber.

	self assert: (ScaledDecimal ? FixedPoint) == sd class.

	self assert: sd scale == 2.

	Smalltalk isSmalltalkX ifTrue:[

	    self assert: '123.00' = sd printString.

	    self assert: '123.00s2' = sd storeString.

	] ifFalse:[

	    self assert: '123.00s2' = sd printString.

	]

    "Created: / 09-08-2011 / 21:26:30 / cg"

!

test10_ConvertFromFloat

	| aFloat sd f2 diff |

	aFloat := 11/13 asFloat.

	sd := aFloat asScaledDecimal: 2.

	self assert: 2 == sd scale.

	Smalltalk isSmalltalkX ifTrue:[

	    self assert: '0.85' = sd printString.

	] ifFalse:[

	    self assert: '0.84s2' = sd printString.

	].

	f2 := sd asFloat.

	diff := f2 - aFloat.

	self assert: diff < 1.0e-9. "actually, f = f2, but this is not a requirement"

    "Created: / 09-08-2011 / 21:26:38 / cg"

!

test11_ConvertFromFraction

	| sd |

	sd := (13 / 11) asScaledDecimal: 6.

	self assert: (ScaledDecimal ? FixedPoint) == sd class.

	Smalltalk isSmalltalkX ifTrue:[

	    self assert: ('1.181818' = sd printString).

	] ifFalse:[

	    self assert: ('1.181818s6' = sd printString).

	].

	self assert: 6 == sd scale

    "Created: / 09-08-2011 / 21:26:43 / cg"

!

test12_ConvertFromInteger

	"Converting an Integer to a ScaledDecimal yields a ScaledDecimal with

	scale 0, regardless of the scale specified in the #asScaledDecimal: message."

	| sd |

	Smalltalk isSmalltalkX ifTrue:[

	    "/ I think this behavior is wrong.

	    ^ self.

	].

	sd := 13 asScaledDecimal: 6.

	self assert: 0 = sd scale.

	self assert: ('13s0' = sd printString).

	sd := -13 asScaledDecimal: 6.

	self assert: 0 = sd scale.

	self assert: ('-13s0' = sd printString).

	sd := 130000000013 asScaledDecimal: 6.

	self assert: 0 = sd scale.

	self assert: ('130000000013s0' = sd printString).

	sd := -130000000013 asScaledDecimal: 6.

	self assert: 0 = sd scale.

	self assert: ('-130000000013s0' = sd printString)

    "Created: / 09-08-2011 / 21:26:46 / cg"

!

test13_Literal1

    "s2 is not a message to be sent to a float"

    self

	shouldnt:[ self literal_helper1 ]

	raise:MessageNotUnderstood

    "Created: / 09-08-2011 / 21:26:55 / cg"

!

test14_Literal2

	| sd |

	sd := 1.40s2.

	self assert: (ScaledDecimal ? FixedPoint) == sd class.

	self assert: sd scale == 2.

	Smalltalk isSmalltalkX ifTrue:[

	    self assert: '1.40' = sd printString.

	    self assert: '1.40s2' = sd storeString.

	] ifFalse:[

	    self assert: '1.40s2' = sd printString.

	].

    "Created: / 09-08-2011 / 21:27:01 / cg"

!

test15_LiteralInSTC

    |value|

    Class withoutUpdatingChangesDo:[

	self class

	    compile:

'literal_helper2

    ^ 1.40s2.

'

	    classified:'temporary'.

	Compiler stcCompileMethod:(self class compiledMethodAt:#literal_helper2).

    ].

    self

	shouldnt:[ self literal_helper2 ]

	raise:MessageNotUnderstood.

    value := self literal_helper2.

    self assert:( value isFixedPoint ).

    self assert:( (value * 10) = 14 ).

    self assert:( value asFloat = 1.4 ).

    "Created: / 09-08-2011 / 21:27:07 / cg"

!

test16_PrintString

	"The printed representation of a ScaledDecimal is truncated, not rounded.

	Not sure if this is right, so this test describes the current Squeak implementation.

	If someone knows a reason that rounding would be preferable, then update

	this test."

	| sd |

	sd := (13 / 11) asScaledDecimal: 6.

	Smalltalk isSmalltalkX ifTrue:[

	    self assert: ('1.181818' = sd printString).

	] ifFalse:[

	    self assert: ('1.181818s6' = sd printString).

	].

	sd := (13 / 11) asScaledDecimal: 5.

	Smalltalk isSmalltalkX ifTrue:[

	    self assert: ('1.18182' = sd printString).

	] ifFalse:[

	    self deny: ('1.18182s5' = sd printString).

	].

	sd := (13 / 11) asScaledDecimal: 5.

	Smalltalk isSmalltalkX ifTrue:[

	    self deny: ('1.18181' = sd printString).

	] ifFalse:[

	    self assert: ('1.18181s5' = sd printString).

	].

    "Created: / 09-08-2011 / 21:27:49 / cg"

!

test17_StoreAndRead

    |check|

    check := [:originalNum |

	|s readNum|

	s := originalNum storeString.

	readNum := Number readFrom:s.

	self assert:readNum = originalNum.

    ].

    check value:((FixedPoint fromString:'0.66666666')                   ).

    check value:((FixedPoint fromString:'0.66666666') withScale:2       ).

    check value:((FixedPoint fromString:'1.5')                          ).

    check value:((FixedPoint fromString:'1.5') withScale:2              ).

    check value:((FixedPoint fromString:'1.5') withScale:1              ).

    check value:((FixedPoint fromString:'1.5') withScale:0              ).

    "Created: / 09-08-2011 / 21:27:53 / cg"

! !

!ScaledDecimalTest class methodsFor:'documentation'!

version

    ^ '$Header$'

!

version_CVS

    ^ '$Header$'

! !