JUnit has the equivalent of: assert:equals:range: It could then be: self assert: 11.11 equals: 11.11 range: 0.0001
Alexandre > On Sep 2, 2016, at 7:21 PM, Yuriy Tymchuk <yuriy.tymc...@me.com> wrote: > > how about having assert:closeTo: ? > >> On 02 Sep 2016, at 21:09, Henrik Nergaard <henrik.nerga...@uia.no> wrote: >> >> You could implement a custom assert in ConverterTest to do the comparison, >> something like >> >> assert: aNumber withPrecision: precision equals: otherNumber >> >> self >> assert: (aNumber round: precision) >> equals: otherNumber >> >> assert: aNumber closeTo: otherNumber >> >> assert: aNumber withPrecision: self defaultPrecision equals: otherNumber >> >> defaultPrecision >> ^ 2 >> >> >> Best regards, >> Henrik >> >> -----Original Message----- >> From: Pharo-users [mailto:pharo-users-boun...@lists.pharo.org] On Behalf Of >> stepharo >> Sent: Friday, September 2, 2016 8:41 PM >> To: Any question about pharo is welcome <pharo-users@lists.pharo.org> >> Subject: [Pharo-users] Comparing floats >> >> Hi >> >> I'm writing a simple converter between Celcius and Farhenheit as an example >> to start programming. >> >> >> Converter >> convertFarhenheit: anInteger >> ^ ((anInteger - 32) / 1.8) >> >> ConverterTest >> testFToC >> >> | converter | >> converter := TemperatureConverter new. >> self assert: ((converter convertFarhenheit: 86) = 30.0). >> self assert: ((converter convertFarhenheit: 50) = 10). >> self assert: ((converter convertFarhenheit: 52) = 11.11111111111111) >> >> >> My problem is with ((converter convertFarhenheit: 52) = 11.11111111111111) >> >> I do not want to have such ugly test. >> >> I tried either to control the output >> >> Converter >> convertFarhenheit: anInteger >> ^ ((anInteger - 32) / 1.8) roundDownTo: 0.1 >> >> Not a good idea >> >> Or to compare with closeTo: >> >> self assert: ((converter convertFarhenheit: 52) closeTo: 11.11) >> >> does not work because we cannot set the precision. >> >> So at ESUG I briefly discuss that with Nicolas Cellier and I need help. >> >> Should I introduce in pharo closeTo:interval: >> >> Any suggestions that a newby can understand is welcome. >> >> >> Stef >> >> >> > > -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.
