unit testing with class and floatsThis is a discussion on unit testing with class and floats within the RUBY forums in Programming Languages category; Hi there im learning unit testing and have just recently started using classes (very basic no superclass etc) and now running into problems. I have a function which returns a class ojbect that contains float variables. The assert_equal is constantly failing. However when it prints out a summary of the two things i compared in the assert they are exaclty the same. So im wondering if its something to do with classes, perhaps i have to define a method in the class which tells assert how to compare objects of that class or its to do with the fact there ... | ||||||||
| | ||||||||
| ||||||||
| Register | FAQ | Calendar | Search | Today's Posts | Mark Forums Read |
|
#1
08-27-2008, 04:51 AM
| |||
| |||
 unit testing with class and floats Hi there im learning unit testing and have just recently started using classes (very basic no superclass etc) and now running into problems. I have a function which returns a class ojbect that contains float variables. The assert_equal is constantly failing. However when it prints out a summary of the two things i compared in the assert they are exaclty the same. So im wondering if its something to do with classes, perhaps i have to define a method in the class which tells assert how to compare objects of that class or its to do with the fact there are floats in the object (i checked previous posts and google and found out there are issues with floats and assert) or perhaps both. -- Posted via http://www.ruby-forum.com/.  |
|
#2
08-27-2008, 04:55 AM
| |||
| |||
| Re: unit testing with class and floats sorry a (simplified) example def simpleclass attr_accessor :big_num #its a float!!! end expected = simpleclass.new(105.234) assert_equal(expected, somefunction(blahblah)) i expect somefunction to return a class with 105.234 in the summary it shows that the function does in fact do that but it still fails it. -- Posted via http://www.ruby-forum.com/. |
|
#3
08-27-2008, 05:03 AM
| |||
| |||
| Re: unit testing with class and floats 2008/8/27 Adam Akhtar <adamtemporary@gmail.com>: > sorry a (simplified) example > > def simpleclass > attr_accessor :big_num #its a float!!! > end > > expected = simpleclass.new(105.234) > > assert_equal(expected, somefunction(blahblah)) > > i expect somefunction to return a class with 105.234 > > in the summary it shows that the function does in fact do that but it > still fails it. When comparing floats there is a chance that although the floats might be represented the same on screen there might be differences in their storage. For instance 1.0 and 1.0000001 might look the same on the screen but will not be the same if compared with ==. You should rather use assert_in_delta when comparing two floats. Farrel -- Aimred - Ruby Development and Consulting http://www.aimred.com |
|
#4
08-28-2008, 01:03 AM
| |||
| |||
| Re: unit testing with class and floats ahhh i thought you could only use assert_in_delta with only floats directly. Ill try passing my class objects with it. Thanks -- Posted via http://www.ruby-forum.com/. |
 |
« Previous Thread
|
Next Thread »
| Thread Tools | |
| Display Modes | |
Linear Mode
All times are GMT -5. The time now is 08:23 PM.
