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From "Sai Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MATH-553) Bug in class# org.apache.commons.math.dfp.Dfp / org.apache.commons.math.linear.RealVectorwith reproducible JUnit test
Date Sun, 03 Apr 2011 19:50:05 GMT

    [ https://issues.apache.org/jira/browse/MATH-553?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13015199#comment-13015199
] 

Sai Zhang commented on MATH-553:
--------------------------------

Thanks Luc.

Seems there is a contradiction between mathematical equality and Java object
equality. OK, I understand
that is very special case.

Could you please check the other test "test1()", to see if it is a real bug?

-Sai





-- 

          Thanks

                    Sai


> Bug in class# org.apache.commons.math.dfp.Dfp / org.apache.commons.math.linear.RealVectorwith
reproducible JUnit test
> ---------------------------------------------------------------------------------------------------------------------
>
>                 Key: MATH-553
>                 URL: https://issues.apache.org/jira/browse/MATH-553
>             Project: Commons Math
>          Issue Type: Bug
>    Affects Versions: 2.2
>         Environment: jdk 1.6
>            Reporter: Sai Zhang
>         Attachments: ApacheMath_Documented_Test.java
>
>
> Hi all:
> I am writing an automated bug finding tool, and using
> Apache Commons Math as an experimental subject
> for evaluation.
> The tool creates executable JUnit tests as well as
> explanatory code comments. I attached one bug-revealing
> test as follows. Could you please kindly check it, to
> see if it is a real bug or not?
> Also, it would be tremendous helpful if you could give
> some feedback and suggestion on the quality of generated code comments?
> From the perspective of developers who are familiar with the code,
> is the automatically-inferred comment useful in understanding
> the generated test? is the comment helpful in bug fixing from the
> perspective of developers?
> Particularly when the automatically-generated tests
> are often long.
> Your suggestion will help us improve the tool.
> Please see attachment for the failed test.
> The comment appears in the form of:
> //Tests pass if .... (it gives some small change to the test which can make the failed
test pass)
> For example:
> //Test passes if var10 is: (double)<0
> java.lang.Double var10 = new java.lang.Double(0.0d);
> means if you change var10 to a double value which is < 0 (e.g., -1d), the failed test
will pass

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