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Date: Sun, 3 Apr 2011 08:12:05 +0000 (UTC)
From: "Sai Zhang (JIRA)" <jira@apache.org>
To: issues@commons.apache.org
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Subject: [jira] [Updated] (MATH-553) Bug in class#
 org.apache.commons.math.dfp.Dfp /
 org.apache.commons.math.linear.RealVectorwith reproducible JUnit test
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     [ https://issues.apache.org/jira/browse/MATH-553?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sai Zhang updated MATH-553:
---------------------------

    Attachment: ApacheMath_Documented_Test.java

> 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?
> 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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