How to assign TestNG test results to use cases? - unit-testing

Question

I need to assign my test results to use cases.
Currently I have TestNG tests for my classes (unit tests).
Obviously those tests are classes exist because of use cases, but there is no obvious 1-1 mapping.
Is it possible to configure TestNG reports to include custom groups in reporting?
Like
F02UC01 parse input
for this use case I have test classes:
com.company.product.input.ParseTest
F03UC02 produce output
for this use case I have test
com.company.product.input.OutputTest
com.company.product.input.AnotherOutputTest
Ideally, I do not want to rerun or rewrite existing tests. I just want another test report, with diffrent grouping criterias.

Answer 1

Usually you do this by creating a suite xml file. E.g.
<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd" >
<suite name="Use Case Tests">
<test name="F02UC01 parse input">
<classes>
<class name="com.company.product.input.ParseTest"/>
</classes>
</test>
<test name="F03UC02 produce output">
<classes>
<class name="com.company.product.input.OutputTest"/>
<class name="com.company.product.input.AnotherOutputTest"/>
</classes>
</test>
</suite>
Maybe you can select them by packages instead of classes.
<packages>
<package name="com.company.product.input.*"/>
</packages>
You can also mix classes and packages selection. See the testng documentation.
EDIT
I am running all tests anyway. I just want another report, where some of the tests are use cases.
I guess in this case you have to implement your own IReporter.
I would create an annotation that I can add to test methods to logically group them. E.g.
#Test
#TestTag("F02UC01 parse input")
public void someTest(){
}
and then use the IAnnotationFinder in my custom reporter to report tests grouped by the annotation's value.