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I have a class C which must extend a class N because it provides functionality I must have. I want C to be a JUnit test so I want to extend TestCase, because I am using a test executor, a Junit suite object, which requires tests being added to be it to be of type TestCase. This means that I have to use the TestCase extension.

Java, however, does not allow for multiple inheritance, so I need to, instead, use an interface. Is there an existing interface? Or is there a way to dynamically execute Junit tests that don't extend from TestCase?

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  • which version of junit are you using? Commented Jul 23, 2013 at 20:10
  • You need to use JUnit4 to do that. Commented Jul 23, 2013 at 20:28

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I don't extend Test or TestCase anymore. I use the @Test annotations since version 4.4.

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Obviously he is not using the new annotations API ;-)
@D.R.: Not obvious to me at all, maybe he is just used to the old way?
I adapted my answer...wasn't sure how somebody could know about unit tests but sleep away years of API evolution *g*
I need to dynamically create JUnit tests during run time. I need a runner object that takes in object instances and executes them; unless there's a way to do that when the instances aren't of type TestCase, etc.
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Do you really need your C class to extend N? Can't you just opt for composition instead of extension? Your C could have N as internal attribute and be using the functionalities provided by it. Just an idea.

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If anything, I would first avoid inheritance between the unit tests.
No, I can't compose them; N has protected methods, and I cannot put C in the same package because I didn't write N.
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The interface is called Test, see: http://junit.sourceforge.net/junit3.8.1/javadoc/junit/framework/Test.html

However, in newer versions of JUnit you should definitely go for the @Test attribute and add your test classes to your suite by specifying the type via YourTestClass.class

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This might be what I'm looking for. Your suggestion abut @Test doesn't work because I'm trying to do something like new Test(x), new Test(y), etc.. I am dynamically creating tests at run time; I can't just specify concrete classes.
If you can't specifiy concrete classes you can dynamically specify them via reflection.

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