Junit4: how to create test suite dynamically

Question

I have huge set of JUnits in my projects. Out of which, I would like to execute certain set by looking up the classes from a property file.

Prior to JUnit 4:

public class TestSuite
{
    public static Test suite()
    {
       TestSuite suite = new TestSuite();
       Class [] array = readFromPropertyFile();

       for (Class tempClz : array)
       {
           suite.addTestSuite(tempClz);
       }

    }
}

However in Junit4, I'm forced to annotate the classes at compile time as follows:

@RunWith(Suite.class)
@Suite.SuiteClasses({
   Test1.class,
   Test2.class
})
    public class TestSuite
    {
    }

I cannot, switch back to Junit 3.x because, all the test classes are no more extending TestCase meaning Test1.class is not of type Class<? extends TestCase>

Is there a way to dynamically configure the testsuite in this case ?

Is JUnit4 is not compatible to the earlier approach, it should be. — Juned Ahsan, Jul 03 '13 at 06:28
as I said, `suite.addTestSuite(tempClz);` expects tempClz to be `Class extends TestCase>` where I get an error (compile time). — Chris, Jul 03 '13 at 06:30
I had the same issue, see my answer here http://stackoverflow.com/a/42423367/2267723 — Maher Abuthraa, Feb 23 '17 at 18:22

score 2 · Accepted Answer · answered Jul 03 '13 at 23:22

The cpsuite project uses a custom annotation to determine the tests to run at runtime based on patterns. This isn't what you want, but it is a good start. You can take the source code for it and replace the "find tests" part with reading from your property file.

Note that the annotation/code is different for different versions of JUnit 4.X. If you are still on JUnit 4.4 or below, you'll need the older one.

Junit4: how to create test suite dynamically

1 Answers1