Question

I have the following code. It works on loading the class I pointed which is TestSuiteSample. TestSuiteSample is just a standard JUnit4 Test Suite with annotations. Running as normal java project this will print “true” but running under eclipse rcp this will print “false”. Any ideas why?

File testSuiteDir = new File("D:/TestDir/");
URL classUrl; 
classUrl = testSuiteDir.toURI().toURL(); 
URL[] classUrls = { classUrl }; 
URLClassLoader ucl = new URLClassLoader(classUrls); 
Class<?> cls = ucl.loadClass("TestSuiteSample"); 

if (cls.isAnnotationPresent(SuiteClasses.class)) { 
     System.out.println("true"); 
} else {
     System.out.println("false"); 

}

I tried this one to check for annotations in cls, but still returns 0 annotations.

Annotation[] annotations = new TestClass(clazz).getAnnotations();
for (Annotation annotation : annotations) {
    System.out.println(annotation.annotationType().getName());
}

Answer 1

The problem is the SuiteClasses class is coming from an unrelated ClassLoader than from the URLClassLoader you are using to load the class you are testing. If you make the parent of the URLClassLoader the bundle or thread context ClassLoader then it should resolve to the same class.