Allow referencing the extension

JUnit 5 has a neat extensions functionality which is not compatible with kotlintest even if it runs on JUnit framework. While the simple use cases in which we just need to log something can be handled by the TestListener, we cannot handle more advanced cases. In particular, how to interact with the extension (which seems reasonable and extremely useful)? Ideally, I would like to get a hold of the extension so I could query it.

In JUnit5 it would be (one of the options anyway)

@ExtendWith(MyExtension.class)
class Something() {

 @MyAnnotation
 MyType myType;

 @Test
 void doSomething() {
    myType.doSomething();
 }

}

In JUnit4 it would be even simpler

@Rule
MyRule myRule;

@Test
void fun() {
myRule.something();
}

This is useful for a variety of reasons:

• Encapsulating resource mocks along with the sets of methods to interact with them (reset etc.)
• Extracting common instantiation tasks hiding complexity from the tests - note that we could have handled it by a simple composition but then we would need to instantiate the object and later plug it into all of the lifecycle methods which is not ideal.
• More

[kboom]

Thanks guys, it indeed works fine. It might not be directly apparent though so I would recommend enhancing the readme to make this pattern absolutely clear.

[sksamuel]

I don’t know if that’s the OP’s exact requirement. If it is then what you said would work.