Nesting test runners - unit-testing

Question

I am trying to find out whether and how it is possible to nest JUnit test runners, e.g. combine a GuiceJUnitRunner, a Parameterized and a HierarchicalcontextRunner.
To me, it seems that JUnit was not designed to achieve this easily, otherwise BlockJUnit4ClassRunner should have a method which passes the next Runner as an argument.
Someone also implemented a ParallelParameterized runner, which looks to me like combining Parallel and Parameterized was not easily possible.
When googling for "nested" and "JUnit", it comes up with lots of information for nested classes, but I'm looking for nesting Runners, not classes.

Answer 1

There is something called NestedRunner for running plain old Java classes in nested configuration.
your test starts with #RunWith(NestedRunner.class) and here is the example that I found:
#RunWith(NestedRunner.class)
public class ListTest {
// inner class for sharing common context
public class WithArrayList {
// some context for these tests
ArrayList<String> list = new ArrayList<String>();
public class WhenEmpty {
#Test
public void itIsEmpty() {
assertTrue(list.isEmpty());
}
public class AfterAddingAnElement {
// some more context for these tests
String element = "Element";
// you can use instance initializer to initialize your context
// it will be run once per test
{
// the list is still empty in here
assertTrue(list.isEmpty());
list.add(element);
}
#Test
public void itIsNotEmpty() {
assertFalse(list.isEmpty());
}
#Test
public void itContainsTheElement() {
assertTrue(list.contains(element));
}
#Test
public void addingAnotherElementIncreasesSize() {
int sizeBeforeAdding = list.size();
list.add("AnotherElement");
assertThat(list.size(), is(greaterThan(sizeBeforeAdding)));
}
#Test
public void listSizeIsStillOne() {
assertThat(list.size(), is(equalTo(1)));
}
}
#Test
public void isStillEmpty() {
assertTrue(list.isEmpty());
}
}
public class WithTwoElements {
#Before
public void init() {
list.add("Element1");
list.add("Element2");
}
#Test
public void hasSizeOfTwo() {
assertThat(list.size(), is(equalTo(2)));
}
}
}
}
and here is the source for further info