api to modify created hierarchy of descriptors would help IDE integration

[akozlova]

In IntelliJ IDEA test's tree is build upon descriptors hierarchy. So if one would like to change it, he need to change the descriptors hierarchy. In some simple cases it's done by the IDE. E.g. if user ask to run one test method for a test class, descriptor for class with exactly one child is created but the IDE hides the top level node with the following reflection abuse

 private static Description getFilteredDescription(Request request, Description description) throws NoSuchFieldException, IllegalAccessException {
    Field field;
    try {
      field = FilterRequest.class.getDeclaredField("fFilter");
    }
    catch (NoSuchFieldException e) {
      field = FilterRequest.class.getDeclaredField("filter");
    }
    field.setAccessible(true);
    final Filter filter = (Filter)field.get(request);
    final String filterDescription = filter.describe();
    if (filterDescription != null) {
      boolean isMethodFilter = filterDescription.startsWith("Method");
      if (isMethodFilter && canCompress(description)) return (Description)description.getChildren().get(0);   
    }
    return description;
  }

[kcooney]

Which Description is passed into this method and how does that description relate to the passed-in request?

[akozlova]

request is created via org.junit.runner.Request#classWithoutSuiteMethod filtered by Description.createTestDescription(clazz, methodName). Top level description corresponds to the test class and the child description corresponds to the selected test name.

[Fuud]

How should it affects runners hierarchy? Or it should affect only Descriptions?