ExceptionSummary summary = handler.handleException(exception);

        String expectedReference = "http://cwiki.apache.org/confluence/display/MAVEN/AetherClassNotFound";
        assertEquals(expectedReference, summary.getReference());
    }

    @Test
    void testHandleExceptionNoClassDefFoundErrorNull() {
        Throwable cause2 = new NoClassDefFoundError();

                        String message = cause2.getMessage();
                        if (message != null && message.contains("org/sonatype/aether/")) {
                            reference = "AetherClassNotFound";
                        }
                    }
                }

                if (reference == null || reference.isEmpty()) {
                    reference = getReference(dejaVu, cause);