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

    @Test
    void testHandleExceptionNoClassDefFoundErrorNull() {
        Throwable cause2 = new NoClassDefFoundError();
        Plugin plugin = new Plugin();
        Exception cause = new PluginContainerException(plugin, null, null, cause2);