@Test
    public void testWronglyMatchAlsoEqualsTris() {
        String drl =
                "import org.drools.compiler.xpath.*;\n" +
                "global java.util.Set duplicateNames; \n" +
                "\n" +
                "rule DIFF_FILES_BUT_WITH_SAME_FILENAME when\n" +
                "  $ic1 : TMFileWithParentObj( parent instanceof TMFileSet ,\n" + 
                "                              $curName : name,\n" + 
                "                              $ic2: /parent{#TMFileSet}/files{name == $curName, this != $ic1 } )\n" +
                "then\n" +
                "  System.out.println( $ic1 + \" \" + $ic2 );\n" +
                "  duplicateNames.add( $ic1.getName() );\n" +
                "end\n";

        KieSession ksession = new KieHelper().addContent( drl, ResourceType.DRL )
                                             .build()
                                             .newKieSession();
        
        Set duplicateNames = new HashSet();
        ksession.setGlobal("duplicateNames", duplicateNames);
        
        TMFileSet x = new TMFileSet("X");
        TMFileWithParentObj file0 = new TMFileWithParentObj(0, "File0", 47, x);
        TMFileWithParentObj file1 = new TMFileWithParentObj(1, "File1", 47, x);
        TMFileWithParentObj file2 = new TMFileWithParentObj(2, "File0", 47, x);
        x.getFiles().addAll(Arrays.asList(new TMFile[]{file0, file1, file2}));
        
        ksession.insert( x );
        ksession.insert( file0 );
        ksession.insert( file1 );
        ksession.insert( file2 );
        ksession.fireAllRules();
        
        assertTrue( duplicateNames.contains("File0") );
        assertFalse( duplicateNames.contains("File1") );
    }