[JIRA] (GLAZEDLISTS-523) Incorrect grouping in GroupingList on element update events

    [ https://java.net/jira/browse/GLAZEDLISTS-523?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=394007#comment-394007 ]

fabian_ commented on GLAZEDLISTS-523:
-------------------------------------

Fixed here: https://github.com/glazedlists/glazedlists/pull/15

> Incorrect grouping in GroupingList on element update events
> -----------------------------------------------------------
>
>                 Key: GLAZEDLISTS-523
>                 URL: https://java.net/jira/browse/GLAZEDLISTS-523
>             Project: glazedlists
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 1.8.0
>            Reporter: brands
>             Fix For: 1.10.0
>
>
> The following to test cases fail with the current implementation:
> {code}
>     public void testSplitFirstGroup_FixMe() {
>         TransactionList<String> source = new TransactionList<String>(
>                 new BasicEventList<String>());
>         Comparator<String> comparator = GlazedListsTests.getFirstLetterComparator();
>         GroupingList<String> grouped = new GroupingList<String>(source, comparator);
>         ListConsistencyListener<List<String>> listener = ListConsistencyListener.<List<String>>install(grouped, "GROUPED:", true);
>         listener.setPreviousElementTracked(false);
>         source.add("C");
>         source.add("CC");
>         source.add("CCC");
>         assertEquals("[[C, CC, CCC]]", grouped.toString());
>         source.beginEvent();
>         source.set(0, "A");
>         source.set(1, "B");
>         source.commitEvent();
>         assertEquals("[[A], [B], [CCC]]", grouped.toString());
>     }
>    
>     public void testJoinToFirstGroup_FixMe() {
>         TransactionList<String> source = new TransactionList<String>(
>                 new BasicEventList<String>());
>         Comparator<String> comparator = GlazedListsTests.getFirstLetterComparator();
>         GroupingList<String> grouped = new GroupingList<String>(source, comparator);
>         ListConsistencyListener<List<String>> listener = ListConsistencyListener.<List<String>>install(grouped, "GROUPED:", true);
>         listener.setPreviousElementTracked(false);
>         source.add("A");
>         source.add("B");
>         source.add("CCC");
>         assertEquals("[[A], [B], [CCC]]", grouped.toString());
>         source.beginEvent();
>         source.set(0, "C");
>         source.set(1, "CC");
>         source.commitEvent();        
>         assertEquals("[[C, CC, CCC]]", grouped.toString());
>     }
> {code}
> The first test failure is caused by the patch for issue 491.
> Reverting it, makes the test pass (of course, other tests start to fail then).
> The second test failure is independent of issue 491.

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