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From "Nikolay Izhikov (Jira)" <j...@apache.org>
Subject [jira] [Created] (IGNITE-12240) ReadOnlyCollectionView2X fails on iterator.next
Date Sat, 28 Sep 2019 07:36:00 GMT
Nikolay Izhikov created IGNITE-12240:
----------------------------------------

             Summary: ReadOnlyCollectionView2X fails on iterator.next
                 Key: IGNITE-12240
                 URL: https://issues.apache.org/jira/browse/IGNITE-12240
             Project: Ignite
          Issue Type: Bug
    Affects Versions: 2.7.6
            Reporter: Nikolay Izhikov


Simple reproducer below will throw {{NoSuchElementException}}.
Iterator only works if one call {{hasNext}} before {{next}}.

{code:java}
    /** */
    @Test
    public void testReadOnlyCollection() throws Exception {
        Collection<String> c1 = Collections.emptyList();
        Collection<String> c2 = Arrays.asList("1");

        ReadOnlyCollectionView2X<String> view = new ReadOnlyCollectionView2X<>(c1,
c2);

        assertEquals("1", view.iterator().next());
    }
{code}



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