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https://issues.apache.org/jira/browse/MAHOUT-489?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ted Dunning updated MAHOUT-489:
-------------------------------
Status: Patch Available (was: Open)
This test should fail until the patch is updated with a fix.
> SequentialAccessSparseVector iterators skip items
> -------------------------------------------------
>
> Key: MAHOUT-489
> URL: https://issues.apache.org/jira/browse/MAHOUT-489
> Project: Mahout
> Issue Type: Bug
> Components: Math
> Reporter: Laszlo Dosa
> Attachments: MAHOUT-489.patch
>
>
> The following test cases fail, which iterates through the elements of the
> SequentialAccessSparseVector, because not every value is given back.
> SequentialAccessSparseVector.iterator() skips the last element, while the
> SequentialAccessSparseVector.iterateNonZero() skips the first element.
> int [] index = new int[] { 0, 1, 2, 3, 4, 5 };
> int [] values = new int[] { 0, 1, 2, 3, 4, 5 };
> SequentialAccessSparseVector vector;
> @Before
> public void setUp() {
> vector = new SequentialAccessSparseVector(6);
> for(int i = 0; i < Math.min(index.length, values.length); i++ ) {
> vector.set(index[i], values[i]);
> }
> }
> @Test
> public void testIteratorAll() {
> int elements = 0;
> Iterator<Element> it = vector.iterator();
> while (it.hasNext()) {
> System.out.println(it.next().get());
> elements++;
> }
>
> assertEquals((int)vector.get(Math.min(index.length,values.length)-1),values[Math.min(index.length,
> values.length)-1]);
> assertEquals(Math.min(index.length, values.length),elements);
> }
> @Test
> public void testIteratorNonNull() {
> int elements = 0;
> Iterator<Element> it = vector.iterateNonZero();
> while (it.hasNext()) {
> System.out.println(it.next().get());
> elements++;
> }
>
> assertEquals((int)vector.get(Math.min(index.length,values.length)-1),values[Math.min(index.length,
> values.length)-1]);
> assertEquals(Math.min(index.length,values.length),elements);
> }
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