* Test how getChildrenArrays() deals with the taxonomy's growth:
*/
@Test
public void testChildrenArraysGrowth() throws Exception {
Directory indexDir = newDirectory();
TaxonomyWriter tw = new DirectoryTaxonomyWriter(indexDir);
tw.addCategory(new CategoryPath("hi", "there"));
tw.commit();
TaxonomyReader tr = new DirectoryTaxonomyReader(indexDir);
ParallelTaxonomyArrays ca = tr.getParallelTaxonomyArrays();
assertEquals(3, tr.getSize());
assertEquals(3, ca.siblings().length);
assertEquals(3, ca.children().length);
assertTrue(Arrays.equals(new int[] { 1, 2, -1 }, ca.children()));
assertTrue(Arrays.equals(new int[] { -1, -1, -1 }, ca.siblings()));
tw.addCategory(new CategoryPath("hi", "ho"));
tw.addCategory(new CategoryPath("hello"));
tw.commit();
// Before refresh, nothing changed..
ParallelTaxonomyArrays newca = tr.getParallelTaxonomyArrays();
assertSame(newca, ca); // we got exactly the same object
assertEquals(3, tr.getSize());
assertEquals(3, ca.siblings().length);
assertEquals(3, ca.children().length);
// After the refresh, things change:
TaxonomyReader newtr = TaxonomyReader.openIfChanged(tr);
assertNotNull(newtr);
tr.close();
tr = newtr;
ca = tr.getParallelTaxonomyArrays();
assertEquals(5, tr.getSize());
assertEquals(5, ca.siblings().length);
assertEquals(5, ca.children().length);
assertTrue(Arrays.equals(new int[] { 4, 3, -1, -1, -1 }, ca.children()));
assertTrue(Arrays.equals(new int[] { -1, -1, -1, 2, 1 }, ca.siblings()));
tw.close();
tr.close();
indexDir.close();
}