--- /dev/null
+package org.apache.lucene.facet.index;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.lucene.analysis.MockAnalyzer;
+import org.apache.lucene.analysis.MockTokenizer;
+import org.apache.lucene.document.Document;
+import org.apache.lucene.index.IndexReader;
+import org.apache.lucene.index.IndexWriterConfig;
+import org.apache.lucene.index.RandomIndexWriter;
+import org.apache.lucene.search.IndexSearcher;
+import org.apache.lucene.search.MatchAllDocsQuery;
+import org.apache.lucene.store.Directory;
+import org.junit.Test;
+
+import org.apache.lucene.util.LuceneTestCase;
+import org.apache.lucene.facet.example.merge.TaxonomyMergeUtils;
+import org.apache.lucene.facet.search.FacetsCollector;
+import org.apache.lucene.facet.search.params.CountFacetRequest;
+import org.apache.lucene.facet.search.params.FacetSearchParams;
+import org.apache.lucene.facet.search.results.FacetResult;
+import org.apache.lucene.facet.search.results.FacetResultNode;
+import org.apache.lucene.facet.taxonomy.CategoryPath;
+import org.apache.lucene.facet.taxonomy.directory.DirectoryTaxonomyReader;
+import org.apache.lucene.facet.taxonomy.directory.DirectoryTaxonomyWriter;
+
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+public class FacetsPayloadProcessorProviderTest extends LuceneTestCase {
+
+ private static final int NUM_DOCS = 100;
+
+ @Test
+ public void testTaxonomyMergeUtils() throws Exception {
+ Directory dir = newDirectory();
+ Directory taxDir = newDirectory();
+ buildIndexWithFacets(dir, taxDir, true);
+
+ Directory dir1 = newDirectory();
+ Directory taxDir1 = newDirectory();
+ buildIndexWithFacets(dir1, taxDir1, false);
+
+ TaxonomyMergeUtils.merge(dir, taxDir, dir1, taxDir1);
+
+ verifyResults(dir1, taxDir1);
+ dir1.close();
+ taxDir1.close();
+ dir.close();
+ taxDir.close();
+ }
+
+ private void verifyResults(Directory dir, Directory taxDir) throws IOException {
+ IndexReader reader1 = IndexReader.open(dir);
+ DirectoryTaxonomyReader taxReader = new DirectoryTaxonomyReader(taxDir);
+ IndexSearcher searcher = newSearcher(reader1);
+ FacetSearchParams fsp = new FacetSearchParams();
+ fsp.addFacetRequest(new CountFacetRequest(new CategoryPath("tag"), NUM_DOCS));
+ FacetsCollector collector = new FacetsCollector(fsp, reader1, taxReader);
+ searcher.search(new MatchAllDocsQuery(), collector);
+ FacetResult result = collector.getFacetResults().get(0);
+ FacetResultNode node = result.getFacetResultNode();
+ for (FacetResultNode facet: node.getSubResults()) {
+ int weight = (int)facet.getValue();
+ int label = Integer.parseInt(facet.getLabel().getComponent(1));
+ //System.out.println(label + ": " + weight);
+ if (VERBOSE) {
+ System.out.println(label + ": " + weight);
+ }
+ assertEquals(NUM_DOCS ,weight);
+ }
+ reader1.close();
+ taxReader.close();
+ }
+
+ private void buildIndexWithFacets(Directory dir, Directory taxDir, boolean asc) throws IOException {
+ IndexWriterConfig config = newIndexWriterConfig(TEST_VERSION_CURRENT,
+ new MockAnalyzer(random, MockTokenizer.WHITESPACE, false));
+ RandomIndexWriter writer = new RandomIndexWriter(random, dir, config);
+
+ DirectoryTaxonomyWriter taxonomyWriter = new DirectoryTaxonomyWriter(taxDir);
+ for (int i = 1; i <= NUM_DOCS; i++) {
+ Document doc = new Document();
+ List<CategoryPath> categoryPaths = new ArrayList<CategoryPath>(i + 1);
+ for (int j = i; j <= NUM_DOCS; j++) {
+ int facetValue = asc? j: NUM_DOCS - j;
+ categoryPaths.add(new CategoryPath("tag", Integer.toString(facetValue)));
+ }
+ CategoryDocumentBuilder catBuilder = new CategoryDocumentBuilder(taxonomyWriter);
+ catBuilder.setCategoryPaths(categoryPaths);
+ catBuilder.build(doc);
+ writer.addDocument(doc);
+ }
+ taxonomyWriter.close();
+ writer.close();
+ }
+
+}