--- /dev/null
+package org.apache.lucene.facet.index.streaming;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.Set;
+
+import org.junit.Test;
+
+import org.apache.lucene.facet.index.CategoryContainerTestBase;
+import org.apache.lucene.facet.index.attributes.CategoryAttribute;
+import org.apache.lucene.facet.index.attributes.CategoryAttributeImpl;
+import org.apache.lucene.facet.index.streaming.CategoryAttributesStream;
+import org.apache.lucene.facet.taxonomy.CategoryPath;
+
+/**
+ * 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 CategoryAttributesStreamTest extends CategoryContainerTestBase {
+
+ /**
+ * Verifies that a {@link CategoryAttributesStream} accepts
+ * {@link CategoryAttribute} and passes them on as tokens.
+ *
+ * @throws IOException
+ */
+ @Test
+ public void testStream() throws IOException {
+ ArrayList<CategoryAttribute> attributesList = new ArrayList<CategoryAttribute>();
+ for (int i = 0; i < initialCatgeories.length; i++) {
+ attributesList.add(new CategoryAttributeImpl(initialCatgeories[i]));
+ }
+
+ // test number of tokens
+ CategoryAttributesStream stream = new CategoryAttributesStream(
+ attributesList);
+ int nTokens = 0;
+ while (stream.incrementToken()) {
+ nTokens++;
+ }
+ assertEquals("Wrong number of tokens", 3, nTokens);
+
+ // test reset
+ stream.reset();
+ nTokens = 0;
+ while (stream.incrementToken()) {
+ nTokens++;
+ }
+ assertEquals("Wrong number of tokens", 3, nTokens);
+
+ // test reset and contents
+ Set<CategoryPath> pathsSet = new HashSet<CategoryPath>();
+ for (int i = 0; i < initialCatgeories.length; i++) {
+ pathsSet.add(initialCatgeories[i]);
+ }
+ stream.reset();
+ while (stream.incrementToken()) {
+ CategoryAttribute fromStream = stream
+ .getAttribute(CategoryAttribute.class);
+ if (!pathsSet.remove(fromStream.getCategoryPath())) {
+ fail("Unexpected category path: "
+ + fromStream.getCategoryPath().toString(':'));
+ }
+ }
+ assertTrue("all category paths should have been found", pathsSet
+ .isEmpty());
+ }
+}